Verification
7.3.3.3 Checking Low Voltage Range
A. Connect the Load module, DC source, DMM and current shunt as Figure 7-1 shows.
Use DMM (V) to measure the voltage passing through the module’s input terminal. Be
careful in making connections so that contact resistance voltage drop will not affect the
readings.
B. Press till VFD shows CV and press to light up the L range LED indicator.
C. Press to set load voltage and press to set limit current. The DC Source
voltage output and limit current settings are based on the voltage/current values listed in
Table 7-13.
D. Next, press to enable the load and wait for 30 seconds to record the voltage
passing through the negative input terminal.
Table 7-13
Model
Setting/Limit
Voltage/Limit
Front Panel Display
Reading
Max. Min.
63630-600-15
63640-150-60
63630-80-60
63610-80-20
63640-80-80
*If the voltage is incapable of loading as the value set, it can add load limit current or lower
down the limit current of DC Source.
7.3.4 CP Mode Verification
This test verifies if the current programming and reading value on the front panel display are
within specifications when the module is operating in CP mode. For each DMM reading, the
current displayed on the front panel should be totally the same. The voltage (DMM (V))
passes through the input or measurement terminal of module as well as the current shunt.
Shunt current = DMM (I) voltage/shunt resistance. If the voltage output of DC Source and/or
limit current setting is wrong, OPP or OCP of load module may be triggered. Press
can close the alarm screen and reset the power value.
DMM (W) load reading power = DMM (V) reading volt × DMM (I) current shunt ± inaccuracy
DMM (V): It means the voltage measurement of DMM dc voltage.
DMM (I): It means the current shunt measurement of DMM dc voltage.
Example: Use the Table 7-14 below to analyze the example. Select model 63640-80-80 and
operate in high power range. The power accuracy is 0.3%Set + 0.3%F.S. and the panel
reading accuracy is 0.1%Set + 0.1%F.S from the specifications list, where the Vrange F.S.
should be 80V, Irange F.S. should be 80A, and the power F.S. should be Vrange F.S. ×
Irange F.S.= 80×80 =6400W.
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