Datasheet
PRODUCT DATASHEETPRODUCT DATASHEET
MA140/MA145 True RMS 300A
Mini Clamp Meters + NCV
Choice of AC Current or AC/DC Current model with 0.8" (22mm) jaw size and high accuracy. Smart Auto Sense feature enables
the MA145 to recognize the input (within a given function) and automatically switch to the correct mode of operation (i.e. AC to
DC Current measurement). Built-in Non-Contact Voltage (NCV) Detector allows for quick detection of live voltage.
Features
• True RMS for accurate readings of noisy, distorted or
non-sinusoidal waveforms
• Model MA140 — AC Current
Model MA145 — AC/DC Current and Zero function for
accurate DC measurements
• Compact 0.8" (22mm) jaw size accommodates
conductors up to 300MCM and allows measurements
in tight locations
• Unique Smart Auto Sense feature
• Low Pass Filter (LPF) for accurate measurement of
variable frequency drive signals
• Built-in Non-Contact Voltage (NCV) detector
• Inrush current measurement
• 6000 count backlit LCD display
• Smart Data Hold: Audiovisual alert when a new
reading exceeds 50 digits of a held reading
• Low battery indicator and Auto Power Off feature
• CAT III-600V safety rating
• Complete with carrying case and two LR44 batteries
Ordering
MA140 N ........ True RMS 300A AC Mini Clamp Meter+NCV
MA145 N ........ True RMS 300A AC/DC Mini Clamp Meter+NCV
www.extech.com
Specifications subject to change without notice. Copyright © 2015 FLIR Systems, Inc. All rights reserved including the right of reproduction in whole or in part in any form.
Rev. 6/5/15
Specifications
MA140 MA145
AC Current (max resolution) 60A, 300A (0.01A) 60A, 300A (0.01A)
DC Current (max resolution) — 60A, 300A (0.01A)
Basic accuracy ±2.0% AC: ±1.5%, DC: ±1.5%
Non-Contact Voltage (NCV) 80 to 600V 80 to 600V
Dimensions 5.8x2.4x1.2" (147x60x31mm) 5.8x2.4x1.2" (147x60x31mm)
Weight 4.9oz (140g) 4.9oz (140g)
MA140 UPC Code: 793950371404
MA145 UPC Code: 793950371459
Model MA140
AC Current
Model MA145
AC/DC Current
N Indicates products that are available with optional calibration traceable to NIST. Order with -NIST after part number for product plus Calibration Certificate.