Xylem WTW pH/ION 3310, Руководство по эксплуатации

Страница: 34 / 78

ORP voltage pH/ION 3310
34
ba77052d01 03/2014
6 ORP voltage
6.1 Measuring
6.1.1 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 8.2.1 S
YSTEM
, page 52).
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:
– Temper the test sample, or measure the current temperature.
– Enter the temperature value 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
Menu USB output
15.02.2014
14:15