Kikusui PLZ-30F, Operation Manuals

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4-10 Basic Operation PLZ-U
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Overheat protection (OHP)
When abnormal temperature is detected in the internal power unit, the load is turned
off. Check whether the air inlet on the front panel and the air outlet on the rear panel
are being obstructed.
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Overvoltage protection (OVP)
When a voltage greater than or equal to 110 % of the rated operating voltage is
detected, the load is turned off.
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Reverse connection protection (RVP)
When a reverse voltage is detected on the load input terminal, the load is turned off.
Immediately turn off the output of the equipment under test.
For the PLZ70UA, when the reverse connection protection (RVP) activates while
the test connecting 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." in section 4.3, “Basic Operation.”
4.4.2 Alarms
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Alarm number
When an alarm is activated, the ALM indicator of the corresponding channel illumi-
nates. Press the DISP key several times to check the alarm number.
Fig. 4-5 Alarm indication example
Table 4-1 Alarm number
The alarm type is assigned to each bit inside the PLZ-U as shown in Fig. 4-6. The
alarm number is a decimal notation of the bit. Therefore, the alarm number when
multiple alarms are activated is the total of the individual alarm numbers.
Alarm Number Alarm Type
1 Undervoltage protection (UVP)
2 Overcurrent protection (OCP)
4 Overpower protection (OPP)
8 Overheat protection (OHP)
16 Overvoltage protection (OVP)
32 Reverse connection protection (RVP)
Alarm number
ALM indicator