YSI TruLab 1320P - Manual (Page 41)

TruLab pH/ISE 1320 ORP voltage
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7 ORP voltage
7.1 Measuring
7.1.1 Measuring the ORP
NOTE
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as the values would be incorrect.
The USB interface is not galvanically isolated.
Stability control
(AutoRead )
The stability control function (AutoRead) continually checks the stability of the
measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values.
You can activate or switch off the automatic Stability control function (see
section 9.3.1 S
YSTEM , page 75).
The measured parameter flashes on the display

as soon as the measured value is outside the stability range
 when you switch over between the measured parameters with <M>.
 when the automatic Stability control is switched off.
Criteria for a stable
measured value
The Stability control function checks whether the measured values are stable
within the monitored time interval.
1. Connect the ORP electrode to the meter.
2. If necessary, select the U (mV) display with <M>.
3. When measuring without temperature sensor:
Measure the temperature of the test sample and enter it with <> <>.
4. Rinse the ORP electrode and immerse it in the test sample.
The measured value is checked for stability (automatic stability control).
The display of the measured parameter flashes.
5. Wait for a stable measured value.
The display of the measured parameter no longer flashes.
U
157.0
mV
24.8 °C
12.12.2012
12:12
USB output