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試験装置 Major tech MT474のPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。Major tech MT474 12 ページ。 690v voltage tester

5.9. Maintenance

When using voltage testers in compliance with the instruction manual, no

particular maintenance is required. If functional errors occur during

normal operating, our service department will check your instrument

without delay.

Prior to cleaning, remove voltage test from all measurement circuits. If

the instruments are dirty after daily usage, it is advisable to clean them by

using a damp cloth and a mild household detergent. Never use acid

detergents or dissolvents for cleaning. After cleaning, do not use the

voltage tester for a period of approx. 5 hours.

The voltage testers must be calibrated periodically and checked by our

service department at regular intervals to ensure the specified accuracy of

measurement results. We recommend a calibration interval of one year.

If no signal sound is audible when short-circuiting the test probes,

proceed with the battery replacement.

Ÿ Completely disconnect voltage tester from the measurement circuit.

Ÿ Remove discharged screw, battery cover and batteries.

Ÿ Replace by new batteries, two type "AAA" (UM4 R03) by respecting

correct polarity.

Ÿ Close the battery cover and re-screw the screw.