BK Precision MDL4U Series, Руководство пользователя

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Introduction 14
Operations To Clear the OCP State
Check whether the input current is within the electronic load’s rated current or the programmed protection current ranges.
If it is outside the range, disconnect the device under test. Then press any key on the front panel or remotely send SCPI
command PROTection:CLEar. The OCP displayed on the front panel will turn off and the load exits OCP protection
state.
1.7.4 Overpower Protection (OPP)
The electronic load includes both hardware and software OPP features.
Hardware OPP – In the event that the electronic load’s input power exceeds the set power protection limit, the hardware
OPP will limit the power. Once the hardware OPP is triggered, the status register’s OP bit will be set. When the
hardware OPP is removed, the status register’s OP bit will be reset. Hardware overpower protection will not turn the
electronic load’s input off.
To set the electronic load’s OPP value:
1. Power on the electronic load. Self-test
2. Press + to enter Configuration menu.
3. Press key to select P Protect and press Enter to go into protection menu.
4. Press key to select Plimit Point and press Enter.
– Input OPP power value and press Enter to confirm.
5. Press key to select Plimit Delay and press Enter.
– Input delay time before alarm and press Enter to confirm.
6. Press Esc key to exit menus
If the electronic load’s power value is above the set overpower protection value, the electronic load will automatically turn
off and the VFD will display OPP. At the same time, the OP and PS bits in the status register will be set and remain
until they are reset.
Operations to Clear the OPP State
Check whether the input power is within the rated power range or the programmed protection ranges. If it is out-
side the range, disconnect the device under test. Then press any key on the front panel or remotely send command
PROTection:CLEar. The OPP displayed on the front panel will turn off and the electronic load exits OPP protection
state.
1.7.5 Overtemperature Protection (OTP)
Each module has an overtemperature protection circuit, which will turn off the input if the internal temperature exceeds
safe limits. When the electronic load’s internal circuit temperature is over 85°C, the load will enable OTP. Input will
automatically be turned off and the VFD will display OTP. At the same time the OT and PS bits in the status register
will be set and remain until they are reset.
Operations to Clear the OTP State
When the electronic load temperature has dropped below the protection point, press any key on the front panel or
remotely send command PROTection:CLEar. The OTP displayed on the front panel will turn off and the electronic load
exits OTP protection state.