TREND EM3_CT_N - Manual (Page 5)

Operation
PowerRail303 Page 3
2 Operation
2.1 Energy Displays
2.2 Total kWh Register
This default display presented on power up shows total kWh on an 8-digit accumulating register.
Register scaling is determined by user programmed CT and/or PT constants. On standard
PowerRail meters this register may not be reset.
2.3 KWh Count Register
The kWh Count display is a 7-digit resetable accumulating energy register. This acts in a similar
manner to the “Trip” display on a vehicle odometer.
•
Press the key to select Total kWh or kWh Count display pages. The kWh Count
display remains visible for 1 minute before the unit reverts to Total kWh mode.
•
Press and hold the and keys for approximately 5 seconds to reset the kWh Count
register to zero.
1234567.8 kWh
Total kWh Register
1234567.8 kWh
Count
kWh Count Register
Scaling of the energy registers is set by the nominal input currents and voltages and remains
constant during normal operation of the meter.
Energy registers will accumulate from zero to 99999999, and then restart from zero.
If no keys are pressed, the meter will automatically revert to the Total kWh Register display after
60 seconds.
Both energy registers are stored in non-volatile memory during power loss to the meter.