Instruction Manual
pH 5/6 & Ion 6
14
9. Press
ENTER
key to confirm 2
nd
point calibration (e.g. 10.0 ppm) and the display
will show the next calibration option, 100.0 ppm.
To exit from 2-point calibration, press
CAL
key and the LCD shows “
P
XX mV”
momentarily which is the ISE slope in mV value.
The meter then reverts to ion measurement mode. The calibration values are
successfully stored into its memory. Otherwise an error message “
Er3
” will be displayed
if the slope of ISE is lower than 15mV/decade or higher than 90mV/decade.
10. For 3-point calibration where the LCD last shows “100.0”, press
ENTER
key to
proceed to last calibration point. Repeat the above procedure.
Likewise, at the end of 3
rd
point calibration the meter will display the mV slope of
electrode “P
XX
” and the calibration values are successfully stored. Otherwise error
message will appear in the LCD if the calibration was unsuccessful with no values
stored into memory.
