šŸ”„šŸ”„ Donā€™t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

šŸ”
BS EN 12405-1:2021

BS EN 12405-1:2021

$215.11

Gas meters. Conversion devices – Volume conversion

Published By Publication Date Number of Pages
BSI 2021 128
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. Weā€™re here to assist you 24/7.
Email:[email protected]

This document specifies the requirements and tests for the construction, performance, safety and conformity of gas-volume electronic conversion devices associated to gas meters, used to measure volumes of fuel gases of the 1st and 2nd families according to EN 437 .

This document is intended for type testing, the detailed relevant provisions of which are given in Annex A.

Only three kinds of conversion are treated in this document:

  1. conversion as a function of temperature only (called T conversion);

  2. conversion as a function of the pressure and of the temperature with constant compression factor (called PT conversion);

  3. conversion as a function of the pressure, the temperature and taking into account the compression factor (called PTZ conversion).

This document is not relevant to temperature conversion integrated into gas meters which only indicate the converted volume.

Gas-volume conversion devices consist of a calculator and a temperature transducer or a calculator, a temperature transducer and a pressure transducer locally installed.

For application of this document, a conversion device may be, as a choice of the manufacturer, considered as a complete instrument (Type 1) or made of separate elements (Type 2), according to the definitions given in 3.1.20.1 and 3.1.20.2.

In this last case, the provisions concerning pressure transducers, temperature sensors and temperature transducers are given in Annexes B, C and D respectively.

Any conversion device can provide an error curve correction for a gas meter.

NOTE

When rendering an account to an end user the readings from the conversion device can be used in conjunction with the readings from a gas meter conforming to EN 1359 , EN 12480 , or EN 12261 , as appropriate, or to any other appropriate and relevant international or national standard for gas meters, without prejudice of national regulations.

PDF Catalog

PDF Pages PDF Title
2 undefined
22 1 Scope
2 Normative references
25 3 Terms, definitions and symbols
3.1 Terms and definitions
29 3.2 Symbols
31 3.3 Classification
3.3.1 Mechanical classes
3.3.2 Electromagnetic environmental classes
4 Principle of measurement
4.1 Conversion as a function of temperature
4.2 Conversion as a function of pressure and temperature
32 4.3 Conversion as a function of pressure, temperature and deviation from the ideal gas law
4.4 Correction of the volume at measurement conditions
33 5 Rated operating conditions
5.1 Specified field of measurement
5.1.1 General
5.1.2 Specified measurement range for gas pressure
5.1.3 Specified measurement range for gas temperature
5.1.4 Gas characteristics
34 5.1.5 Base conditions
5.2 Environmental conditions
5.2.1 Ambient temperature range
5.2.2 Humidity range
5.2.3 Mechanical environment
5.2.4 Electromagnetic environment
5.3 Power supply
6 Construction requirements
6.1 General
36 6.2 Casings
6.3 Indications
6.3.1 General
38 6.3.2 Electronic indicating device
6.4 Inputs for volume conversion
6.5 Battery powered conversion device
39 6.6 Security devices and alarms
40 7 Installation requirements
7.1 General
41 7.2 Temperature transducer
7.3 Pressure transducer
8 Performance
8.1 Reference conditions
42 8.2 Rated operating conditions
8.3 Maximum permissible errors
8.3.1 General
8.3.1.1 Conversion in general
8.3.1.2 Conversion devices type 1
8.3.1.3 Conversion devices type 2
43 8.3.2 Error of conversion
8.3.3 Specific errors for a gas-volume conversion device, type 2
44 8.4 Conditions of matching the constituent elements of a conversion device type 2
8.5 Influence factors
8.6 Disturbances
45 8.7 Durability
8.8 Repeatability
8.9 Reliability
9 Tests of conformity
9.1 Verification of the construction requirements
9.2 Verification of the performance requirements (type tests)
9.2.1 Test conditions
46 9.2.2 Samples of gas volume conversion device type 1 required for testing
50 9.2.3 Samples of gas volume conversion devices type 2 required for testing
9.2.4 Test report
10 Marking
51 11 Installation and operating instructions
52 Annex A (normative)Type test
A.1 General conditions
A.1.1 General
A.1.2 Additional conditions specific to gas volume conversion devices type 1
A.1.3 Additional conditions specific to gas-volume conversion devices type 2
53 A.1.4 Test procedures
A.1.4.1 Test procedure 1 (PR1)
54 A.1.4.2 Test procedure 2 (PR2)
A.1.4.3 Test procedure 3 (PR3)
A.1.4.4 Test procedure 4 (PR4)
A.1.4.5 Test procedure 5 (PR5)
A.1.5 Verification of the construction requirements
A.2 Accuracy tests under reference conditions
A.2.1 Objective
55 A.2.2 Reference to documents
A.2.3 Procedure
A.2.4 Acceptance criteria
A.3 Effect of ambient temperature
A.3.1 Objective
A.3.2 Reference to documents
A.3.3 Procedure
A.3.4 Acceptance criteria
A.4 Effect of damp heat, steady-state test
A.4.1 Objective
A.4.2 Reference to documents
A.4.3 Procedure
56 A.4.4 Acceptance criteria
A.5 Effect of damp heat, cyclic test
A.5.1 Objective
A.5.2 Reference to documents
A.5.3 Procedure
A.5.4 Acceptance criteria
57 A.6 Electrical power variation
A.6.1 Objective
A.6.2 Reference to documents
A.6.3 Procedure
A.6.4 Acceptance criteria
A.7 Short time power reductions
A.7.1 Objective
A.7.2 Reference to documents
A.7.3 Procedure
58 A.7.4 Acceptance criteria
A.8 Electrical bursts
A.8.1 Objective
A.8.2 Reference to documents
A.8.3 Procedure
A.8.4 Acceptance criteria
A.9 Electromagnetic susceptibility
A.9.1 Objective
A.9.2 Reference to documents
A.9.3 Procedure
59 A.9.4 Acceptance criteria
A.10 Electrostatic discharges
A.10.1 Objective
A.10.2 Reference to documents
A.10.3 Procedure
A.10.4 Acceptance criteria
A.11 Overload of pressure (only for type 1 and pressure transducers)
A.11.1 Objective
A.11.2 Reference to documents
A.11.3 Procedure
60 A.11.4 Acceptance criteria
A.12 Effect of vibrations
A.12.1 Objective
A.12.2 Reference to documents
A.12.3 Procedure
A.12.4 Acceptance criteria
A.13 Effect of shocks
A.13.1 Objective
A.13.2 Reference to documents
A.13.3 Procedure
61 A.13.4 Acceptance criteria
A.14 Overload of pressure (mechanical)
A.14.1 Objective
A.14.2 Reference to documents
A.14.3 Procedure
A.14.4 Acceptance criteria
A.15 Durability
A.15.1 Objective
A.15.2 Reference to documents
62 A.15.3 Procedure
A.15.4 Acceptance criteria
A.16 Alarms operation
A.16.1 Objective
A.16.2 Reference to documents
A.16.3 Procedure
A.16.4 Acceptance criteria
63 A.17 Repeatability
A.17.1 Objective
A.17.2 Reference to standards
A.17.3 Procedure
A.17.4 Acceptance criteria
A.18 Short time DC power variations
A.18.1 Objective
A.18.2 Reference to standards
A.18.3 Procedure
A.18.4 Acceptance criteria
64 A.19 Surges on supply lines and/or signal lines
A.19.1 Objective
A.19.2 Reference to standards
A.19.3 Procedure
A.19.4 Acceptance criteria
A.20 Power frequency magnetic field
A.20.1 Objective
A.20.2 Reference to standards
A.20.3 Procedure
A.20.4 Acceptance criteria
65 A.21 Functionality ā€œError curve correctionā€ of a gas meter (optional)
A.21.1 Objective
A.21.2 Reference to documents
A.21.3 Procedure
A.21.4 Acceptance criteria
66 Annex B (normative)Pressure transducers
B.1 Scope
B.2 Rated operating conditions
B.2.1 Specified measurement range for pressure
B.2.2 Environmental class
B.2.3 Power supply
B.3 Construction requirements
B.3.1 General
B.3.2 Casings
B.3.3 Indications
B.3.3.1 General
67 B.3.3.2 Electronic indicating device
B.4 Performances
B.4.1 Reference conditions
B.4.2 Rated operating conditions
B.4.3 Maximum permissible errors
B.4.4 Influence factors
B.4.5 Disturbances
B.4.6 Durability
68 B.5 Tests of conformity
B.5.1 Test conditions
B.5.2 Tests
B.5.3 Sample of pressure transducers required for testing
B.6 Marking
69 Annex C (normative)Platinum resistance thermometer sensors
C.1 Scope
C.2 Operating rated conditions
C.2.1 Specified measurement range for temperature
C.2.2 Environmental class
C.3 Construction requirements
C.4 Performances
70 C.5 Marking
C.5.1 Required markings
C.5.2 Verification mark
C.6 Metrological verifications
C.6.1 Type approval
C.6.2 Initial verification
71 C.7 Verification procedure
C.7.1 Visual inspection
C.7.2 Type testing (type approval)
C.7.3 Samples of PRT required for testing
C.7.4 Initial verification
73 Annex D (normative)Temperature transducers
D.1 Scope
D.2 Rated operating conditions
D.2.1 Specified measurement range for temperature
D.2.2 Environmental class
D.2.3 Power supply
D.3 Construction requirements
D.3.1 General
D.3.2 Casings
D.3.3 Indications
D.3.3.1 General
74 D.3.3.2 Electronic indicating device
D.4 Performances
D.4.1 Reference conditions
D.4.2 Rated operating conditions
D.4.3 Maximum permissible errors
D.4.4 Influence factors
D.4.5 Disturbances
D.4.6 Durability
75 D.5 Tests of conformity
D.5.1 Test conditions
D.5.2 Tests
D.5.3 Sample of temperature transducers required for testing
D.6 Marking
76 Annex E (informative)Model type test report for conversion devices
E.1 General
E.1.1 General remarks
E.1.2 Number of pages
E.1.3 Laboratory’s identification
E.1.4 Applicant
E.1.5 Identification of device(s) submitted for testing
E.2 Accuracy tests under reference conditions
E.2.1 Ambient temperature during the test
77 E.2.2 Test equipment used
E.2.3 Test results
78 E.3 Ambient temperature
E.3.1 Effect of dry heat
E.3.1.1 Ambient temperature during the test
E.3.1.2 Test equipment used
E.3.1.3 Test results
79 E.3.2 Effect of cold
E.3.2.1 Ambient temperature during the test
E.3.2.2 Test equipment used
E.3.2.3 Test results
80 E.4 Effect of damp heat, steady-state test
E.4.1 Ambient temperature during the test
E.4.2 Test equipment used
81 E.4.3 Test results
E.4.3.1 Before the application of the test
E.4.3.2 During the application of the test
82 E.4.3.3 After the application of the test
E.5 Effect of damp heat, cyclic test
E.5.1 Ambient temperature during the test
E.5.2 Test equipment used
E.5.3 Test results
E.5.3.1 Before the cyclic test
83 E.5.3.2 After the cyclic test
E.6 Electrical power variation
E.6.1 AC power supply
E.6.1.1 Test equipment used
E.6.1.2 Test results
85 E.6.2 DC power supply or battery supply
E.6.2.1 Test equipment used
E.6.2.2 Test results
86 E.7 Short time power reductions
E.7.1 Test equipment used
E.7.2 Test results
E.7.2.1 Before the application of the perturbation
87 E.7.2.2 During the application of the perturbation
E.7.2.3 Error shift calculation
E.8 Electrical bursts
E.8.1 Test equipment used
E.8.2 Test results
E.8.2.1 Mains power
88 E.8.2.2 In/out connections
89 E.9 Electromagnetic immunity
E.9.1 Test equipment used
E.9.2 Test results
E.9.2.1 Before the application of the perturbation
E.9.2.2 During the application of the perturbation
E.9.2.3 Error shift calculation
E.10 Electrostatic discharges
E.10.1 Test equipment used
90 E.10.2 Test results
E.10.2.1 Before the application of the perturbation
E.10.2.2 During the application of the perturbation
E.10.2.3 Error shift calculation
E.11 Effect of an overload of static pressure
E.11.1 Ambient temperature during the test
E.11.2 Test equipment used
E.11.3 Test results
E.11.3.1 Before the application of the perturbation
91 E.11.3.2 After the application of the perturbation
E.11.3.3 Error shift calculation
E.12 Effect of vibrations
E.12.1 Ambient temperature during the test
E.12.2 Test equipment used
92 E.12.3 Test results
E.12.3.1 Before the application of the test
E.12.3.2 After the application of the test
E.13 Effect of shocks
E.13.1 Ambient temperature during the test
93 E.13.2 Test equipment used
E.13.3 Test results
E.13.3.1 Before shocks
E.13.3.2 After the application of the perturbation
E.13.3.3 Error shift calculation
E.14 Mechanical resistance to overload of static pressure
E.14.1 Ambient temperature during the test
E.14.2 Test equipment used
94 E.14.3 Test results
E.15 Durability
E.15.1 Ambient temperature during the test
E.15.2 Test equipment used
E.15.3 Test equipment used
E.15.3.1 Before durability
95 E.15.3.2 After durability
96 E.15.3.3 Error shift calculation
97 E.16 Alarms operation
E.16.1 Ambient temperature during the test
E.16.2 Test equipment used
E.16.3 Test results
E.17 Repeatability
E.18 Short time DC power variations
E.18.1 Test equipment used
98 E.18.2 Test results
E.18.2.1 Before the application of the perturbation
E.18.2.2 During the application of the perturbation
E.18.2.3 Error shift calculation
E.19 Surges on supply lines and/or signal lines
E.19.1 Test equipment used
99 E.19.2 Test results
E.19.2.1 Before the application of the perturbation
E.19.2.2 After the application of the perturbation
E.19.2.3 Error shift calculation
E.20 Power frequency magnetic field
E.20.1 Test equipment used
100 E.20.2 Test results
E.20.2.1 Before the application of the perturbation
E.20.2.2 During the application of the perturbation
E.20.2.3 Error shift calculation
101 Annex F (informative)Model type test report for associated transducers
F.1 General
F.1.1 General remarks
F.1.2 Number of pages
F.1.3 Laboratory’s identification
F.1.4 Applicant
F.1.5 Identification of device(s) submitted for testing
F.2 Accuracy tests under reference conditions
F.2.1 Ambient temperature during the test
F.2.2 Test equipment used
102 F.2.3 Test results
F.3 Ambient temperature
F.3.1 Effect of dry heat
F.3.1.1 Ambient temperature during the test
103 F.3.1.2 Test equipment used
F.3.1.3 Test results
F.3.2 Effect of cold
F.3.2.1 Ambient temperature during the test
F.3.2.2 Test equipment used
104 F.3.2.3 Test results
F.4 Effect of damp heat, steady-state test
F.4.1 Ambient temperature during the test
F.4.2 Test equipment used
F.4.3 Test results
F.4.3.1 Before the application of the test
105 F.4.3.2 During the application of the test
F.4.3.3 After the application of the test
F.5 Effect of damp heat, cyclic test
F.5.1 Ambient temperature during the test
F.5.2 Test equipment used
106 F.5.3 Test results
F.5.3.1 Before the application of the test
F.5.3.2 After the cyclic test
F.6 Electrical power variation
F.6.1 AC power supply
F.6.1.1 Test equipment used
F.6.1.2 Test results
107 F.6.2 DC power supply or battery supply
F.6.2.1 Test equipment used
108 F.6.2.2 Test results
F.7 Short time power reductions
F.7.1 Ambient temperature during the test
F.7.2 Test equipment used
F.7.3 Test results
F.7.3.1 Before the application of the perturbation
F.7.3.2 During the application of the perturbation
109 F.7.3.3 Error shift calculation
F.8 Electrical bursts
F.8.1 Ambient temperature during the test
F.8.2 Test equipment used
F.8.3 Test results
F.8.3.1 Mains power
110 F.8.3.2 In/out connections
F.9 Electromagnetic immunity
F.9.1 Ambient temperature during the test
F.9.2 Test equipment used
F.9.3 Test results
F.9.3.1 Before the application of the perturbation
111 F.9.3.2 During the application of the perturbation
F.9.3.3 Error shift calculation
F.10 Electrostatic discharges
F.10.1 Ambient temperature during the test
F.10.2 Test equipment used
F.10.3 Test results
F.10.3.1 Before the application of the perturbation
F.10.3.2 During the application of the perturbation
112 F.10.3.3 Error shift calculation
F.11 Effect of an overload of static pressure
F.11.1 General
F.11.2 Ambient temperature during the test
F.11.3 Test equipment used
F.11.4 Test results
F.11.4.1 Before the application of the perturbation
113 F.11.4.2 After the application of the perturbation
F.11.4.3 Error shift calculation
F.12 Effect of vibrations
F.12.1 Ambient temperature during the test
F.12.2 Test equipment used
114 F.12.3 Test results
F.12.3.1 Before the application of the test
F.12.3.2 After the application of the test
F.13 Effect of shocks
F.13.1 Ambient temperature during the test
F.13.2 Test equipment used
115 F.13.3 Test results
F.13.3.1 Before shocks
F.13.3.2 After shocks
F.13.3.3 Error shift calculation
F.14 Mechanical resistance to overload of static pressure
F.14.1 General
F.14.2 Ambient temperature during the test
F.14.3 Test equipment used
F.14.4 Test results
116 F.15 Durability
F.15.1 Ambient temperature during the test
F.15.2 Test equipment used
F.15.3 Test results
F.15.3.1 Before durability
117 F.15.3.2 After durability
F.15.3.3 Error shift calculation
118 F.16 Repeatability
119 Annex G (normative)Individual testing before putting into service
G.1 Objective
G.2 Reference to documents
G.3 Procedure
G.4 Acceptance criteria
121 Annex ZA (informative)Relationship between this European Standard and the Essential Requirements of EU Directive 2014/32/EU Measuring Instruments Directive

Related products

BS EN 12405-1:2021
$215.11