Yokogawa digitalYEWFLO (DY-FF) - Manual (Page 115)

<APPENDIX 6. Enhanced ARITHMETIC (AR) BLOCK>
A6-8
IM 01F06F00-01EN
Relative
Index
Parameter Write Mode
Initial
Value
Description / Remarks
29 ARITH_TYPE AUTO 0x01
Computation algorithm identifi cation no.
Value Selection Name Description
1 Flow compensation, linear Flow compensation (linear)
2 Flow compensation, square root Flow compensation (square root)
3 Flow compensation, approximate Flow compensation (approximate expression)
4 BTU fl ow (*) Quantity of heat calculation
5 Traditional Multiply Divide Multiplication and division
6 Average Average calculation
7 Traditional summer Summation
8 Fourth order Polynomial, (Type 1) 4th-order (auxiliary input) polynomial computation
9 HTG level compensation (*) HTG-level compensation
10 Fourth order Polynomial, (Type 2) 4th-order (main input) polynomial computation
11 to 31 Reserve For reserve of FF Std calculation.
32 Saturated steam (Temperature) Density calculation of Sat.Steam (Temp.)
33 Saturated steam (Pressure) Density calculation of Sat.Steam (Press.)
34 Superheat steam Gas Temp./Press. compensation calculation
(Deviation factor: Fixed).
35 Gas temperature pressure
compensation Density calculation of S.H.Steam
36 Liquid temperature compensation Liquid Temp. compensation Calculation
37 Gas temperature pressure
compensation (Detail) Gas Temp./Press. compensation calculation
(approximating polynomial calculation: 0 to 11).
38 Liquid temperature compensation
(Detail) Liquid Temp./Press. compensation calculation
(approximating polynomial calculation: 0 to 3).
* BTU stands for British thermal unit.
HTG stands for hydrostatic tank gauging.
30 BAL_TIME AUTO 0 Time taken to return to the set value
31 BIAS AUTO 0 Bias value used to calculate the output
32 GAIN AUTO 1 Gain value used to calculate the output
33 OUT_HI_LIM AUTO +INF Maximum output value
34 OUT_LO_LIM AUTO -INF Minimum output value
35 UPDATE_EVT — Indicates event information if an update event (setting change) occurs.
36 BLOCK_ALM — Indicates alarm information if a block alarm occurs.
37
AR_
VOLUMETRIC_
FLOW_UNIT
O/S
m 3 /h
(1349)
Volumetric fl ow unit
38
AR_
TEMPERATURE_
UNIT
O/S
°C
(1001)
Temperature unit
39
AR_BASE_
TEMPERATURE
MAN 0.0 Temperature unit at normal condition
40
AR_
PRESSURE_
UNIT
O/S
MPa
(1132)
Pressure unit
41
AR_BASE_
PRESSURE_ABS
MAN 0.1013 Pressure unit at normal condition (abs)
42 AR_DEVIATION MAN 1.0 Deviation factor
43
AR_DENSITY_
UNIT
O/S
kg/m 3
(1097)
Density unit
44
AR_BASE_
DENSITY
MAN 1.0 Density unit at normal condition
45
AR_FIRST_
TEMP_COEF
MAN 0.0 1 st temperature coeffi cient for liquid
46
AR_SECOND_
TEMP_COEF
MAN 0.0 2 nd temperature coeffi cient for liquid
47
AR_FLOW_
CONFIG
MAN
all
0.0
A polynomial coeffi cient for density calculation (16)
Gas Temp./Press. Calculation (Detail): use FLOW_CONFIG[0] to [11]
Liquid calculation (Detail): use FLOW_CONFIG [0] to [3]
48
AR_DENSITY_
FACTOR
— —
Correction value:
Mass fl ow output: density at operating condition
Volumetric fl ow output: ratio of density at operation condition to density at normal
condition.)
49
AR_DENSITY_
FACTOR_UNIT
— Correction value unit. (The unit is indicated only for density at operation condition.)