Thermo Fisher Scientific EcoScan pH/Ion 5 & 6 - Manual (Page 15)

Instruction Manual pH 5/6 & Ion 5/6
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3.3.1 Multi-point Ion Calibration
1. In case if you need to start calibration using 1.0 ppm standard solution, you can skip
the 0.1 ppm calibration option (as mentioned * below).
2. For this instance let’s take 1.0 ppm calibration. To begin, pour a known 1.0 ppm
standard solution into a clean container. Power on the meter, and set the meter to
Ion measurement mode.
3. Dip the ISE into 1.0 ppm standard solution. Swirl it gently. Press CAL key to enter
into calibration mode.
4. The display shows “CA” momentarily followed by “0.1” flashing.
* At this moment, if you wish to calibrate 1 st ion calibration option other than 0.1 ppm,
use key once to select 1.0 ppm. Using or key you may select other options
like 0.1, 10.0 or 100.0 ppm.
5. Press ENTER key and the displayed value shows corresponding measured mV
reading that is equivalent to 1.0 ppm. Allow the reading to stabilise.
6. Press ENTER key to confirm 1 st point calibration (e.g. 1.0 ppm) and the display will
show the next calibration option, 10.0 ppm. Rinse the electrode with distilled water
and blot it dry if necessary.
7. Pour a known 10.0 ppm standard solution into another clean container. Dip the
electrode into the standard solution. Swirl it gently.
8. Press ENTER key and the displayed value shows measured mV reading that is
equivalent to 10.0 ppm. Allow the reading to stabilise.