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Greenlee CM-660 AC True RMS Clamp Meter Greenlee CM-660 AC True RMS Clamp Meter
Greenlee CM-660 AC True RMS Clamp Meter Click to Zoom
Greenlee

Greenlee CM-660 AC True RMS Clamp Meter

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SKU
CM-660

The Greenlee CM-660 is an AC True-RMS clamp meter with 60 A and 600 A AC current ranges, 600 V AC/DC voltage measurement, and a 30 mm jaw opening. It also measures resistance and frequency, tests continuity and diodes, and provides AmpTip™ current measurement and non-contact EF detection, with CAT III 600 V and CAT IV 300 V ratings.

  • 60 A and 600 A AC Current Ranges
  • 600 V AC/DC Voltage Measurement
  • CAT III 600 V; CAT IV 300 V
  • 30 mm Maximum Jaw Opening
  • Resistance, Frequency, Continuity & Diode Testing
  • Non-contact AC Voltage Detection
Description Specifications Documents

Product Overview

The Greenlee CM-660 is an AC True-RMS clamp meter with 60 A and 600 A AC current ranges, 600 V AC/DC voltage measurement, and a 30 mm jaw opening. It also measures resistance and frequency, tests continuity and diodes, and provides AmpTip™ current measurement and non-contact EF detection, with CAT III 600 V and CAT IV 300 V ratings.

Technical Specifications

Product information and specifications for the selected item.

SKU: CM-660

Product Information

BrandGreenlee
MPNCM-660
SKUCM-660
UPC / GTIN0783310022114
CategoryTools

Key Specs

Bundle/SingleSingle Product
Height (in.)8.5
Width (in.)3

Package & Appearance

Bundle/SingleSingle Product
Power supply and typical current consumptionTwo 1.5 V AAA batteries (NEDA 24A or IEC LR03); CM-660 typical current consumption 4.3 mA.
Display and update rateLCD, 3-5/6 digits and 6000 counts; automatic polarity; nominal update rate 5 per second.

Dimensions & Weight

Height (in.)8.5
Width (in.)3
Length (in.)1.4
Weight (lb.)0.408
Maximum jaw opening / conductor diameterMaximum jaw opening/conductor diameter: 30 mm.
AC voltage range and accuracy600.0 V range; accuracy ±(1.0% + 0.5 V) at 50–60 Hz.
Frequency measurement range and sensitivityVoltage input: 5.00–999.9 Hz with 50 V sine-RMS sensitivity; current input: 50.00–400.0 Hz with 40 A sensitivity.
Safety design standardsDouble insulation per UL/IEC/EN 61010-1 Ed. 3, IEC/EN 61010-2-033 Ed. 1, CAN/CSA C22.2 No. 61010-1 Ed. 3, IEC/EN 61010-2-032 Ed. 2, and IEC/EN 61010-031 Ed. 1.1.
Non-contact EF detectionCM-660 has a dedicated switch position. At 50–60 Hz, listed non-contact EF detection bands span 10–600 V.
Voltage input impedanceVoltage input impedance: 10 MΩ, 100 pF nominal.
EMC complianceMeets EN61326-1:2006.
Diode test2.000 V measuring range; accuracy ±(1.5% + 0.005 V); typical test current 0.3 mA; typical open-circuit voltage <3.5 VDC.
Maximum clamped-conductor frequencyDo not clamp conductors carrying frequencies greater than 400 Hz.
Conductor-position accuracy allowanceAdd 2.0% to the accuracy when the conductor is not centered in the jaws.
AC clamp-current accuracy (60 A range)On the 60.00 A range: 0.00–0.19 A accuracy unspecified; 0.20–5.99 A ±(1.8% + 0.15 A) at 50–100 Hz and ±(2.0% + 0.15 A) at 100–400 Hz; 6.00–60.00 A ±(1.8% + 0.05 A) and ±(2.0% + 0.05 A), respectively.
AmpTip AC current range60.00 A range.
Continuity threshold and responseTone threshold between 10 Ω and 250 Ω; response time approximately 32 ms.
Transient protection6.0 kV (1.2/50 μs surge).
Storage conditions−20 to 60 °C; relative humidity <80%, with batteries removed.
AC clamp-current range and accuracy (600 A range)60.0–600.0 A; accuracy ±(1.8% + 0.5 A) at 50–100 Hz and ±(2.0% + 0.5 A) at 100–400 Hz. Accuracy is specified at 23 °C ± 5 °C.
DC voltage range and accuracy600.0 V range; accuracy ±(1.0% + 0.5 V).
Resistance ranges and accuracy600.0 Ω: ±(1.0% + 0.5 Ω); 6.000 kΩ: ±(1.0% + 0.005 kΩ); 60.00 kΩ: ±(1.0% + 0.05 kΩ). Open-circuit voltage: 1.0 VDC.
Automatic power-offAutomatic power-off after approximately 32 minutes of inactivity; typical APO consumption 5 μA.
Operating environment0–31 °C at 0–80% RH; 31–40 °C with RH decreasing linearly from 80% to 50%; pollution degree 2; indoor use only; operating altitude below 2000 m.
Measurement functions and sensingTrue-RMS; measures AC/DC voltage, AC current, AC AmpTip™, frequency, non-contact EF and resistance; tests diodes and continuity.
Measurement category ratingCAT III 600 V and CAT IV 300 V AC and DC.

Product Documents

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