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Martindale CM51A AC Mini Clamp Meter
  • Martindale CM51A AC Mini Clamp Meter
  • Martindale CM51A AC Mini Clamp Meter
  • Martindale CM51A AC Mini Clamp Meter

Martindale CM51A 300A AC Mini Clamp Meter

Supplied with soft case, battery and CM51A instruction manual.

£58.65 Save 15%
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This low cost, auto ranging clamp meter has a jaw diameter of 27mm and is a useful tool for electrical, mechanical and engineering applications. The CM51A clamp has a useful Data-hold feature to freeze the displayed value when used in difficult to access locations where the display may be difficult to read. There is also an auto power off function and the Martindale CM51A clamp is supplied with a manual, battery and a soft carry case.


Auto-ranging (40 A and 300 A).
Pocket-sized, compact body.
Large, 4000 count LCD.
Display Hold.
Auto Power Off.
Safety Design. CE mark approved.

Martindale CM Series Clamp Meter choices

Martindale CM51A Specifications
Numeric Display 3¾ digit, 4000 count LCD, maximum reading 4000, 12 mm high.
Unit and Symbols ˜, A, DH, BAT, AUTO, APO and decimal point.
Operating Principle Dual Slope Integration.
Range Selection Autoranging.
Overrange Indication OL symbol is shown.
Battery Warning BAT symbol is shown.
Sampling Rate 2.5 times per second.
Display Hold Displays are held by DH key.
Overload Protection AC current; 400 A AC (300 V Line) for one minute.
Operating Temperature and Humidity 0°C to 40°C, less than 80% RH.
Storage Temperature and Humidity -10°C to 50°C, less than 70% RH.
Temperature Coefficient 0.1 x specified accuracy / °C for 0°C to 18°C & 28°C to 40°C.
Dielectric Strength 3.7 kV AC for one minute (between case & metal parts).
Safety EN 61010-1, EN 61010-2-032 Overvoltage Cat. III 300 V, Class II.
EMC EN 50082-1:01.92 & EN 55022:08.94 + A1:05.95 + A2:97.
Power Consumption Approx. 5 mW (100 hours continuous operation).
Power Supply 1 x 3V CR2032 Battery.
Auto Power Off Automatically after 12 minutes.
Conductor Diameters Maximum 27 mm.
Measurement Range (AC Current) 40 A, 300 A.
Measurement Resolution 10 mA, 100 ma.
Accuracy ±1.8%rdg±5dgt.
Max. Input Current 300 A (Max. 300 V).
Dimensions 150 x 52 x 24 mm.
Weight 110 grams.
Martindale CM51A warranty One-year.


Martindale CM51A Datasheet

PDF Specifications of the Martindale CM51A 300A AC Mini Clamp Meter.

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Martindale CM51A 300A AC Mini Clamp Meter

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