General Tools and Instruments CMM880 - Manual (Page 8)

If you want to calibration 75% , please
remove the meter probe from the 33%
salt bottle and plug it into the 75% salt
bottle. Then press the "MN/MX" button,
you will see a % MAX display on the
LCD.(See Fig.I)Then leave the meter in
the 75% bottle for another 40 minutes.
When the 75% calibration is completed,
the screen shows MIN and MAX ,(See
Fig.J) press C/F button to save the
calibration value of 75%. The LCD will
show "s" (See Fig.K) for 2 seconds and
then resume to the normal measuring
mode. You can remove the meter from
the 75% bottle now .
% MIN
C
Fig. H
% MIN
MAX
C
Fig. I
%
MAX
C
Fig. J
See Fig.H ,please leave the meter in
the bottle for at least 40 minutes and
the meter will start the calibration
process. When the calibration for 33%
is done ,you will see a MIN and MAX
display on the LCD screen.
Press C/F button to save the calibration
of 33% . The LCD shows "s" in 2
seconds (See Fig.K) and then resume
normal measurement. Turn off the
meter, the calibration of 33% is
completed .
7
Fig. K