PDI CA-400D
AC/DC CURRENT CLAMP
OPERATOR’S MANUAL
International Safety Symbols
This symbol, adjacent to another symbol or
terminal, indicates the user must refer to the
manual for further information.
SAFETY NOTES
：
•
Do not exceed the maximum allowable input
range of any function.
•
Set the function switch OFF when the meter is not
in use.
INTRODUCTION
The AC/DC Current Clamp is a transducer which will
allow your multimeter to measure electrical and/or
electronic current up to 400 amperes AC/DC, with a
frequency response to 50/60Hz. There is no need to
break a circuit or to remove the insulation when
measuring current with this clamp.
When measuring DC current, the CA-400D offers the
user “zero” adjustment by turning the
DC ZERO
knob on the clamp probe.
NOTE
:
Keep the clamp jaw closed around wire/cable,
to ensure the accurate readings during current test.
MEASURING CURRENT
1.
Insert the black banana plug into the COM jack
and the red banana plug into the V jack of any
multimeter with a minimum input impedance of
10k ohms.(OUTPUT and V jack link)
2.
Set the power switch from “OFF” to the desired
range, 40A (output: 10mV/A) or 400A (1mV/A)
position. The green LED will light to indicate
that the clamp is switched on.
3.
For current measurement below 40A, set the unit
to 40A range and set the multimeter to 400mV or
600mV AC range for AC current measurements,
or 400mV or 600mV DC range for DC current
measurements. If the measured current exceeds
40A, set the unit to 400A range.
4.
When measuring DC current, always turn the
zero adjustment knob on the clamp until the
multimeter reads zero, before taking your
measurement.
5.
Clamp the jaws around the current-carrying
conductor and interpret the reading according to
Step 3 above. For more detail, refer to section
below.
HOW TO INTERPRET READINGS
When 40A range is selected, the measured current
value in Amps if the multimeter reads 100mV, is
100mV/(10mV/A)=10A. To simplify that, move the
decimal point one position to the left.
When 400A range is selected, the measured current
value in Amps if the multimeter reads 100mV, is
100mV/(1mV/A)=100A. To simplify that, the mV
reading is equal to the Amp reading.
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 (OUTPUT aperture).
2.
In the case of DC current measurement, a
hysteresis effect can occur making it impossible
to zero the clamp properly. To eliminate this
effect, open and close the jaws several times then
turn zero adjustment knob.
Non-Contact AC Voltage Measurements
WARNING:
Risk of Electrocution. Before use,
always test the Voltage Detector on a known live
circuit to verify proper operation
