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7. TEMPERATURE COMPENSATION
Temperature compensation data (TC1, TC2) and reference temperature have to be en-
tered before starting calibration.
Temperature fluctuations in the product to be measured are usually associated with den-
sity fluctuations. This means that a changed density is indicated, although the concentra-
tion of the product did not change. Temperature compensation helps to avoid this prob-
lem.
7.1 Temperature Measurement
The product temperature can be measured either
• via resistance thermometer Pt 100
or
• by entering the product temperature as current signal 0 - 20 mA.
The respective operating mode is selected in the Config Instrument / Operating Mode
menu.
If the temperature is measured using the resistance thermometer Pt 100, a linearization
of the Pt 100 curve is carried out. The range of the current signals is entered in the Pa-
rameter menu (parameters Current input range and Temp. limit values).
7.2 Monitoring the Temperature Signal
Temperature compensation is activated when selecting the respective instrument con-
figuration and the temperature signal is monitored. The error message “Error Temp.
measurement” is displayed:
PT 100 connection: when measured temperature < -200 °C.
Current signal 4 - 20 mA: when input signal < 4 mA.
Current input signal 0 - 20 mA is not monitored.
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