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Martindale CM87 True RMS AC/DC Clamp Meter

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MARCM87
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Martindale CM87 True RMS AC/DC Clamp Meter

Martindale's CM87 is a dual-current (AC/DC) clamp meter with large-size jaws.

The upgraded version of the Martindale CM82, the CM87 has wider measurement range, giving users the ability to test much more. The large-size, 57mm jaws are suitable for use on everything from smaller to larger conductors and once clamped on, both AC and DC current can be tested.

The CM87 can measure AC current to 1500A, DC current to 2000A and can also measure AC voltage to 750V, DC voltage to 1000V plus testing procedures for resistance, capacitance, frequency, duty cycle, type K thermocouple temperature, continuity and diode.

This clamp meter is perfect for any electrician, plus maintenance and service engineers.

Martindale CM87 True RMS AC/DC Clamp Meter Key Features

  • Large size clamp meter with 57mm jaws
  • True RMS technology ensures accuracy on irregular waveforms
  • Tests AC current to 1500A and DC current to 2000A
  • AC voltage measurements to 750V and DC current measurements to 1000V
  • Tests resistance levels to 66MΩ
  • Capacitance measurements to 6.6mF
  • Frequency testing to 1MHz
  • Duty cycle from 5 to 95%
  • Temperature measurement using type K thermocouple (included) up to 1000°C (1832°F)
  • 660Ω continuity test
  • Diode testing
  • 6600 count LCD display with bargraph
  • CAT IV 600V and CAT III 1000V rated (or CAT II 1000V rated with probe tip caps removed)

What's Included?

  • Martindale CM87 True RMS AC/DC Clamp Meter
  • Carrying Case
  • TL16 Test Leads
  • Type K Thermocouple
  • 9V PP3 Battery (Installed)
  • Instructions

Martindale CM87 Technical Specifications

All specified accuracies are at 23°C ± 5°C, <70% RH for 1 year
Temperature Coefficient: 0.1 x (specified accuracy) per °C (0°C to 18°C, 28°C to 50°C)
All accuracies below are expressed as ± (percentage of reading + digits)

DC Voltage   
Range Resolution Input Impedance Accuracy
6.6V 0.001V 10MΩ 0.5% + 2
66V
0.01V
9.1MΩ
660V
0.1V
1000V 1V
AC Voltage   
Range Resolution Input Impedance Accuracy (50Hz to 500Hz)
6.6V
0.001V 10MΩ
1.5% + 5
66V
0.01V
9.1MΩ
660V
0.1V
750V 1V
AC Current   
Range Resolution Accuracy
50Hz to 60Hz/60 to 400Hz
660A 0.1A 2.0% + 10
3.0% + 10
2.5% + 10
(≤1000A)
3.5% + 10
(≤1000A)
2000A 1A 5.0% + 10 (>1000A)  
DC Current   
Range Resolution Accuracy
660A 0.1A 2.0% + 5
2000A 1A 3.0% + 5 (≤1000A)
5.0% + 5 (>1000A)

(further tech specs in attached datasheet/manual)

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Additional Information
SKU MARCM87
Manufacturer Part Code MARCM87
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