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Martindale CM55 AC Clamp Meter

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  • Measures AC current from 0 to 400A with 0.01A resolution and ±1.9% accuracy
  • AC/DC voltage measurement from 0 to 600V and resistance range from 0 to 400Ω
  • Maximum clamping diameter of ø25mm via sprung jaw clamp

rrp £85.00

now £59.50 (Ex. VAT) £71.40 (Inc. VAT)

rrp £85.00


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  • Description

    Martindale CM55 AC Clamp Meter

    The Martindale CM55 AC Clamp Meter is a basic clamp meter that can measure AC current from 0 to 400A, AC/DC voltage from 0 to 600V and resistance from 0 to 400Ω as well as performing a continuity test. The movable jaws can clamp around conductors with a maximum diameter of ø25mm and all the readings are provided with a high degree of accuracy (±1.9% ± 3 for current) and excellent resolution (±0.01A for current).

    The measurement function is selected using the simple thumb dial and a trigger that opens and closes the sprung clamps. Readings are displayed on the digital LCD screen and it has a display hold function which freezes the reading on screen. The unit is supplied with TL16 test leads and a soft case and is rated as Cat III 600V.

    Martindale part number: MARCM55

    Key Features

    • AC current range: 0 to 400A
    • AC current accuracy: ±1.9% ± 3
    • AC current resolution: ±0.01A
    • AC/DC voltage range: 0 to 600V
    • Resistance range: 0 to 400Ω
    • Continuity test
    • Clamping diameter: ø25mm
    • LCD display
    • Cat III 600V
    • Two-year warranty


  • Specification

    AC Current

    • AC A: 40.00A / 400.0A (50-400Hz)
    • Accuracy: ± 1.9% ± 3dgt (50-60Hz)

    AC Volts

    • 400.0V / 600V (50-400Hz)
    • Accuracy: ± 1.9% ± 3dgt (50-60Hz)

    DC Volts

    • 400.0V / 600V
    • Accuracy: ±1% ± 2dgt


    • 400.0Ω
    • Accuracy: ± 1% ± 2dgt
    • Continuity: buzzer ≤ 25Ω

    Max Conductor

    • 25mm Ø

    General Specifications

    • Operating environment: 0°C to 40°C, <80% RH
    • Safety CAT III 600V
    • Power: 2 x 1.5V AAA
    • Weight: 260g approx.
    • Dimensions: 203 x 75 x 32mm
  • Supplied Accessories

    • Martindale CM55 AC Clamp Meter
    • Test leads (TL16)
    • Soft case
    • 2 x AAA batteries
    • Instruction manual for Martindale CM55
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  • Delivery Information

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    We use DPD/Interlink for all larger items and Royal Mail for smaller items and accessories. With DPD/Interlink you will receive a 1 hour delivery window on the day of delivery via e-mail/text and a notification 15 minutes before arrival so you will not have to wait around all day. You can even manage your booking online and re-arrange delivery for another date or arrange the goods to be left with a neighbour of your choice.

    We also offer delivery options for goods required urgently on certain products, all which are sent by DPD/Interlink.

    Our charges for UK deliveries:

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    • Pre-10.30am Next Working Day Delivery (on select products only) at £18.50*
    • Saturday Pre-Noon Delivery (on select products only) at £14.50*
    • Sunday Pre-Noon Delivery (on select products only) at £14.50*

    *UK mainland only

    NOTE! For next working day or Saturday/Sunday delivery options the order MUST be placed no later than 3pm on the working day before delivery is required. After 3pm, please arrange with our staff before selecting a priority delivery service. Priority services are available to UK mainland residents only (this might exclude certain areas in the north of Scotland).

    Customers outside the UK:

    Test-Meter.co.uk exports to many countries all over the world. Prices for shipping vary on location and weight/dimensions. Costs are calculated for certain countries at the checkout. If your country is not included in this list please e-mail admin@test-meter.co.uk with your name, address and the items you would like to order for an accurate shipping quote or go to http://www.test-meter.co.uk/test-equipment-export for more information.

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