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4.0 Meter Installation (Continued)
4.5 Line Voltage/Current Sensor Diagnostics
The three-phase AC MAINS voltage wiring and
the current sensor wiring must be connected in
the proper phase sequence. If there is a phase
sequence error, the display LCD will display a
message ‘Check Sensor” in the upper right
hand corner. Additionally, LED D1, Check
Sensor, will illuminate if there is a phasing error.
Verify that the AC MAINS voltage wires are all
connected to the correct positions on terminal
block TB1. Inspect the MAINS input wiring to
verify each conductor is terminated at the
correct terminal block position. Using an AC
voltmeter, measure the AC voltage for each (Main Board Confi g. Shown)
Phase to Neutral terminal and to the Frame
ground point.
Verify each current sensor by running at least 1% of the full scale rated current
through the conductor being monitored by each phase. (e.g. 2 amp load required
for each phase to perform sensor diagnostic procedures.)
- Verify that the current sensor white and black conductors are installed in the
correct header positions.
- Verify the current sensors are installed in the correct direction on the conductor
being monitored.
- Verify that the current sensor plugs are terminated in the correct header on the
Main power board if meter is equipped with removable MI terminal blocks.
If the error messages still haven’t been cleared, measure the AC voltage inputs
across the plug terminals of each current sensor, individually. Set the AC volt-
meter to the 20 Volt scale. If a reading of zero volts is indicated on the voltmeter,
check for an open circuit. An open connection could exist at the plug terminals
or at a splicing junction. Also verify a tight connection exists between the core
halves.
If error message is still appearing, contact E-Mon technical support at (800) 334-
3666 for further assistance.
Final Main Board Checks
Once the phase error has been corrected, the Display LCD “Check Sensor” error
should extinguish and the Main Power Board LED D1 should extinguish.
D5 (meter power)
D1
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