B. DC or AC Current Measurement (See figure 4)
Warning
Before connect the Meter in serial with the tested
return circuit, close the return circuit’s current to avoid
the dangerous of sparking.
If the fuse burns out during measurement, the Meter
may be damaged or the operator himself may be hurt.
Use proper terminals, function, and range for the
measurement. When the testing leads are connected
to the current terminals, do not parallel them across
any circuit.
To measure current, do the following:
18
Model UT803: OPERATING MANUAL
1.
2.
3.
4.
Insert the red test lead into the µA mA terminal and
the black test lead into the COM terminal.
Set the rotary switch to an appropriate measurement
position in µA , mA or A , press SELECT button
to select AC or DC measurement mode.
Connect the test leads in serial with the object being
measured. The measured value shows on the display.
AC measurement displays True RMS value.
Press AC/AC+DC button to measure AC+DC
current’s true RMS
(Figure 4)