Maynuo Electronic M9712 - Protection Functions; Over Voltage Protection (OV); Over Current Protection (OC)

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DC Electronic Load Mode Changes
Diagram 4-14 Software Maximum Setting Value
4.5 Protection Functions
The DC Electronic Load features the following protection functions.
4.5.1 Over Voltage Protection (OV)
If input voltage exceeds the maximum voltage range of the load, it will automatically shut down the
input. A buzzer will sound and the VFD panel displays the Over Volt message
The DC Electronic load's maximum voltage value can be set by pressing both Shift+0(Menu) keys.
When the VFD display shows MENU SYSTEM SET, press the Enter key to confirm. Now the VFD display
shows SYSTEM IMAX=xxxxxxxxA. Use the Up and Down keys to reachSYSTEM UMAX=xxxxxxxx Ｖ
setting input. Here the current maximum voltage limit value is displayed as 150V. Entering a different
voltage 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 voltage of the M9712 DC electronic load is 150V. When any
value beyond 150V is input, the load will default back to 150V.
Besides, the maximum voltage value input is closely related tovoltage resolution. If the maximum
voltage value set is below 20V, the load's voltage resolution will be 0.1mV; if the maximum voltage value
set is above20V, then the load's voltage resolution will be only 1mV.
4.5.2 Over Current Protection (OC)
If input current exceeds the maximum current range of the load, it will automatically shut down the
input. A beep will sound and the VFD panel displays the OVER CUR message
The load's maximum curent 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 IMAX=xxxxxxxxA setting input. Here the current maximum current value is displayed as 30A.
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 current of the M9712 DC
I
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Software Maximum
Current Set
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Software Maximum
Power Set
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