Orp; Measuring; Measuring The Orp - Xylem SI Analytics Lab 855 Operating Manual

ORP

6 ORP
Stability control (AutoRead )
Stability criteria (AutoRead )
26
6.1

Measuring

6.1.1

Measuring the ORP

1. Connect the ORP electrode to the meter.
2. If necessary, call up the measured parameter U with <M>.
3. Immerse the ORP electrode in the test sample.
The measured value is checked for stability (stability control).
The [AR] status display flashes.
4. Wait for a stable measured value.
The [AR] display indicator no longer flashes.
During the measuring procedure, the stability control function is automatically
activated.
The stability control function (AutoRead) continually checks the stability of the
measured values in the monitored time interval. The stability has a consider-
able impact on the reproducibility of measured values. The [AR] display indi-
cator flashes until a stable value is measured.
Measured parameter
ORP
Temperature
U
4 8 6 3
2 3
1
Time interval Stability in the time interval
15 seconds ∆ : Better than 0.3 mV
15 seconds ∆ : Better than 0.5 °C
Lab 855
mV
TP
°C
AR
ba77143e02 12/2017