Functions and Characteristics
Copyright © Itech Electronic Co., Ltd. 42
If any of the above protections are activated, the electronic load enters the
corresponding self-protection mode, such as over temperature protection, the
load will generate an alarm and the input will automatically switch to the OFF
state. The VFD will display the OTP. You can clear the protection by pressing
any button on the front panel.
Over voltage protection (OVP)
If input voltage exceeds the voltage limit set by the user, the DC load will turn
the input OFF and the buzzer will sound. The display will show OVP.
Press any key on the front panel to exits OVP protection state.
Over current protection (OCP)
The DC load includes both hardware and software over current protection
features.
Hardware OCP: Maximum input current of the DC load will be limited at
about 110% of the current range, once the hardware OCP is activated, 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
will not change the DC load’s On/Off state.
Software OCP: When the software OCP function is turned on, if the load
current exceeds the OCP set value and continues to exceed the set delay
time, the load will automatically turn OFF and the VFD will display OCP. At
the same time, the OC and PS bits in the status register will be set and they
will remain until they are reset. For related configuration items and
descriptions, see 3.7 Config Menu (Config).
Over power protection (OPP)
The DC load includes both hardware and software over power protection
features.
Hardware OPP: You can set the hardware OPP value of the load. The load
will be limited by the hardware to the power value. Hardware OPP does not
change the DC load’s On/Off state.
Software OPP: You can also set the software OPP value of the load.
For related configuration items and descriptions, see 3.7 Config Menu
(Config).
Over temperature protection (OTP)
When the electronic load internal power device temperature exceeds about
85°C, the electronic load activates the temperature protection mode. At this
time, the load input will be automatically turned OFF, and the VFD will display
the OTP. At the same time, the OT and PS bits in the status register will be set
and they will remain until they are reset.
3.14 Current Monitoring (I Monitor)
Current monitoring terminal will output 0-10V analog signal to
corresponding to 0 to full range of input current. You can connect an external
voltmeter or an oscilloscope to display the input current’s changing.
3.15 Ripple Function
IT8500+ series DC electronic loads have test ripple function. In the main
interface by pressing the up and down keys, you can read the VPK, APK value
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