R46/2012-A-NL1-21.10 Rev. 1
OIML Certificate
OIML Member State The Netherlands
Number R46/2012-A-NL1-21.10 Revision 1
Project number 4037442
Page 1 of 3
Issuing authority Person responsible:
NMi Certin B.V. M.Ph.D. Schmidt
Applicant and Manufacturer
MEMF ELECTRICAL INDUSTRIES CO.
New Industrial Area Stage 3, Street 179
PO box: 3 55989 11383
Riyadh
Saudi Arabia
Identification of the certified type
An Active electrical energy meter Type: S33U18 (6A)
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 46-1/-2 (2012) "Active electrical energy meters"
Accuracy class
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 11 December 2025
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
OIML Member State The Netherlands
Number R46/2012-A-NL1-21.10 Revision 1
Project number 4037442
Page 2 of 3
The conformity was established by the results of tests and examinations provided in the associated report(s):
No. NMi-2534035-01 dated 14 January 2021 that includes 56 pages.
No. NMi-2534035-02 dated 14 January 2021 that includes 56 pages.
No. NMi-2507261-01 dated 14 January 2021 that includes 58 pages
No. NMi-2560627-01 dated 22 March 2021 that includes 11 pages.
No. NMi-4037442-01 dated 11 December 2025 that includes 10 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. R46-2012-A-NL1-21.10-1.
Table 1 General characteristics
| General characteristics | |
| Meter type | static |
| Connection mode(phase, wires, elements) | 3p,3w,2e |
| Direction of energy flow/registers | Two-registers,bi-directional. |
| Terminal arrangement | DIN |
| Protective class | Category2 |
| Environmental application | |
| Ambient temperature range | -10℃to+75℃(3k7) *Meter typeS34U18(6A)is tested at+75℃as per customer request |
| Humidity class | H1 |
| IP Rating/environmental use | IP54 |
| Meter quantities | |
| Nominal voltage($U_{nom}$) | 3x110V |
| Nominal frequency($f_{nom}$) | 60Hz |
| Maximum current($I_{max}$) | 6A |
| Transitional current($I_{tr}$) | 0,075A |
| Minimum current($I_{min}$) | 0,015A |
| Starting current($I_{st}$) | 0,0015A |
| Meter constant | 10.000imp./kWh |
OIML Certificate
OIML Member State The Netherlands
Number R46/2012-A-NL1-21.10 Revision 1
Project number 4037442
Page 3 of 3
| Product version | |
| Hardware version | S33U18 S09.Y1.J1 |
| Software identification | V1.00.08 Checksum:6E3955D7 |
The measuring instrument is produced at the following production location:
Production location
MEMF ELECTRICAL INDUSTRIES CO.
New Industrial Area Stage 3, Street 179
PO box: 3 55989 11383
Riyadh
Saudi Arabia
Certificate history:
This revision replaces the previous version.
| Revision | Date | Description of the modification |
| 0 | 22-03-2021 | -First issue |
| 1 | 11-12-2025 | -Addition of RS458 communication Port -Change of the supplier of the components: -EEPROM Module -Flash Module -Optocoupler |