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Operation and Application

4.10.5 Set the Over-Current Protection (peak)

The user can set the over-current protection point for the over-current protection

(peak) function. When the output current reaches the over-current protection

point, the over-current protection (peak) will turn off the output. The function is

mainly used to protect the DUT connected during test to prevent it from damage

due to over-current. The OCP (peak) function is always enabled.

Set the OCP(peak) point

1. Press the composite keys [Shift] + [F-set](Protect) to enter Protect menu

interface.

2. Rotate the knob to select OCP(peak) and press [Enter] key to confirm.

3. Rotate the knob to adjust the OCP(peak) point and press [Enter] key to

confirm.

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

Set the OCP delay

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

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

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

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

nuisance. Specifying an OCP delay lets the OCP circuit ignore these momenta-

ry changes during the specified delay period. Once the OCP delay time has ex-

pired and the over-current condition persists, the output will shut down.

1. Press the composite keys [Shift] + [F-set](Protect) to enter Protect menu

interface.

2. Rotate the knob to select OCP Delay and press [Enter] key to confirm.

3. Rotate the knob to adjust the OCP delay time and press [Enter] key to

confirm.

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

Clear OCP(peak) status

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

• The instrument output is turned off, and other keys (except the [Esc] key)

are locked.

• The buzzer sounds intermittently three times: one long beep and two short

beeps.

• The interface displays “OCPpeak Occurred!!”;

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

ITech IT-M7700 Series User Manual

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