Siemens 6ES7134-4JB00-0AB0 Manual page 11

Compensation of thermocouples with a compensating box
As well as the error limits of the 2AI TC ST electronic module (see Table "Technical data
2AI TC ST (6ES7134-4JB00-0AB0)" in this chapter) you must also take the accuracy of the
compensating box into account.
Compensation of thermocouples with a Pt100 on the 2AI RTD ST
Wiring rules
Additional technical data on the
error limits of the 2AI TC
In the case of thermocouples with a characteristic curve with a very shallow gradient, these errors
1
can lead to a major measurement discrepancy.
For the following thermocouples, this causes a limitation of the input range of the thermocouples in
which the accuracy information in the manual applies:
•
•
•
2AI TC ST analog electronic module (6ES7134-4JB00-0AB0)
Manual, 04/2007, A5E01076883-01
Factors affecting the accuracy of the temperature measurement
Type N: -100 °C
Type K: -230 C
Type E: -230 C
1.1 2AI TC ST analog electronic module (6ES7134-4JB00-0AB0)
Ensure there is good thermal contact between the reference
junction and the Pt100 used for compensation.
We recommend that you wire the Pt100 with a four-wire
connection.
The accuracy of the thermal resistor (Pt100) used for
compensation must be taken into account.
The error of the measurement input (2AI RTD ST) used for
compensation must be taken into account.
Properties
1
1
11