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Load Function

4.3.3 Set Under-Voltage Protection (UVP)

Users can enable the UVP function and set the instrument warm-up time

Warm-up, protection limit Level and protection delay time Delay. When the

voltage (i.e., the Meter value) is lower than this protection limit and the warm-up

time, delay time are exceeded, the instrument will enter the UVP state.

Possible Cause

Many reasons can cause UVP, the details are as follows:

• The set protection limit Level is greater than the voltage Meter value.

• Input too low external voltage.

How to Set

The operation steps to set UVP are as follows.

1. Press the composite keys [Shift]+[R-set] (Protect) on the front panel to en-

ter the protection menu.

2. Press the up/down key or rotate the knob to select UVP and press [Enter].

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

enter the setting interface.

4. Set the warm-up time Warm-up, protection limit Level and delay time Delay

in sequence, and then press [Enter] to confirm.

4.3.4 Over-Temperature Protection (OTP)

When internal temperature of instrument is higher than about 90 °C, the instru-

ment is under temperature protection. At this time, the instrument will automati-

cally be OFF and VFD status indicator Prot lights up and the screen prompts

OTP.

Possible Cause

To prevent damaging heat build-up and ensure specified performance, make

sure there is adequate ventilation and air flow around the instrument to ensure

proper cooling. Do not cover the ventilation holes on the rear panel, sides, or

bottom of the instrument. Even with proper ventilation, the instrument can over-

heat in the following situations.

• If the ambient temperature is too high.

• If you use the instrument to test for long periods.

ITech IT8000 Series User Manual

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