General Tools and Instruments CMM880 - Manual (Page 7)

6
The meter is calibrated in house
before shipping.
To maintain the meter in the good
condition for use , recommend to
calibrate the meter after long time
using.
Cleaning:
Use a damp cloth and mild soap to
clean the case of the meter, do not
use harsh detergents or abrasives
as these may mar the finish or
damage the unit's case with an
adverse chemical reaction.
Caution: Please do not immerse probe
into liquids as this will cause permanent
damage to the sensor.
The calibration performace is only
available for the calibration code was
not delected before shipment.
And there are 2 calibration method :
one is Manual calibration , another one
is Automatic calibration.
Manual Calibration :
Turn off the meter , then plug the meter
probe into the 33% salt bottle and then
power on the meter by pressing " ON
/OFF button and the C/F button at the
same time. When LCD screen shows
a full display, release the ON/OFF key.
You will see the display of C and F
at the lower right corner of LCD screen
, then release the C/F button. The LCD
will display only the default setting of
temperature unit C or F. Press "RST"
key and you will see a "% MIN" display
on the right upper corner.
MAINTENANCE
CALIBRATION MODE