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7.3.2 Temperature Measurement
Temperature measurement requires either manual or automatic temperature
compensation.
Manual Temperature Compensation (MTC):
Without temperature sensor.
The process temperature in the range of 31 to +482°F (35 to +250°C) is entered
directly.
Procedure:
Select MTC in the temperature measurement menu.
Enter the known value of the process temperature in the MTC temp field.
Two-circuit measurement: Repeat procedure for second measuring point.
Automatic Temperature Compensation (ATC):
In order to measure the temperature precisely, the temperature sensor of the measuring
cell must be calibrated independent of the conductivity measurement. Calibration
requires a precision temperature sensor for comparison measurement. The temperature
of the measuring solution must be within the specified temperature measuring range from
31 to +482°F (35 to +250°C). This calibration consists of a shift of the Pt 100
characteristic to the temperature value measured.
Procedure:
Immerse the measuring cell and the precision temperature sensor (comparison
measurement) in the measuring solution.
Select ATC in the temperature measurement menu.
Enter the temperature value of the comparison measurement in the Offset temp. field.
Two-circuit measurement: Repeat procedure for second measuring point.
Function Selection Factory setting
Type of temperature compensation Manual (MTC) Automatic (ATC)
Automatic (ATC)
For Automatic (ATC) selection
Enter actual temperature value for 31 to +482°F (35 to +250°C)
channel 1
Display of temperature 1, offset 1 No selection
Enter actual temperature value for 31 to +482°F (35 to +250°C)
channel 2 (difference only)
Display of temperature 2, offset 2 No selection
(difference only)
For Manual (MTC) selection
Enter MTC temperature 31 to +482°F (35 to +250°C) 77°F (25°C)
Enter MTC temp. channel 2 31 to +482°F (35 to +250°C) 77°F (25°C)
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