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6.3
Watt-hour Accuracy Testing (Verification)
EPM 2200 MULTI-FUNCTION POWER METERING SYSTEM – USER GUIDE
To be certified for revenue metering, power providers and utility companies have to verify
that the billing energy meter will perform to the stated accuracy. To confirm the meter's
performance and calibration, power providers use field test standards to ensure that the
unit's energy measurements are correct. Since the EPM 2200 is a traceable revenue meter,
it contains a utility grade test pulse that can be used to gate an accuracy standard. This is
an essential feature required of all billing grade meters.
Refer to the figure below for an example of how this test works.
Refer to Table 6-2 below for the Wh/Pulse Constant for Accuracy Testing.
FIGURE 6–4: Using the Watt-Hour Test Pulse
FIGURE 6–3: Watt-hour Test Pulse
Test Pulses
Energy Pulses
Comparator
Results
CHAPTER 6: USING THE METER
Watt-Hour
Test Pulse
Energy Standard
6–5
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