Category: Gas
Issue date:
Effective date:
Revision number: 3
Supersedes: S-G-03 (rev. 2)
Part 6: Coriolis mass flow 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 meters which measure mass flow rate of a flowing gas.
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
2.1 Unit of measurement
The unit of measurement must be the kilogram.
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
- 2.5 Repeatability
- 2.6 Working pressure
- 2.7 Temperature
- 2.9 Vibrations and shocks
- 2.10 Orientation
- 2.11 Flow direction
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 the true mass registration must not exceed the maximum permissible errors (MPE) indicated below in Table 1.
Test conditions | Flow rate (Q) | MPE |
---|---|---|
Reference or "other than reference" |
Qmin ≤ Q ≤ Qt | ± 1.5% |
Qt ˂ Q ≤ Qmax | ± 1.0% |
4.0 Technical requirements
Notes: The following requirements of Part 1, section 3.0 apply:
- 3.1 Design, composition and construction
- 3.4 Case
- 3.5 Zero flow
- 3.6 Flow direction
- 3.7 Indication
- 3.8 Output
- 3.9 Power sources
- 3.10 Software
- 3.12 Registration
According to the characteristics of the meter, the following requirements may also apply:
- 3.2 Minimum temperature range
- 3.3 Automatic volume conversion
- 3.11 Compressibility factor
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
- (i) Qt
- (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:
- 4.4 Temperature converted volume
- 4.5 Pressure converted volume
- 4.6 Unidirectional flow measurement
- 4.7 Bidirectional flow measurement
- 4.14 Operating information
- 4.15 Ancillary devices
6.0 Sealing requirements
Notes: 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.
8.0 Performance test requirements
Note: Test conditions and performance tests can be obtained by contacting MC.