Chapter II
26
DMM230
1.
Insert the black test lead banana plug into the
negative
COM
terminal.
2.
For current measurements up to 6000µA AC, set
the function switch to the
µA
position and insert
the red test lead banana plug into the
µA/mA
terminal.
3.
For current measurements up to 600mA AC, set
the function switch to the
mA
position and insert
the red test lead banana plug into the
µA/mA
terminal.
4.
For current measurements up to 20A AC, set the
function switch to the
10A
position and insert the
red test lead banana plug into the
10A
terminal.
5.
Press the
MODE
key to display “
AC
” on screen.
6.
Remove power from the circuit to be tested, then open the circuit
at the point where you wish to measure current.
7.
Apply test probes to the points of the circuit to be tested.
8.
Apply power to the circuit.
9.
Read the current in the display.
10.
Press the
Hz%
key to display “
Hz
”.
11.
Frequency measured is displayed on screen.
12.
Press the
Hz%
key again to display “
%
”.
13.
Duty cycle is displayed in percentage.
14.
Press the
Hz%
key to return to current measurement.
3.7 Resistance measurements
To avoid any risk of deterioration, remove power from the
circuit to be tested before making resistance measurements.
