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AC Clamp-on Meter Model CM 660 / CM 670 / CM 685
2.3 Button Functions
2.3.1 Auto-off Function
Except in the HOLD, MIN/MAX or PEAK function, the clamp-on meter
shuts down automatically approximately 10 minutes after the last mea-
surement. The buzzer sounds (7 beeps) one minute before shutdown.
Pressing any button except SELECT starts a new 10-minute period.
To disable the Auto-off function:
• Turn the rotary switch to OFF
• Press and hold down the HOLD button and set the rotary switch
to any position other than OFF
• The icon disappears and the automatic shutdown
is deactivated
To enable the Auto-off function:
• Turn the rotary switch to OFF
• Set the rotary switch to any position other than OFF
• The icon is displayed and the automatic shutdown
is activated
2.3.2 HOLD Button
This function locks the present displayed value.
When in this mode, the Auto-off function is automatically deactivated.
• Press the HOLD button during the measurement
• The
icon appears and the measurement is locked
• To deactivate, press the HOLD button again
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