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300 AMP AC CLAMP ADAPTOR
OUTPUT VOLTAGE:1mV AC Per 1A AC
CATII600V
CA300
User’s Guide
Model CA310
300A AC Current Clamp-on
MultiMeter Adaptor
Introduction
Congratulations on your purchase of the Extech CA310 300 Amp AC Clamp-On MultiMeter
Adaptor. With this clamp adaptor an AC current can be safely measured by simply clamping
around a single conductor. The adaptor outputs an AC mV signal that is proportional to the
measured AC current. The DMM mV reading (times 10) is equivalent to the value of the AC
current. Careful use of this device will provide years of reliable service.
Specifications
Sensor type Induction coil
Measurement Range 0.1 to 300 Amps AC
Adaptor Output 10mV AC output to DMM per 1A AC measurement
Frequency range 50/60Hz
Working voltage 600V CAT II (IEC 1010-1)
Maximum output impedance
45Ω
Accuracy ± (3.0% + 10mV) for readings less than 50A
± (2.0% + 5mV) for readings greater than 50A
Temperature coefficient 0.2 times the specified accuracy per
o
C < 18
o
C or > 28
o
C
Jaw size 1.2" (30mm)
Operating Conditions 32 to 122
o
F (0 to 50
o
C) < 80% RH
Dimensions/Weight 3.2 x 6.1 x 1.4" (80 x 156 x 35mm); 7.8 oz. (220g)
NOTE: Accuracy is specified for a period of one year for ambient conditions 64
o
F to 84
o
F
(18
o
C to 28
o
C) < 80% RH.
Safety
Safety Symbols
This symbol, adjacent to another symbol or terminal, indicates the user must
refer to the manual for further information.
This symbol indicates that double insulation is used.
WARNING: This indicates that a potentially hazardous condition which, if not avoided,
could result in death or serious injury.
Safety Precautions
1. WARNING: Improper use of this meter can cause damage, shock, injury or death.
Read and understand this manual before operating the meter.
2. Inspect the condition of the test leads and the meter itself for any damage before
operating the meter. Repair or replace any damage before use.
3. Do not use on non-insulated conductors at voltages greater than 250VAC rms or DC.