The RS232-USB interface and internal circuit of this instrument are non-isolated interfaces. It is strictly prohibited to connect the computer when testing the voltage, otherwise the instrument will be burned or electric shock accident will be caused. The voltage test line must be pulled out of the meter before connecting the RS232-USB data line to the computer to read the data. The on-line monitoring in the instruction manual is not suitable for monitoring voltage.

Pay attention to the label text and symbols on the instrument panel and back plate.

Before use, the instrument and accessories shall be confirmed to be in good condition without damage, exposure or disconnection.

It cannot be used to test voltages higher than 600V.

It is forbidden to use the instrument back cover and battery cover plate if they are not properly covered.

Make sure that the connection plug of the lead is tightly inserted into the interface.

Do not use or replace the battery when the meter is wet.

Testing in flammable and hazardous locations is prohibited.

The test line must be removed from the wire to be tested before it can be pulled out from the instrument. Do not touch the input jack to avoid electric shock.

Do not use in a strong electromagnetic environment to avoid affecting the normal operation of the instrument.

Do not operate 2 or more keys at the same time, the operation will be invalid.

When the metal is exposed due to the breakage of the casing or test line during the use of the instrument, please stop using it.

Do not place and store the instrument for a long time in places with high temperature, humidity, condensation and direct sunlight.

The instrument and current jaws must be regularly maintained and kept clean, and the jaws cannot be wiped with corrosive agents and rough objects.

Avoid impact on the current clamp, especially on the jaw joint surface.

The instrument has automatic shutdown function.

If you do not use this instrument for a long time, please remove the battery and replace the battery. Please pay attention to the polarity of the battery.

Pay attention to the measurement range and operating environment specified by this instrument.

The use, disassembly, calibration and maintenance of this instrument must be operated by authorized personnel.

If the instrument is dangerous due to its continued use, it should be stopped immediately and sealed immediately for handling by an authorized institution.

Safety warning signs in the manual, the user must be in accordance with the contents of this manual for safe operation.

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