Extech Instruments 382276 Betriebsanweisung PDF herunterladen (Seite 10)

382275/6 V1.0 08/09

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Faults and Troubleshooting

OUP: Over Voltage Protection

This unit has a built-in tracking over voltage protection feature. In the event of

output voltage becoming greater than the set value (see specified range from

specifications table), protection will be triggered and the output power will be cut off.

(OUP warning appears)

To reset the warning, power off the unit and remove all loading. Power the unit back

on again to resume normal operation. If this problem persists, please contact

Extech Technical Support.

OTP: Over Temperature Protection

There is a thermo sensor inside of the unit to monitor and to prevent the unit from

overheating. The OTP warning will appear on the display and the output will switch

off. When this warning appears, switch off the unit and remove all loading.

Check the load and output setting. Allow the unit to cool for at least 30 minutes.

Check if the ventilation is blocked; check for clearance around the power supply.

Listen carefully for the short wind noise from the cooling fan when the unit is

powered up again.

If the fan is not heard upon power up, it may be faulty; please contact Extech

Technical Support.

OLP: Over Load Protection

Normally the overload protection is sustained by the CC constant current mode.

However, if the CC mode fails it may cause serious damage to the test piece or

load . OLP is used to minimize the extent of damage to the loads. Switch off the

power supply as soon as the warning appears.

To reset this warning, switch off the unit and remove all loading. Switch the unit

back on again and recheck with caution .

If this problem persists, please contact Extech Technical Support.

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Extech Instruments 382276 Betriebsanweisung Seite 10