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Protection Function

Clear Over-Current Protection

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

• Instrument input is off;

• The buzzer sounds;

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

• Status register, the OC status bit is set to 1;

To clear the over-current 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 Current

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

6.2 Set Over-power Protection

Over-power protection function allows the user to enable the protection and set

a over-power limit (Level) and delay time (Delay). This function prevents the

output power from being higher than the limited output power and protects the

connected DUT so it this is not over-power and possibly damaged due to an

excessive power.

An over-power protection will occur if:

• Enable OPP;

• The output power value is greater than the set power protection point Level

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

Enable OPP

1. Press [Shift]+[Recall] (Protect) to enter Protect menu interface.

2. Rotate the knob to select OPP and press [Enter] to confirm.

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

4. Rotate the knob to adjust the over-power limit Level and press [Enter] to

confirm.

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

6. Press [Esc] to exit.

Delay time

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

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

momentary conditions would not be considered an over-power protection fault,

and having an OPP condition disable the output when they occur would be a

ITech IT-M3300 Series User Manual

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