• October 27, 2023

    Don't touch anything!

    CLOUGLOBAL SMT lines

    In your utility laboratory and for your on-site workers you take of course care for a proper training on the job and especially for personal safety.

  • October 27, 2023

    The Stability of IEC Standards

    IEC Standard symbol picture

    Meter manufacturers, utility laboratories and type testing institutes have planning security until year 2025.

  • February 26, 2024

    The Critical Change Value

    Aristo Trilog slide rule

    The critical change value indicates the maximum amount of change allowed in the meter's energy registers during disturbance tests without any current flowing in the meter's current circuits.

  • October 26, 2023

    The Optical Test Output and Pulses

    r meter1

    Each electronic energy meter must have at least one optical test output. Commonly its named with flashing pulse diode or similar.

  • February 24, 2024

    Test Bench Stability of the Output Settings

    voltage amplifier CL309 U 5 seconds measurement

    In customer requests and tenders you can still find extensive requirements for the stability of the output settings.

  • December 19, 2023

    Where is the Basic Current?

    meter current range

    In the last 100 years we had a lovely Ib for direct connected meters. Now the name has changed to nominal current In.

  • March 30, 2024

    Influence of Fast Load Current Variations

    Fast Load Current Variations Test Profile 1

    The load current can vary frequently with high amplitude. The test conditions in the older versions of the IEC62052-11 have all be static…

  • November 19, 2023

    Repeatability Test for Energy Meters

    CL710K11B

    Another new test introduced by the IEC62052-11 Edition 2 is the repeatability test.

  • October 25, 2023

    Influence of Self Heating

    r DTS718 1

    We need to figure out whether the occurring internal heat is causing a temporary error drift above the allowed limits for variation.

  • January 4, 2024

    No Load Test for Energy Meters 2020

    CL3000

    With publishing of the Edition 2 of IEC62052-11 the minimum run time calculation formula has changed.

  • November 21, 2023

    Odd Harmonics in the Current Circuit

    phase fired waveform 45°

    Two more tests for odd harmonics have been added to IEC 62052-11 edition 2.

  • February 12, 2024

    The Energy Meter Register Resolution

    r CL710K16 SHORT 1

    The main purpose of an electronic energy meter is the accurate metering of the customer consumption. The meter has registers for storing the various consumption values