The Extech CA250 400 Amp AC/DC Clamp-On MultiMeter Adaptor is a clamp adaptor that can measure current by simply clamping around a single conductor. The adaptor outputs an mV signal that is proportional to the measured current and displayed on a DMM.
The Extech CA250 is a clamp-on adaptor designed to measure AC or DC current by clamping around a single conductor. It outputs a millivolt (mV) signal proportional to the measured current, which is then displayed on a connected Digital Multimeter (DMM). The device features two measurement ranges: 0 to 40 Amps and 0 to 400 Amps, with corresponding output sensitivities of 10mV/Amp and 1mV/Amp respectively.
| Measurement Ranges | 0 to 40 Amps AC/DC, 0 to 400 Amps AC/DC |
|---|---|
| Adaptor Output | 10mV/Amp on the 0 to 40A range, 1mV/Amp on the 0 to 400A range |
| Frequency range | 50/60Hz |
| Accuracy (0 to 40A) | ± (2.5% + 0.1A) |
| Accuracy (0 to 400A) | ± (2.8% + 0.5A) |
| Jaw size | 1.2" (30mm) |
| Operating Conditions | 32 to 122°F (0 to 50°C), < 70% RH |
| Battery | 2 – 1.5V “AAA” |
The output is 10mV/Amp on the 0 to 40A range.
The output is 1mV/Amp on the 0 to 400A range.
With no conductor in the jaw, adjust the DC Zero adjust until the DMM display indicates zero.
Yes, it includes an NCV detector that illuminates an LED if AC voltage is present on a conductor.