the 600 (or highest) range if measuring a mains supply. Always set the knob for AC Voltage measurement before inserting the probes. If resultant is much lower, then the range can be reduced to provide a more accurate reading. Finally make sure the mains is OFF, insert the probes into the socket then switch the socket ON and measure the a.c. Voltage.
Fluke DMM measuring the d.c. Voltage of a 1.5V battery.
AC Voltage WARNING: Measure AC Voltage with extreme caution and supervised unless competent and trained in the use of the DMM. Make sure that the leads are insulated and properly inserted into the Multimeter ports without any exposed metal. Do not touch the probes by the tips. AC MAINS CAN KILL. If AT ALL in doubt, do not use the DMM for AC Mains Voltage measurement.
Fluke DMM measuring a.c. mains from a Clover leaf Mains lead.
Measuring Current To measure current, the DMM needs to be part of the circuit and therefore connected in series, so the same current flows though the DMM as does through the circuit. The Ammeter section of the DMM is indicated by the symbol ‘A’. An important point to note is that most DMM’s can only measure d.c. Current, so there will be a straight line adjacent to the A to indicate DC Current measurement.
The sinewave ( ∿ ) adjacent to the “V” is to measure a.c. Voltage. Make sure the leads are connected to the DMM correctly. Set the knob to a.c. Voltage Measurement (V ∿ ), select
The Fluke however can measure a.c. Current also.
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CAI Feedback Spring 2024
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