User`s guide

2 Making Measurements
Measuring AC or DC Current
72 U1273A/U1273AX User’s Guide
Measuring AC or DC Current
Set up your multimeter to measure AC or DC current as
shown in Figure 2- 32 and Figure 2- 33. Open the circuit path
to be tested. Probe the test points, and read the display.
Table 2- 1 7 Rotary switch positions allowing current measurements
Legend Default function Function when is pressed
DC A (or mA)
Cycles between
• AC A (or mA),
• AC+DC A (or mA)
• % Scale of 4-20 mA (or 0-20 mA),
or
• DC A (or mA)
DC µA
Cycles between
• AC µA,
• AC+DC µA, or
• DC µA
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WARNING
Never attempt an in-circuit current measurement where the
open-circuit potential to earth is greater than 1000 V. Doing so will
cause damage to the multimeter and possible electric shock or
personal injury.
CAUTION
To avoid possible damage to the multimeter or to the equipment under
test:
• Check the multimeter’s fuses before measuring current.
• Use the proper terminals, function, and range for your
measurement.
• Never place the probes across (in parallel with) any circuit or
component when the leads are plugged into the current terminals.