Aktakom AM-1108 User Manual page 20

Measuring Current (See Figure3-11, Figure3-12)
 Never attempt an in-circuit current measurement where the open-circuit potential to earth is greater
than 1000 V. You may damage the meter or be injured if the fuse blows during such a
measurement.
 You must open the circuit under test, then place the meter in series with the circuit.
To avoid possible damage to the meter or to the equipment under test, check the meter'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.
To measure ac or dc current, proceed as follows:
1. Insert the black lead into the COM terminal. Insert the red lead in an input appropriate for the measurement range as
shown in Table 3-1.
2. When using A jack, set the rotary switch on
if the current is less than 4000µA and
3. The meter is preset to direct current, and the screen shows "DC "; Press blue pushbutton（ ） once to select alternating
current measurement and the screen shows "AC ".
4. Open the circuit path to be tested. Touch the red probe to the more positive side of the break; touch the black probe to
the more negative side of the break. Reversing the leads will produce a negative reading, but will not damage the meter.
5. Turn on power to the circuit, and read the measuring results from the screen.
6. Press to toggle between the frequency and duty cycle ratio of the signals under test.
7. Turn off power to the circuit and discharge all high voltage capacitors. Remove the meter and restore the circuit to
normal operation.
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See Figure3-10. Capacitance Measurement
Warning
Caution
position; When using mA µA jack, set the rotary switch on
position if the current is more than 4000µA.
Table 3-1.Current Measurement
Rotary Switch Input
mA
µA
- 19 -
Ranges
4.000A
A
10.00A
40.00mA
400.0mA
400.0µA
4000µA
position