Chapter 2 Operating the EM720
TEST Mode
EM720 Power Quality and Revenue Meter
15
Rated Voltage,
V
Secondary
Current, A
Pulse Rate,
imp/kWh
57-120 1 20,000
57-120 5
4,000
120-277 1
12,500
120-277 5
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,
imp/kWh (Wh/imp)
Range,
imp/kWh (Wh/imp)
57-120
1
20,000 (0.05)
20,000-100,000 (0.01-0.05)
57-120
5
10,000 (0.10)
4,000-100,000 (0.01-0.25)
120-277
1
20,000 (0.05)
12,500-100,000 (0.01-0.08)
120-277
5
10,000 (0.10)
2,500-100,000 (0.01-0.40)
See
Device Options and Mode Control
change the LED pulse rate in your meter.
TEST Mode
The EM720 can run in NORMAL or in TEST mode.
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
Device Options and Mode Control
put your meter in TEST mode and to change the test LED
pulse rate. See
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
Device Diagnostics
Device diagnostic messages may appear as a result of the
EM720 built-in diagnostic tests performed during start-up and
device operation.
A blinking diagnostics indicator is shown on the display
whenever there are diagnostic messages. See
