Major tech MT478 Посібник користувача - Сторінка 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

• Connect the voltage tester probe tips for 4 to10 seconds and then

disconnect.

• All LEDs should light up and the indicator probe side vibrates. All

segments are illuminated on the LCD display.

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.

• The voltage is also shown on the LCD display.

• 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.

• Once voltage is applied to the measuring instrument, press the HOLD

button, the LCD and LEDs display shows the recorded reading.

• To delete the recorded value, press the HOLD button once again. The

LCD and LED displays once again indicates the voltage currently

being applied to the probe tips.

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