Manual

Chapter 2 Operating the EM920
TEST Mode
16 EM920 Power Quality and Revenue Meter
Rated
Voltage, V
Secondary
Current, A
Kh,
Wh/imp
Pulse Rate,
imp/kWh
120-277 1 0.08 12,500
120-277 5 0.40 2,500
The LED pulse rate in TEST mode is user-programmable. The
factory set defaults and available ranges are shown in the
following table.
Rated
Voltage, V
Secondary
Current, A
Default Pulse Rate,
Wh/imp (imp/kWh)
Range,
Wh/imp (imp/kWh)
57-120 1 0.05 (20,000) 0.01-0.05 (20,000-100,000)
57-120 5 0.10 (10,000) 0.01-0.25 (4,000-100,000)
120-277 1 0.05 (20,000) 0.01-0.08 (12,500-100,000)
120-277 5 0.10 (10,000) 0.01-0.40 (2,500-100,000)
See Device Options and Mode Control in Chapter 5 on how to
change the test LED pulse rate in your meter.
TEST Mode
The EM920 can run in NORMAL or in TEST mode. The present
operating mode is indicated on the display status bar at the
bottom of the screen.
TEST mode is intended for testing the device energy
measurement accuracy without affecting the billing energy
and demand data. All instrumentation data is still available in
TEST mode.
The front pulse LED indicators flash at a programmable rate
in TEST mode, and the billing data display shows separate
test kWh and kvarh energy readings with an extended 0.001
kWh resolution. See Energy Pulse LED Indicators
above for
the test LED pulse rates.
You can enter TEST mode directly by an extended press on
the TEST button located under the meter cover, or via PAS.
See The TEST Button
in Chapter 3 and Device Options and
Mode Control in Chapter 5 on how to put your meter in TEST
mode and to change the test LED pulse rate.
See TEST Mode Data Display
for more information on the
TEST mode display.
NOTE
In TEST mode the following features are not operational:
• setpoints
• power quality recorder
• fault recorder
• relay outputs
• instrument transformer correction
• transformer/line loss compensation