Power Supply Function
4.5.4 Set Under-Current Protection (UCP)
Users can enable the UCP function and set the instrument warm-up time
Warm-up, protection limit Level and protection delay time Delay. When the cur-
rent (i.e., the Meter value) is lower than this protection limit and the warm-up
time, delay time are exceeded, the power supply will enter the UCP state.
Possible Cause
Many reasons can cause UCP, the details are as follows:
• The set protection limit Level is greater than the current Meter value.
• Input too low external current.
• The power supply outputs a low current due to a fault.
How to Set
The operation steps to set UCP are as follows.
1. Press the composite keys [Shift]+[Recall] (Protect) on the front panel to en-
ter the protection menu.
2. Press the up/down key or rotate the knob to select 4. UCP (Off) 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.
For bi-directional power supplies, Level can be set to a positive or nega-
tive value, i.e. the same protection limit is set for the output or input
current.
The VFD screen returns to the Protect menu and the UCP setting (take 10S,
0.1A, 1S as an example) is displayed as follows:
PROTECT
4.UCP 10S, 0.1A, 1.000S
4.5.5 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
Copyright © Itech Electronic Co., Ltd.
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