KROHNE OPTISENS CL 1100 EN - Manual (Page 24)

5
OPERATION
24
OPTISENS CL 1100
www.krohne.com 01/2012 - 4001834501 - MA OPTISENS CL 1100 R01 en
5.3 Calibration
5.3.1 Calibration order
If you are also measuring the temperature and pH value of the measuring medium, it is essential
to calibrate in the following order, otherwise start with 3. calibrate the sensor:
1. Calibrate temperature measurement as described on the following pages.
2. Calibrate pH measurement (refer to the manual of the pH sensor).
3. Calibrate the sensor as described on the following pages.
5.3.2 Temperature compensation
2 option for temperature compensation during measurement:
• linear: linear: linear: linear: linear temperature compensation.
• off: off: off: off: temperature compensation is disabled.
3 option for temperature compensation during calibration:
• automatic automatic automatic automatic: the signal converter will automatically compensate temperature influence using
the information of a Pt100 or Pt1000 temperature sensor.
• manual: manual: manual: manual: the signal converter will compensate temperature influence using a manually
entered value; this option only makes sense if the temperature of the measured medium is
quite constant.
• off: off: off: off: temperature compensation is disabled.
The menu for the type of linear temperature probes offer the following options:
• Pt1000 Pt1000 Pt1000 Pt1000: choose this option if there is an external Pt1000 temperature sensor connected to the
signal converter.
• Pt100 Pt100 Pt100 Pt100: choose this option if the pH electrode has an integrated Pt100 temperature
measurement or if there is an external Pt100 temperature sensor connected to the signal
converter.
• manual manual manual manual: choose this option if there is no internal or external temperature sensor connected
to the signal converter.
INFORMATION!
•
The measurement is temperature dependent due to the linear temperature compensation.
The linear temperature compensation compensates the influence of the ion velocity.
• Please note that the temperature sensor should always record the temperature where the
measuring electrodes are exposed.
• If you activate the temperature c the temperature coefficient can be changed. The presetting
is based on drinking water: 3%/°K. You have to change the presetting if the medium is not
drinking water. The coefficient depends on the hardness and the ion velocity of the medium.
• If you choose no compensation, the measured Cl
2
, ClO
2
or O
3
concentration will most likely
deviate from the actual Cl
2
, ClO
2
or O
3
concentration. The reason is that the Cl
2
, ClO
2
or O
3
concentration of a specific medium varies depending on the temperature of the medium.
.book Page 24 Wednesday, February 1, 2012 11:58 AM