terminals or between any terminal and grounding.
The rotary switch should be placed in the right
position and no any changeover of range shall
be made during measurement is conducted to
prevent damage of the Meter. Must disconnect
the connection between the test leads and the
tested circuit before changing the measurement
position of the rotary switch.
During measurement, do not contact naked wire,
connector, un-used input terminal or the circuit
in used.
When the Meter working at an effective voltage
over 60V in DC or 30V in AC, special care should
be taken for there is danger of electric shock.
Use the proper terminals, function, and range for
your measurements.
If the value to be measured is unknown, use the
maximum measurement position.
Do not use or store the Meter in an environment
of high temperature, humidity, explosive,
inflammable and strong magnetic field. The
performance of the Meter may deteriorate after
dampened.
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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 and diodes.
Before measuring current, check the Meter’s fuses
and turn off power to the circuit before connecting
the Meter to the circuit.
When under battery operated situation, 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.
When servicing the Meter, use only the same
model number or identical electrical specifications
replacement parts.
The internal circuit of the Meter shall not be altered
at will to avoid damage of the Meter and any
accident.
Soft cloth and mild detergent should be used to
clean the surface of the Meter when servicing.
No abrasive and solvent should be used to prevent
the surface of the Meter from corrosion, damage
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Model DM-442B: OPERATING MANUAL
www. .com information@itm.com1.800.561.8187
