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Protection Function

nuisance. Specifying an OPP delay lets the OPP circuit ignore these

momentary changes during the specified delay period. Once the OPP delay

time has expired and the over-power condition persists, the output will shut

down.

Clear Over-Power Protection

When over-power protection occurs, the instrument responds as follows:

• Instrument input is off;

• The buzzer sounds;

• The interface displays “Over Power Protect” and flashes;

• Status register, the OP status bit is set to 1.

To clear the over-power and return to normal operation, firstly remove the

conditions that caused the protection fault. Press [Esc] key (or send the

command PROTection:CLEar) to clear the protection status. The “Over Power

Protect” displayed in front panel is cleared and the instrument exits OPP status.

6.3 Set Under-Voltage Protection

Under-voltage protection function allows the user to enable the protection and

set a under-voltage limit (Level) and delay time (Delay).

An under-voltage protection will occur if:

• Enable UVP;

• The input voltage value is less than the set voltage protection point Level

and the period is greater than the set protection delay time Delay.

Enable UVP

1. Press [Shift]+[R-set](Protect) to enter Protect menu interface.

2. Rotate the knob to select UVP and press [Enter] to enter the setting

interface.

3. Rotate the knob to select On and press [Enter] to enable the function.

4. Rotate the knob and adjust the protection Level and press [Enter] to

confirm.

5. Rotate the knob to set the Delay time, press [Enter] to confirm.

6. Press [Esc] to exit.

Delay time

You can specify an UVP delay to prevent momentary output settings, DUT and

status changes from tripping the over-power protection. In most cases these

ITech IT-M3300 Series User Manual

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