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Functions and Features

2. Use left and right keys or rotate the knob to select OCP and press [Enter]

key to confirm.

3. Use left and right keys or rotate the knob to select On and press [Enter] key

to confirm.

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

to confirm.

5. Rotate the knob to adjust the delay time Delay and press [Enter] key to

confirm.

6. Press [Esc] to exit the protection menu setting.

Clear Over-Current Protection

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

ditions 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.

4.3.4 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 ex-

cessive 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.

Delay time Delay — You can specify an OPP delay to prevent momentary

output settings, DUT and status changes from tripping the over-power pro-

tection. In most cases these momentary conditions would not be considered

an over-power protection fault, and having an OPP condition disable the out-

put when they occur would be a nuisance. Specifying an OPP delay lets the

OPP circuit ignore these momentary changes during the specified delay pe-

riod. Once the OPP delay time has expired and the over-power condition

persists, the output will shut down.

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

• Instrument output is off;

• The buzzer sounds intermittently;

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

ITech IT-M3140 Series User Manual

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