System-Related Functions
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⚫
Instrument output is off;
⚫
The buzzer sounds;
⚫
The interface displays “OCPpeak” and flashes
To clear the peak OCP and return to normal operation, firstly remove the
conditions that caused the protection fault. Press
[Shift]
+
[Esc]
key (or send
the command PROTection:CLEar) to clear the protection status. The
message displayed in front panel is cleared and the instrument exits
protection status.
5.6.3 Set Voltage/Current/Power Limit Range
The maximum voltage, current and power of the power supply ranges from
minimum to full-rated output range. You can setting maximum and minimum
values of power supply voltage/current/power in the protection menu. When limit
setting is finished, the voltage setting value, current setting value and power
setting value can only be set within the maximum and minimum limits.
Limit factory setting is the rated output voltage/current/power of corresponding
model of the power supply. Minimum is 0.
Take the voltage limit setting for an example, the operating as follows:
1.
Press [
Shift
]+[
Config
] (Protect) keys and enter to Protection menu.
2.
Press the up/down key or rotate the knob to select Voltage limit range and
press [
Enter
].
3.
Set the V+ limit and the V- limit in sequence, and press [
Enter
] to confirm.
5.6.4 Over-temperature protection (OTP)
When the temperature of the power component in the power supply exceeds
95°C, the temperature protection will be enabled. In this case, the power supply
will be automatically OFF, and the LCD will display
. At the same time, the
OT position in the status register will be set and kept until power supply is reset.
Clearing over-temperature protection:
When the power supply temperature decreases to the protection temperature,
press
[Shift]+[Esc]
key on the front panel (or send the command
“PROTection:CLEar”). Then
on the power supply screen will disappear,
and the power supply will exit the OTP status.
5.6.5 Over-power protection (OPP)
When the output power exceeds the set power, OPP will be enabled, and
will appear on the LCD screen.
Clearing over-power protection:
In the case of over-power protection, disconnect the tested object at first. Press
[Shift]+[Esc]
on the front panel (or send the command “PROTection:CLEar”) to
clear
on the front panel and exit the OPP mode.
5.7 Screen Capture Function
IT7800 series power supply has the screen capture function. Insert the USB
equipment into the USB interface of the front panel, and press
[Print]
on the
front panel to capture and save the current screen into the USB disk.
When you need the screen capture function, the USB type under the system
