P-G-08—Procedure for the verification and reverification of electronic volume conversion devices pursuant to the requirements of S-G-08

Category: Gas
Issue date: 2022-07-12
Effective date: 2022-07-12
Revision number: 1
Supersedes: P-G-08

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Table of contents

• 1.0 Purpose
• 2.0 Scope
• 3.0 Definitions
• 4.0 References
• 5.0 Safety
  • 5.1 Measurement Canada's health and safety policy
  • 5.2 Contractor and third-party safety and security requirements
  • 5.3 Potential hazards
  • 5.4 Contractor's responsibilities
• 6.0 Standards and test equipment
  • 6.1 Working level standards
  • 6.2 Inspection and test equipment
• 7.0 Inspection worksheet
• 8.0 Assessment of conformity with administrative requirements
  • 8.1 Interrogation hardware and/or software
  • 8.2 Markings
    • 8.2.1 Electronic volume conversion device
    • 8.2.2 Electronic volume conversion function
  • 8.3 Legally relevant software
    • 8.3.1 Software update capabilities
    • 8.3.2 Version
    • 8.3.3 Hash code
  • 8.4 Configurable legally relevant parameters
  • 8.5 Electronic volume conversion devices and functions qualifying under bulletin G-02
• 9.0 Assessment of conformity with technical requirements
  • 9.1 Device construction and condition
  • 9.2 Electronic display
  • 9.3 Leakage
  • 9.4 Event logger
  • 9.5 Telemetering functions or devices
    • 9.5.1 Built-in pulse generator
    • 9.5.2 Automatic meter reading function or device
• 10.0 Assessment of conformity with metrological requirements
  • 10.1 Pressure and/or temperature working level standards
  • 10.2 Device or function configuration
  • 10.3 Performance test plan
  • 10.4 Unconverted volume registration
    • 10.4.1 Instrument drive
    • 10.4.2 Low frequency pulses
    • 10.4.3 High frequency pulses (single input signal)
    • 10.4.4 High frequency pulses (dual input signals)
    • 10.4.5 Detection of impeller shaft revolutions
  • 10.5 Pressure multiplier
  • 10.6 Temperature multiplier
  • 10.7 Supercompressibility correction function
  • 10.8 Volume conversion function
  • 10.9 Volume to energy conversion function
• 11.0 Sealing
• 12.0 Inspection certificate
• 13.0 Fees
• 14.0 Nonconformity and defect reporting
• 15.0 Revision
• Appendix Performance test plan for an electronic volume conversion device or function

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1.0 Purpose

This procedure provides instructions for the verification and reverification of electronic volume conversion (EVC) devices and functions pursuant to the requirements of S-G-08.

This procedure may also be used by Measurement Canada (MC) inspectors and/or auditors when conducting product audits, dispute investigations and any other inspection activity involving EVC devices or functions.

2.0 Scope

This procedure applies to all EVC devices and functions within the scope of S-G-08 that are subjected to 100% inspection for the purposes of verification and reverification.

3.0 Definitions

Renewed device

(dispositif remis à neuf)

A previously used metering device restored to the technical and metrological state of a new device by a manufacturer or an authorized service provider in accordance with specifications and procedures whose suitability for the purpose of device renewal has been attested to by the device manufacturing corporation.

Reserviced device

(dispositif remis à niveau)

A previously used metering device subjected to calibration or light repair under the controlled conditions and documented procedures of an accredited organization's quality management system recognized by Measurement Canada.

Refer to S-G-08 for definitions of other terms that are relevant to this procedure.

4.0 References

• GEN-16—Conformance With Industry Safety and Security Requirements
• GEN-27—Policy on the Issuance of Inspection Certificates and the Recording of Test Results and Reverification Periods Required Under the Electricity and Gas Inspection Act
• GEN-33—Conditional Permission for Using Electricity and Gas Telemetering Devices and Systems in Service Without Verification and Sealing

Refer to S-G-08 for other reference documents that are relevant to this procedure.

5.0 Safety

5.1 Measurement Canada's health and safety policy

Inspectors must be aware of and fully conform to MC's health and safety policy, including but not limited to the provisions relating to the following:

• Hazardous materials
• Inspections at gas meter shops
• Personal protective equipment (e.g. safety glasses, safety shoes)
• Workplace Hazardous Materials Information System

5.2 Contractor and third-party safety and security requirements

Subject to the policy established in GEN-16, inspectors must be aware of and conform to the contractor's and any third-party safety and security requirements that are applicable to the work site.

5.3 Potential hazards

Inspectors must be aware of the following potential hazards which may exist at a test facility:

• Debris or sparks from grinders
• Debris from a compressed air jet
• Dropped or falling meters
• Hazardous materials
• Moving forklifts
• Overhead meter conveyors
• Stacked skids or pallets of meters

5.4 Contractor's responsibilities

The contractor is responsible for supplying the required test facilities, test equipment and certified gas measuring apparatus required to perform the inspection in a safe, efficient and convenient manner.

6.0 Standards and test equipment

6.1 Working level standards

Subject to the conversion type of the EVC device or function, the following certified working level standards are required:

• Absolute pressure standard
• Gauge pressure standard
• Temperature standard

6.2 Inspection and test equipment

Subject to the type, construction and configuration of the EVC device or function to be inspected, the following equipment is required:

• Calculator
• Compressed nitrogen (for use as a high pressure source)
• Controlled temperature bath(s)
• Conventional verification seals
• Laptop computer with a software application(s) authorized by MC for inspection purposes
• Pressure hoses and fittings
• Pulse counters
• Pulse generators (low and high frequency)
• Rotary meter volume simulator authorized for use by MC
• Sealing tool
• Sealing wire
• Teflon tape
• Turntable
• Verification marks (sticker type)
• Wrenches for pressure fittings

7.0 Inspection worksheet

1. Obtain the inspection worksheet referred to in this procedure from any MC electricity and gas regional office.
2. Record the following information pertaining to the device or function:
   • Owner's name
   • Contractor's name, if different from the owner's name
3. Record the device's condition (i.e. new, renewed or reserviced) and the purpose of the inspection, with consideration given to these factors:
   • Verification applies to newly manufactured devices;
   • Reverification applies to previously used devices that have been reserviced or renewed;
   • Where a new EVC module is to be integrally sealed to a previously used rotary meter pressure body, the resulting single device is to be considered as previously used and reverified.

     Note: If an EVC function is built into a volumetric flow meter, the condition of the flow meter and the purpose of the inspection are to be recorded.

8.0 Assessment of conformity with administrative requirements

8.1 Interrogation hardware and/or software

1. Review the device or function's notice of approval (NOA) and determine if any interrogation hardware and/or software will be required to facilitate the inspection. If so, obtain it from the meter owner, contractor or authorized service provider.
2. If the interrogation hardware and/or software identified in the NOA is the sole means of accessing certain information required for inspection purposes (see subsection 8.4. of S-G-08) and that information cannot be accessed, record this as a nonconformity on the inspection worksheet. If possible, determine if the root cause is the device or function, or the interrogation hardware and/or software.

8.2 Markings

8.2.1 Electronic volume conversion device

1. Record the following information on the inspection worksheet:
   • Manufacturer's name or registered trademark,
   • Inspection number assigned by the contractor,
   • Model number or type designation,
   • Serial number,
   • Departmental approval number (except where the device was approved prior to July 1987),
   • Ambient temperature range (if the device was approved with a range other than −30 °C to 40 °C),
   • Input volume per revolution of the instrument drive (as applicable),
   • Input volume per pulse (as applicable),
   • Pressure measuring range (as applicable),
   • Temperature measuring range (as applicable),
   • Atmospheric pressure (as applicable),
   • Base pressure (as applicable),
   • Base temperature (as applicable),

   • Pulse values (e.g. volume per pulse) of each built-in pulse generator (as applicable).

     Note: This list represents the most common markings required by S-G-08 for an EVC device.

2. Confirm that the device conforms to the marking requirements of S-G-08 while noting that certain information is not required to be marked if it can be accessed via the electronic display or interrogation hardware and/or software.
3. Record the conformance status on the inspection worksheet and include details of any nonconformity to the requirements.

8.2.2 Electronic volume conversion function

1. Record the following information, as applicable, on the inspection worksheet:
   • Base pressure,
   • Base temperature,
   • Pressure measuring range,
   • Pulse values (e.g. volume per pulse) of each built-in pulse generators,
   • Temperature measuring range.

     Note: This list represents the most common markings required by S-G-08 for an EVC function built into a gas flow meter.

2. Confirm that the device conforms to the marking requirements of S-G-08 while noting that certain information is not required to be marked if it can be accessed via the electronic display or interrogation hardware and/or software.
3. Record the conformance status on the inspection worksheet and include details of any nonconformity to the requirements.

8.3 Legally relevant software

8.3.1 Software update capabilities

1. Consult the device or function's NOA, determine if it is approved with a traced update capability, and record this on the inspection worksheet.
2. Consult the device or function's NOA, determine if it is approved to permit certain legally relevant parameters to be reconfigured without requiring reverification, and record this on the inspection worksheet.

8.3.2 Version

1. Record on the inspection worksheet the version of each of the device or function's legally relevant software parts.
2. Confirm that the version of each of the device or function's legally relevant software parts is identified in the NOA as being approved.
3. Record the conformance status on the inspection worksheet and include details of any nonconformity to the requirements.

8.3.3 Hash code

1. If the device or function is approved with a traced update capability, generate a hash code for each of its legally relevant software parts.

   Note: The device or function should include a hash function. Generating a hash code for a legally relevant software part requires application of the hash function to that software part.

2. Record the generated hash code for each legally relevant software part on the inspection worksheet in a way that clearly shows the associated software part version.
3. Confirm that the generated hash code for each software part version matches the hash code identified in the device or function's NOA.

   Note: The intent is to confirm that each legally relevant software part is identical to the version that has been approved, as identified in the device or function's NOA. This represents an integrity check and provides a means of confirming that a legally relevant software part version has not been modified or corrupted.

4. Record the conformance status on the inspection worksheet and include details of any nonconformity to the requirements.

8.4 Configurable legally relevant parameters

1. If the device or function is approved to permit certain legally relevant parameters to be reconfigured without requiring reverification, determine if the owner or contractor has identified any legally relevant parameters they may want to reconfigure after the device or function has been sealed.
2. Confirm that any such parameters are identified in the NOA as being approved to be reconfigured without requiring reverification of the device or function.
3. Any legally relevant parameters identified by the owner or contractor that are not identified in the NOA are to be excluded. It may be necessary to inform the owner or contractor that reconfiguring such parameters would represent a verification triggering event.
4. As applicable, for each configurable legally relevant parameter identified by the owner or contractor, record on the inspection worksheet the additional values also identified by the owner or contractor that will need to be tested and verified.

   Note: Where a legally relevant function has been approved to use configurable legally relevant parameters within an approved range, any value of such a legally relevant parameter within its approved range is considered verified when the function is verified. An example of such a legally relevant function is a supercompressibility correction function configured to the AGA8 detailed method or the NX-19 standard and method of calculation.

8.5 Electronic volume conversion devices and functions qualifying under bulletin G-02

This section applies to EVC devices and functions within the scope of bulletin G-02 that qualify for temporary dispensation from sealing.

Bulletin G-02 identifies modifications to an EVC device or function that are not considered to be verification triggering events, provided any applicable conditions are satisfied.

1. If the device or function presented for inspection is within the scope of bulletin G-02, determine whether the owner or contractor has identified any legal relevant parameters that are to be reconfigured in service.
2. As applicable, for each configurable legally relevant parameter identified by the owner or contractor, record on the inspection worksheet the additional values also identified by the owner or contractor that will need to be tested and verified.

9.0 Assessment of conformity with technical requirements

9.1 Device construction and condition

1. Visually examine the construction and condition of the device and confirm that it conforms to the requirements of S-G-08.
2. Record the conformance status on the inspection worksheet and include details of any nonconformity to the requirements.

9.2 Electronic display

1. Visually examine the device or function's electronic display and confirm that it conforms to the requirements of S-G-08.
2. If the device or function provides for a segment test, perform this test and assess whether all segments are present and clearly readable.
3. Record the conformance status on the inspection worksheet and include details of any nonconformity to the requirements.

9.3 Leakage

If the device or function includes a pressure sensor, assess its conformance with the requirements specified in subsection 8.3 of S-G-08 by following these steps:

1. Connect a pressure source and pressure standard, and apply the device or function's maximum rated pressure.
2. Isolate the pressure source from the pressure standard and the device or function.
3. Observe the pressure standard for any drop in pressure indicative of a leak.
4. If you detect or suspect a leak, use soapy water at all connection points up to and including the pressure connection point at the device or function.
5. If you don't detect a leak up to this point, the device or function's pressure sensing system may be leaking. Ask a technical representative at the meter test facility to confirm and correct this before proceeding with the inspection.
6. If you suspect a leak in the device or function but you cannot confirm and correct it, suspend the inspection and record the reason on the inspection worksheet.

9.4 Event logger

1. If the device or function is approved to permit certain legally relevant parameters to be reconfigured without requiring reverification, confirm that the event logger has correctly recorded any modifications to legally relevant parameters during the inspection.
2. If no such modifications were made during the inspection, reconfigure at least one legally relevant parameter to a different value and then back to its intended value to confirm that the event logger correctly records these two events.

   Note: This test should be performed following the assessment of the device or function's conformity with metrological requirements.

3. Record the conformance status on the inspection worksheet and include details of any nonconformity to the requirements.

9.5 Telemetering functions or devices

9.5.1 Built-in pulse generator

1. If the device or function includes a built-in pulse generator, consult GEN-33 to determine whether it qualifies for dispensation from verification and sealing.
2. If the pulse generator does not qualify for dispensation from verification or if this cannot be confirmed, test it in accordance with the requirements in subsection 8.6.1 of S-G-08 and following steps 3 to 6 below.

   Note: This test can be performed simultaneously with test number 1 of the volume conversion function (see subsection 10.8).

3. Record the quantity associated with the device or function's pulse generator on the inspection worksheet (e.g. unconverted volume, converted volume, energy).
4. Record the pulse weight (e.g. volume per pulse) on the inspection worksheet.
5. Accumulate a sufficient quantity of unconverted volume, converted volume and/or energy (as applicable) to confirm that the number of pulses produced by the pulse generator is correct and consistent with the device or function's accumulated quantity, configured pulse weight and configured quantity multiplier.
6. Record the conformance status on the inspection worksheet and include details of any nonconformity to the requirements.

9.5.2 Automatic meter reading function or device

1. If the EVC device is retrofitted with an automatic meter reading (AMR) device, confirm that it is of an approved type.
2. If the retrofit-type AMR device can only be attached to or removed from a verified and sealed EVC device, or a meter with a built-in EVC function, confirm that it is approved for use with the particular make and model of the device.
3. Consult GEN-33 to determine whether the meter's built-in AMR function or the retrofit-type AMR device qualifies for dispensation from verification and sealing.
4. If required, the AMR function or device will need to be inspected and verified.

10.0 Assessment of conformity with metrological requirements

10.1 Pressure and/or temperature working level standards

1. Ensure the pressure and/or temperature standards selected for testing of the device or function have suitable measuring ranges, resolution and accuracy for the particular device or function under test.
2. Ensure the selected standards have a valid calibration certificate.

10.2 Device or function configuration

Confirm that the device or function is configured in accordance with the requirements of S-G-08.

10.3 Performance test plan

Complete a performance test plan for the device or function using the form in the appendix and following these steps:

1. Determine if the testing requirements specified in subsection 9.3.6 (Unconverted volume registration) of S-G-08 are applicable:

   Note: The requirements specified in 9.3.6 of S-G-08 are only applicable to EVC devices that are to be inspected and verified or reverified independent of a volumetric gas flow meter.

2. If 9.3.6 applies, identify the type of volumetric input the device is constructed and configured to detect and process.

   Note: Some EVC devices may detect and process more than one volumetric input (of the same or differing type). For example, an EVC device may detect a turbine meter's instrument drive revolutions and its single or dual high frequency pulse signals.

3. Identify the device or function's conversion type.
4. Refer to Table 1 to determine if the testing requirements specified in the following subsections of S-G-08 are applicable:
   • 9.3.7 Pressure multiplier
   • 9.3.8 Temperature multiplier
   • 9.3.9 Supercompressibility correction function

   Table 1—Applicability of performance testing requirements by volume conversion type

   Conversion type	Testing requirements
   Pressure only	If the pressure multiplier (Pm) or pressure (P) is accessible, 9.3.7 applies.
   Temperature only	If the temperature multiplier (Tm) or temperature (T) is accessible, 9.3.8 applies.
   Pressure and temperature	If the Pm or P and Tm or T are accessible, 9.3.7 and 9.3.8 apply.
   Pressure, temperature and supercompressibility	If the Pm or P, Tm or T and supercompressibility factor squared (Fpv2) or the square of the supercompressibility factor (Fpv) are accessible, 9.3.7, 9.3.8 and 9.3.9 apply.

5. If subsection 9.3.7 applies, determine whether the pressure multiplier or apparent pressure multiplier is to be tested.

   Note: The apparent pressure multiplier can be tested if the actual pressure multiplier is not readily accessible.

6. If subsection 9.3.8 applies, determine whether the temperature multiplier, apparent temperature multiplier or temperature is to be tested, and whether testing is to be conducted at all specified test points (i.e. T1, T2 and T3) or at a single temperature between the T1 and T3 test points.

   Note: Testing the temperature is only an option for a temperature only conversion type. The apparent temperature multiplier may be tested if the actual temperature multiplier is not readily accessible. Testing may be conducted at a single temperature, except where a device or function includes a supercompressibility correction function and a maximum pressure exceeding 300 psia or psig, or the metric equivalent.

7. If subsection 9.3.9 applies, determine whether the Fpv² or the Fpv is to be tested, the configured standard and method of calculation (e.g. AGA8 detailed equation or GCN, NX-19) and whether the test is to be conducted at all specified test point combinations or at a single test point combination only.

   Note: The square of the Fpv may be tested if the Fpv² is not readily accessible. Testing at a single test point combination is only an option if the maximum approved pressure does not exceed 300 psia or psig, or the metric equivalent. If the Tm or apparent Tm is to be tested at all specified temperature test points, then the Fpv² should be tested at all specified test point combinations. The Pm, Tm and Fpv² can be tested simultaneously.

8. Determine if the requirements specified in subsection 9.3.10 (Volume Conversion Function) of S-G-08 apply.

   Note: The requirements specified in 9.3.10 are not applicable to the temperature conversion function built into ultrasonic meters having a maximum approved flow rate ≤ 1700 ft³ /h, or the metric equivalent.

9. If subsection 9.3.10 applies, determine whether the tests specified in Table 4 or Table 5 of S-G-08 apply and whether test number 1 or all specified tests are required.

   Note: The tests specified in Table 4 apply to the pressure only conversion type, and to the other conversion types where single temperature testing is not chosen or is not an option. The tests specified in Table 5 apply where single temperature testing is an option and the option has been selected by the owner.

10. Determine if the requirements specified in subsection 9.3.11 (Volume to Energy Conversion) of S-G-08 apply.

    Note: If the device or function is approved with a volume to energy conversion function, the requirements specified in subsection 9.3.11 apply.

11. If subsection 9.3.11 applies, determine whether the device or function is configured to apply a fixed calorific value or to calculate a calorific value using its configured gas composition parameters. As applicable, identify the standard (e.g. GPA 2172) the device or function uses to calculate the calorific value.

10.4 Unconverted volume registration

1. Consult the completed performance test plan to determine the applicability of this subsection.
2. Where applicable, test the performance of the device's unconverted volume registration in accordance with the requirements specified in section 9.3.6 of S-G-08 and the instructions in the applicable subsections.

10.4.1 Instrument drive

1. Mount and secure the device on a turntable.
2. Ensure the turntable's drive mechanism will properly engage with and continuously rotate the device's drive mechanism.
3. Record the following information on the inspection worksheet:
   • Units and multiplier for mechanically and/or electronically registered unconverted volume,
   • Volume per input revolution,
   • Mechanically and/or electronically registered unconverted volume.

4. Start the turntable and ensure the rate of volumetric input does not exceed the maximum value indicated in the device's NOA or specified by the manufacturer.

   Note: Ensure the device's follower magnet is not aligned with the proximity detecting reed switches.

5. When sufficient volume has been accumulated by the device, stop the turntable and record the device's mechanically and/or electronically registered unconverted volume on the inspection worksheet.

6. Calculate the mechanically and/or electronically accumulated unconverted volume registered by the device under test (DUT) as shown below and record the result on the inspection worksheet.

   ${\mathrm{Vunconv}}_{\left(\mathrm{DUT}\right)}=\left(\mathrm{final reading}-\mathrm{initial reading}\right)\times \mathrm{volume multiplier}$

   Where,

   • Vunconv_(DUT) is the accumulated unconverted volume registered by the device under test

7. Calculate the conventional true value of the simulated unconverted volume applied to the device as shown below and record the result on the inspection worksheet.

   ${\mathrm{Vunconv}}_{\left(\mathrm{true}\right)}=\#\mathrm{ of revs}\times \frac{\mathrm{volume}}{\mathrm{rev}}$

   Where,

   • Vunconv_(true)is the conventional true value of the simulated unconverted volume
   • # of revs is the number of actual or simulated instrument drive revolutions applied to the device
   • Volume / rev is the volume per instrument drive revolution marked and/or configured in the device

8. Calculate the absolute error of the device's mechanically and/or electronically accumulated unconverted volume as shown below, and record the result on the inspection worksheet.

   $\mathrm{Absolute error}={\mathrm{Vunconv}}_{\left(\mathrm{DUT}\right)}-{\mathrm{Vunconv}}_{\left(\mathrm{true}\right)}$

9. Assess the test results for conformance with the performance requirement specified in subsection 9.4.1 of S-G-08, and record the conformance status on the inspection worksheet.

10.4.2 Low frequency pulses

1. Connect a low frequency pulse generator to the device's low frequency pulse input terminals. If the pulse generator does not include a pulse counter, connect a compatible pulse counter between the generator and the EVC device's low frequency input terminals.

   Note: The pulse generator's output pulses must be compatible with the type of input pulses the device is constructed and/or configured to detect and process (e.g. live or dry, 2-wire form A or B, 3-wire form C).

2. Zero the pulse counter.
3. Record the following device information on the inspection worksheet:
   • Units and multiplier for unconverted volume,
   • Volume per input pulse,
   • Registered unconverted volume.
4. Start the pulse generator and ensure the rate of volumetric input does not exceed the maximum value indicated in the device's NOA or specified by the manufacturer.
5. When sufficient volume has been accumulated by the device, stop the pulse generator.
6. Record the device's unconverted volume reading on the inspection worksheet.
7. Calculate the device's accumulated unconverted volume as shown in step 6 of 10.4.1 and record the result on the inspection worksheet.
8. Calculate the conventional true value of the simulated unconverted volume applied to the device as shown below, and record the result on the inspection worksheet.

   ${\mathrm{Vunconv}}_{\left(\mathrm{true}\right)}=\#\mathrm{ LF pulses}\times \frac{\mathrm{volume}}{\mathrm{pulse}}$

   Where,

   • Vunconv_(true) is the conventional true value of the simulated unconverted volume
   • # of LF pulses is the number of low frequency pulses applied to the device
   • Volume / pulse is the volume per low frequency pulse value configured in the device
9. Calculate the absolute error of the device's accumulated unconverted volume as shown in step 8 of 10.4.1, and record the result on the inspection worksheet.
10. Assess the test results for conformance with the performance requirement specified in subsection 9.4.1 of S-G-08, and record the conformance status on the inspection worksheet.

10.4.3 High frequency pulses (single input signal)

1. Connect a high frequency pulse generator to the device's high frequency pulse input terminals. If the frequency generator does not include a pulse counter, connect a compatible pulse counter between the generator and the EVC device's high frequency input terminals.

   Note: The pulse generator's output signal must be compatible with the type of input signal that the device is constructed and/or configured to detect and process.

2. Configure the pulse generator to apply a frequency that does not exceed the device's maximum approved value or the manufacturer's maximum specified value.
3. Record the following device information on the inspection worksheet:
   • Units and multiplier for the device's unconverted volume,
   • Pulse weight or K factor (e.g. volume per pulse or pulses per unit of volume).
4. Confirm that the device's input pulse buffer is empty (i.e. no stored pulses are still being processed).
5. Record the device's unconverted volume on the inspection worksheet.
6. Zero the pulse counter.
7. Start the pulse generator and adjust as needed during the test.
8. When sufficient volume has been accumulated by the device, stop the frequency generator.
9. Once the device's input pulse buffer is empty, record the device's unconverted volume on the inspection worksheet.
10. Calculate the device's accumulated unconverted volume as shown in step 6 of 10.4.1, and record the result on the inspection worksheet.

11. Calculate the conventional true value of the simulated unconverted volume applied to the device as shown below, and record the result on the inspection worksheet.

    ${\mathrm{Vunconv}}_{\left(\mathrm{true}\right)}=\#\mathrm{ HF pulses}\times \mathrm{pulse weight}$ or

    ${\mathrm{Vunconv}}_{\left(\mathrm{true}\right)}=\frac{\#\mathrm{ HF pulses}}{\mathrm{K factor}}$

    Where,

    • Vunconv_(true) is the conventional true value of the simulated unconverted volume
    • # of HF pulses is the number of high frequency pulses applied to the device
    • Volume / pulse is the pulse weight or volume per high frequency pulse value configured in the device
    • K factor is the number of pulses per unit volume configured in the device

12. Calculate the relative error of the device's accumulated unconverted volume as shown below, and record the result on the inspection worksheet.

    $\mathrm{Relative error}=\frac{{\mathrm{Vunconv}}_{\left(\mathrm{DUT}\right)}-{\mathrm{Vunconv}}_{\left(\mathrm{true}\right)}}{{\mathrm{Vunconv}}_{\left(\mathrm{true}\right)}}\times 100\%$

13. Assess the test results for conformance with the performance requirement specified in subsection 9.4.1 of S-G-08, and record the conformance status on the inspection worksheet.

10.4.4 High frequency pulses (dual input signals)

This subsection provides instructions for testing the performance accuracy of EVC devices capable of detecting and processing the high frequency pulse signals from a Sensus Auto-Adjust^® turbine meter's main rotor and sensing rotor. These EVC devices calculate an adjusted volume and a Δ A value, which represents the deviation of the meter's current volume adjustment from its average relative adjustment : Ā established at the time its flow calibration.

1. Connect a high frequency pulse generator to each of the EVC device's high frequency pulse input terminals. If the generators do not include a counter, connect compatible pulse counters between each generator and the device's high frequency input terminals.

   Note: The pulse generators' output signal must be compatible with the type of pulse input signal that the device is constructed and/or configured to detect and process.

2. Configure the pulse generators to apply the main rotor and sensing rotor frequencies given in Table 2 for the type of sensor specified by the device owner. If the type of sensor is not specified by the owner, use the frequencies given for a slot sensor.

   Table 2: Test parameters for Sensus Auto-Adjust® turbine meter

   Test parameter	Slot sensor	Blade tip sensor
   Main rotor frequency (Hz)	686	2100
   Sensing rotor frequency (Hz)	69	210
   Km (pulses/ft³)	45
   Ks (pulses/ft³)	60
   Ā	8.000
   Kmo (pulses/ft³)	48.6

3. Record the device's configured values for each input signal's number of pulses per unit volume on the inspection worksheet. If the device has not been configured with these values, request assistance to configure it with the Km and Ks values given in Table 2.
4. Confirm that the device's input pulse buffers are empty (i.e. no stored pulses are still being processed).
5. Record the device's adjusted volume and unconverted volume, if registered separately, on the inspection worksheet.
6. Zero each pulse counter.
7. Start the pulse generators simultaneously and adjust each frequency as needed during the test.
8. When sufficient volume has been accumulated by the device, stop the pulse generators simultaneously.
9. Once the device's input pulse buffers are empty, record its unconverted volume on the inspection worksheet.
10. Calculate the adjusted and unconverted volume accumulated by the device as shown in step 6 of 10.4.1, and record the result on the inspection worksheet.
11. If the device is configured to calculate the adjusted volume using both the main rotor and sensing rotor frequency signals, calculate the conventional true value of the simulated unconverted volume (i.e. the adjusted volume) applied to the device as shown below, and record the result on the inspection worksheet.

    ${\mathrm{Vadj}}_{\left(\mathrm{true}\right)}=\frac{\mathrm{Pm}}{\mathrm{Km}}-\frac{\mathrm{Ps}}{\mathrm{Ks}}$

    Where,

    • Vadj_(true) is the conventional true value of the simulated adjusted volume
    • Pm is the number of main rotor pulses
    • Ps is the number of sensing rotor pulses
    • Km is the number pulses per unit volume for the frequency signal of the main rotor configured in the device
    • Ks is the number of pulses per unit volume for the frequency signal of the sensing rotor configured in the device
12. If the device is configured to calculate the unconverted volume using the main rotor's frequency signal and a ΔA value using both the main rotor and sensing rotor frequency signals, calculate the conventional true value of the simulated unconverted volume applied to the device as shown below, and record the result on the inspection worksheet.

    ${\mathrm{Vunconv}}_{\left(\mathrm{true}\right)}=\frac{\mathrm{Pm}}{\mathrm{Kmo}}$

    Where,

    • Pm is the number of main rotor pulses
    • Kmo is the mechanical output factor (i.e. number of pulses per unit volume)
13. Calculate the relative error of the device's accumulated unconverted volume as shown in step 12 of 10.4.3, and record the result on the inspection worksheet.
14. Assess the test results for conformance with the performance requirement specified in subsection 9.4.1 of S-G-08, and record the conformance status on the inspection worksheet.

10.4.5 Detection of impeller shaft revolutions

1. Insert the EVC device's proximity sensor (e.g. Wiegand sensor) into the rotary meter volume simulator's magnetic coupling.
2. Set up the rotary meter volume simulator for testing based on the make, model and size of the rotary meter configured for use with the EVC device (i.e. module).
3. Reset the device's unconverted volume to zero. If this is not an option, record its reading on the inspection worksheet.
4. Apply volumetric input to the device at a rate not exceeding the device's maximum approved value or the manufacturer's maximum specified value.

   Note: If necessary, calculate the maximum input rate based on the flow rate capacity and volume displacement of the rotary meter configured for use with the device as shown below.
   $\mathrm{Revs per }\mathrm{minute}\left(\mathrm{rpm}\right)=\frac{\mathrm{flow rate capacity}\left(\raisebox{1ex}{${\mathrm{ft}}^3$}\!\left/ \!\raisebox{-1ex}{$h$}\right.\right)}{\mathrm{volume displacement}\left(\raisebox{1ex}{${\mathrm{ft}}^3$}\!\left/ \!\raisebox{-1ex}{$\mathrm{rev}$}\right.\right)}\times 60\left(\raisebox{1ex}{$\sec $}\!\left/ \!\raisebox{-1ex}{$min$}\right.\right)$

5. When sufficient volume has been accumulated by the device, stop the rotary meter volume simulator.
6. Record the device's unconverted volume on the inspection worksheet.
7. Calculate the unconverted volume accumulated by the device as shown in step 6 of 10.4.1, and record the result on the inspection worksheet.

8. Calculate the conventional true value of the simulated unconverted volume applied to the device as shown below, and record the result on the inspection worksheet.

   ${\mathrm{Vunconv}}_{\left(\mathrm{true}\right)}=\#\mathrm{ of revs}\times \mathrm{Vdisp}$

   • # of revs is the number of simulated impeller shaft revolutions applied to the device
   • Vdisp is the displacement volume of the rotary meter for which the device is configured

9. Calculate the relative error of the device's accumulated unconverted volume as shown in step 12 of 10.4.3, and record the result on the inspection worksheet.

   Note: A rotary meter volume simulator authorized by MC to be used for the verification and/or reverification of EVC modules will often perform the calculations shown in steps 8 and 9.

10. Assess the test result for conformance with the performance requirement specified in subsection 9.4.1 of S-G-08, and record the conformance status on the inspection worksheet.

10.5 Pressure multiplier

Consult the completed performance test plan to determine the applicability of this subsection.

1. Where applicable, test the performance accuracy of the device or function's actual or apparent pressure multiplier in accordance with the requirements of subsection 9.3.7 of S-G-08 and steps 2 to 11 below.
2. Connect a pressure standard and pressure source (as needed) to the EVC device or function using an appropriately rated pressure hose and fittings.
3. Refer to the applicable test points specified in Table 1 of S-G-08.

4. Calculate the applicable test pressures in accordance with the requirements specified in 9.3.7(c) of S-G-08.

   Example: EVC device with an approved pressure range of 10 to 50 psia:
   $\mathrm{Test pressure}=(\frac{\mathrm{test point}}{100}\times (P_{max}-P_{min})+P_{min})\pm \left(0.02\times (P_{max}-P_{min})\right)$
   $P\mathrm{1 }\mathrm{test pressure}=(\frac{20}{100}\times \left(50-10\right)+10)\pm \left(0.02\times \left(50-10\right)\right)=18\pm \mathrm{0.8 }\mathrm{psia}$
   $P\mathrm{2 }\mathrm{test pressure}=(\frac{50}{100}\times \left(50-10\right)+10)\pm \left(0.02\times \left(50-10\right)\right)=30\pm \mathrm{0.8 }\mathrm{psia}$
   $P\mathrm{3 }\mathrm{test pressure}=(\frac{80}{100}\times \left(50-10\right)+10)\pm \left(0.02\times \left(50-10\right)\right)=42\pm \mathrm{0.8 }\mathrm{psia}$

5. Apply the applicable test pressure to the pressure standard and the device or function.
6. Access the device or function's live pressure multiplier reading or live pressure reading.

7. Once the readings of the pressure standard and the device or function have stabilized, record the device or function's pressure multiplier on the inspection worksheet or, where applicable, calculate its apparent pressure multiplier as shown below, and record the result on the inspection worksheet.

   $\mathrm{Apparent Pm}=\frac{{\mathrm{Pg}}_{\left(\mathrm{DUT}\right)}+\mathrm{Pa}}{\mathrm{Pb}}\mathrm{ or apparent Pm}=\frac{{\mathrm{Pabs}}_{\left(\mathrm{DUT}\right)}}{\mathrm{Pb}}$

   Where,

   • Pg_(DUT) is the gauge pressure indicated by the device or function under test
   • Pa is the atmospheric pressure configured in the device or function
   • Pabs_(DUT) is the atmospheric pressure indicated by the device or function under test
   • Pb is the base pressure configured in the device or function

   Note: The test result will not be valid if the stability of the applied pressure does not satisfy the requirement specified in subsection 9.3.2.b of S-G-08.

8. Calculate the conventional true value of the pressure multiplier as shown below, and record the result on the inspection worksheet.

   $\mathrm{True Pm}=\frac{{\mathrm{Pg}}_{\left(\mathrm{true}\right)}+\mathrm{Pa}}{\mathrm{Pb}}\mathrm{ or true Pm}=\frac{{\mathrm{Pabs}}_{\left(\mathrm{true}\right)}}{\mathrm{Pb}}$

   Where,

   • Pg_(true) is the gauge pressure indicated by the pressure standard
   • Pa is the atmospheric pressure configured in the device or function
   • Pabs_(true) is the atmospheric pressure indicated by the pressure standard
   • Pb is the base pressure configured in the device or function

9. Calculate the relative error of the device or function's pressure multiplier or apparent pressure multiplier as shown below, and record the result on the inspection worksheet.

   $\mathrm{Relative error}=\frac{\mathrm{Actual or apparent }{\mathrm{Pm}}_{\left(\mathrm{DUT}\right)}-{\mathrm{Pm}}_{\left(\mathrm{true}\right)}}{{\mathrm{Pm}}_{\left(\mathrm{true}\right)}}\times 100\%$

10. Repeat steps 5 to 9 inclusive for each additional test pressure.
11. Assess the test results for conformance with the performance requirement specified in subsection 9.4.2 of S-G-08, and record the conformance status on the inspection worksheet.

10.6 Temperature multiplier

Consult the completed performance test plan to determine the applicability of this subsection.

1. Where applicable, test the performance accuracy of the device or function's actual or apparent temperature multiplier or its temperature, in accordance with the test plan, the requirements of subsection 9.3.8 of S‑G‑08 and steps 2 to 10 below.
2. If the device owner or contractor has opted for testing at three temperatures, the applicable test points are as specified in Table 2 of S-G-08. For testing at a single temperature, the applicable test point is as specified by the device owner or contractor, provided it is between the T1 and T3 test points specified in Table 2.
3. Set the temperature bath to the applicable test point and insert the temperature standard and device's sensor probes. If using a liquid bath, ensure the probes are sufficiently immersed and in close proximity to each other.
4. Access the device or function's live temperature multiplier or live temperature reading, as applicable.
5. Once the readings of the temperature standard and the device or function have stabilized, conduct the test as indicated below in item a or b, as applicable.

   1. Record the device or function's temperature multiplier on the inspection worksheet, or calculate its apparent temperature multiplier using the applicable equation below, and record the result on the inspection worksheet:

      $\mathrm{Apparent Tm}=\frac{459.67+\mathrm{Tb}}{459.67+T_{\left(\mathrm{DUT}\right)}}\left(\mathrm{Imperial system of units}\right)\mathrm{, or}$

      $\mathrm{Apparent Tm}=\frac{273.15+\mathrm{Tb}}{273.15+T_{\left(\mathrm{DUT}\right)}}\left(\mathrm{International system of units}\right)$

      Where,

      • Tb is the base temperature configured in the device or function under test
      • T_(DUT)is the temperature indicated by the device or function under test
   2. Record the device or function's temperature on the inspection worksheet.

      • Note:

        The test result will not be valid if the stability of the applied temperature does not satisfy the requirement specified in 9.3.2 of S-G-08.

        Complete steps 6 and 7 only if testing the temperature multiplier or apparent temperature multiplier and complete step 8 only if testing the temperature.

6. As applicable, calculate the conventional true value of the temperature multiplier as shown below, and record the result on the inspection worksheet.

   $\mathrm{True Tm}=\frac{459.67+\mathrm{Tb}}{459.67+T_{\left(\mathrm{true}\right)}}\left(\mathrm{Imperial system of units}\right)\mathrm{, }\mathrm{or}$

   $\mathrm{True Tm}=\frac{273.15+\mathrm{Tb}}{273.15+T_{\left(\mathrm{true}\right)}}\left(\mathrm{International system of units}\right)$

   Where,

   • Tb is the base temperature configured in the device or function under test
   • T_(true) is the temperature indicated by the temperature standard

7. As applicable, calculate the relative error of the device or function's actual or apparent temperature multiplier using the equation below, and record the result on the inspection worksheet.

   $\mathrm{Relative error}=\frac{\mathrm{Actual or apparent }{\mathrm{Tm}}_{\left(\mathrm{DUT}\right)}- T{m}_{\left(\mathrm{true}\right)}}{T_{\left(\mathrm{true}\right)}}\times 100\%$

8. As applicable, calculate the absolute error of the device or function's temperature using the equation below, and record the result on the inspection worksheet.

   $\mathrm{Absolute error}=T_{\left(\mathrm{DUT}\right)}-T_{\left(\mathrm{true}\right)}$

   Where,

   • T_(DUT) is the temperature indicated by the device or function under test
   • T_(true) is the conventional true temperature indicated by the temperature standard
9. Repeat steps 3 to 8 for each additional test point, as required.
10. Assess the test results for conformance with the applicable performance requirement specified in subsection 9.4.3 of S-G-08, and record the conformance status on the inspection worksheet.

10.7 Supercompressibility correction function

Consult the completed performance test plan to determine the applicability of this subsection.

1. Where applicable, test the performance accuracy of the device or function's Fpv² or the square of its Fpv, in accordance with the test plan, the requirements specified in 9.3.9 of S-G-08 and steps 2 to 12 below.
2. Connect a pressure standard and pressure source (as needed) to the EVC device or function using an appropriately rated pressure hose and fittings.
3. The pressure and temperature test point combinations are as specified in Table 3 of S-G-08.
4. The applicable test pressures should have already been calculated in step 4 of subsection 10.5.
5. Set the temperature bath to the applicable test point and insert the temperature standard and device's sensor probes. If using a liquid bath, ensure the probes are sufficiently immersed and in close proximity to each other.
6. Apply the applicable test pressure to the pressure standard and the device or function.
7. Access the device or function's live pressure and temperature simultaneously, if possible, or separately if needed.
8. Once the readings of the device or function and both standards have stabilized, access the device or function's Fpv² or Fpv and record it on the inspection worksheet.

   Note: The test result will not be valid if the stability of the applied pressure and temperature does not satisfy the requirement specified in 9.3.2 of S-G-08.

9. Calculate the conventional true value of the Fpv² using the following information, and record the result on the inspection worksheet:
   • A software application authorized for use by MC,
   • The same standard and method of calculation used by the device or function,
   • The pressure and temperature indicated by the reference standards, and
   • The device or function's configured gas composition, relative density (as applicable), base pressure and base temperature.

10. Calculate the relative error of the device or function's Fpv² or the Fpv as shown below, and record the result on the inspection worksheet.

    $\mathrm{Relative error}=\frac{{\mathrm{Fpv}}_{\left(\mathrm{DUT}\right)}^2-{\mathrm{Fpv}}_{\left(\mathrm{true}\right)}^2}{{\mathrm{Fpv}}_{\left(\mathrm{true}\right)}^2}\times 100\%$

    $\mathrm{Relative error}=\frac{{{\mathrm{Fpv}}_{\left(\mathrm{DUT}\right)}}^2-{\mathrm{Fpv}}_{\left(\mathrm{true}\right)}^2}{{\mathrm{Fpv}}_{\left(\mathrm{true}\right)}^2}\times 100\%$

    Where,

    • Fpv²_(DUT) is the supercompressibility factor squared indicated by the device or function under test
    • Fpv_(DUT)² is the square of the supercompressibility factor indicated by the device or function under test
    • Fpv²_(true) is the conventional true value of the supercompressibility factor squared
11. Repeat steps 5 to 10 inclusive for each additional test point combination, as required.
12. Assess the test results for conformity with the applicable performance requirement specified in subsection 9.4.4 of S-G-08, and record the conformance status on the inspection worksheet.

10.8 Volume conversion function

Consult the completed performance test plan to determine the applicability of this subsection.

Note: If the device or function is approved with a volume to energy conversion function, it should be tested simultaneously with test number 1 of the volume conversion function.

1. Where applicable, test the performance accuracy of the device or function's volume conversion function in accordance with the test plan, the requirements in subsection 9.3.10 of S-G-08 and steps 2 to 19 below.
2. Consult the test plan to confirm the required number of tests of the volume conversion function and whether Table 4 or Table 5 of S-G-08 applies.
3. Calculate the specified test pressures in accordance with 9.3.7(c) of S-G-08, as needed.
4. Set the temperature bath to the applicable test point and insert the probes for the temperature standard and the device or function under test, as applicable. If using a liquid bath, ensure the probes are sufficiently immersed and in close proximity to each other.
5. Apply the specified test pressure to the working standard and the device or function, as applicable.
6. Prepare the device or function to receive simulated volumetric input.

7. Record the device or function's unconverted and converted volume readings on the inspection worksheet.

   Note: The ideal point to start a test is with the volume readings zeroed or immediately following an update of the device's converted volume reading.

8. Access the device or function's live pressure and/or temperature readings (as applicable) simultaneously, if possible, or separately if needed.
9. Once the pressure and/or temperature readings of the device or function and standards have stabilized, begin the test by applying unconverted volumetric input.
10. Ensure the rate of volumetric input does not exceed the maximum value indicated in the device's NOA or specified by the manufacturer.

11. Monitor and maintain the applicable pressure and/or temperature inputs throughout the test, as applicable.

    Note: The test result will not be valid if the stability of the applied pressure and/or temperature does not satisfy the requirement specified in 9.3.2 of S-G-08.

12. When the resolution requirement specified in 9.3.3 of S-G-08 is met, terminate the volumetric input.

    Note: The ideal point to end a test is immediately following an update of the device or function's converted volume.

13. Record the device or function's unconverted and converted volume readings on the inspection worksheet.
14. Calculate the device or function's accumulated unconverted volume and converted volume, and record them on the inspection worksheet.
15. Calculate the conventional true value of accumulated converted volume, in relation to the device or function's accumulated unconverted volume, using the applicable equation in Table 3.

    Table 3: Calculation of conventional true value of converted volume

    Conversion type	Converted volume equation
    Pressure only	$\mathrm{V conv}={\mathrm{V unconv}}_{\left(\mathrm{DUT}\right)}\times \mathrm{Pm}$
    Temperature only	$\mathrm{V conv}={\mathrm{V unconv}}_{\left(\mathrm{DUT}\right)}\times \mathrm{Tm}$
    Temperature only with fixed pressure multiplier	$\mathrm{V conv}={\mathrm{V unconv}}_{\left(\mathrm{DUT}\right)}\times {\mathrm{Pm}}_{(ϝ)}\times \mathrm{Tm}$
    Pressure and temperature	$\mathrm{V conv}={\mathrm{V unconv}}_{\left(\mathrm{DUT}\right)}\times \mathrm{Pm}\times \mathrm{Tm}$
    Pressure, temperature and supercompressibility	$\mathrm{V conv}={\mathrm{V unconv}}_{\left(\mathrm{DUT}\right)}\times \mathrm{Pm}\times \mathrm{Tm}\times {\mathrm{Fpv}}^2$

    Where,

    • Vunconv_(DUT) is the unconverted volume accumulated by the device or function under test
    • Pm is the conventional true value of the pressure multiplier, calculated as shown in step 8 of 10.5
    • Tm is the conventional true value of the temperature multiplier, calculated as shown in step 6 of 10.6
    • Pm_(f) is the fixed pressure multiplier configured in the device or function
    • Fpv² is the conventional true value of the supercompressibility factor squared, calculated as shown in step 9 of 10.7

16. Calculate the relative error of the device or function's accumulated converted volume as shown below, and record the result on the inspection worksheet.

    $\mathrm{Relative error}=\frac{{\mathrm{V conv}}_{\left(\mathrm{DUT}\right)}-{\mathrm{V conv}}_{\left(\mathrm{true}\right)}}{{\mathrm{V conv}}_{\left(\mathrm{true}\right)}}\times 100\%$

17. Repeat steps 4 to 16 for each additional volume conversion test, as required.
18. Assess the volume conversion function's test results for conformance with the applicable performance requirement specified in 9.4.5(a) of S-G-08, and record the conformance status on the inspection worksheet.
19. Where an EVC device or function of the pressure and temperature only conversion type is tested in accordance with subsections 10.5 and 10.6 of this procedure, assess its conformity with the applicable performance requirement specified in 9.4.5(b) of S-G-08, and record the conformance status on the inspection worksheet.

10.9 Volume to energy conversion function

Consult the completed performance test plan to determine the applicability of this subsection.

Note: The test in this subsection is to be conducted simultaneously with test number 1 for the device or function's volume conversion function.

1. Where applicable, test the performance accuracy of the device or function's volume to energy conversion function in accordance with the test plan, the requirements in 9.3.11 of S-G-08 and steps 2 to 10 below.
2. Record the device or function's energy reading on the inspection worksheet.

   Note: The ideal point to start a test is with the energy reading zeroed or immediately following an update of the device's energy reading.

3. When the resolution requirement specified in 9.3.3 of S-G-08 is met, terminate the volumetric input.

   Note: The ideal point to end a test is immediately following an update of the device or function's energy reading.

4. Record the device or function's energy reading on the inspection worksheet.
5. Calculate the device or function's accumulated energy and record this value on the inspection worksheet.
6. If the device or function is configured with a fixed calorific value, use this as the conventional true value.
7. If the device or function is configured to calculate a calorific value, calculate the conventional true value of the calorific value using a software application authorized for use by MC and the device or function's:
   • configured standard and method of calculation (e.g. GPA 2172),
   • gas composition parameters,
   • base pressure,
   • base temperature, and
   • units of measure.

8. Calculate the conventional true value of accumulated energy as shown below, and record the result on the inspection worksheet.

   $E_{\left(\mathrm{true}\right)}={\mathrm{V conv}}_{\left(\mathrm{DUT}\right)}\times {\mathrm{CV}}_{\left(\mathrm{true}\right)}\times \mathrm{CF}$

   Where,

   • Vconv_(DUT) is the accumulated base (i.e. converted) volume indicated by the device or function
   • CV_(true) is the conventional true value of the calorific value
   • CF is a conversion factor used to account for any difference between the device or function's base conditions for its converted volume and the volumetric component of its fixed or calculated calorific value

   Note: When a device or function is configured with a fixed calorific value, the base pressure and temperature for its volumetric component may not be evident. If a calorific value in Imperial units of measure is configured, its British thermal unit (BTU) reference (e.g. BTU(60.5)/ft³, BTU(IT)/ft³) may not be evident. In such cases, inspection for compliance with the use requirements of S-G-08 would include an assessment of the units of measure and traceability of the calorific value configured in the EVC device or function.

9. Calculate the relative error of the device or function's base volume to energy conversion as shown below, and record the test result on the inspection worksheet.

   $\mathrm{Relative error}=\frac{E_{\left(\mathrm{DUT}\right)}-E_{\left(\mathrm{true}\right)}}{E_{\left(\mathrm{true}\right)}}\times 100\%$

   Where,

   • E_(DUT) is the accumulated energy indicated by the device or function under test
   • E_(true) is the conventional true value of accumulated energy

10. Calculate the relative error of the device or function's unconverted volume to energy conversion as shown below, and record the test result on the inspection worksheet.

    $\mathrm{Relative error}=\mathrm{Relative error }\left(E_{\left(\mathrm{DUT}\right)}\right)+\mathrm{relative error }({\mathrm{Vconv}}_{\left(\mathrm{DUT}\right)}\mathrm{for test no}.1)$

11. Assess the result for conformance with the applicable performance requirement specified in subsection 9.4.6 of S-G-08, and record the conformance status on the inspection worksheet.

11.0 Sealing

Refer to S-G-08 for the sealing requirements for conforming EVC devices or gas flow meters with a built‑in EVC function.

12.0 Inspection certificate

Complete and issue an inspection certificate in accordance with the requirements of S-G-08 and GEN-27.

13.0 Fees

Charge the applicable fees for the inspection of each device or function at a location other than the operational location, as established in Schedule 1, Part IV of the Electricity and Gas Inspection Regulations.

14.0 Nonconformity and defect reporting

Report details of any nonconformity or defects identified during the inspection to the regional gas specialist for review and follow-up.

15.0 Revision

The purpose of revision 1 was to remove the reference to GEN-17—Interpretation of the Schedule of Fees because it has been repealed and all future service fees and charging practices will comply with the Service Fees Act and the fee schedules listed in the Weights and Measures Regulations and the Electricity and Gas Inspection Regulations.

Appendix: Performance test plan for an electronic volume conversion device or function

1. Which of the following applies?
   • Electronic volume conversion (EVC) device independent of a volumetric gas flow meter
   • EVC function built into a volumetric gas flow meter
   • EVC device integrally sealed to a volumetric gas flow meter
2. Does subsection 9.3.6 (Unconverted volume registration) of S-G-08 apply?
   • Yes
   • No

   If yes, what type of volumetric input is detected by the EVC device?

   • Instrument drive
   • Low frequency pulses
   • High frequency pulses (single input signal)
   • High frequency pulses (dual input signals)
   • Wiegand sensor
3. What is the device or function's conversion type?
   • Pressure only
   • Temperature only
   • Temperature with fixed Pm
   • Pressure and temperature
   • Pressure, temperature and supercompressibility
4. Does subsection 9.3.7 (Pressure Multiplier) of S-G-08 apply?
   • Yes
   • No

   If yes, what is being tested? □ Pm □ Apparent Pm

   • Pm
   • Pm apparent
5. Does subsection 9.3.8 (Temperature Multiplier) of S-G-08 apply?
   • Yes
   • No

   If yes:

   What is being tested?

   • Tm
   • Apparent Tm
   • T (for temperature only conversion type)

   Which testing is being done?

   • Single temperature testing
   • Three temperature testing (T1, T2 and T3)
6. Does subsection 9.3.9 (Supercompressibility Correction Function) of S-G-08 apply?
   • Yes
   • No

   If yes:

   What is being tested?

   • Fpv²
   • Square of Fpv

   Which standard and method are used?

   • AGA8 detailed method
   • AGA8 GCN
   • NX-19

   At which test point combination(s) will the test be conducted?

   • Single test point combination (i.e. P3 and T3)
   • All test point combinations
7. Does subsection 9.3.10 (Volume Conversion Function) of S-G-08 apply?
   • Yes
   • No

   If yes:

   Which table applies?

   • Table 4 (P only conversion type and three temperature testing)
   • Table 5 (single temperature testing)

   Which test applies?

   • Test no. 1 only
   • All tests

   How does the EVC device calculate Fpv²?

   • N/A
   • NX-19
   • AGA8 detailed method
   • AGA8 GCN
   • Other (specify)
8. Does subsection 9.3.11 (Volume to energy conversion) of S-G-08 apply?
   • Yes
   • No

   If yes, which of the following applies:

   • The EVC function or device is configured to apply a fixed calorific value
   • The EVC function or device is configured to calculate a calorific value

   Which standard is used to calculate the calorific value?

   • N/A
   • GPA 2172
   • Other (specify)