Technical Protocol for flow-laboratory inter

Comparison SIM water 2016: Technical protocol – Rev. 09

Technical Protocol for flow-laboratory inter-comparison SIM.M.FF-S9 Participating laboratories:

CiSA (Chile) INACAL (Peru) IBMETRO (Bolivia) INTI (Argentina)

Pilot laboratories:

PTB (Germany) CENAM (Mexico)

Water flow: 10 m³/h … 130 m³/h Pilot laboratory #1:

PTB Physikalisch-Technische Bundesanstalt Department Liquid Flow Bundesallee 100 D-38116 Braunschweig Germany

Coordinator:

Carl Felix Wolff Phone: +49-531-592 8233 Email: [email protected]

Authorship and external support: Rainer Engel (Consulting Engineer) Phone: +49-531-580 96 31 Fax: +49-531-580 96 32 Email: [email protected] Pilot laboratory #2:

CENAM Centro Nacional de Metrología División de Metrología de Flujo y Volumen km 4.5 carretera a los Cués Municipio del Marques,C.P.76900 76241 Querétaro Mexico

Coordinator:

Roberto Arias Romero Phone: +52-442-211 0571 Email: [email protected]

Braunschweig, 15.06.2016 (Revision 9)

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Comparison SIM water 2016: Technical protocol – Rev. 09

Important remarks: 1)

Preparing the electronics and the software start-up for the SIM.M.FF-S9 program:

2)

3)

-

Before connecting the GATE signal cable to the data acquisition electronics (Fig. 6), check - by means of an appropriate measurement device (e.g., a scope – that the signal levels of this signal, definitely, corresponds to the specification (TTL signal specification), given in Table 9 (Item #3) in accordance with the logic level OFF and ON.

-

The GATE signal may be defined both LOW active (logic voltage < 0.8 V corresponds to OFF) and HIGH active (logic voltage > 2.0 V corresponds to ON). The maximum voltage that may be applied to the signal inputs amounts to 24 V (See: Table 9: Item #3).

-

Only after this checking operation, the GATE signal cable can be connected to the electronic box.

-

Now the LabVIEW KC software can be started as described in Table A2.

-

During the start-up of the LabVIEW program, the GATE signal, definitely, must be logically OFF, for the software derives the definition of the logic states of the GATE signal from this initial signal condition.

-

In order to guarantee the correct gating function of the GATE signal, it is absolutely necessary that this functionality is to be verified during the software operations: Step #5.

-

As the computer shuts down after a longer period of non-operation, it “loses” connectivity to the external data acquisition electronics.

-

To reestablish the LAN connection between laptop computer and external data acquisition electronics, do switch off the electronics and restart it again on the second and on third day before starting the calibration measurements.

The SIM.M.FF-S9 operators of the participating laboratories are requested to enter their measurement results into the EXCEL spreadsheet which is provided on the laptop computer (See: Paragraph 7.1.1). In addition, a photo should be sent to the pilot laboratory which shows the transfer meters installed in the calibration facility. Together with a short description of the calibration facility and the measurement process, being run there, and other decisive operational parameters, like the interconnecting pipe volume in between meter(s) under test and reference standard and flow dynamic effects [7] - it provides information for the uncertainty analysis based upon the unified approach according to EURAMET Project E1267 [4].

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Comparison SIM water 2016: Technical protocol – Rev. 09

Technical Protocol for SIM comparison (SIM.M.FF-S9) Water flow within the range 30 m³/h … 130 m³/h Contents 1

Introduction

2

Administrative information

3

Description of the transfer standard 3.1 Transfer meters 3.2 Quantities that are subject of the comparison measurements 3.3 Auxiliary devices 3.4 Characterization of the transfer meters prior to SIM.M.FF-S9 3.5 Data acquisition and operating software

4

Electronic diagnostic means (PC oscilloscope)

5

Measurement procedure 5.1 Calibration method 5.2 Alternative calibration methods 5.3 Range of measurement 5.4 Measurement programs 5.4.1 Measurement program: SIM comparison participating laboratories (except: Pilot laboratory) 5.4.2 Measurement program: Pilot laboratory 5.5 5.6

Measurement data and signal interfaces Acquisition of auxiliary measurement data for diagnosis purposes

6

Shipping the transfer standard 6.1 Unpacking the transfer standards 6.2 Mounting and dismounting the transfer package 6.3 Cleaning 6.4 Packing

7

Reporting the measurement results 7.1 Acquisition of the measurement results 7.1.1 Primary measurement data acquisition and collection 7.1.2 Real-time acquisition of additional measurement and process data 7.2 7.3

Dissemination of the measurement results Internet connectivity

8

Data that are to be provided by the participating laboratories 8.1 Piping & instrumentation diagram and description of the calibration facility 8.2 Photos of the transfer package when installed in the calibration rig 8.3 Instruments used by the laboratory in the comparison measurements 8.4 Measurement model (i.e. equations) applied for the uncertainty analysis purposes 8.5 Measurement uncertainty results (CMCs) based upon a unified EXCEL spreadsheet (which will be provided by the pilot lab)

9

Data analysis by the pilot laboratory (CRV calculation) 9.1 Determination of the Comparison Reference Value (CRV) and its dedicated uncertainty 9.2 Determination of the Lab-to-CRV and Lab-to-Lab differences as well as their dedicated uncertainties and Degrees of Equivalence

10

References

11

Terms and abbreviations

(To be continued: See following page)

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Comparison SIM water 2016: Technical protocol – Rev. 09

Appendices Appendix 1: Appendix 2: Appendix 3: Appendix 4: Appendix 5:

EXCEL spreadsheet for primary acquisition of SIM.M.FF-S9 calibration data Stepping through SIM.M.FF-S9 data acquisition LabVIEW program Data files generated by the SIM.M.FF-S9 LabVIEW program and their internal structures Software to analyze recorded calibration measurement data List of participants

Time schedule: The SIM.M.FF-S9 time schedule will be handled as a separate document, being updated and adapted continuously according to the actual status and progress of the comparison meter round-robin

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Comparison SIM water 2016: Technical protocol – Rev. 09

1

Introduction

The purpose of the Supplementary Comparison SIM.M.FF-S9 for water flow measurement is to support and prove the Calibration and Measurement Capabilities (CMC) of the participating National Metrology Institutes as part of the CIPM MRA. The evaluation of the comparison’s data is a particularly significant task in the world of metrology, because of the relevance to global trade and because such comparisons are intended to test the principal techniques in the field. Within such an evaluation is the determination of a Comparison Reference Value (CRV) and its associated uncertainty, and the degrees of equivalence of and between national measurement standards [1]. This Supplementary Comparison shall be guided by the procedures used for key comparisons which have been outlined in “Guidelines for CIPM key comparisons” and comprise: - Organization of a comparison; - The technical protocol for a comparison; - Circulation of the transfer standards; - Reporting the results of a comparison; - Preparation of the report on a comparison.

2

Administrative information

The participating flow laboratories should have proven prior to the transfer round robin during SIM.M.FF-S9 that the flow velocity profile in the test facility’s calibration line: upstream the location where the transfer meters are (will be) installed, provide flow conditions which are not disturbed by swirls or a distorted flow velocity profile. The transport of the equipment of the transfer package, which is packed in 3 metal boxes (Chapter 7.3), will be handled by a single company: Kühne + Nagel (AG & Co.) KG Heinz-Peter-Piper-Str. 8 30855 Langenhagen Germany

All issues concerning shipment and customs will be handled autonomously by the above-mentioned carrier, as soon as the transfer package has been indicated to be ready for shipment. The sequence of the participating laboratories within the time schedule of the transfer meter round robin has been outlined in order to minimize the time requirements and under the aspect of customs efforts.

3

Description of the transfer standard

3.1

Quantities that are subject of the comparison measurements: Meter k-factors

Although there occur four measurands in fluid flow metering:

1)

(Average) Volume/volumetric flow rate:

2)

(Average) Mass flow rate:

V mREF qV  V  REF  TMEAS Water  TMEAS m q m  m  REF TMEAS

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Comparison SIM water 2016: Technical protocol – Rev. 09

3)

Total(ized) volume flow measurement:

VM 

TMEAS

 V (t )dt  q

V

 TMEAS

0

4)

Total(ized) mass flow measurement:

mM 

TMEAS

 m (t ) dt  q

m

 TMEAS

0

in general, the meter K-factor of a flowmeter is the subject of flow calibration, regardless whether volumetric or gravimetric references are used in calibrating flowmeters, so it is in the SIM.M.FF-S9 water flow comparison.

TMEAS represents the measurement time of one calibration run during which the reference standard is filled with the test fluid due to the diverter operation. Under certain circumstances, even flow calibration standards whose operation principle relies on the standing-start-and-finish operation may be utilized for metering flowrates and meter K-factors. Remark:

The meter K-factor was the measurand in the CCM.FF-K1 for Water Flow in 2003/2004, too [2], which was the subject of the calibration measurements.

Depending on the operating principle of the flowmeters that are used in SIM.M.FF-S9, following meterK-factors are subject of measurement and have to be determined in SIM.M.FF-S9: 1)

Turbine flowmeter: - volume-related frequency output: KTur_V [pulses/unit volume]

2)

Coriolis flowmeter: a)

b)

- mass-related frequency output: KCor_m [pulses/unit mass] - volume-related frequency output: KCor_V [pulses/unit volume]

The installation of the transfer package comprising the above-mentioned transfer meters are shown in Figure 1. Auxiliary measurands for diagnostic purposes: These measurands are: 1)

Water density (based on a signal that is delivered by the Coriolis flowmeter, see also Figure 2);

2)

Pressure drop across the turbine meter (as an indicator for the proper operation of this meter)

They are acquired autonomously by the electronic equipment, which dedicated to the transfer package, during each calibration measurement. These devices and their arrangement in the calibration line can be seen, too, in Figure 1 and Figure 4, respectively.

3.2

Transfer meters

In addition to the transfer meters themselves, all items that are necessary for installing the transfer meters in within the calibration laboratories’ calibration rigs are part of equipment provided by the pilot laboratory: 1) Pipework for meter installation: providing connectivity to both DIN and ANSI flanges 2) Cables for connecting transfer meters and the auxiliary devices to the test electronics and, additionally, connecting cables between the electronic “box” and laptop computer, as well as the cable for mains connection. Page 6 of 43

Comparison SIM water 2016: Technical protocol – Rev. 09

The whole pipework consists of elements which have manufactured in stainless steel. The installation spacing of the meters and the SIM.M.FF-S9 pipework elements amounts to aprox. 3,430 mm in total. Indeed, it is slightly less than this length. Transfer meter #1: Table 1:

Turbine flowmeter (Figure 1a)

Manufacturer:

KEM Küppers Elektromechanik GmbH

Germany

Type:

HM 080.71.FDE040-TS15-D

For further details see manual

Serial No.:

01130721

Pipe size:

DN 80

Nominal: 80 mm

Signal pick-up:

Type: VTE*/P-Ex Carrier-frequency pulse amplifier

Signal voltage: ca. 24 V

Output signal:

Frequency

(0 Hz) … ca. 450 Hz ( at 240 m³/h)

Nominal meter K-factor:

KTur_V

Connecting cable:

11.346 Pulses/L Plug with green marker

Process connections:

Flanges

according DIN standard

Additional equipment:

Tube-bundle flow conditioner

Permanently attached to meter

Special provision:

Pin-in-hole alignment

Steel pins located in precision holes on either ends

Transfer meter #2: Table 2:

Coriolis flowmeter [6] (Figure 1b)

Manufacturer:

Rota Yokogawa GmbH & Co KG

Germany

Type:

ROTAMASS

For further details see manual

Serial No.:

D1K601386 (flow sensor) D1K601375 (flow transmitter and indicator)

Pipe size:

DN 80

Signal output #1:

Mass-flowrate related:

Nominal: 80 mm

Nominal meter K-factor: Signal output #2:

frequency

KCor_m

Volume-flowrate related: frequency Nominal meter K-factor:

KCor_V

0 kHz … 10 kHz 100 Pulses/kg 0 kHz … 8 kHz 80 Pulses/L

Signal output #3:

Fluid density: current signal

4 mA … 20 mA

Signal input:

Activate RE-ZERO of flowmeter

Binary signal:

Communication line:

Reading parameters from flowmeter

HART protocol (current output)

Connecting cable:

All signal lines are combined in a single cable

Plug with blue marker

Process connections:

Flanges

according DIN standard

Special provision:

Pin-in-hole alignment

Steel pins located in precision holes on either ends

In order to provide optimum reproducibility conditions, the transfer package meters and the interconnecting pipework are equipped with pin-in-hole alignment capabilities (See Figures 1a and 5).

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Comparison SIM water 2016: Technical protocol – Rev. 09

a)

b) Figure 1:

SIM.M.FF-S9 transfer meters: a) Turbine meter, DN 80, Manufacturer, KEM (Germany) b) Coriolis flowmeter, DN 80, Manufacturer, Rota Yokogawa [6] (Germany)

In Figure 2, the operating characteristics of the transfer package as a function of pressure loss vs. flowrate (derating curve) is shown, which could be useful in order to estimate the operability of transfer package in a calibration facility.

Transfer package DN80 1,0 0,9 1) Turbine flowmeter DN80 2) Coriolis flowmeter DN80

0,8

(Manufacturer: KEM) (Manufacturer: Yokogawa

Pressure drop [bar]

0,7 0,6 0,5 0,4 0,3 0,2 0,1 0,0 0

20

40

60

80

100

120

140

Flowrate [m³/h]

Figure 2:

Pressure drop (pressure loss) across transfer meter package (derating curve) Page 8 of 43

Comparison SIM water 2016: Technical protocol – Rev. 09

a)

b) Figure 3:

SIM.M.FF-S9 transfer meter package and pipework a) Overview b) Sample installation (1)

Inlet pipe section (adaptable to both ANSI and DIN flange connections) (2) Turbine meter (2a) Tube-bundle flow conditioner dedicated to the turbine (3) Connecting pipe section with (3a) Integrated tube-bundle flow conditioner (4) Coriolis flowmeter (5) Outlet pipe section (adaptable to both ANSI and DIN flange connections) Auxiliary devices: (A1) Pressure transmitter (A2) Temperature transmitter (A3) Differential pressure transmitter

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Comparison SIM water 2016: Technical protocol – Rev. 09

Figure 4:

Signal acquisition during the comparison measurements

Figure 5:

SIM.M.FF-S9 pipework

Inlet pipe section upstream meter #1: Table 3:

Inlet section (Figure 5)

Material:

Stainless steel

Length:

150 mm

Pipe size/diameter:

Nominal: 80 mm

Process connections:

Flanges: - Inlet side:

- Connectable both to DIN and ANSI pipework -According to DIN standard

- Outlet side: Special provisions:

Pin-in-hole alignment

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On the outlet side: Flange connection to meter #1

Comparison SIM water 2016: Technical protocol – Rev. 09

Interconnection pipe section between meter #1 and meter #2: Table 4: Connection pipe (Figure 5) Material:

Stainless steel

Length:

1,000 mm

Pipe size/diameter:

Nominal: 80 mm

Sub-item.:

Tube-bundle flow conditioner (inlet)

Fastened inside by screws

Process connections:

Flanges

According to DIN standard

Special provisions:

Pin-in-hole alignment

On either end

Outlet pipe section downstream meter #2: Table 5: Outlet section (Figure 5) Material:

Stainless steel

Length:

300 mm

Pipe size/diameter:

Nominal: 80 mm

Process connections:

Flanges:

Special provisions:

Pin-in-hole alignment

3.3

- Inlet side: - Outlet side:

-According to DIN standard - Connectable both to DIN and ANSI pipework On the inlet side: connection to meter #2

Auxiliary devices

1) Temperature transmitter: Table 6: Temperature transmitter Manufacturer:

ENDRESS + HAUSER

Switzerland

Type:

TR10-ARA1CARAH300L

For further details see manual

Serial No.:

J8089914152

Length of sensing element:

60 mm

Process connections:

Male thread:

Sensor head transmitter:

TMT182 - A

Signal output:

Current signal

4 mA … 20 mA

Communication line:

Not in use

HART protocol (current output)

Permanently screwed to tap at outlet pipe section

Connecting cable:

Plug with red marker

2) Pressure transmitter: Table 7: Pressure transmitter Manufacturer:

ENDRESS + HAUSER

Switzerland

Type:

Cerabar PMC71

For further details see manual

Serial No.:

D502B90109C

Calibration label: Process connections:

Male thread:

Permanently screwed to tap at outlet pipe section

Signal output:

Current signal

4 mA … 20 mA

Communication line:

Not in use

HART protocol (current output)

Connecting cable:

Plug with grey marker

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Comparison SIM water 2016: Technical protocol – Rev. 09

3)

Differential pressure transmitter:

Table 8:

Differential pressure transmitter

Manufacturer:

ENDRESS + HAUSER

Switzerland

Type:

Deltabar PMD70 - ABR7HCAUA

For further details see manual

Serial No.:

H201CD0109D

Calibration label: - blue: “Pressure +” - black: “Pressure –“

Process connections:

Flexible hoses:

Signal output:

Current signal

4 mA … 20 mA

Communication line:

Not in use

HART protocol (current output)

Connecting cable:

4)

Pluggable connections

Plug with blue marker

Densitometer: Signal is delivered by the Coriolis flowmeter: - 4 mA … 20 mA; - Measurement principle: See manual of the Coriolis meter [6]; - Signal connection: See Table 2.

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Transfer package electronic box

Frequency (Coriolis volume)

0 Hz … 10 kHz (8 kHz)

Frequency (Turbine volume)

0 Hz … fMAX1)

4 mA … 20 mA

(Option: 0 Hz … 10 kHz)

I

f

(Laboratory equipment)

Differential pressure

0 Hz … 10 kHz

External electronic counters

Signals: Transfer flowmeters

4x Line amplifiers Frequency (Coriolis mass)

4 mA … 20 mA 4 mA … 20 mA

Pressure

4 mA … 20 mA Density

2)

Isolation amplifier

AUTOZERO Parameter reading

HART communication (FSK)

Ethernet communication

Ethernet communication

Laptop computer

Digital output

2)

Analog input (current)

2)

Temperature

CompactRIOTM

GATE signal

Ethernet switch

Diverter (laboratory)

(National Instruments)

Digital input

Trigger amplifier 3)

Communication: Coriolis flowmeter

PC oscilloscope

Current-to-frequency converter

Modem USB communication (Coriolis flowmeter)

HART USB

Figure 6:

SIM.M.FF-S9 electronic hardware: Principle diagram of internal circuitry Remarks: 1) The maximum signal output frequency of the MUT turbine depends on its make and technical specifications; 2) The isolation amplifiers represent industrial standard components which, optionally, provide communication capabilities via the sensor current loop connection based on the HART protocol; 3) The trigger amplifier, in the preset design, is not yet an integrated part of the transfer package electronics, it will be made available as supplementary unit in small battery-powered box.

Figure 7:

SIM.M.FF-S9 electronic hardware: - Connectivity to MUTs, external electronic counters and laptop computer Page 13 of 43

Comparison SIM water 2016: Technical protocol – Rev. 09

Table 9: Item No.

Connectors and inlet/outlet sockets of the test electronics (Figure 6) Signal / power supply

1

Mains switch

2

Mains connector input (on the rear side)

3

Input signal from diverting device (1 of 4)

Plug type

Signal type

Voltage/Signal level

Color code of connector

/

/

/

/

National adapters

AC mains

110 V … 240 V (50 Hz – 60 Hz)

/

BNC socket

Binary signal

Digital logic levels:

black

(BNC cable & BNCto-banana-plug adapter included)

(TTL voltage level)

LOW: 0 to 0.8 V

(adequate types of adapters are part of the transfer package)

4

Power supply to laptop computer

Mechanically coded

5

Computer-to-electronics interface

RJ45 socket

Ethernet

HIGH: 2 to 24 V

1)

20 V (DC)

/

Ethernet

/

(connecting cable included)

6

Line pressure

Mechanically coded

Current input

4 mA … 20 mA

grey

7

Differential pressure

Mechanically coded

Current input

4 mA … 20 mA

blue

8

Fluid temperature

Mechanically coded

Current input

4 mA … 20 mA

light red

9

MUT #1: Turbine meter

Mechanically coded

Voltage input:

ca. 24 V

green

- volume flowrate

pulse signal

24 V (DC)

Supply voltage 10

MUT #2: Coriolis meter: - mass flowrate - volume flowrate - fluid density

Mechanically coded

11

Outlet socket: Power supply to Coriolis meter

Mechanically coded

12

Outlet socket:

BNC socket

- turbine meter

(BNC cable & BNCto-banana-plug adapter included)

Outlet socket:

BNC socket

13

Voltage input:

ca. 18 V

black

Voltage (AC)

110 V … 240 V (AC)

blue

Voltage input:

ca. 9 V

/

ca. 9 V

/

ca. 9 V

/

pulse signal

pulse signal

Voltage input:

- Coriolis meter (mass)

(ditto)

14

Outlet socket: - Coriolis meter (mass)

Voltage input: pulse signal

15

Outlet socket:

BNC socket (ditto) BNC socket

/

/

/

USB socket

USB signal

USB voltage level

white cover

pulse signal

- NOT in use here 16

- USB socket: provides connectivity to laptop computer

1)

National Instruments, Inc.: NI 9411 - Operating instructions and specifications, 6-channel differential digital input module [www.ni.com/manuals]

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3.4

Characterization of the transfer meters prior to comparison

The two flowmeters, which represent the transfer package, were subjected to extensive test measurements that comprised flow calibration measurements, as shown in Table 10, under defined reference conditions which are as follows: -

10 m³/h … 130 m³/h 20 °C 3 bar

Flowrate range: Reference temperature: Line gauge pressure:

Table 10: Measurement and reference conditions 1) Meters under test applied: Turbine flowmeter, DN80 1) Coriolis flowmeter, DN80 2) 2a) 2b)

Measurands that are subject of the comparison: KVolume [Pulses per unit volume] KMass [Pulses per unit mass] KVolume [Pulses per unit volume] Water density [0 … 20 mA] Flow rate [kg/min]

Flow rate [kg/s]

Flow rate [m³/h]

Q1

166

3

10,0

Q2

499

8

30,0

Q3

999

17

60,0

Q4

1664

28

100,0

Q5

2164

36

130,0

Q6

2496

42

150,0

2) Flow range: QMIN

QMAX

Q1.1 - Q1.5

Q6.1 - Q6.5

3) Reference conditions: Pressure [bar] Pressure:

pMIN pMAX

p1

2,0

p2

3,0

p3

4,0 Temperature [°C]

Temperature: TREF

Page 15 of 43

T1

10,0

T2

15,0

T3

20,0

T4

25,0

T5

30,0

T6

35,0

pREF

Comparison SIM water 2016: Technical protocol – Rev. 09

Table 11: Characterization of the transfer meters Investigation: Effects of temperature and pressure 1) Program: Effect of temperature Pressure: Temperature:

(Repeatability)

3,0 bar 10 °C Q1.5

15 °C Q1.5

20 °C Q1.5

25 °C Q1.5

30 °C Q1.5

35 °C Q1.5

Q2.5

Q2.5

Q2.5

Q2.5

Q2.5

Q2.5

Q3.5

Q3.5

Q3.5

Q3.5

Q3.5

Q3.5

Q4.5

Q4.5

Q4.5

Q4.5

Q4.5

Q4.5

Q5.5

Q5.5

Q5.5

Q5.5

Q5.5

Q5.5

Q6.5

Q6.5

Q6.5

Q6.5

Q6.5

Q6.5

Q7.5

Q7.5

Q7.5

Q7.5

Q7.5

Q7.5

in total

35

35

35

35

35

35

210

Count of measurements:

2) Program: Effect of pressure

(Tapping for pressure sensing: downstream)

Temperature: 20 °C Pressure:

Count of measurements:

2,0 bar Q1.5

3,0 bar Q1.5

4,0 bar Q1.5

Q2.5

Q2.5

Q2.5

Q3.5

Q3.5

Q3.5

Q4.5

Q4.5

Q4.5

Q5.5

Q5.5

Q5.5

Q6.5

Q6.5

Q6.5

Q7.5

Q7.5

Q7.5

35

(35)

35

3) Investigation: Reproduceability - Repeated removal and reinstallation:

in total 70

at reference conditions

For flowmeter characterization purposes, i.e. in order to analyze the temperature and pressure impacts on the meters’ characteristics (error curves), the fluid temperature and the line gauge pressure had been subject of systematic variations, which cover temperatures and pressures within ranges as shown in Table 11.

3.5

Data acquisition and operating software

The data acquisition and operating software, which is used here for SIM.M.FF-S9, relies on a LabVIEW application program (National Instruments, Inc.) that is run on a Windows 7-based laptop computer. The LabVIEW program comprises a HMI (human machine interface) which is run as a Virtual Instrument (VI) on the Windows computer as well as the operating part which was downloaded to be run on the FPGA-based process interface, realized in a CompactRIO subsystem from National Instruments, Inc. In order to start the SIM.M.FF-S9 measurement program, do start up the laptop’s Windows 7 operating system and log in: User: Password:

.\Lab#XX Lab#XX

(placeholder: XX, stands for sequence number of NMI) (default; password should be changed under Windows 7)

To start the measurement program, double click on the NI (National Instrument) icon and LabVIEW’s welcome VI window will appear. Now follow the instructions, which are described by means of the screenshots in Table 12.

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4

Electronic diagnostic means (PC oscilloscope)

In order to provide a diagnostic aid, which enables the laboratory’s operating personnel to check whether the signals delivered from the transfer flowmeters reveal a rectangular shape that guarantees error-free signal pulse counting capabilities, a so-called PC oscilloscope [5] has been implemented into the transfer package’s electronics. The functionality of the PC oscilloscope, comprising input keys and signal display, is facilitated via the laptop of the transfer package. For that purpose, no extra interconnecting wires are necessary: The electronic hardware of the oscilloscope is connected via the same Ethernet cable which is already in use to connect the laptop with the data acquisition electronics.

a)

b) Figure 8:

PC-based oscilloscope, integrated in the transfer package electronics a) Detailed view of the PC oscilloscope 1) Probe compensation: Measurement signal output 2) MULTI Connector for connection to BNC 3) MULTI port: EXT trigger input 4) LAN port 5) USB port 6) … 9) Signal inputs of Channel #4 through Channel #1 b) PC oscilloscope installed in the transfer package’s electronic box

The general handling and operation of the PC-based oscilloscope, implemented in the transfer package electronic box, is described in the oscilloscope’s “Operation manual” [5]. Before the oscilloscope will be operable within the transfer package’s “environment”, - after having switched on the electronics’ main switch – the LAN connectivity has to be activated after the scope software has been started. For these operator interactions, see procedure steps as shown in Table 12. Page 17 of 43

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Table 12: Activating the LAN connectivity of the laptop computer to the PC oscilloscope Step No.

Screen display

Activity Initial screen of Windows 7: - Double-click on: 1) PeakTech_VO_S4: Oscilloscope

1 2 further program choices: 2) Key Comparison Unit: LabVIEW 3) EXCEL icon : KC1 Measurement result data spreadsheet

Welcome screen: - Skip pop-up help window and - Click on HOME Menu (“Little House” Icon) to proceed.

2

Now select the UTILITY option to proceed.

3

In the UTILITY menu, select NETWORK.

4

The pre-adjusted network parameters are as follows: IP address: 141.25.13.70 Port: 3000 You may check it. But, please, do not modify the above parameters. Just do select CONNECT option.

5

Now the laptop computer is connected to the oscilloscope hardware and the signals on the scope’s inputs will be visualized.

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5

Measurement procedure

5.1

Calibration method Reference standards

Measurands (quantities to be calibrated) (also: error curves)

Measurement process

gravimetric

volumetric

(Balance)

(Scaled tank)

primary

derived

Static: Flying start and finish

Static weighing + diverter

Level gauging + diverter

Total volume / Total mass

Volume flow Mass flow

Standing start and finish

Static weighing

Total volume / Total mass

(Volume flow) (Mass flow)

Vol. flow / Mass flow

Volume / Mass

Dynamic:

1.1.

2.1.

Level gauging 1.2.

Dynamic weighing

2.2.

Dynamic level gauging 1.3.

2.3.a

Prover

Figure 9:

2.3.b

Systematic overview: Principles of fluid flow calibration

Figure 9 presents an overview of the calibration methods which are in use in the field of liquid flow calibration: 1. Flow calibration facilities with gravimetric reference standard 1.1. Flying-start-and-finish calibration method: Diverter-operated static weighing 1.2. Standing-start-and-finish calibration method: Static weighing 1.3. Dynamic-weigh calibration method 2. Flow calibration facilities with volumetric reference standard 2.1. Flying-start-and-finish calibration method: Diverter-operated, scaled tank 2.2 Standing-start-and-finish calibration method: Scaled tank 2.3.a Dynamic-level gauging: Scaled tank 2.3.b Volumetric proving device (prover) Calibration method 1.1: Flying-start-and-finish operation based upon diverter-operated static weighing, in general, provides the highest accuracy in liquid flow calibration. That is the reason why this technique is in use in the majority of national metrology institutes where liquid flow standard facilities are established. The set of transfer meters and the auxiliary electronics are prepared to be run, preferably, in this operation mode. The manual data input during each single flow point, when calibrating the transfer meter is described in Table A2 (Appendix 2). Options:

Participating flow laboratories, which apply deviating calibration methods (different from Method 1.1.: Gravimetric flying-start-and-finish method) have to describe: - How they derive and acquire the Time measurement signal (which is generally generated by the diverter’s operation); - The selection Gravimetric or Volumetric Reference is to chose when manually entering the calibration data at each single flow point (see Table A2: 6b).

The main objective of the measurement program run during SIM.M.FF-S9 is to verify and confirm the CMC entries of the National Metrology Institutes (MNIs) in the CMC database of BIPM. The test and measurement program(s) for SIM.M.FF-S9 Water Flow has been derived under this special aspect.

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5.4.1

Measurement program: SIM.M.FF-S9 participating laboratories (except: Pilot laboratory)

The SIM.M.FF-S9 calibration measurements of the participating laboratories provide following data and information: 1) Lab-to-lab reproducibility: Meter error drifts of the transfer meters during the st SIM.M.FF-S9 meter round robin from lab to lab (measurements on the 1 day). Of course, these values inherently comprise both meter and laboratory related effects. In order to isolated meter and laboratory related effects, the pilot laboratory’s SIM.M.FF-S9 program comprises an more extended calibration and test program part 2) Flowmeter calibration capabilities of the labs under “normal” operation conditions in order to nd prove the CMC entries in PIBM’s CMC data base (2 day). These measurement results represent the basis to determine The Comparison Reference Value (CRV). As the transfer meter package comprises flowmeters based on both volume-flow metering: a) through the turbine meter and the Coriolis meter’s volume flow output signal; and mass-flow metering principles: b) through the Coriolis meter’s mass flow output signal; all participating labs have to prove their mass flow as well their volume flow calibration capabilities, regardless whether a participating laboratory’s calibration facility primarily relies on a gravimetric or a volumetric reference system. 2) Repeatability of the laboratories’ calibration measurements: For this purpose, meter calibration is run at selected flowrates: - low flowrate: 30 m³/h, - medium flowrate: 60 m³/h, - high flowrate: 130 m³/h; with a higher number of repeated measurements, i.e. 10 repeated measurements. Derived from the above-mentioned boundary conditions, the SIM.M.FF-S9 measurement program for the participating laboratories has been derived as follows: st

1) 1 day of calibration measurements Reproducibility

(Lab-to-lab reproducibility)

Preparations:

Installation of transfer meters Coriolis meter: re-zero YES (flowrate = 0) (flowrate > 0) at 5 flowrates with 5 repeated measurements (See: Table 10) Shutdown of calibration facility Transfer package remains in calibration line

Start-up Calibration: Finish: nd

2) 2

day of calibration measurements:

Main measurement of SIM.M.FF-S9

Day-to-day repeatability Preparations: Start-up Calibration: Finish:

Coriolis meter: re-zero NO (flowrate > 0) at 5 flowrates with 5 repeated measurements (See: Table 10) Shutdown of calibration facility Page 20 of 43

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Transfer package remains in calibration line rd

3) 3 day of calibration measurements Repeatability Start-up: st 1 flowrate: nd 2 flowrate: rd 3 flowrate: Finish:

30 m³/h 60 m³/h 130 m³/h

(10x repeated measurements) (ditto) (ditto)

Shutdown of calibration facility Transfer package is removed from calibration line and prepared for shipment.

4) Shipment of transfer package

Referring to repeatability and reproducibility, also see: EURAMET Guidance for assessing repeatability and reproducibility; First Draft, 14 March 2012, (Richard Paton, NEL, UK)

5.4.2

Measurement program: Pilot laboratory

This measurement program, which will be carried out repeatedly on the several stages of the transfer meter round-robin, is to deliver – in addition to the pilot lab’s ability to provide flow traceability to SI units by a “standard” flowmeter calibration –data that refer to the flowmeters’ charactetistics like: -

Repeatability:

Comprises both meter properties as well characteristics and impacts of the calibration facility. - Repeatability in general -

-

Reproducibility: -

Lab-to-lab reproducibility Laboratory-internal reproducibility Lab-to-lab reproducibility

Measurement and test program: st

1) 1 day of calibration measurements Reproducibility

(Lab-to-lab reproducibility)

Preparations:

Installation of transfer meters Coriolis meter: re-zero YES (flowrate = 0) (flowrate > 0) at 5 flowrates with 5 repeated measurements (See: Table 10) Shutdown of calibration facility Transfer package remains in calibration line

Start-up Calibration: Finish: nd

2) 2 day of calibration measurements: Pilot Laboratory’s contribution the CRV)

Main measurement of SIM.M.FF-S9 (i.e. the

Day-to-day repeatability Preparations: Start-up Calibration:

(Installation of transfer meters is not necessary) Coriolis meter: re-zero NO (flowrate > 0) at 5 flowrates with 5 repeated measurements Page 21 of 43

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Finish:

(See: Table 10) Shutdown of calibration facility Transfer package remains in calibration line

rd

3) 3 day of calibration measurements Repeatability Start-up: st 1 flowrate: nd 2 flowrate: rd 3 flowrate: Finish:

10 m³/h 60 m³/h 130 m³/h

(10x repeated measurements) (ditto) (ditto)

Shutdown of calibration facility Transfer package is removed from calibration line

th

4) 4 day of calibration measurements Laboratory-internal reproducibility (I) Preparations: Start-up Calibration: Finish:

Installation of transfer meters Coriolis meter: re-zero YES (flowrate = 0) (flowrate > 0) at 5 flowrates with 5 repeated measurements (See: Table 10) Shutdown of calibration facility Transfer package is removed from calibration line

th

5) 5 day of calibration measurements Laboratory-internal reproducibility (II) Preparations:

Installation of transfer meters Coriolis meter: re-zero YES (flowrate = 0) Start-up (flowrate > 0) Calibration: at 5 flowrates with 5 repeated measurements (See: Table 10) Finish: Shutdown of calibration facility Transfer package remains in calibration line th

6) 6 day of calibration measurements Day-to-day repeatability (II) Preparations:

(Installation of transfer meters is not necessary) Coriolis meter: re-zero NO Start-up (flowrate > 0) Calibration: at 5 flowrates with 5 repeated measurements (See: Table 10) Finish: Shutdown of calibration facility Transfer package is removed from calibration line 7) Shipment of transfer package

6

Shipping the transfer standard

6.1

Packing and unpacking the transfer standard

An overview how the elements of the transfer package, the electronic hardware and the laptop computer are arranged in their transport case for shipment can be seen in Fig. 10.

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a)

b)

c)

Figure 10: SIM.M.FF-S9 Transfer Standard, shipping conditions (three metal boxes) a) Case #1 for the data acquisition device and laptop computer b) Case #2 for the turbine meter, connecting tubing items and auxiliary devices c) Case #3 for the Coriolis meter The two shipment cases, destined for shipping the SIM.M.FF-S9 Transfer Package meters, data acquisition electronics and laptop computer, have following sizes and weights (Mass): -

6.2

Case #1: Electronic devices, computer Weight / mass:

30 kg

-

Case #2: Turbine meters, auxiliary devices, connecting tubing items Weight / mass: 180 kg

-

Case #3: Coriolisflowmeter Weight / mass:

170 kg

Mounting and dismounting the transfer package

As already mentioned, the elements of the SIM.M.FF-S9 flow instruments and connecting pipework were prepared for high-reproducibility installation by means of pin-and-hole design as a mounting aid for a precise alignment of the flowmeters and connecting pipe segments. A description how to proceed when mounting the transfer package hardware will be placed in the shipment case - in addition to a list of all parts of the transfer package, including, too, screws and other smaller components. Prior to installation works, the completeness of the contents of the shipment boxes should be checked. In case of missing parts or damaged devices (due to visual inspection) the co-ordinator or another representative of the pilot laboratory is to be informed. For smaller parts such as screws or electrical connectors, spare parts were added to the equipment.

6.3

Cleaning

As it is prerequisite (i.e. a standard in metrology) that the transfer package meters will be run in a flow calibration standard facility where no pollutant occurs, it is not necessary to apply a special cleaning procedure to the transfer meters after having finalized the SIM.M.FF-S9 measurement program. But before preparing the flowmeters for shipment again, be sure that the inner surfaces of these meters, which were wetted during measurement, are dry again. Otherwise, dried carbonate remainders, which, generally, are solved in water, could be deposited in the flowmeters. Especially in case of the turbine meter, these carbonate deposits could cause an effect to the meter characteristics.

6.4

Packing

Before packing the transfer meters and other equipment, make a visual check whether any damages occurred to these component parts and check that the whole equipment is complete when being shipped. Page 23 of 43

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7

Reporting the measurement results

7.1

Acquisition of the measurement results

Concerning the results, i.e. the measurement data, which will be acquired during the calibration and measurement program of SIM.M.FF-S9 - in addition to the approach generally practiced in a participating laboratory - following ways of data acquisition and collection will be applied:

7.1.1

Primary measurement data acquisition and collection

For this purpose, an EXCEL spreadsheet has been developed into which those data delivered from the calibration facility are to be entered. Such an EXCEL sheet is shown in Appendix 1; it comprises following data and information: 1)

Measurement configuration:

2)

Density coefficients:

3) 4)

Pipe / flow conditions: Ambient conditions:

5)

Measurement data:

Meter K-factors of the transfer meters; and type of reference standard; Depending on which density calculation or approximation is use in the laboratory; Serve to calculation the Reynolds number(s) Ambient air density for buoyancy correction perpuses; According to the numbers of tests/calibrations, in the positions of the main part, which are shaded in light green, 30 data sets have to be entered.

It should be mentioned here that the sample EXCEL spreadsheet in Appendix 1 contains dummy data, which were placed there, in order to avoid that the main table indicates a greater number of Error codes. The EXCEL spreadsheet which is destined to be used for collecting and acquiring the measurement data in SIM.M.FF-S9 comprise 3 tables which tabbed (named) as follows: 1)

Day #1

Acquisition of calibration data on the first day of the laboratory’s SIM.M.FF-S9 measurements (Lab-to-lab reproducibility)

2)

Main_Day #2

Acquisition of calibration data on the second day of the laboratory’s comparison measurements; These measurement results represent those values that will be used to determine the Comparison Reference Values (CRV), which are: - CRV(mass flow): acquired data from Coriolis meter output - CRV(volume flow): acquired data from turbine meter output - CRV(volume flow): acquired data from Coriolis meter output

3)

Day #3_Repeatability Acquisition of calibration data on the third day of the laboratory’s measurements; In addition to the calibration data of the transfer meters during the comparison measurements, which are represented by the measurement values of the second, here meter characteristics are determined which provides a greater emphasis on the repeatability behavior or flow standard.

4)

Density_Water

This forth table of the spreadsheet contains an example how the water density, which is needed in the tables #1 through #3, might be determined. The laboratories will apply their own approaches and algorithms to determine water density and will modify and adapt this table in accordance with their practices in this issue.

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7.1.2

Real-time acquisition of additional measurement and process data

In order to provide information concerning the long-term characteristics of the transfer meters in use and the measurement conditions in the laboratories during the whole transfer meter round-robin, the SIM.M.FF-S9 transfer package comprises special sensors and measurement data acquisition electronics (which was already described in Paragraph 3.3). The handling and the Human Machine Interface (HMI) of the LabVIEW-based software, which is dedicated to this auxiliary measurement equipment, is described in Appendix 2. During the SIM.M.FF-S9 measurements, flowmeter output signals and measured values of process variables will be measured and acquired in real time. After the successful completion of the whole measurement program in a laboratory, the compilation of data files will be generated on the operator’s demand. A detailed description of this data handling procedure is given in Appendix 2, as well. The data sets that are generated by the SIM.M.FF-S9 software comprise follow data files:

7.2

File name

:=

user_flowrate_run_General.txt

File name

:=

user_flowrate_run_LabDATA.csv

File name

:=

user_flowrate_run_Meters.csv

File name

:=

user_flowrate_run_ProcessValues.csv

File name

:=

user_flowrate_run_Transition.csv

File name

:=

user_flowrate_run_Zeroing.txt

Utilization and dissemination of the measurement results

The calibration data taken during the second day of the SIM.M.FF-S9 measurements will be applied for calculating the meter K-factors of the transfer meters, which, finally, represent the basis for determining the corresponding CRVs for those three measurands that are subject of SIM.M.FF-S9. 1)

Turbine flowmeter: - volume-related frequency output: KTur_V [pulses/unit volume]

2)

Coriolis flowmeter: a)

b)

7.3

- mass-related frequency output: KCor_m [pulses/unit mass] - volume-related frequency output: KCor_V [pulses/unit volume]

Internet connectivity

Connectivity to the Internet of the SIM.M.FF-S9 electronics is available, on principle, through the laptop computer and its communication ports, but this feature will not be used in SIM.M.FF-S9, as it requires special efforts to realize communication between partners through the firewall systems.

8

Data and information that are to be provided by the participating laboratories

8.1

Piping & instrumentation diagram and description of the calibration facility

For preparing the report on SIM.M.FF-S9, the participating laboratories are asked to deliver a short description of their water flow standards. This description should refer to a classification of the calibration principle as it is given in Figure 10 and contain a simplified piping and instrumentation diagram.

8.2

Photos of the transfer package when installed in the calibration rig

In addition to the measurement data (EXCEL spreadsheet and data files with real-time data logging results), the situation of the experimental setup is to be documented by means of one or two photographs show the transfer meters installed in the calibration line. Page 25 of 43

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8.3

Instruments used by the laboratory in the comparison measurements

The laboratories are expected to deliver information (technical specifications etc.) relating to those instruments whose measuring properties contribute to the measurement uncertainty of the flow standard facility [3] (claimed as CMC entry).

8.4

Measurement model (i.e. equations) applied for uncertainty analysis purposes

An essential contribution of the laboratories of SIM.M.FF-S9 will be the measurement model, which describes the calibration of the water calibration facility individually. In order to provide a better comparability of the single uncertainty figures, delivered by the laboratories, and to create a unified basis of uncertainty figures, the recommendation is given to enter all uncertainty relevant information into an uncertainty calculation spreadsheet which has been prepared (at present available in German) and whose English version (Draft) [4] will be finalized in June 2016.

8.5

Measurement uncertainty results (CMCs) based upon a unified EXCEL spreadsheet (which will be provided by the pilot lab)

For a most effective evaluation of the laboratories’ SIM.M.FF-S9 measurement data, the laboratories are expected to finish their calibration results to fit into the unified EXCEL spreadsheet shown in Appendix 1.

9

Data analysis by the pilot laboratory

9.1

Determination of the Comparison Reference Value (CRV) and its dedicated uncertainty

For flow measurement applications, the meter K-factor is the device parameter which subject of calibration and, thus, this meter characteristics and the uncertainty of its determination represent the input quantities to the calculus of the CRV as the weighted mean of the corresponding meter K-factors that are determined in each laboratory during the SIM.M.FF-S9 meter round-robin:

K Lab _#1 (qi )



2 u Lab _#1 ( q i ) K KCRV _ type (qi )  1  2 u Lab _#1 (qi )

with the flowrates

q1 = q2 =

K Lab _#2 (qi )

 ... 

2 u Lab _#2 ( q i ) 1  ...  2 u Lab _#2 (qi )

K Lab _#N (qi ) 2 u Lab _#N ( q i ) 1 2 u Lab _#N (qi )

(9.1)

q i being in this comparison:

10 m³/h 30 m³/h

q 3 = 60 m³/h

q4

= 100 m³/h

q 5 = 130 m³/h The number of participating laboratories N in this laboratory comparison amounts to 5 (See Appendix 4: Table A.4). According to the types of test meters in SIM.M.FF-S9 and the dedicated measurands, three sets of CRVs (comprising values for 5 flowrates) will have to be determined: 1a)

Turbine flowmeter:

K CRV _ Tur _ V (qi )

1b)

Coriolis flowmeter:

K CRV _ Cor _ V (qi )

2)

Coriolis flowmeter:

K CRV _ Cor _ m (qi ) Page 26 of 43

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9.2

Determination of the Lab-to-CRV and Lab-to-Lab differences as well as their dedicated uncertainties and Degrees of Equivalence

The evaluation of the SIM.M.FF.S9 comparison data has to be carried out in according to the guidelines in the article by COX [1], in which the basic procedures were described. The procedures applied for this evaluation should be done in a unified manner for all comparisons which are or will be carried out in WGFF.

10

References

[1]

M.G. Cox: The evaluation of key comparison data, Metrologia 39(2002), pp. 589-595

[2]

J. S. Paik, K.-B. Lee, P. Lau, R. Engel, A. Loza, Y. Terao, M. Reader-Harris: CCM.FF-K1 for Water Flow –Final report, Metrologia 01/2007 - : Evaluation of measurement data – Guide to the expression of uncertainty in measurement, st 1 Edition, JCGM, September 2008 R. Engel, Ch. David: EURAMET Project No. 1267 - Harmonization of uncertainty budgets and calibration methods for liquid flow standards (final draft : under preparation)

[3] [4] [5]

PeakTech: PC oscilloscope with USB and LAN, manual (will be distributed with Transfer Package and the KC/comparison Technical Protocol)

[6]

Manual, General Specifications: Rota MASS 3 Series, Coriolis Mass Flow and Density Meter, th 14 edition, Rota Yokogawa GmbH & Co. KG, 2012

[7]

R. Engel, H.-J. Baade: Quantifying impacts on the measurement uncertainty in flow calibration arising from dynamic flow effects, Flow Measurement and Instrumentation, 44(2015), pp 51-60 TM S. Eichstädt: VIZFLOW - Pre-processing and plotting of flow data in MATLAB – Data acquisition and processing of real-time flow data, unpublished research report, PhysikalischTechnische Bundesanstalt, Berlin, 2015

[8]

www.ptb.de/cms/fileadmin/internet/fachabteilungen/abteilung_8/8.4_mathematische_modellierung/8.42/SOFTWARE/VI ZFLOW_-_Visualization_of_flow_measurement_data_in_MATLAB.pdf

11

Terms and abbreviations BIPM CCM CENAM CIPM CiSA CMC CRV DoE GUM FF HMI IBMETRO INACAL INTI MRA NMI PTB VIM WGFF

Bureau International des Poids et Mesures Consultative Committee for Mass and Related Quantities Centro Nacional de Metrología (Mexico) Comité International des Poids et Mesures Calibraciones Industriales S.A. (Chile) Calibration and Measurement Capabilities Comparison Reference Value Degree of Equivalence Guide to the Expression of Uncertainty in Measurement Fluid flow Human Machine Interface (graphic user interface of the operating software) Instituto Boliviano de Metrología (Bolivia) Instituto Nacional de Calidad (Peru) Instituto Nacional de Tecnología Industrial (Argentina) Mutual Recognition Arrangement National Metrology Institute Physikalisch-Technische Bundesanstalt (NMI of Germany) Vocabulaire International de Métrologie Working Group for Fluid Flow

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Appendices Appendix 1:

EXCEL spreadsheet for primary acquisition of SIM.M.FF-S9 calibration data A1:

Spreadsheet tables:

Tabbed Day #1 and

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Main_Day #2 , respectively.

Comparison SIM water 2016: Technical protocol – Rev. 09

A2:

Spreadsheet table:

Tabbed Day #3_Repeatability

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Appendix 2:

Stepping through SIM.M.FF-S9 data acquisition LabVIEW program

-

Before connecting the GATE signal cable to the data acquisition electronics (Fig. 6), check - by means of an appropriate measurement device (e.g., a scope – that the signal levels of this signal, definitely, corresponds to the specification (TTL signal specification), given in Table 9 (Item #3) in accordance with the logic level OFF and ON.

-

The GATE signal may be defined both LOW active (logic voltage < 3.0 V corresponds to ON) and HIGH active (logic voltage > 3.0 V corresponds to ON).

-

After this checking operation, the GATE signal cable can be connected to the electronic box.

-

Now the LabVIEW SIM.M.FF-S9 software can be started as described in Table A2.

-

During the start-up of the LabVIEW program, the GATE signal, definitely, must be logically OFF, for the software derives the definition of the logic states of the GATE signal from this initial signal condition.

-

In order to guarantee the correct gating function of the GATE signal, it is absolutely necessary that this functionality is being verified during the software operations: Step #5.

-

As the computer shuts down after a longer period of non-operation, it “loses” connectivity to the external data acquisition electronics.

-

To reestablish the LAN connection between laptop computer and external data acquisition electronics, do switch off the electronics and restart it again on the second and on third day before starting the calibration measurements.

Table A2: Stepping through the SIM.M.FF-S9 measurement program Step No.

Screen display

Activity Initial screen of Windows 7: 3 choices accessible – double-click on: 1) PeakTech_VO_S4: Oscilloscope 2) Key Comparison Unit: LabVIEW program: Check before clicking to start KC1 software that GATE signal is OFF : - Positive logics: GATE level is LOW; - Negated logics: GATE level is HIGH. 3) EXCEL icon : KC1 Measurement result data spreadsheet

1

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Welcome screen: Just click on to proceed.

2

Testing the connectivity of the USB communication between laptop computer and electronic box. In case that this communication is not indicated to be operable, the device parameters of the Coriolis meter cannot be read prior to and after auto-zeroing this flowmeter. That means that the history of maybe parameter adjustments during the KC1 meter round-robin will be lost. That is the reason why an erroneous USB connection should be eliminated. Press: - to test USB connection again; - a USB error that cannot be eliminated will be ignored.

2b

Program indicates that the program part of st the 1 day is going to be started. Click on to proceed.

3

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The program stops here, so that the calibration personnel can establish zero-flow process conditions: - Adjust control valve to OFF position. - Run fluid pumps at a speed/ flowrate that a line gauge pressure magnitude is established which corresponds to the pressure level during calibration (e.g. 3 bar). - Hold these conditions for approx. 10 minutes and observe the flow condition that no leakage passes through the control valve. - Click on to start re-zeroing meter. In case of a failed re-zeroing operation, the above procedure may be repeated.

4a

The re-zero operation of the Coriolis meter has shown to be successful: - Click on to proceed and step into the data acquisition part of the program.

Alternative decisions: - : Re-zeroing has been successful.

4b

- :

1

st

If the operator recognizes that rezeroing the Coriolis meter has not been successful (e.g.: process conditions had been instable during autozero operation), the re-zero action may be repeated.

day:

SIM.M.FF-S9 program is in STAND-BY mode: - Click on to proceed and step into data acquisition part of the program.

Attention:

5

Input options: Skip backward to prevous data series st Initially: Selection of 1 measurement point Store measurement data after the completion of the SIM.M.FF-S9 measurement data acquisition program Status indicator: Page 32 of 43

In order to guarantee the correct gating function of the GATE signal, it is absolutely necessary that this functionality is being verified during the software operations. The GATE indicator will change from RED to GREEN if the GATE signal is operating properly.

Comparison SIM water 2016: Technical protocol – Rev. 09



Indication of GATE signal status: inactive active st

Measurement program: 1 day: - 6 flowrates: 30 m³/h ... 200 m³/h, with 5 repeated measurements each; The program is automatically passing through all measurement points according to the lab’s part of SIM.M.FF-S9 as described in Paragraph 5.4.1.

6a

At first, dial whether the lab’s reference standard is either VOLUMETRIC (Select: V) or GRAVIMETRIC (Select: m) Once made this choice at the very beginning, it is valid for SIM.M.FF-S9 program’s total running time and needs no further re-activation during the following program steps). Remark: : - Default: Variant B Click on, in order to toggle from Variant B to Variant A

6b

- Measurement data to be entered at each measurement point: 1) Volume or mass (incl. buoyancy correction) (Variant A) or skip this part of data entry (Variant B) 2) Time of diversion (measurement time) 3) Pulse count from turbine meter 4) Pulse count #1 from Coriolis meter (mass-flow-related output signal) 5) Pulse count #2 from Coriolis meter (volume-flow-related output signal) Variant B: Option to enter the measurement values delivered from the respective reference standard (V or m), made in a consecutive series, one reference value after another.

6c

st

End of program for the 1 day:

7

Remark: Program may be shut down.

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Option: Opportunity to apply a final modification of measurement data (relating to a day’s measurement results) before proceeding in the SIM.M.FF-S9 program steps or before storing data at end the of KC measurement program.

7+

nd

Initial program step: 2 day Program indicates that the program part of nd the 2 day is going to be started. Click on to proceed. (Optionally: Measurements of the 1 day can be repeated).

8

2

nd

st

day:

SIM.M.FF-S9 program is in STAND-BY mode: - Click on to proceed and step into data acquisition part of the program.

9

Measurement program: 2

nd

day:

- 6 flowrates: 30 m³/h ... 200 m³/h, with 5 repeated measurements each; See Steps #6a and #6b.

10

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End of program for the 2

11

nd

day:

Remark: Program may be shut down. Option: Opportunity to apply a final modification of measurement data (relating to a day’s measurement results) before proceeding in the SIM.M.FF-S9 program steps or before storing data at end the of the comparison measurement program.

11+

Program indicates that the program part of rd the 3 day is going to be started. Click on to proceed.

12

rd

3 day: SIM.M.FF-S9 program is in STAND-BY mode: - Click on to proceed and step into data acquisition part of the program.

12a

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rd

Measurement program: 3 day: - 3 flowrates: 30 m³/h, 100 m³/h, 200 m³/h, with 10 repeated measurements each; - Measurement data to be entered at each measurement point: See Steps #4a and #4b.

13

Option: Opportunity to apply a final modification of measurement data (relating to a day’s measurement results) before storing data at end the of SIM.M.FF-S9 measurement program.

13+

Store measurement data to an external memory device (memory stick) and send these measurement data to the Pilot Laboratory by e-mail: Click on button in MAIN WINDOW (#13)

14

Data file will be generated automatically by SIM.M.FF-S9 program: - Just do Click on button.

Default: Standard storage location is the desktop of Windows 7.

14a

Please do not modify this parameter.

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Annotations:

15

- Copy data file onto an external storage media (e.g. memory stick).

- In case of incomplete measurement data sets, no decoded (i.e. readable by calibration personnel) will be generated. - Only if the whole measurement program has been completed successfully a decoded file will be generated which is accessible by the lab’s personnel.

- Send data file to Pilot Laboratory by e-mail. - Measurement data can be extracted from data file (unzipped) and decoded for laboratory-internal purposes.

Log off from laptop computer and shut down operating system,

16

Switch off the electronic box and disconnect mains power supply. Remove transfer meter package from the calibration line.

17

Drain and dry transfer meters. Remark: Be careful when applying air flow for drying in order to avoid any damage to the turbine meter.

18

Prepare the transfer package, auxiliary equipment, and computer for shipment.

19

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Appendix 3:

Data files generated by the KC SIM LabVIEW program and their internal structures

In the description following below, the file names comprise placeholders, which stand for: Example:

user flowrate run



File name :=

(e.g.: (e.g. (e.g.:

) ) )

Lab#01_30_1_General.csv

In an analogous way, the sample file names can be formed as follows: Lab#01_30_1_LabDATA.csv Lab#01_30_1_Meters.csv Lab#01_30_1_ProcessValues.csv Lab#01_30_1_Transition.csv Lab#01_30_1_Zeroing.csv

The file ending “CSV” indicates that the measurement data which are stored in these files are arranged as Comma Separated Values. File name

:=

user_flowrate_run_General.txt --- The measurement data represent summarized values each which were derived from the corresponding files: user_flowrate_run_ProcessValues.csv user_flowrate_run_Meters.csv --Gate time: Time of diversion (Measurement time) [µs] T_mean : delta T: P_mean: delta P: Meas.density: --- Coriolis volume flow --Pulse count: f_mean: delta f: --- Coriolis mass flow --Pulse count: f_mean: delta f: --- Turbine volume flow --Pulse count: f_mean: delta f: mean_flow:

File name

:=

user_flowrate_run_LabDATA.csv Volume [L] or mass [kg] (incl. buoyancy correction) Time of diversion (measurement time) [s] Pulse count from turbine meter Pulse count #1 from Coriolis meter (mass-flow-related output signal) Pulse count #2 from Coriolis meter (volume-flow-related output signal)

File name

:=

user_flowrate_run_Meters.csv st

-

1 row of values:

-

1 column of values:

st

Represents the periods of time between the active edge of the diverter’s START signal and the first active edge each of the meter signals which are dedicated to rows #1 through #3, as described below; Pulse-interspacing period of the Coriolis meter’s volume-flow output signal;

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nd

-

2

-

3 column of values:

Pulse-interspacing period of the Coriolis meter’s mass-flow output signal; Pulse-interspacing period of the turbine meter’s flow signal;

column of values:

rd

All periods of time are measured in microseconds [µs].

File name

:=

user_flowrate_run_ProcessValues.csv Logging file of measurement data: -

Sampling time: 200ms 256 sampled values ( >51,2 s) prior to the diverter’s transition to measurement position (into weigh tank), These pre-measurement logged values are followed by a zero-value row. The rows of “regularly” logged measurement values follow now. Data logging will be stopped when, after measurement, the diverter returns to its initial position again.

T P Dm P_diff

File name

:=

: : : :

Temperature Gauge pressure Fluid density (Coriolis meter) Differential pressure across turbine

[°C] [bar] [kg/L] [mbar]

user_flowrate_run_Transition.csv Logging file of measurement data from turbine output: -

File name

:=

Logging pulse-interspacing periods of time (1/frequency): [µs] Logging starts 512 data samples prior to diverter actuation into measurement position. Signal logging is stopped until the diverter actuation redirects the fluid stream from measurement position back to flow-bypass position; then another 512 data samples will be acquired and stored.

Zeroing.txt File contains data (device parameter) which refer to re-zeroing of Coriolis flowmeter as follows (sample data set):

12.03.2015-08:28:30 12.03.2015-08:28:48 12.03.2015-08:45:08 12.03.2015-13:09:44 12.03.2015-13:10:07

++ ++ ++ ++ ++

PIPO: PIPO: PIPO: PIPO: PIPO:

-6,0000 ++ CALIF: 1,6614 -6,0000 ++ CALIF: 1,6614 -11.0000 ++ CALIF: 1.6614 -11.0000 ++ CALIF: 1.6614 -11.0000 ++ CALIF: 1.6614

((To be continued automatically by LabVIEW measurement program))

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Appendix 4:

Software for analyzing the real-time calibration measurement data acquired in the participating laboratories of the SIM comparison

As shown in [7], dynamic flow effects, that are primarily random-like fluctuations in fluid flow rate during a calibration measurement, are sources of additional measurement uncertainty, which, as a general practice, is based on a steady-state uncertainty analysis approach. TM That is the reason why a special purpose application program (based on MATLAB ) has been developed [8] that extracts the real-time measurement data, scattered over the several parameter and data files (See: Appendix 2), and provides data series with a common time axis (See: Table A4). By this, those measurement data are available in a way so that they may be utilized beneficially for further scientific analysis purposes. Table A4: Oscilloscope-like data visualization of the real-time calibration measurement data (an example) for the supplementary comparison SIM.M.FF-S9 during a single calibration run at 30 m³/h and 240 m³/h [8]

1a)

Coriolis flowmeter: - Mass flow

Signal output frequency: f(Coriolis mass flow) [Hz]

1b)

a)

@ 30 m³/h

b)

@ 240 m³/h

a)

@ 30 m³/h

b)

@ 240 m³/h

a)

@ 30 m³/h

b)

@ 240 m³/h

Coriolis flowmeter: - Volume flow

Signal output frequency: f(Coriolis volume flow) [Hz]

2) Turbine flowmeter - Volume flow Signal output frequency: f(Turbine volume flow) [Hz]

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3) Gage pressure [bar]

a) @ 30 m³/h

b)

@ 240 m³/h

a) @ 30 m³/h

b)

@ 240 m³/h

a) @ 30 m³/h

b)

@ 240 m³/h

a) @ 30 m³/h

b)

@ 240 m³/h

4) Water temperature [°C]

5) Water density -Coriolis flowmeter [kg/L]

6) Differential pressure: - across the turbine meter [mbar]

A beneficial outcome of the analysis of the real-time calibration measurement data is the availability of a data basis for analyzing the dynamic impact of random-like flowrate fluctuations on the measurement uncertainty budget of the measurement process. For this purpose, frequency distribution diagrams have been calculated, which are based on the time responses of the acquired measurement data. From this, statistical parameters like means and standard deviations of the measurands can be determined, which are necessary in order to be taken into account as additional dynamic impacts on the measurement uncertainty budget [7].

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Table A5: Examples of the statistical analysis of calibration measurement data (frequency distribution diagram) during a single calibration run at 30 m³/h, 60 m³/h and 240 m³/h [8] - Flowmeter, Time response of meter reading

Frequency distribution

(raw data & moving averages)

(raw data & moving averages)

- Measurand, - Flowrate

1) Coriolis flowmeter: - Volume flow

@ 30 m³/h

2) Coriolis flowmeter: - Volume flow

@ 60m³/h

3) Coriolis flowmeter: - Volume flow

@ 240 m³/h

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Appendix 5: List of participants Table A.6: List of participants (Rev. 02) Germany (EURAMET)

PTB Braunschweig Project Coordinator/PTB : Carl Felix Wolff

Rainer Engel

1

04.03.2016

Email : [email protected] Phone: +49-531-592 8233 Email: [email protected] Phone +49-531-580 96 31

Shipping address: Physikalisch-Technische Bundesanstalt Department Liquid Flow Bundesallee 100 38116 Braunschweig Germany

República de Chile (SIM)

2

INACAL Instituto Nacional de Calidad Contact: Carlos Ochoa Quiquia

Email: [email protected] Phone: +51-1-982 535 275

Shipping address: Av. Canadá 1542 San Borja Lima 41 República del Perú

3

Estado Plurincionál de Bolívia (SIM)

IBMETRO Instituto Boliviano de Metrología Contact: Franklin David Espejo Alcázar Email: [email protected] Phone: +591-2-23 720 46 int.330 Shipping address: Avenida Camacho esquina Bueno No. 1488 Planta Baja (Edificio Anexo) La Paz Boívia

República Argentina (SIM)

INTI Instituto Nacional de Tecnología Industrial Contact: Marcelo Silvosa Email: [email protected] Phone: +54-11-4724-6200 Shipping address: Parque Tecnológico Miquelete Av. General Paz 5445 B1650WAB San Martín Buenos Aires Argentina

Estados Unidos Mexicanos (SIM)

CENAM Centro Nacional de Metrología Contact: Roberto Arias Romero

5

6

Email: [email protected] Phone: +56-57-2422750

Shipping address: Barros Arana 73 Iquique República de Chile

República del Perú (SIM)

4

CiSA Calibraciones Industriales S.A. Contact: Jeny Vargas Angel

Shipping address: km 4.5 carretera a los Cués Fracc. Industrial El Marqués El Marques, Qro. México C.P.76246

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Email: [email protected] Phone: +52-442-211 0571