wtw inoLab Multi 9310 IDS, Operating Manual, Page: 34 / 114

pH value inoLab
®
Multi 9310 IDS
34
ba75937e10 08/2021
Continuing with two-
point calibration
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.
pH
7.000
24.8
°C
ConCal
1
01.07.2011
08:00
Buffer
V
W
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 end of the measurement with stability control (beep,
[HOLD][AR] status indicator), or take over the calibrated value with
<ENTER>
.
The pH value of the buffer solution is displayed.
pH
4.035
24.8
°C
ConCal
2
01.07.2011
08:00
Buffer
V
W