3A SERIES
OPERATION MANUAL
Entire Contents Copyright
2014 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
3A SERIES AC & DC LOAD OPERATION MANUAL
Page 47 of 56
7.5
Current Output Monitor (I-Monitor)
The I-Monitor terminal is designed to monitor the electronic load module's sink current. An
isolated amplifier output with 0V to 4V full scale output signal represents the zero to full scale
current the electronic load is sinking. Regardless of Preset ON or OFF state, the analog signal
output from the I-monitor is in direct proportion to the load current flowing through the load.
Please refer to the I-Monitor voltage /current scaling values for each 3A Series load modules in
Section 4, “Technical Specifications”.
7.5.1
Isolated Output
The I-monitor BNC output signal on 3A Series loads is through an isolation amplifier, e.g., the
earth potential of the output analog signal and the earth potential of the load input are
electrically isolated from each other. In this way, when a connection is made to an oscilloscope
on which another input channel is connected to both the high and low side of the load to
monitor voltage, no metering error results from any current flowing between the negative end
of the I-monitor BNC output and the negative end of the oscilloscope due to any voltage
differential.
Alternatively, two I-monitor outputs can be connected to two channels of the same oscilloscope
to observe two load current waveforms at the same time (Ch1 and Ch2).
Summary of Contents for 3A Series
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