Example of DCA range
measurement
5-11-2 Measurement using the DC/AC current probe (CL-22AD)
Maximum measurable current: DC/AC 200 A
1) Measurement target
ACA: Measurement of AC sine wave of 50-60 Hz, such as the
current consumption of a home appliance or power supply equipment.
DCA: Measurement of the current drain of the electrical
circuitry of an automobile or other DC devices.
2) Measurement ranges
Two for each of ACA and DCA (20 A and 200 A).
3) Measurement procedure
Connect the red plug of the current probe to the + measure-
ment terminal and the black plug to the COM (−) terminal.
Set the function switch of this instrument (CD732) to “DCV”
for DCA measurement or “ACV” for ACA measurement.
Set the range hold button to the DC 600 mV range for DCA
measurement or the AC 6 V range for ACA measurement.
Set the range setting knob of the current probe to the 20 A or
200 A range.
* In the case of DCA measurement, turn the zero adjustment
knob of the current probe so that this instrument (CD732)
displays “000.0 mV”.
Open the iron core of the current probe and clamp the
measurement target conductor with it.
Read the displayed value by multiplying it as shown below.
The unit of the obtained value is A (ampere).
DC 20 A → 0.1x AC 20 A → 100x
DC 200 A → 1x AC 200 A → 1000x
After the measurement, open the iron core of the current
probe and disconnect it from the measurement target conductor.
Set the power switches of this instrument (CD732) and probe
(CL-22AD) to OFF.
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