Specifications - Extech Instruments MA145 User Manual

Specifications
ELECTRICAL SPECIFICATIONS
Function
AC Current
Function
DC Current
Function
Low Pass Filter
(LPF)
Function
Inrush Current
Voltage
Detector
Notes:

Clamp position error: ±1.5% of reading

Accuracy is given as ± (% of reading + least significant digit) at 23C ±5C with relative humidity
lower than 80%. Accuracy is specified for a period of one year after calibration.

ACA specifications are for AC Coupled, True RMS. For square wave the accuracy for >100Hz is
unspecified.
For non‐sinusoidal waveforms, additional accuracy Crest Factor (C.F.) considerations exist as
detailed below:
Add 3.0% for C.F. 1.0~2.0
Add 5.0% for C.F. 2.0~2.5
Add 7.0% for C.F. 2.5~3.0
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Range Resolution
60.00 A 0.01
300.0 A 0.1
Range Resolution
(1)
60.00 A 0.01
300.0 A 0.1
(1) < 0.3A variation when measuring in varying directions
Add 10d to accuracy in AUTO AC/DC sense mode
(2)
Range Resolution
60.00 A 0.01
300.0 A 0.1
Cut‐off frequency (‐3db): 160Hz (approximately)
Attenuation characteristic: ‐24db per octave (approximately)
Range Resolution
300.0 A 0.1
Integration time: 100ms
Trigger current (threshold): 5A
80V~600VAC n/a
The tip of the clamp offers the optimum sensitivity
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50~100Hz
± (1.5% + 25 digits) < 3A
± (1.5% + 5 digits) ≥ 3A
Accuracy (of reading) 50Hz/60Hz
± (3.5% + 25 digits) < 3A
10
Accuracy (of reading)
100~400Hz
± (2.5% + 25 digits) < 3A
± (2.5% + 5 digits) ≥
Accuracy (of reading)
(2)
± (1.5% + 10 digits)
± (1.5% + 5 digits)
± (3.5% + 5 digits) ≥ 3A
Accuracy (of reading)
± (3.5% + 5 digits)
n/a
MA145‐en‐GB_V1.1 5/15
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3A