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electronic load is 30A. When any value beyond 30A is input, the load will default back to 30A.Besides, the
maximum current value input is closely related to current resolution. If the maximum current value set is
below 3A, the load's current resolution will be 0.01mA; if the maximum current value set is above 3A, then
the load's current resolution will be only 0.1mA.
4.5.3 Over Power Protection (OW)
If input wattage exceeds the maximum wattage range of the load, it will automatically shut down the
input. A buzzer will sound and the VFD panel displays the
OVER POW
message
Press any key to get the load back ro normal operation. Note: if the current input state is
OFF
, press
the
ON/OFF
key to make the load resume normal operation. If the over power problem is not solved, the
load will continue to display the
OVER POW
message.
The load's maximum wattage value can be set by pressing both the
Shift+0(Menu)
keys. When the
VFD display shows
MENU SYSTEM SET
, press the
Enter
key to confirm. Now the VFD display shows
SYSTEM PMAX=xxxxxxxxW
setting input. Here the current maximum wattage value is displayed as
300W. Entering a different current value can be done using both the numeric and decimal point keys.
Pressing the
ESC
key exits the
Menu
mode.
Note:
The maximum acceptable input wattage of the M9712 DC electronic load is 300W. When any
value beyond 300W is input, the load will default back to 300W.
4.5.4 Input Polarity Reversed
If the DC electronic load has its input polarity reversed , a buzzer will sound and the VFD display will show
REVERSE
as a message
4.5.5 Over Heat Protection(OH)
When the temperature of internal power components exceeds 80
°
C
℃
, over heat protection will be
automatically initiated. The load will shut down input, a buzzer will sound and the VFD display will show the
OVERHEAT
message.
4.6 Remote Measurement Function
When in CV, CR and CP mode, if the DC electronic load consumes high current, the power supply
under test will have a voltage drop in the cables/wires connecting it to the load's BP terminals. In order to
assure measurement accuracy, there are remote measurement terminals installed on the rear-panel of the
DC electronic load. Users can measure the voltage at the output terminals of the power supply under test
by using these rear panel terminal connections.
The remote measurement function can be set up by pressing both the
Shift+0(Menu)
keys. Go to
MENU SYSTEM SET
, and press
Enter
.The display will come up at
SYSTEM IMAX=xxxxxxxxA
. Use the
Up
and
Down
keys and scroll to
SYSTEM TERMINAL SEL
and press
Enter
. There are only two options
for the remote measurement function,
TERMINAL SELECT FRONT
or
TERMINAL SELECT BACK
. Use
the
Up
and
Down
keys to make a selection.
TERMINAL SELECT FRONT
means the Binding Post (BP)
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