The compact Extech 380942 is a 30A mini AC/DC clamp meter with a remarkable 0.1mA resolution (AC), very low-current sensitivity, and small diameter jaw designed to reach into small areas. The 30A range with 0.1mA (AC) and 1mA (DC) resolution is optimized for finding problems where very low current variances would be missed by standard clamp meters. This mini clamp meter is useful for troubleshooting tasks in plant maintenance, electrical, HVAC, and telecom work, as well as residential electrical, fleet maintenance, marine, and motorcycle repairs.
It can be very difficult to make accurate current and voltage readings in industrial and commercial applications when electronic devices are present. Fluorescent lights, motor drives, computer power supplies, and other electronic systems can distort the AC waveform, making it hard for averaging meters to get an accurate read. True RMS uses a more advanced formula to adjust for this kind of distortion.The Data Hold function freezes the display while the Min/Max function tracks and displays minimum and maximum values – useful for blind measurements and start-up draw. The Zero function makes it easy to perform relative measurements. The 4-digit (4,000-count) readout is easy to read and a 40 segment bargraph helps simulate an analog display, better illustrating swings in readings. Whether you are checking amp draws on commercial electrical circuit or troubleshooting a truck’s alternator, the small 0.9" (23mm) jaw opening is compact enough to fit in tight locations like engine bays.
Measuring 7.2 x 2.5 x 1.4" (H x W x D), this CAT III-rated True RMS mini clamp meter comes with test leads, two AAA batteries, soft carrying case, and user manual. NIST certification is also available for this product.