Thermo Fisher Scientific EcoScan pH/Ion 5 & 6 - Manual (Page 16)

Instruction Manual pH 5/6 & Ion 5/6
- 13
-
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 “PXX 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 “PXX” 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.