Martindale CM79 AC/DC TRMS Clamp Meter

Product no.: CM79
Old price £139.00
from £81.32
Price plus VAT, plus delivery

Martindale CM79 AC/DC TRMS Clamp Meter

  • TRUE RMS measurement
  • AC & DC current
  • Autoranging 60.00A & 600.0A
  • AC/DC voltage to 600V
  • Resistance to 1000Ω
  • Continuity test <40Ω
  • Min / Max readings
  • Auto power off & low battery indicator
  • Display backlight


The CM79 is a new pocket sized high performance TRMS AC/DC Clamp meter measuring AC and DC current up to 600A, AC/DC voltage and resistance with continuity test. The compact rugged design enables accurate and reliable DC current measurements down to 10mA resolution in applications including PV installations, battery monitoring and electric vehicles.

The TRMS capability ensures accurate and reliable AC current and voltage measurement for distorted waveforms caused by today’s power electronics and non-linear loads found in modern lighting and power supplies.

Features include an elliptical jaw to accommodate bus bars up to 35x15mm, thumbwheel for single handed operation, auto ranging for ease of use, auto power off and low battery indicator plus a high contrast backlit display. Useful functions include hold and min/max hold for monitoring maximum loads, start up and charging currents.

The CM79 is supplied with Martindale TL16 test leads, soft carry case, alkaline batteries and manual. All Martindale clamp meters come with a 2 year warranty.



Current AC 60.00A/600.0A
Accuracy ± 2% ± 5 dgt
Current DC 60.00A/600.0A
Accuracy ± 2% ± 5 dgt
Voltage AC 600.0V
Accuracy ± 1.2% ± 5 dgt
Voltage DC 600.0V
Accuracy ± 1% ± 2 dgt
Ohms 999.0Ω
Accuracy ± 1% ± 2 dgt
Continuity buzzer ≤ 30Ω
Max conductor 25mm diameter, 45mmx15mm bus bar
Operating environment 0°C to 40°C, 80% RH
Supply 2 x 1.5V AAA
Weight 255g approx.
Dimensions 209 x 74 x 36mm
Includes TL16 leads, case, alkaline batteries and manual



  CM57 CM69 CM79
AC Current ✔ ✔ ✔
DC Current     ✔
AC/DC Volts ✔ ✔ ✔
Ohms ✔ ✔ ✔
Frequency ✔    
Capacitance ✔    
Non-contact Voltage Detector ✔    
Auto ranging ✔ ✔ ✔
Max Conductor Size 25mm Ø
20mm Ø 25mm Ø
True RMS ✔ ✔ ✔
Min Max   Peak ✔
Backlight ✔ ✔ ✔
Auto Power Off ✔ ✔ ✔
Other   Low pass filter
0.001mA resolution
Safety CAT III 600V CAT III 600V


Product Note Price
Multimeter Test Leads Multimeter Test Leads
£8.45 *
Soft Carry Case Soft Carry Case
£16.48 *
* Prices plus VAT, plus delivery
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