Sensor type:
First select the sensor type. The sensor
type is given on the sensor nameplate.
This sensor selection is necessary and
activates the sensor-specific data in the
controller.
Temperature compensation
This function is used to compensate for
the temperature influence on the meas‐
urement. The process temperature is set
in the DMTa measuring transducer when
using a DMTa measuring transducer
Temperature: [Off] / [Manual] / [Automatic]
n
[Off]
switches the process tempera‐
ture setting off
n
[Manual]
permits manual process
temperature setting
n
[Automatic]
uses a measured process
temperature
Temperature compensation
This function is used for compensation of
the temperature influence of the process
on measurement.
Temperature: [Off] / [Manual] / [Automatic]
n
[Off]
switches the process tempera‐
ture setting off
n
[Manual]
makes possible a manual
specification of the process tempera‐
ture
n
[Automatic]
uses a measured process
temperature. Automatic measurement
of the temperature using the tempera‐
ture sensor, e.g. Pt1000. For pH,
CDP and fluoride, temperature com‐
pensation can be switched
[ON]
or
[OFF]
in the menu.
Temperature: Off / Manual / Automatic
For the
‘Off’
setting, the temperature
influence of the process water on the pH
measurement is calculated at the fixed
temperature value of 25 °C. A tempera‐
ture measurement does not take place.
For the
‘Manual’
setting, the previously
determined process temperature must be
manually entered in the controller. The
‘Manual’
function only makes sense if the
process temperature is stable (± 2 °C). If
the process temperature changes quickly
> ± 5 °C, then the
‘Automatic’
setting is
required.
For the
‘automatic’
setting, a type
[Pt100]
or
[Pt1000]
temperature sensor must be
connected. The controller automatically
detects which type of temperature sensor
is connected. To achieve accurate tem‐
perature compensation, the temperature
sensor must be in the same process water
as the sensor used for the measured vari‐
able.
Further input options are shown under the
‘Automatic’
setting:
Temperature
The temperature measurement is used
only for information and recording pur‐
poses, but not for temperature compensa‐
tion. Temperature compensation is per‐
formed in the sensor. If the measured
variable
[Chlorine dioxide]
and the
[CDP]
type of sensor have been selected, then a
separate temperature measurement is
needed for temperature compensation.
Glossary
172
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