Major tech MT473 사용자 설명서 - 페이지 13

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5. Operation

5.7 Measurement Point Illumination

Voltage testers are equipped with a measurement point illumination

feature. Thus, working under bad lighting conditions (e.g. division switch

cabinets) is made easier. Press button for measurement point illumination

(15) on instrument rear.

5.8 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.

5.9 Cleaning

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

instruments are dirty after daily usage, it is advisable 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.

5.11 Battery Replacement

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

display battery symbols on the screen, proceed with the battery

replacement.

• Completely disconnect voltage tester from the measurement circuit.

• Remove discharged screw , battery cover and batteries.

• Replace by new batteries, two type "AAA" by respecting correct polarity.

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