Analog Electronic Modules
12-94
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Compensation of thermocouples with a compensation unit
In addition to the error limits of the 2AI TC Standard electronic module (see
”Technical Specifications” table in this chapter), you must also consider the
precision of the compensation unit.
Compensation of thermocouples with a Pt100 on the 2AI RTD Standard
Factors that influence the precision of the temperature measurement
Rules for wiring
Make sure that there is a good thermal contact between
the reference junction and the Pt100 used for
compensation.
We recommend wiring the Pt100 with a 4-wire connection.
Supplementary technical
specifications for the error
li it
f th 2A TC
The precision of the thermal resistor (Pt100) used for
compensation must be considered.*
limits of the 2A TC
The errors of the measuring input (2AI RTD Standard)
used for compensation must be considered*
* This error can result in a greater measurement deviation when using thermocouples with
a very low rise of the thermocouple characteristic.
With the following thermocouples this results in a restriction of the input range of the
thermocouple for which the precision specifications of the manual apply:
Type N: --100
°
C
Type K: --230
°
C
Type E: --230
°
C
Содержание SIMATIC ET 200S
Страница 42: ...Product Overview 1 16 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 64: ...Brief Instructions on Commissioning ET 200S 2 22 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 112: ...Configuration Options 3 48 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 232: ...Commissioning and Diagnostics 6 72 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 244: ...General Technical Specifications 7 12 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 274: ...Interface Modules 8 30 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 538: ...4 IQ SENSE 13 18 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 564: ...Address Space of the Input and Outputs of the ET 200S C 4 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 574: ...Response Times D 10 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 580: ...Special Measures for Interference Free Operation F 4 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 600: ...Product Information on the Use of subassemblies modules in a Zone 2 Hazardous Area 2 A5E00352937 02 ...