Xylem HandyLab 600 - Manual (Page 25)

HandyLab 600 pH value
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Continuing with two-
point calibration
4. Thoroughly rinse the sensor with deionized water.
5. Immerse the sensor in the first buffer solution.
6. For measurements without temperature sensor :
Enter the temperature of the buffer with <><>.
7. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
The [AR] status indicator is displayed. The measured parameter
flashes.
8. Wait for the end of the measurement with stability control or accept the
calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
9. If necessary, finish the calibration procedure as a single-point calibra-
tion with <M>.
The calibration record is displayed.
For single-point calibration, the instrument uses the Nernst slope
(-59.2 mV/pH at 25 °C) and determines the zero point of the IDS
pH sensor.
pH 1
-180.0
24.8 °C
01.07.2011
08:00
Buffer
mV
pH
-180.0
24.8 °C
01.07.2011
08:00
AR
Buffer
mV
10. Thoroughly rinse the sensor with deionized water.
11. Immerse the pH sensor in buffer solution 2.