
33
CURRENT MONITORING
Figure 36
– Current Monitor Settings
Optimizer3 monitors Current with loop-powered 4-20 mA current transducers. The transducers can be used to monitor motor
current, heater current, or the current of other accessory equipment. When Current is selected, scaling for the mA current range
and measured current range appear.
When Current mode is selected, scaling for the mA current range and measured Current range appear. High and Low Current Alarm
Limits appear. If either Alarm Limit is set to 0 (zero), the alarm is disabled.
The Low Current Alarm Limit is asserted if the measured current is less than or equal to the setting.
The High Current Alarm Limit is asserted if the measured current is greater than or equal to the setting.
A hysteresis of 1 (one) amp is applied to an active alarm to reduce nuisance toggling of the alarm. The alarm is non-latching and
clears itself when the measured current is between the alarm limits.
If Yes is selected for Run-Time Metrics, it is assumed the current sensor input is connected around the input conductor to a spring
charging motor, air compressor motor, or hydraulic pump motor. The cumulative run time, the number of runs per day, and
average run duration are reported and logged. If Yes is selected for Monitor Load Metrics, the maximum current per run, run time,
and I²T for the run is reported and logged. Load Metrics are useful for spring charging motors and Run Time Metrics are useful for
air compressors or hydraulic pumps.