03
04
1.3 Safety symbols on the meter
Important safety information; please refer to
user manual
High voltage
Compliance with requirements for double
insulation
Refers to the impulse withstand voltage
protection level in accordance with IEC-61010-1
standard overvoltage (installation) category III,
pollution degree 2.
Meter complies with European Community
(CE) standards
Earth ground
1.4.1 To avoid electric shock or personal injury, repairs
or servicing not covered in this manual should be
performed only by qualified personnel.
1.4.2 Remove test leads before opening battery cover
1.4.3 To avoid incorrect readings causing electric
shock or personal injury, when low battery
symbol “ ”appears replace batteries immediately.
1.4.4 The meter can be cleaned with a soft cloth to
remove any oil, grease or grime. Do not use
liquid solvent or detergent.
1.4.5 When the instrument is not in use, turn rotary
switch to “OFF”
1.4.6 If the instrument is not to be used for an extended
period of time, remove the batteries to prevent
damage to the instrument.
1.4 Maintenance
2. Features and Components
The CM660 is a portable, hand-held yet professional
meter that features an LCD with backlight, overload
protection and low battery indicator. These meters are
easy to use with one hand, suitable for professional
users or amateurs, and ideal for school or home use.
CAT III
1.2.13 Avoid direct sunlight, exposing batteries to
humidity, any strong magnetic field, or high
temperatures to ensure the extended life of
the meter.
-Auto and manual range
-Reading Hold function
-Max measurement
-Min measurement
-Frequency in clamp mode
-Auto power off
-Relative measurement
- Inrush measurement