PC/CP200 Electronics Lab I
Measuring DC Voltage

Measuring DC Voltage
with DMM		 caution
Do not ground yourself when taking measurements.
Do not touch exposed circuit elements or probe tips.
Exercise extreme caution when measuring voltages in excess of 20V.
Measures taken with circuit under power.

dmm voltage
  1. Connect the meter's Red lead to V Ω  input.
  2. Connect the meter's Black lead to COM input.
  3. Set the function/range switch to dmm voltage symbol  (DC voltmeter) and select the appropriate measurement range (for meters that have more than one range). If you do not know the appropriate measurement range, start at the highest range. For the meter shown to the left, the lowest measurement range is 200 mVolts and the highest is 1000 Volts. The measurement range indicator shows the maximum of the range. For example, if you select 20, the measurement range is 2 to 20 Volts.
  4. Place probe tips across or in parallel with the component(s) to be measured. Do not touch the component or the probe tip with your hands.
  5. Read the voltage and polarity on the display and adjust for the range.
    • If display indicates an overload, remove probes immediately and select a higher range.
    • Overload indicates a dangerous condition in the dmm dc voltage symbol  range.
  6. Turn the meter off when measurements are complete.

 

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