CHAPTER 3: USING THE METER
VERIFYING METER FUNCTIONALITY
EPM 4
5
00 SUB METER – INSTRUCTION MANUAL
3–5
3.3
Verifying Meter Functionality
3.3.1
Overview
Once you have familiarized yourself with the EPM4
5
00 menu structure,
it is critical
to verify
that the meter and CTs are properly installed.
Note
To correctly diagnose the meter, there must be loads on all three phases of the meter.
3.3.2
Verifying Voltage
Z
Press and hold the Display Scroll button until the following menu
heading is displayed:
Z
Release the Display Scroll button.
• Scroll down by pressing and releasing the Display Scroll Button
until one of the following sub-menus are displayed (examples
shown for 120 V, 277 V, and 347 V, respectively):
Z
Verify that phases A, B and C are displaying voltages; i.e., for a
120 V AC, the reading should be 117 V +10%/–15%.
3.3.3
Verifying kWh Reading
Z
Press and hold the Display Scroll button until the following menu
heading is displayed:
Z
Release the Display Scroll button. Scroll down by pressing and
releasing the Display Scroll button until the following sub-menu is
displayed:
Z
Verify that the kWh value increases as you view the LCD.
Z
To view screens for Meters 2 to 8 (M#2 to M#8), repeat the above
steps.
Phase Diagnostic
Registers
Volts
125.3 A
124.0 B
124.7 C
Volts
276.3 A
277.0 B
277.7 C
Volts
348.5 A
347.1 B
347.7 C
kW
Registers
AllHrs
kWH
1.046 M# 1