Velleman DVM850BL User Manual - page 3
DVM850BL GB
2
3. DURING USE
• Never exceed the limit value for protection. This limit value is listed separately in the
specifications for each range of measurement.
• Do not touch unused terminals when the meter is linked to a circuit which is being tested.
• Never use the meter with category II installations when measuring voltages that might
exceed the safety margin of 600V above earth ground.
• Set the range selector at its highest position if the intensity of the charge to be measured is
unknown beforehand.
• Disconnect the test leads from the tested circuit before rotating the range selector in order to
change functions.
• When carrying out measurements on a TV set or switching power circuits, always remember
that the meter may be damaged by any high amplitude voltage pulses at test points.
• Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your
fingers behind the probe barriers at all times during measurement.
• Before attempting to insert transistors for testing, always verify if the test leads have been
disconnected.
• Components should not be connected to the hFE socket while test leads are being used to
execute voltage measurements.
• Never perform resistance measurements on live circuits.