Cal Power IT-M3400 Series User Manual page 79

Table of Contents

•

Enable UVP

1. Press [Shift]+[R-set](Protect) to enter Protect menu interface.

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

3. rotate the knob to select On and press [Enter] key to confirm.

4. Rotate the knob to adjust the warm-up time Warm Up and press [Enter] key

5. Rotate the knob to adjust the under-voltage limit Level and press [Enter] key

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

7. Press [Esc] to exit.

Warm-up time

You can specify the warm-up time for UVP protection to make the instrument

not judge the under-voltage protection fault within the specified warm-up time.

Delay time

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

status changes from tripping the under-voltage protection. In most cases these

momentary conditions would not be considered an under-voltage protection

fault, and having an UVP condition disable the output when they occur would be

a nuisance. Specifying an UVP delay lets the UVP circuit ignore these

momentary changes during the specified delay period. Once the UVP delay

time has expired and the under-voltage condition persists, the output will shut

down.

Clear Under-voltage Protection

When under-voltage protection occurs, the instrument responds as follows:

•

To clear the under-voltage 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 "Under

Enable UVP;

The output time exceeds the warm-up time;

The output voltage value is less than the set voltage protection point Level

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

to confirm.

confirm.

Instrument output is off;

The buzzer sounds;

The interface displays "Under Voltage Protect" and flashes;

Status register, the UV status bit is set to 1;

Protect Function

Table of Contents