Wika T53 User Manual download pdf (Page 22)

Parameter

Rel.

Index

Description Type Store

Size

byte

RO /

R/W

Min. Max. Default

TAB_X_Y_VALUE23

54 Linearisation x,y coordinate 23

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE24

55 Linearisation x,y coordinate 24

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE25

56 Linearisation x,y coordinate 25

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE26

57 Linearisation x,y coordinate 26

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE27

58 Linearisation x,y coordinate 27

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE28

59 Linearisation x,y coordinate 28

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE29

60 Linearisation x,y coordinate 29

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE30

61 Linearisation x,y coordinate 30

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE31

62 Linearisation x,y coordinate 31

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE32

63 Linearisation x,y coordinate 32

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE33

64 Linearisation x,y coordinate 33

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE34

65 Linearisation x,y coordinate 34

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE35

66 Linearisation x,y coordinate 35

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE36

67 Linearisation x,y coordinate 36

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE37

68 Linearisation x,y coordinate 37

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE38

69 Linearisation x,y coordinate 38

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE39

70 Linearisation x,y coordinate 39

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE40

71 Linearisation x,y coordinate 40

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE41

72 Linearisation x,y coordinate 41

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE42

73 Linearisation x,y coordinate 42

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE43

74 Linearisation x,y coordinate 43

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE44

75 Linearisation x,y coordinate 44

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE45

76 Linearisation x,y coordinate 45

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE46

77 Linearisation x,y coordinate 46

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE47

78 Linearisation x,y coordinate 47

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE48

79 Linearisation x,y coordinate 48

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE49

80 Linearisation x,y coordinate 49

Float

array

SRC 8 R/W 0, 0

TAB_X_Y_VALUE50

81 Linearisation x,y coordinate 50

Float

array

SRC 8 R/W 0, 0

2.9.3 Custom polynomial linearisation, Description

Polynomial linearisation can be used on mV and ohmic input signals. Polynomial linearisation is execut

ed according to the function f(x) = a

+ a

x + a

+ a

, in which a

...a

equal the coefficients

for a fourth order polynomial and x equals the input value. This function requires that the user can ob

tain or calculate the coefficients of up to 5 fourth order polynomials. Various computer programs such as

Math Cad can calculate these coefficients. If the preceding text is unfamiliar one should use the function

table linearisation in case of customer specific linearisation.

LIN_TYPE 240 = “Custom defined TC” generates a customer specific polynomial linearisation. The func

tion is primarily suitable for specific thermo elements but also for millivolt signals if the user can accept

to enter the input and the output values of the polynomial in µV and °C respectively.

LIN_TYPE 241 = “Custom defined RTD” generates a customer specific polynomial linearisation. The

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