## 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. Scan the QR-code to join our WeChat company page.

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• ### User Interface Unit UIU

The user interface unit (UIU) is a device for remote access to STS payment meters.

• ### Negative Phase Current

Electronic energy meters can have various additional useful functions for tamper protection, event logging or billing.

• ### Efficiency on Wednesdays

Our management has instructed the R&D department to come out with an automated solution. We are CLOU, so the product was finished in 20 days.

• ### Preventive Measures for Virus Control

There is an additional difference between rectal measurement and infrared measurement in the range of 0.03 °C.

• ### What is Measurement Uncertainty?

When we do high precision measurements we have to make sure that we are getting the measurement results as accurate as possible.

• ### Wrong Phase Sequence

The measurement circuit of CLOU three-phase energy meters constantly monitors transition through zero on all phase voltages.

• ### Welcome to the Year of the Rat 2020

As usual our company has rented the Shenzhen sports stadium for the annual Spring Festival Gala and Outstanding Staff Award Ceremony.

• ### What are Transient Voltages?

Transient voltages are short time peaks in the a.c. power supply. They typically last a few milliseconds and the voltage can reach several thousand volt. A transient is by definition shorter than half cycle.

• ### What is a Voltage Swell Event?

A voltage swell is a surge (increase) of voltage above 110 % of the rms magnitude in your power grid. The duration can be between ½ cycle and one minute. (EN 50160)

• ### What is a Voltage Dip Event?

Sometimes it’s also referred to voltage sag (IEEE term). The meaning is the same. This article explains the power quality event logging inside of smart meters.

• ### The First Breath Notification

The First Breath Push notification is sent to the head end system (HES) as soon as the meter is powered up.

• ### The DLMS Push Message

A electronic energy meter with communication via DLMS can be configured to send Push messages. Usually a meter acts as a server.

• ### The Last Gasp Outage Notification

Smart meters can generate a Push message in case of power fail. This event is called Last Gasp.

• ### Practical Use of Load Profiles

Electronic energy meters can save internally a lot of data. When this data are saved periodically with time stamp, we talk about a load profile.

• ### The TOU Tariff Structure

TOU stands for time of use. It’s getting popular together with smart energy meters and advanced metering infrastructure (AMI).

• ### Energy Meters and Tariffs

Electronic energy meters are recording the actual power over a certain time. The microprocessor inside of these meters allows all kind of additional calculations.

• ### Sealing of Energy Meters

Electrical Energy meters are sealed to detect possible manipulations. The utility field workers check the meter installations regular.

• ### Sealing of Optical Ports

The optical port is for local communication with energy meters. With suitable software and an optical reading head you can access to the meter for reading and writing certain parameters.

• ### Principle for Accuracy Testing of Energy Meters

Now meter testing is much more comfortable. Actually you only need to put the meters on the rack. For testing big quantities of meters a robot can also do the job. But what happens inside?

• ### Basics of Energy Meter Accuracy Tests

In the past without any electronics a accuracy test was really challenging. You needed a voltage/current source with a high stability, calibrated wattmeters and a calibrated stop-watch.

### 16 Replies to “Metering Blog”

1. Cory says:

Thank You! So much for a great blog and best of luck for the future,
I’ll be in touch.

1. Irene says:

Thank you for your interest. You can swipe down the page bottom and subscribe to our weekly newsletter.

2. Morine says:

Kindly how can I silence my meter even after dailing 812# still it will revive on its own and starts beeping its really annoying.

1. Irene says:

The beep can only switch off temporarily for just one minute.
The beep appears because there is an alarm, either low credit, or overload, or tamper.
You can silence your meter permanently after you solve the alarm.

3. 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.

4. 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.

5. 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.

6. 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).

7. 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.

3. 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.