Common Sense Safety Tips for Digital Multimeter
Guidelines For The Sensible Use Of A Digital Multimeter
- Make sure you know your
company's test procedures and safety requirements.
- Be familiar with National Electric Code.
- Ensure the meter is in good working condition. Look for any
outward visible signs of damage or malfunction.
- Make sure the battery is good. Always replace battery
immediately when a meter's low battery indicator is displayed. A low battery may cause
inaccurate readings and may cause potential safety concern.
- Check fuses for correct type and voltage/amperage values
and that the fuses are not blown.
- Make sure the meter has a valid calibration sticker.
Ensure regular calibration of meter. (Typically once/year. However; your
company's procedure might require calibration more frequently.)
- Ensure test leads are in good condition with no visible signs
of aging such as cracks or splits in the insulation. (Consider yearly lead replacement
to prevent high voltage leakage and failure)
Test leads by shorting them together in low ohm range
to check leads continuity.Ensure leads are in the correct input jack for measure
and that you have selected correct range and meter setting. Reading
a voltage measurement while leads are in the "Amp" input jacks will
cause severe instrument damage and could cause harm or even death to operator. (This
applies to all Digital Multimeters measuring voltage or current)Be certain that the correct range is selected before connecting
the test leads to the voltage source to be measured. When in doubt about which range
to use start measuring with the highest possible range.When measuring current the meter must be in series
with the load.When diagnosing noise problems on an AC line, monitor the line
current instead of line voltage using an AC current clamp accessory or an AC clamp
meter.Always discharge capacitors by shorting their leads together
before connecting them to the leads of the meter. Always use common sense when using a Digital Multimeter.When in doubt read the manual or call the manufacture. When measuring high voltages we suggest to avoid
working alone as much as possible. Someone should be nearby to render aid
if necessary. Training in CPR (cardio-pulmonary resuscitation) first aid is highly
recommended.
