MI 2893 / MI 2892 / MI 2885
E-Meter recorder (MI 2892/MI 2885)
100
Channel
Channel, where Inrush occurs.
MAX
Maximal value during Inrush.
3.21
E-Meter recorder (MI 2892/MI 2885)
E-Meter recorder is used for accuracy measurements of electronic as well as mechanical (inductive)
meters. For accuracy measurements, comparison method is used. Voltage and current which flow
through the tested object is also connected to the reference Power Quality Instrument. Function is
supported on MI 2892 or MI 2885 Power Quality Instrument.
The total accuracy of the complete system depends on accuracy of voltage and current measurements,
mainly on the used current clamps. The most critical issue is current measurements. Current should be
detected by the most accurate current clamps (A 1588) or I/U transducer (A 1037) to achieve the highest
possible accuracy.
Note: Metrel suggest to use A 1398 PQA, A 1588 current clamps or A 1037 U/I transducer to achieve
the system accuracy approx. to 1%.
As reference meter Power Quality Instrument is used. 200ms measurements are accumulated during
the accuracy measurements. PQI collets pulses from the E-Meter and compare energy measured by the
PQI and energy collected by the pulses, generated from the E-Meter. Algorithms inside the PQI
compensate energy captured in the start and stop 200ms intervals related to the pulse captured from
the E-Meter.
Figure 74: E - Meter measuring accuracy comparison methods
In order to start the E-Meter accuracy procedure following steps should be followed:
1.
Connect voltage test leads and current clamps to selected test object (E-Meter). Take care about
proper connection and selection of used current clamps and range.
