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Using the PXM 2000 Series
To be certied for revenue metering, power providers
and utility companies must verify that the billing energy
meter performs to the stated accuracy. To conrm the
meter’s performance and calibration, power providers use
eld test standards to ensure that the unit’s energy
measurements are correct. Since the PXM 2000 Series are
traceable revenue meters, each model 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 Figure 6.5 for an example of how this process works.
• Refer to Table 6.1 for the Wh/Pulse Constants for Accuracy Testing.
Table 6.1: Infrared & KYZ Pulse Constants for Accuracy Testing - Kh Watthour per pulse
Class 10 Models Class 2 Models
Below 150V 0.500017776 0.1000035555
Above 150V 2.000071103 0.400014221
Minimum pulse width is 90 milliseconds.
Figure 6.5: Using the Watt-Hour Test Pulse
Figure 6.4: Watt-Hour Test Pulse
Watt-Hour
Test Pulse
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