YSI TruLab 1320P - Manual (Page 43)

TruLab pH/ISE 1320 ORP voltage
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7.1.2 Measuring the relative ORP
To measure the difference of the ORPs of two solutions, you have to define the
ORP of one solution as the zero point first.
AutoRead The Stability control function checks whether the measured values are stable
within the monitored time interval.
2. Release the frozen measured value again with <AR>.
The HOLD function is switched off.
The [HOLD] status display disappears.
pH and 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.
Δ
U
13.5
mV
24.8 °C
12.12.2012
12:12
USB output