Category: Gas
Issue date:
Effective date:
Revision number: 3
Supersedes: S-G-03 (rev. 2)
Part 8: Fluidic oscillation gas meters
Table of contents
- 1.0 Scope
- 2.0 Unit requirements
- 3.0 Metrological requirements
- 4.0 Technical requirements
- 5.0 Marking requirements
- 6.0 Sealing requirements
- 7.0 Administrative requirements
- 8.0 Performance test requirements
1.0 Scope
This part of the Specifications applies to fluidic oscillation gas meters which operate by integrating gas flow through the detection of a gas jet's oscillation frequency.
2.0 Unit requirements
Note: The following requirements of Part 1, section 1.0 apply:
- 1.1 Use of units
- 1.2 Metric units of measure
- 1.3 Display of units of measure for non-trade purposes
3.0 Metrological requirements
Notes: The following requirements of Part 1, section 2.0 apply:
- 2.1 Rated operating conditions
- 2.2 Flow rate characteristics
- 2.3 Maximum permissible errors
- 2.4 Weighted mean error
- 2.6 Working pressure
- 2.7 Temperature
- 2.8 Durability
- 2.9 Vibrations and shocks
- 2.10 Orientation
- 2.11 Flow direction
- 2.12 Flow disturbance
According to the characteristics of the meter, the following requirements may also apply:
- 2.14 Different gases
- 2.15 Influences from ancillary devices
3.1 Maximum permissible errors
The error of registration must not exceed a maximum permissible error (MPE) of ± 1%.
3.2 Repeatability
The repeatability error must not exceed ± 0.2%.
4.0 Technical requirements
4.1 Pressure tap
A pressure tap must be located on the meter body.
5.0 Marking requirements
Notes: The following requirements of Part 1, section 4.0 apply:
- 4.1 Permanency and legibility
- 4.2
- (a) Departmental approval number
- (b) Manufacturer's name or registered trademark
- (c) Model or type designation
- (d) Serial number
- (e) Ambient temperature range, where less than -30 °C to 40 °C
- (f) Pmin (where applicable) and Pmax
- (g) Qmax
- (h) Qmin
- (j) Gas temperature range for which the errors ≤ MPE
- 4.9 External power supply
- 4.10 Software
- 4.12 Inspection number
- 4.13 Verification marks
According to the characteristics of the meter, the following requirements may also apply:
- 4.2
- (k) Type and range for analogue input and/or output signal
- (l) Protocol/interface for digital input and/or output
- 4.3 Bar codes or quick response codes
- 4.4 Temperature converted volume
- 4.5 Pressure converted volume
- 4.6 Unidirectional flow measurement
- 4.7 Bidirectional flow measurement
- 4.11 Connection terminals
- 4.14 Operating information
- 4.15 Ancillary devices
6.0 Sealing requirements
Note: The following requirements of Part 1, section 5.0 apply:
- 5.1 General
- 5.2 Electronic gas metering devices
7.0 Administrative requirements
Note: The requirements of Part 1, section 6.0 apply.
7.1 Notice of approval
Where it can be shown that a meter's accuracy is susceptible to flow pulsations, the notice of approval must indicate the appropriate means to use to reduce the intensity of such disturbances to a level which will not cause the meter's accuracy to exceed the MPE specified in subsection 3.1.
8.0 Performance test requirements
Note: Test conditions and performance tests can be obtained by contacting MC.