Kikusui PLZ-4W Series, User Manual

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PLZ-4W Basic Operation 5-7
Undervoltage protection (UVP)
The protection trips when the voltage that is equal to or falls below the speci fi ed
voltage. At this point, the load is turned off. The undervoltage protection can be dis-
abled (OFF).
•
For a description of setting the undervoltage value, see section 5.4, “Setting the
Protection Function.”
Reverse-connection detection (REV)
The protection trips when a reverse voltage is applied to the load input terminal. At
this point, the load turns off.
In this case, turn off the power of the equipment under test within 30 seconds after
the protection detects a reverse voltage.
For the PLZ164WA or the PLZ664WA, when the REV activates while the test con-
necting with the DC power supply and the DUT in series, see “When the DC power
supply and the DUT are connected in series, and turning on/off of the DUT.
(PLZ164WA/PLZ664WA only)” in section 5.2, “Turning On or Off the Load.”
Overheat protection (OHP)
The protection trips when the temperature inside the power unit exceeds 95
°
C. At
this point, the load is turned off.
Check whether the air intake on the front panel and the air outlet on the rear panel
are being obstructed.
Alarm input protection
The protection trips when a low level (TTL) signal is applied to the ALARM
INPUT (pin 10) of the J1 connector on the rear panel.
Reset the alarm on the equipment connected to external control, and then reset the
alarm on the PLZ-4W.
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Clearing alarms
You can press the ENTER key when an alarm is activated to reset the alarm. How-
ever, note that the alarm will be activated again, if the cause of the alarm is not cor-
rected.