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6.4: Performing Watt-Hour Accuracy Testing
(Verification)
To be certified for revenue metering, power providers
and utility companies must verify that the billing energy
meter performs 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 Shark ® 200 meter 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 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
Input Voltage Level
Below 150V
Above 150V
NOTES:
• Minimum pulse width is 90 milliseconds
• Refer to Chapter 2, Section 2.2, for Wh Pulse specifications.
e
Electro Industries/Gauge Tech
Figure 6.5: Using the Watt-Hour Test Pulse
Class 10 Models
0.500017776
2.000071103
.
Doc# E149701
Figure 6.4: Watt-Hour Test Pulse
Class 2 Models
0.1000035555
0.400014221
Watt-Hour
Test Pulse
6-12
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