Extech Instruments MG310 User Manual page 3

Warning

If the instrument exhibits faulty operation please discontinue use and have the instrument
serviced.

Be extremely careful when the instruments is measuring voltages that exceed 33V AC rms,
46.7V AC rms, or 70VDC; electrical shock is possible.

When high resistance measurements are conducted, stray electrical in circuits under test
must be discharged.

Do not replace the batteries when the instrument is wet.

Ensure secure connections with the test leads and the instrument's test lead terminals.

Shut the instrument down before opening the battery compartment.
Caution

Circuits under test must be completely discharged and isolated from power circuits before
taking resistance measurements.

If the test leads or adaptors need to be replaced due to damage, replace with test leads or
adaptors of the same model or electrical specifications.

Do not use the instrument if low battery indicator shows the low battery indicator. If the
instrument will not be used for a long period, please remove the battery and store safely.

Do not store or operate the instrument in areas of high temperature, high humidity, flame or
explosive potentials, or where strong electromagnetic fields exist.

Clean the instrument housing with a damp cloth and mild cleaning agent; do not use
abrasives or solvents.

If the instrument is wet, please dry before storing.
Electrical Safety Symbols
Risk of electrical shock
Double insulation or reinforced insulation
AC Measurement
Ground
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