wtw inoLab Multi 9620 IDS Operating Manual page 45

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inoLab Multi 9620 IDS
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ba77173e04 12/2017
ORP electrodes can be used to determine the relative ORP.
1. Connect the ORP electrode to the meter.
2. Prepare the reference solution for the determination of the reference
point.
3. Select the ΔU (mV display with <M>.
4. Immerse the ORP electrode in the reference solution.
5. Display the potential of the current zero point with <CAL>.
6. Press <ENTER> to measure the reference solution.
The measured value is checked for stability (automatic stability con-
trol). The display of the measured parameter flashes.
The measured potential is defined as the zero point.
or
Press <M> to terminate the display of the zero point.
7. Rinse the ORP electrode and immerse it in the test sample.
The measured value is checked for stability (automatic stability con-
trol). The display of the measured parameter flashes.
8. Wait for a stable measured value.
The display of the measured parameter no longer flashes.
01.09.2017 08:00
Info
The Stability control function checks whether the measured values are stable
within the monitored time interval.
Measured parame-
ter
ORP
Temperature
The minimum duration until a measured value is assessed as stable is the
monitored time interval. The actual duration is mostly longer.
Time interval
15 seconds
15 seconds
Stability in the time interval
∆ : better than 0.3 mV
∆ : better than 0.5 °C
ORP
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