Performing Watt-Hour Accuracy Testing (Verification) - Eaton IQ 100 series User & Installation Manual

IQ 100 Series (130/140/150) Meter
Programming the Meter Using the Front Panel

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 IQ 100 Series 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 the figure below for an example of how this process works.
• Refer to the table below for the Wh/Pulse Constants for Accuracy Testing.
Infrared & KYZ Pulse Constants for Accuracy Testing - Kh Watthour per pulse
Input Voltage Level
Below 150V
Above 150V
NOTE: Minimum pulse width is 90 milliseconds.
54 User and Installation Manual IM02601003E-July 2010 www.eaton.com
Using the Watt-Hour Test Pulse
Class 10 Models
0.2505759630
1.0023038521
Watt-Hour
Test Pulse
Class 2 Models
0.0501151926
0.2004607704