Introduction
The CA30 Clamp-On Adapter is designed to measure AC and DC
current. It can be used with most digital multimeters having a 200mV
and 2V AC/DC or 400mV AC/DC range.
Features include
• Measure 0-40 amps and 0-400 amos AC or DC
• Low battery indication
• DC amp zero adjust knob
Specifications
Measuring AC Current
1. Observing the polarity markings on the CA30 connector,
plug the test lead into the input jacks on your digital
multimeter. The
"-"
on the CA30 connector plugs into
the
"COM"
jack and the
"+"
plugs into the
"V/
Ω
"
jack on
your multimeter.
2. Set your digital multimeter to one of the following ranges:
• 200mV AC for measuring 0 to 40ACA
• 2V AC for measuring 0 to 400ACA
• 400mV AC for measuring 0 to 40 or 0 to 400ACA
3. Clamp the jaw of the CA30 around a single current
carrying wire.
NOTE:
Clamp around only one wire at a time. If the
CA30 is clamped around two or more wires, it will not
work properly.
4. Take the reading directly from the digital multimeter's display.
NOTE:
1mV = 1A
Measuring DC Current
1. Observing the polarity markings on the CA30 connector,
plug the test lead into the input jacks on your digital
multimeter. The
"-"
on the CA30 connector plugs into
the
"COM"
jack and the
"+"
plugs into the
"V/W"
jack on
your multimeter.
2. Set your digital multimeter to one of the following ranges:
• 200mV DC for measuring 0 to 40DCA
• 2V DC for measuring 0 to 400DCA
• 400mV DC for measuring 0 to 40 or 0 to 400DCA
3. Turn the CA30 to the 40 or 400 range. Turn the zero adjust
knob on the CA30 until the display on the multimeter
reads zero.
4. Clamp the jaw of the CA30 around a single current wire.
NOTE:
Clamp around only one wire at a time. If the CA30
is clamped around two or more wires, it will not work properly.
5. Take the reading directly from the digital multimeter's display.
NOTE:
1mV = 1A
Low Battery Indication
When the low battery indicator illuminates, replace the battery as soon
as possible. A low battery can adversely affect readings.
Low Battery Indication
1. Low or dead battery
2. Digital multimeter is not set on the correct range
3. Test lead is plugged into the correct input jacks on the multimeter
Measuring Ranges
AC Amps
0-40A on 200mV or
400mV AC range
DC Amps
0-400A on 2V or
400mV AC range
AC Amps
1mV AC per 1A AC
DC Amps
1mV DC per 1A DC
40A
±(1.5% of r2
least significant digits)
400A
±(1.5% of r4
least significant digits)
Output
Accuracy
Operating Temperature
+32˚F to 122˚F (0˚C to 50˚C)
Low battery indicator
CA30-MAN
P. 1
