Doc# E166703 6-5
6: Using the Watt-Hour Test Pulses
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
NOTE: Watt-hour Standards offer pulse inputs that take in the CPU's test pulses. The
accuracy is computed by ratio-metrically comparing the period of the meter's pulse to
the period of the Standard's internal pulse. You must program the test pulse value
(Kh) into the Standard for the results to be accurate.
The example test procedure that follows covers only the testing of the three phase
and single phase versions of the MP200 unit. The test procedure used for the Stan-
dard shall be determined by the manufacturer of the Standard used.
Three Phase Test Procedure
1. All circuits and equipment must be de-energized.
2. Connect the three phase potential input lines to "Va", "Vb", and "Vc" and the neu-
tral to "V-Ref" & "GND."
3. Connect power leads to the "L" and "N" connections.
4. Monitor the #1 test pulse by placing the photo detector over the #1 LED.
5. Connect the three phase current inputs to the current terminals associated with the
test pulse LED being monitored. There must be no other current inputs connected.
6. Energize the Standard and the MP200 unit. To assure accuracy, both must be on for
a minimum of 30 minutes.
7. Energize the sources and wait for the outputs to stabilize before starting the test.
8. Start the test as per the appropriate procedure for the Standard and/or comparator
used.
9. When the test is completed, de-energize the sources.
10. Place the photo detector over the next test pulse to be monitored.
11. Repeat steps 5 through 10 until all test pulses are checked.
12. De-energize all circuits and remove power from the Standard, sources, and the
MP200 unit.
13. Disconnect all connections from the MP200 unit.