Overload Protection; Otp: Over Temperature Protection - Extech Instruments 382275 User Manual

Overload Protection
OUP: Over Voltage Protection
This unit has a built‐in over‐voltage protection feature. In the event of an output
voltage exceeding the allowable range (refer to the specifications section for range
limits), protection will be triggered and the output power will be switched off. (OUP
warning appears).
To reset the warning, switch off the power supply and remove all loading. Switch the
unit to resume normal operation. If this problem persists, please contact Extech
Technical Support.
OTP: Over Temperature Protection
The unit houses a thermo‐sensor that monitor to determine if an over‐heating
condition exists. The OTP warning will appear on the display and the output will switch
off in over‐heating condition does exist. When this warning appears, switch off the unit
and remove all loading.
In these cases, check the load and the output settings and then allow the unit to cool
for at least 30 minutes.
Ensure that the ventilation openings are not blocked and that the power supply has
proper clearance. Ensure that the cooling fan is operational; never use the power
supply with a faulty cooling fan.
OLP: Over Load Protection
Normally the overload protection is provided by the CC constant current mode.
However, if the CC mode fails it may cause serious damage to the test piece or to the
load. OLP is used to minimize the extent of the damage to the load. Switch off the
power supply as soon as this warning appears. To reset this warning, switch off the unit
and remove all loading and then switch the unit on again. If this problem persists,
please contact Extech Technical Support.
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382275/6-EU-EN v4.3 3/14