- Applicant
- Zhejiang Weidu Instruments Co., Ltd.
- Issuer
- CZ1
- Issuing year
- 2025
- Status
- Valid
R137/2012-A-CZ1-25.01
| OIML Member State | OIML Certificate No. |
| Czech Republic | R137/2012-A-CZ1-25.01 |
| OIML CERTIFICATE ISSUED UNDER SCHEME A |
| OIML Issuing Authority
Name: Czech Metrology Institute
Address: Okružní 31, 638 00 Brno, Czech Republic
Person responsible: Jan Kalandra |
| Applicant
Name: Zhejiang Weidu Instrument Co., Ltd.
Address: The South side of No.1 Workshop and the South side No.2 Workshop No.17 Binhai No.3 ROAD, 325024 LongWan District, WenZhou City, Zhejiang Province, China |
| Manufacturer
Name: Zhejiang Weidu Instrument Co., Ltd.
Address: The South side of No.1 Workshop and the South side No.2 Workshop No.17 Binhai No.3 ROAD, 325024 LongWan District, WenZhou City, Zhejiang Province, China |
| Identification of the certified type (the detailed characteristics will be defined in the additional pages)
Turbine gas meter, type WTM |
| Designation of the module (if applicable)
--- |
| This OIML 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):
OIML R137 Edition (year): 2012, Including Amendment 2014
For accuracy class (if applicable): 1.0 |
| This OIML Certificate relates only to metrological and technical characteristics of the type of measuring instrument covered by the relevant OIML Recommendation identified above.
This OIML Certificate does not bestow any form of legal international approval. |
| The conformity was established by the results of tests and examinations provided in the associated OIML type evaluation report:
• No.0511-ER-P149-23 dated19.02.2025 that includes21 pages.
• Test Report No.5012-PT-A0002-25 dated18.02.2025 that includes29 pages. |
| The technical documentation relating to the identified type is contained in documentation file:
0511-UL-OP149-23
OIML Certificate History |
| Revision No. | Date | Description of the modification |
| - | 27 February 2025 | Issuing Certificate |
| | |
| | |
| | |
| Identification, signature and stamp
The OIML Issuing Authority
RNDr.Pavel Klenovský
Head of Certification Body
Date:27 February 2025 |
| Important note: Apart from the mention of the Certificate's reference number and the name of the OIML Member State in which the Certificate is 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. |
1 General information concerning the type
| Information, indicated on the instrument |
| Manufacturer's trade mark | WEIDU |
| Type designation | WTM |
| Accuracy class | 1.0 |
| Cyclic volume(if applicable) | --- |
| Minimum pressure pmin | 0 bar(g) |
| Maximum pressure pmax | 16 bar |
| Ambient temperature range | -25℃...+55℃ |
| Gas temperature range | -25℃...+55℃ |
| Base pressure(if applicable) | --- |
| Base temperature(if applicable) | --- |
| tsp(if applicable) | --- |
| Electrical power | --- |
| Identification of software | --- |
If the working pressure is higher than 4 bar, then verification of a gas meter at the appropriate higher static pressure is required.
Example of the label:
Example of the counter head:
2 Additional information concerning the type
| DN(mm) | Size G | $Q_{\max}(m^{3}/h)$ | $Q_{t}(m^{3}/h)$ | $Q_{\min}(m^{3}/h)$ | $Q_{\max}:Q_{\min}$ | $Q_{\max}:Q_{t}$ | Counter decimal places | LF(imp/m^{3}) | Pmax(bar) |
| 80 | G100 | 160 | 32 | 8 | 20.0 | 5 | 1 | 1 | 16 |
| G160 | 250 | 50 | 12.5 | 20.0 | 5 | 1 | 1 |
| G250 | 400 | 80 | 20 | 20.0 | 5 | 1 | 1 |
| 100 | G160 | 250 | 50 | 12.5 | 20.0 | 5 | 1 | 1 |
| G250 | 400 | 80 | 20 | 20.0 | 5 | 1 | 1 |
| G400 | 650 | 130 | 32 | 20.3 | 5 | 1 | 1 |
| 150 | G400 | 650 | 130 | 32 | 20.3 | 5 | 1 | 1 |
| G650 | 1000 | 200 | 50 | 20.0 | 5 | 1 | 1 |
| G1000 | 1600 | 320 | 80 | 20.0 | 5 | 1 | 1 |
| 200 | G650 | 1000 | 200 | 50 | 20.0 | 5 | 0 | 0.1 |
| G1000 | 1600 | 320 | 80 | 20.0 | 5 | 0 | 0.1 |
| G1600 | 2500 | 500 | 125 | 20.0 | 5 | 0 | 0.1 |
| DNmm) | AFlungTo Flang | width | H1 |
| B | B1 |
| 50 | 150 | 215 | 225 | 230 |
| 80 | 240 | 232 | 242 | 260 |
| 100 | 300 | 252 | 262 | 280 |
| 150 | 450 | 312 | 322 | 338 |
| 200 | 600 | 381 | 397 | 407 |
| 250 | 750 | 445 | 455 | 469 |
| 300 | 900 | 490 | 500 | 515 |
