R137/2012-A-NL1-24.03 Rev. 0
OIML Certificate
OIML Member State The Netherlands
Number R137/2012-A-NL1-24.03 revision 0 Project number 3789034 Page 1 of 4
Issuing authority
NMi Certin B.V. Person responsible: M.Ph.D. Schmidt
Applicant and Manufacturer
Vemm tec Messtechnik GmbH
Gartenstrasse 20
14482 Potsdam
Germany
Identification of the certified type
A Rotary displacement gas meter
Type:
OMEGA 8
Characteristics
See following page(s)
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 1,0
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 7 May 2024
Certification Board
This document is issued under the provision that no liability is accepted and that the applicant shall indemnify third-party liability.
OIML Certificate
Number R137/2012-A-NL1-24.03 revision 0
Project number 3789034
Page 2 of 4
The conformity was established by the results of tests and examinations provided in the associated report(s):
No. NMi-12200167-01 dated 2 November 2012 that includes 49 pages;
No. NMi-12200167-02 dated 29 January 2013 that includes 56 pages;
No. NMi-SO14204809-01 dated 7 April 2015 that includes 34 pages;
No. NMi-2356380-02 dated 27 May 2022 that includes 16 pages;
No. NMi-3531005-02 dated 20 April 2023 that includes 12 pages.
Characteristics of the measuring instrument
In Table 1 the general characteristics of the measuring instrument are presented.
In Table 2 the characteristics of the family of instruments are presented.
The construction of the measuring instrument is recorded in the Documentation folder no. T12807-1.
Table 1 General characteristics
| Maximum pressure | 16 bar(g) |
| Mechanical class | M1 |
| Electromagnetic Class | Not applicable(the gas meter has no electronics) |
| Ambient temperature range | -25-+55℃;condensing humidity |
| Gas temperature range | -25-+55℃ |
| Orientation | All orientations |
| Designed for humidity conditions | Not applicable(the gas meter has no electronics) |
| Intended for the measurement of | Gas volume |
| Flow direction | Uni-directional(indicated with arrow) |
Flow rate range:
The flow rate range shall fulfill the following conditions:
| Qmax/Qmin | Qmax/Qt |
| ≥50 | ≥10 |
| ≥5and≤50 | ≥5 |
OIML Certificate
OIML Member State The Netherlands
Number R137/2012-A-NL1-24.03 revision 0 Project number 3789034
Page 3 of 4
Table 2 Essential characteristics of the family of instruments
| Nominal diameter | Type | Cyclic volume | Qmax | Qt | Qmin |
| [mm] | [dm3] | [m3/h] | [m3/h] | [m3/h] | |
| 25 | G10 | 0,177 | 16 | 1,6 | 0,4 |
| 50 | G16 | 0,210 | 25 | 2,5 | 0,5 |
| G25 | 0,283 | 40 | 2,0 | 0,5 | |
| G40 | 0,566 | 65 | 3,25 | 0,4 | |
| G65 | 0,708 | 100 | 5,0 | 0,5 | |
| 80 | G100 | 1,05 | 160 | 8,0 | 0,65 |
| G160-3 | 2,78 | 250 | 12,5 | 1,6 | |
| 100 | G160-4" | 2,78 | 250 | 12,5 | 1,6 |
| G250 | 4,20 | 400 | 20,0 | 2,0 | |
| G400-4" | 5,66 | 650 | 32,5 | 3,2 | |
| 150 | G400-6" | 10,5 | 650 | 32,5 | 4,0 |
| G650 | 15,7 | 1000 | 50,0 | 10,0 | |
| 200 | G1000 | 19,9 | 1600 | 80,0 | 16,0 |
Table 3 Verification scale interval
| Type | Number of drums | Control element | |
| Before the comma | Behind the comma | [m3] | |
| G10- G25 | 6 | 2 | 0,002 |
| G40- G400 | 7 | 1 | 0,02 |
| G650- G1000 | 8 | 0 | 0,2 |
Installation conditions:
For this rotary gas meter, no specific installation conditions are applicable.
OIML Member State The Netherlands
OIML Certificate
Number R137/2012-A-NL1-24.03 revision 0 Project number 3789034
Page 4 of 4
Certificate history:
| Revision | Date | Description of the modification |
| Initial | 07-05-2024 | Initial issue |