7.3.2 Temperature measurement
For the temperature measurement, a
temperature compensation must be carried
out either manually or automatically.
Manual temperature compensation (MTC):
Without temperature sensor.
Enter the process temperature directly within
the range from –35 °Cto250°C.
Proceed as follows:
• Select »MTC«
from the Temperature measurement menu
• Enter the known process temperature
in the »MTC temp.« field
• For differential measurements: repeat the
procedure for the second measuring point
Note:
At »MTC« no current output is
available for temperature. This
applies as well, if a completely
installed measuring device is
switched from »ATC« to »MTC«.
Automatic temperature comp. (ATC):
To obtain a precise temperature
measurement, you can calibrate the
temperature sensor of the sensor
independently of the conductivity
measurement.
A precision temperature sensor is required to
carry out the comparative measurement.
The temperature of the measurement solution
must be within the temperature measuring
range of –35 °Cto250°C.
The calibration involves shifting the Pt 100
characteristic to the temperature level
measured.
Proceed as follows:
• Immerse the sensor in the measuring
solution together with the precision
temperature sensor
(comparative measurement)
• Select »ATC« from the temperature
measurement menu
• Enter the temperature value of the
comparative measurement in the
»Offset temp.« field
• For differential measurements: repeat the
procedure for the second measuring point
Function Selection Factory setting
Type of temperature compensation
manual (MTC)
automatic (ATC)
automatic (ATC)
If »automatic (ATC)« selected
Enter actual temperature value for
channel 1
–35.0 ... +250.0 °C
Display temperature 1, offset 1 no selection
Enter actual temperature value for
channel 2 (only for difference)
–35.0 ... +250.0 °C
Display temperature 2, offset 2
(only for difference)
no selection
If »manual (MTC)« selected
Enter MTC temperature –35.0 ... +250.0 °C25.0°C
Enter MTC temperature
Channel 2 (only difference)
–35.0 ... +250.0 °C25.0°C
lm152e07.chp
Mycom CLM 152 Instrument configuration
Endress+Hauser 49