Important Safety Information
Electric shock hazard:
• Unless measuring voltage, current, or frequency, shut off and lock out power. Make sure that all
capacitors are discharged. Voltage must not be present.
• Set the selector and connect the test leads so that they correspond to the intended measurement.
Incorrect settings or connections can result in a blown fuse.
• Using this unit near equipment that generates electromagnetic interference can result in unstable
or inaccurate readings.
Failure to observe these warnings could result in severe injury or death.
Electric shock hazard:
Do not change the measurement function while the test leads are connected to a component or
circuit.
Failure to observe this precaution may result in injury and can damage the unit.
Electric shock hazard:
Do not use the tester to measure voltages in circuits that could be damaged or activated by the
AutoCheck™ mode's low input impedance (approximately 3.0 kΩ and 150 pF).
Failure to observe this precaution may result in injury and can damage the unit.
Electric shock hazard:
• Do not attempt to repair this unit. It contains no user-serviceable parts.
• Do not expose the unit to extremes in temperature or high humidity. Refer to "Specifications."
Failure to observe these precautions may result in injury and can damage the unit.
DM-810A • DM-820A • DM-830A • DML-430A
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