ASTROAI USER MANUAL
DIGITAL MULTIMETER
NOTE: Fully read and understand this manual before using this instrument.
● The meter can not be used to test AC current and can not be used to test AC voltage
like the voltage of RECEPTACLE WHEN the dial is located in the DC current range.
● When the Meter is working at an effective voltage over 60V in DC or 30V rms in AC,
special care should be taken because there is a danger of electric shock.
● Before using the Meter, inspect the exterior casing. Do not use the Meter if it is damaged
or if all or part of the exterior casing is removed. Look for cracks or missing plastic. Pay
special attention to the insulation around the connectors.
● If you have mistakenly connected the red leads to the 500mA selection, then used this m
eter to test larger current(like 10A) or higher voltage, it might probably burn out the wires
even the meter.
● If you are the beginner, you should have known some basic physical concecpts and
basic methods of using a meter, you also should have read the user manual carefully
and known the consequences of misuse because any misuses will probably cause
serious results.
WARNING: To avoid possible electric shock or personal injury, and to avoid possible damage to
the Meter or to the equipment being tested, adhere to the following rules:
● Before using the Meter, inspect the exterior casing. Do not use the Meter if it is damaged
or if all or part of the exterior casing is removed. Look for cracks or missing plastic. Pay
special attention to the insulation around the connectors.
● Inspect the test leads for damaged insulation or exposed metal. Check the test leads for
continuity.
● Do not apply more than the rated voltage, as marked on the Meter, between the
terminals or between any terminal and grounding.
● The manual rotary switch should be placed in the correct position before measurement
and should NOT be moved during measurement to prevent damage to the Meter.
● When the Meter is working at an effective voltage over 60V in DC or 30V rms in AC,
special care should be taken because there is a danger of electric shock.
● Use the proper terminals, function, and range for your measurements.
● Do not use or store the Meter in a high-temperature environment, do not expose to high
levels of humidity, or near strong magnetic fields. The performance of the Meter may
deteriorate after dampening.
● When using the test leads, keep your fingers behind the finger guards.
● Disconnect circuit power and discharge all high-voltage capacitors before testing
resistance, continuity, diodes or hFE.
● Replace the battery as soon as the battery indicator appears. With a low battery, the
Meter might produce false readings that can lead to electric shock and personal injury.
● Remove the connection between the testing leads and the circuit being tested, and turn
the Meter power off before opening the Meter case.
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