Multi 9420
ORP voltage
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04/2015
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ORP voltage
5.1
Measuring
5.1.1 Measuring the ORP
Stability control
(AutoRead)
& HOLD function
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.
The measured parameter flashes on the display
as soon as the measured value is outside the stability range
when the automatic
Stability control
is switched off.
You can start the
Stability control
manually at any time, irrespective of the
setting for automatic
Stability control
System
menu.
The sensor connection and the USB-B (device) interface are gal-
vanically isolated. This facilitates interference-free measurements
also in the following cases:
Measurement in grounded test samples
Measurement with several sensors connected to one Multi 9420
in one test sample
IDS ORP sensors are not calibrated. However, you can check IDS
ORP sensors using a test solution.
1.
Connect the ORP sensor to the meter.
The ORP measuring window is displayed.
2.
Adjust the temperature of the solutions and measure the current tem-
perature if the measurement is made without a temperature sensor.
3.
Check the meter with the ORP sensor.
4.
Immerse the ORP sensor in the test sample.
03.04.2013 08:00
Info
