Function
and Features
Copyright ©ITECH Electronic Co., Ltd.
34
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.
3.18.3
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 > P- Limit >
Point set OPP power value. Delay 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.
3.18.4
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
When load temperature is decreased to protection point, press any key on load
front board (or send command to PROTection:CLEar), the load front board
(OTP) word will get cleared and the load will exit OTP protection status.
3.19 Functions of the terminals at the rear panel
3.19.1
Remote sense compensation functions
Under CC, CV, CR or CP mode, if the load consumes large current, a large
voltage drop will be detected in connection line between tested instrument and
