AC/DC CURRENT CLAMP
OPERATOR’S MANUAL
INTRODUCTION
The AC/DC Current Clamp is an accessory which will allow
your multimeter to measure electrical current up to 600
amperes DC/AC, with a frequency response up to 400Hz.
When measuring current with this clamp, there is no need to
break a circuit or to affect the isolation.
APPLICATION PROCEDURE
1. Insert the black banana plug into the COM jack and the
red banana plug into the V-
Ω
jack of any multimeter with a
minimum input impedance of 10k ohms.
2. Set the power switch from “Off” to “On” position, the green
LED will be lighting to indicate that the clamp is switched
on. For current measurement below 200 amperes, set the
multimeter range to 200mVAC for AC current measurements
or 200mVDC for DC current measurements. The reading
is directly in amperes. For current measurements above
200 amperes, set the multimeter range to 2V AC or DC,
depending on whether measuring AC or DC current. The
reading is now amperes x1000.
3. Turn the zero adjustment knob on the clamp until the
multimeter reads zero.
4. Clamp the jaws around the current-carrying conductor and
interpret the reading according to Step 2 above.
APPLICATION NOTES
1. In the case of DC current, the output is positive when the
current flows from the upside to the underside of the clamp.
The red banana plug is positive.
2. In the case of DC current measurement, a hysteresis effect
can occur so that it is impossible to zero the clamp properly.
To eliminate this effect, open and close the jaws several
times and then zero again.
