Being World-Class Energy Services Provider

Security for Optical Ports on Energy Meters

Optical ports provide local access for service engineers during installation or maintenance of energy meters. Households have physical access to their energy meter and might try to get access to...

European Accreditation

The European Accreditation Association has per country one member. This members are allowed to approve test laboratories for calibration.

Three Phase Reference Standard CL3115

The reference standard is used in energy meter test benches for high precision measurements of voltage, current, phase-shift and frequency. The accuracy class is 0.02.

What is DLMS/COSEM ?

DLMS stands for Device Language Message Specification, a generalised concept for abstract modelling of communication entities

Calculation methods for energy

We've got several questions related to the different recording methods for electrical energy meters. Here is the behaviour with different settings…

General information for wiring diagrams

CLOU follows the DIN EN 81346-2 for marking and identification of components inside of automated test equipment.

Environmental Conditions For Meter Test

Laboratory meter test equipment should operate under defined climatic conditions.

Acceptance tests for energy meters

From time to time there are some questions regarding the acceptance inspection (FAT) for energy meters. This paper is to clarify the legal and metrological matters.

The difference between adjustment and calibration

Calibration means the comparison of a unit under test with test equipment with higher accuracy.

Pulse Calculation for Stationary Test Benches

All energy meters used for billing purpose have a test output for calibration. This can be flashing diode, a pulse output at the terminal or the mark of a rotating...

Terminal wiring for electrical energy meters

In meter- or test bench descriptions you can find various expressions, all with the same meaning.

How long does a no-load test take?

When the voltage is applied with no current flowing in the current circuit, the test output of the meter shall not produce more than one pulse.