wtw inoLab Multi 9620 IDS Operating Manual page 34

pH value
Continuing with two-
point calibration
34
9. Set the nominal buffer value for the measured temperature with
<><>.
10. Accept the calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
11. If necessary, finish the calibration procedure as a single-point calibration
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.
12. Thoroughly rinse the sensor with deionized water.
13. Immerse the pH sensor in buffer solution 2.
14. When measuring without temperature sensor:
Enter the temperature of the buffer with <><>.
15. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
The [AR] status indicator is displayed. The measured parameter
flashes.
16. Wait for the measurement with stability control to be completed or ter-
minate the stability control and take over the calibration value with
<ENTER>.
The pH value of the buffer solution is displayed.
ConCal
01.09.2017 08:00
17. Set the nominal buffer value for the measured temperature with
<><>.
18. Accept the calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
19. If necessary, finish the calibration procedure as a two-point calibration
with <M>.
The calibration record is displayed.
®
inoLab Multi 9620 IDS
ba77173e04 12/2017