• Product Description

    The CM57 is a new pocket sized high performance AC Clamp meter measuring AC current, AC/DC voltage, resistance with continuity test plus capacitance, frequency and diode test. The compact rugged design enables accurate and reliable current measurement down to 10mA resolution without the need to break into the circuit.

    True RMS measurement ensures reliable readings with distorted waveforms often caused by modern lighting and power supplies.

    Features include a thumbwheel for single handed operation, auto ranging for ease of use, auto power off and low battery indicator plus a high contrast backlit display with hold function useful for working in low light and hard to reach areas. The Smart function automatically detects and switches between resistance and capacitance measurements.

    The CM57 has a CATIII 600V safety rating and includes a non-contact voltage sensor built into the jaw for detecting the presence of AC voltages.

    The CM57 is supplied with Martindale TL16 test leads, soft carry case, alkaline batteries and manual. All Martindale clamp meters come with a 2 year warranty.


    True RMS measurement

    Autoranging 60.00A & 600.0A AC

    AC/DC voltage to 600V

    Resistance to 6MΩ

    Smart sense capacitance to 600µF

    Frequency measurement

    Continuity & diode test

    Non-contact voltage sensor

    Display backlight

    What Is Included:

    Leads (TL16)




    Item Specification

    AC Amps 60.00A / 600.0A
     Accuracy: ± 1.9% ± 5dgt
    AC Volts 6.000V / 60.00V / 600V
     Accuracy: ±1.2% ± 5dgt
    DC Volts 6.000V / 60.00V / 600V
     Accuracy: ±1% ± 3dgt
    Ohms 600.0.0Ω to 6.000MΩ
     Accuracy: ± 1.2% ± 3dgt
     Continuity: buzzer ≤ 30Ω
    Capacitance 6.000nF to 600.0µF
     Accuracy: ±3% ± 10dgt
    Frequency 6.000kHz / 10.00kHz (A), 6.000kHz to 100.0kHz (V)
     Accuracy: ±1.2% ± 3dgt
    Max Conductor  25mm Ø
    Operating environment 0°C to 40°C, <80% RH
    Safety CAT III 600V
    Power 2 x 1.5V AAA
    Weight 270g approx.
    Dimensions 203 x 75 x 32mm

    Additional Details

    Type Clamp Meter & Current Sensors