Protection Functions; Over Voltage Protection (Ovp); Over Current Protection (Ocp) - ITech IT8700 Series User Manual

Wdc=0.00W
3. Press
Sync On Set
Von
Measure Rate
4. Press
press
Von point
Von Latch
Exit
5. Press
Latch to enable on/off state, such as On, press
6. Press
Open the load's input
7.
When in remote control mode （USB / RS232 / Ether-net） ，you can send SCPI
command VOLT:ON <n> to set Von value; send VOLT:LATch ON to enable Von
LATCH function.

4.11 Protection functions

Load has the following protection functions: over voltage protection （OVP） ,over
current protection（OCP）, over power protection(OPP), over temperature
protection(OTP), reverse voltage alarm (LRV/RRV）.
The mainframe will act appropriately once any of the above protection is active.
You can press any button on front panel to restore the protection function. For
example, the electronic load come into over temperature protection, the buzzer
will alarm, the input will automatically shut down and Main frame VFD will
display OTP.

4.11.1 Over voltage protection (OVP)

If the OVP circuit has triggered, buzzer alarm, the main frame screen will
displays (OVP), the condition will remain until they are reset.
Operations to clear the OVP state:
Check whether the input voltage is in the load's rated voltage or the
programmed protecting voltage ranges. If it is outside of the range, please
disconnect the instrument under test. Press any key on the front panel (or send
commandPROTection:CLEar), the (OVP) displayed on the front panel will
disappear, load exits OVP protection state.

4.11.2 Over current protection (OCP)

The electronic load includes both hardware and software over current
protection features.
⚫ Hardware OVP: load's maximum input current will be limited at about 110%
of the current range, once the hardware OCP is triggered, the status
register's OC bit will be set; when the hardware OCP is removed, the
status register's OC bit will be reset. Hardware over current protection
won't affect load's on/off state.
⚫ Software OCP: users can set load's software OCP value, steps:
+ to enter configuration menu
to select <Von>, press
key to enter, input the programmed value, such as 1V, press
key to confirm
to select <Von Latch>, press
key to exit
Copyright © Itech Electronic Co., Ltd.
Operations introduction
Enter Enter
to enter. First set <Von point>,
key to enter, select
key to confirm
Shift Shift
+
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