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AC Clamp-on Meter Model CM 660 / CM 670 / CM 685
Resistance (Ω)
Range Resolution Accuracy
40Ω 0.1Ω
0.9% ± 2cts
400Ω 1Ω
40kΩ 0.01kΩ
400kΩ 0.1kΩ
4MΩ 0.001MΩ 2.0% ± 2cts
40MΩ 0.01MΩ 5.0% ± 2cts
Continuity ( )
Range Buzzer V Max
400Ω <50Ω ± 25Ω 3.4V
Frequency (Hz)
Range Resolution Accuracy
400Hz
0.1Hz 0.5% ± 5cts
4000Hz
Temperature (K type t/c)
Range Resolution Accuracy
-50 to 436°C 0.1°C
1.0% ± 5cts
-50 to 1100°C 1°C
-58 to 818°F 0.2°F
-58 to 2012°F 2°F
*Accuracy @ 23°C ±5°C, 80% RH Max, Conductor Centered in A, 40-400Hz in AC and Hz
Digital display: 4300-count 3 digit LCD
Polarity: When a negative signal is applied, the symbol appears.
Overload: If the range is exceeded, the symbol is displayed.
Low battery Indicator: is displayed when the voltage supplied by
the batteries is lower than the operating voltage.
Power Supply: 2 batteries - 1.5V type AA (LR6) Alkaline
Auto-off: Automatic shut down after approx 10 min of no use
Sampling: Approx 2 measurements/second for the digital display