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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
OVERHEATmessage.
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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