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AC Clamp-on Meter Model CM 660 / CM 670 / CM 685
1. Jaw assembly
Jaws open to 1.57" (40 mm)
2. Safety guard
Keep hands behind this protective guard
3. Lever / Trigger
Opens or closes jaws
4. Rotary selection switch
OFF Zero voltage
Hz Frequency and AC current (1000A)
Zero (CM 685) DC current (1000A); Reset 40A range
Hz Frequency and AC voltage (600V)
DC voltage (600V)
Resistance (40MΩ) and continuity
TEMP Temperature (CM 660 and CM 670)
°C °F Temperature (CM 685)
5. SELECT button
Selects or displays various ranges
6. RANGE button
Selects Auto Ranging or Manual Ranging measurement ranges
7. Display
Liquid crystal display
8. Positive and Negative terminals
“COM” : black
“+” : red
9. HOLD button
Freezes last measured value on display
10. PEAK button
Displays the peak value when measuring current
11. MIN/MAX button
Displays the minimum and maximum values of a measurement
NOTE: See §2.3 for button functions
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