Major tech MT473 사용자 설명서 - 페이지 10

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5. Operation

5.1 Preparing the test

• Prior to every test, please ensure that the instrument is in perfect

condition:

• For example, keep an eye out for a broken housing or leaking batteries.

• Always carry out a function test before using the voltage tester, see

below.

• Check that the instrument is functioning properly(for example at a known

voltage source)before and after every test.

• If the safety of the user can not be guaranteed, switch oﬀ the instrument

and secure it to prevent unintentional usage.

•

Carrying out a function test

•When press "Autotest" button, with the exception of the LED for low

impedance test, all LEDs should light up. If the battery voltage is too low,

all leds will blink, please replace the battery

5.2 Preparing the test

• Connect both test probes with power source.

• As from a voltage of > 6V the voltage tester

switches on automatically.

• The voltage is displayed via LEDs.

• The diﬀerent indicating signals of the voltage

detector (including the ELV lim indication)are not

to be used for measuring purposes.

• For AC voltage, the "AC" is illuminated.

• For positive voltage, the "+" is illuminated.

• For negative voltage, the "-" is illuminated.

• In the case of DC voltage, the polarity of the

indicated voltage relates to the voltage tester probe tip

• Once the safety extra-low voltage (50V AC /120V DC) is reached or

exceeded, the "

main circuit failure, an acoustic signal is emitted.

" is illuminated, in the event of no battery power or