R137/2012-A-NL1-20.13 Rev. 1
OIML Certificate
OIML Member State The Netherlands
Number R137/2012-A-NL1-20.13 revision 1
Project number 2465520
Page 1 of 3
Issuing authority
Applicant and Manufacturer
NMi Certin B.V.
Person responsible: M. Boudewijns
Goldcard Smart Group Co., Ltd. No 158, Jinqiao Street, Economic and Technology development Zone Hangzhou City, P.R. China
Identification of the certified type
A Diaphragm gas meter
Type: JK/G1.6, JK/G2.5, JK/G2.5W JGML1.6F, JGML2.5F, JGML2.5WF JGD1.6-SF, JGD2.5-SF, JGD2.5W-SF JGD1.6-NF, JGD2.5-NF, JGD2.5W-NF JGD1.6-NB, JGD2.5-NB, JGD2.5W-NB JGD1.6-LR, JGD2.5-LR, JGD2.5W-LR
Characteristics
See page 2 and further
This OIML Certificate is issued under scheme A
This Certificate attests the conformity of the above identified type (represented by the sample(s) identified in the OIML Type Evaluation Report) with the requirements of the following Recommendation of the International Organization of Legal Metrology (OIML):
R 137-1 (2012) "Gas meters"
Accuracy class 1,5
This Certificate relates only to the metrological and technical characteristics of the type of measuring instrument covered by the relevant OIML International Recommendation identified above. This Certificate does not bestow any form of legal international approval.
This certificate and supporting reports comply with the requirements of OIML-CS-PD-07 clause 6.2.
Important note: Apart from the mention of the Certificate's reference number and the name of the OIML Member State in which the Certificate was issued, partial quotation of the Certificate and of the associated OIML Type Evaluation Report(s) is not permitted, although either may be reproduced in full.
Issuing Authority
NMi Certin B.V., OIML Issuing Authority NL1 4 March 2021
Certification Board
This document is issued under the provision that no liability is accepted and that the applicant shall indemnify third-party liability.
Reproduction of the complete document only is permitted.
OIML Certificate
Number R137/2012-A-NL1-20.13 revision 1 Project number 2465520 Page 2 of 3
The conformity was established by the results of tests and examinations provided in the associated reports:
No. NMi-13200784-01 dated 12 March 2015 that includes 35 pages;
No. NMi-16200632-01 dated 29 September 2016 that includes 15 pages;
No. NMi-2414972-01 dated 12 February 2020 that includes 20 pages;
No. NMi-2494544-01 dated 23 July 2020 that includes 14 pages;
No. NMi-2465520-01 dated 2 March 2021 that includes 15 pages.
Characteristics of the measuring instrument
In Table 1 the general characteristics of the measuring instrument are presented. Table 2 gives an overview of the general characteristics of the family of instruments.
Table 1 General characteristics
| Destined for the measurement of | Gas volume |
| Environmental classes | M1/E1 |
| Accuracy class | 1,5 |
| Maximum pressure | 0,5 bar |
| Ambient temperature range | -25-+55℃ |
| Gas temperature range | -25-+55℃ |
| Designed for | Condensing humidity |
| Orientation | Connection ports vertical |
| Flow direction | Left to right or right to left |
| Distance between the connections | 110 to 130mm |
OIML Certificate
OIML Member State The Netherlands
Number R137/2012-A-NL1-20.13 revision 1
Project number 2465520
Page 3 of 3
Table 2 Essential characteristics of the family of instruments
| Type | Cyclic volume[dm3] | Qmax[m3/h] | Qt[m3/h] | Qmin[m3/h] | Verification scale interval | ||
| number of drums | control element[m3] | ||||||
| before the comma | behind the comma | ||||||
| JK/G2.5W | 0,9 | 4 | 0,4 | 0,016 | 5 | 3 | 0,0002 |
| JK/G2.5 | 0,9 | 4 | 0,4 | 0,025 | 5 | 3 | 0,0002 |
| JK/G1.6 | 0,9 | 2,5 | 0,25 | 0,016 | 5 | 3 | 0,0002 |
| JGML2.5WF | 0,9 | 4 | 0,4 | 0,016 | 5 | 3 | 0,0002 |
| JGML2.5F | 0,9 | 4 | 0,4 | 0,025 | 5 | 3 | 0,0002 |
| JGML1.6F | 0,9 | 2,5 | 0,25 | 0,016 | 5 | 3 | 0,0002 |
| JGD2.5W-SF | 0,9 | 4 | 0,4 | 0,016 | 5 | 3 | 0,0002 |
| JGD2.5W-NF | 0,9 | 4 | 0,4 | 0,016 | 5 | 3 | 0,0002 |
| JGD2.5W-NB | 0,9 | 4 | 0,4 | 0,016 | 5 | 3 | 0,0002 |
| JGD2.5W-LR | 0,9 | 4 | 0,4 | 0,016 | 5 | 3 | 0,0002 |
| JGD2.5-SF | 0,9 | 4 | 0,4 | 0,025 | 5 | 3 | 0,0002 |
| JGD2.5-NF | 0,9 | 4 | 0,4 | 0,025 | 5 | 3 | 0,0002 |
| JGD2.5-NB | 0,9 | 4 | 0,4 | 0,025 | 5 | 3 | 0,0002 |
| JGD2.5-LR | 0,9 | 4 | 0,4 | 0,025 | 5 | 3 | 0,0002 |
| JGD1.6-SF | 0,9 | 2,5 | 0,25 | 0,016 | 5 | 3 | 0,0002 |
| JGD1.6-NF | 0,9 | 2,5 | 0,25 | 0,016 | 5 | 3 | 0,0002 |
| JGD1.6-NB | 0,9 | 2,5 | 0,25 | 0,016 | 5 | 3 | 0,0002 |
Certificate history:
This revision replaces the previous version.
| Revision | Date | Description of the modification |
| Initial | 23 July 2020 | - |
| 1 | 4 March 2021 | Addition of meter types with ancillary electronic index. |