Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 143)

Publication 900-UM007D-EN-E - January 2011
Parameter Adjustments & Application Considerations 4-7
EXAMPLE
In this example, we use the non-contact (infrared) sensor
type K thermocouple 0…260
°C specification to do a
2-point shift.
YL and YH in equations 1 and 2 are set temperature
Lower-Limit (YL = 0
°C) and set temperature Upper-Limit
(YH = 260
°C). Check the temperature of the control
target.
When the room temperature (X1) is 25
°C, the readout on
the controller (Y1) is 40
°C, and when the temperature near
the set point (X2) is 110
°C, the readout on the controller
(Y2) becomes 105
°C.
Lower-limit temperature input shift value:
Upper-limit temperature input shift value:
C insl
-27.3
Lower-limit
temperature
input shift
value
x {(110 – 105) – (25 – 40)} + (25 – 40) = –27.3
°
C
0 – 40
105 – 40
insl =
C insh
52.7
Upper-limit
temperature
input shift
value
insh =
x {(110 – 105) – (25 – 40)} + (25 – 40) = –52.7
°
C
60 – 40
105 – 40