Function and Features
Copyright © ITECH Electronic Co., Ltd. 30
Clear overvoltage protection status
Inspect whether voltage of object under test is within load rated voltage or set
protection voltage range. If not, disconnect the object. Press any key on load
front board (or send command to PROTection:CLEar), the load front board
(OVP) word will get cleared and the load will exit OVP protection status.
3.17.2 Overcurrent protection (OCP)
The electronic load is provided with two kinds of overcurrent protections:
hardware overcurrent protection and software overcurrent protection.
Hardware overcurrent protection: maximum load current of the electronic
load is limited within about 110% of the existing current range by hardware.
When the hardware triggers overcurrent protection, OC bit of the status
register will be set; when such protection is removed, the OC bit will be
reset. The On/Off status of load will not be changed by the hardware
overcurrent protection.
Software overcurrent protection: the user can set load software overcurrent
protection value following steps: press [Shift] + [9] key >Protect> A-limit
( set as ON). I point is set as OCP current value and A delay set as
pre-alarm delay time. When software overcurrent protection function is on,
if the loading current value exceeds delay of such overcurrent protection
set value, the load will automatically be OFF and the VFD will display OCP.
At the same time, OC and PS bits of the status register will be set and keep
till reset.
Clear overcurrent protection status
Inspect whether current of object under test is within load rated current or set
protection current range. If not, disconnect the object. Press any key on load
front board (or send command to PROTection:CLEar), the load front board
(OCP) word will get cleared and the load will exit OCP protection status.
3.17.3 Overpower protection (OPP)
The electronic load is provided with two kinds of overpower protections:
hardware overpower protection and software overpower protection.
Hardware overpower protection: the user can set load hardware overpower
protection. Load overpower will be limited to existing power value. The
On/Off status of load will not be changed by the hardware overpower
protection.
Software overpower protection: the user can set load software overpower
protection value following steps: press [Shift] + [9] key >Protect> Point set
OPP power value. P limit is set as pre-alarm delay time. If the loading
power value exceeds delay of such overpower protection set value, the
load will automatically be OFF and the VFD will display OPP. At the same
time, OP and PS bits of the status register will be set and keep till reset.
Clear overpower protection status
Inspect whether power of object under test is within load rated power or set
protection power range. If not, disconnect the object. Press any key on load
front board (or send command to PROTection:CLEar), the load front board
(OPP) word will get cleared and the load will exit OPP protection status.
3.17.4 Overtemperature protection (OTP)
When internal power device of load is higher than about 85 °C, the load is
under temperature protection. At this time, the load will automatically be OFF
and VFD will display OTP. At the same time, OT and PS bits of the status
register will be set and keep till reset.
Clear overtemperature protection
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