# Metering Blog

Here we are publishing answers on your questions related to electrical energy and metering. If you have questions, please use our contact form or write a comment below the related article.
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## 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 disk. This test output gives ...

## 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. ...

## The different current subscripts

Together with tender documents and meter specifications you will find various subscripts related to current. current I without subscriptThis is the actual current flowing trough the energy meter.starting current IstThis is the lowest value of ...

## 12 Replies to “Metering Blog”

1. Steve says:

I have a clou meter token and am just wondering how i can silence the beeping alarm that goes off when your are low on tokens. Its kinda annoying. Ypur help will be highly appreciated.
Regards,
Steve

1. LaoRen says:

Steve, try code 812 on your UIU (user interface unit) and confirm by pressing the enter-button (blue or red). If it doesn’t work, please tell us the meter model type.

2. patricia says:

How can someone test reactive energy kvarh in a meter test bench?

1. LaoRen says:

If the energy meter has a function for measuring reactive energy, it must have a test output (a flashing diode) indicating the reactive consumption. This test output has a meter constant, indicated in e.g. pulses per kvarh. You set measurement mode in your test plan to reactive measurement and adjust the scanning heads in front of the reactive diode. All other procedure is the same like active accuracy test. The settings for reactive power is done inside the test bench and reference standard automatically.

3. patricia says:

which is the standard to be used for testing of for Reactive power in energy meter and what are the acceptable error margins?

1. LaoRen says:

The IEC 62053-23 is applicable for static meters for reactive energy (classes 2 and 3). The allowed errors for accuracy are given in the related tables. If you have a meter with reactive class 2, the allowed error is +/-2% for all balanced loads above 0.1 Ib and power-factor 1.

4. Aaron says:

My CLOU (CL710K11) just shows zeros when I try to enquire balance or input new token, I think it is not communicating with the power source

1. Vivian Sun says:

The possible reason could be long communicate distance or the power cable quality,plsase use another socket and try again. if still doesn’t work,pls confirm whether the UIU address is right one( enter 1593570 plus the meter number to set the UIU address).

5. Titus P. Conrad says:

Where can I find the operational manual for clou meter, with series number CL710K11

1. LaoRen says:

Thank you for your message. The operation manual is for the power company or utility. End users get an introduction by the power company and a reference card with the user interface short codes. The configuration for each power company is different. If you are in doubt about a function, ask your power supplier.

2. Emerson says:

My CL710K11 meter
Red light is lit next to the word “WIRING” and I noticed low power in house today. Any idea what could be the problem.

1. LaoRen says:

It indicates a poor communication between the user interface unit and the meter. One reason behind can be a very low supply voltage from the grid.