Operation and Application
point, the over-current protection (rms) 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 (rms) function is always enabled.
Set the OCP(rms) point
1. Press the composite keys [Shift] + [F-set](Protect) to enter Protect menu
interface.
2. Rotate the knob to select OCP(rms) and press [Enter] key to confirm.
3. Rotate the knob to adjust the OCP(rms) 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(rms) 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 “OCPrms Occurred!!”;
• Status register, the OCPrms status bit is set to 1.
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
PROTect:CLEar) to clear the protection status. The “OCPrms Occurred!!” dis-
played in front panel is cleared and the instrument exits OCP status.
Copyright © Itech Electronic Co., Ltd.
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