Yokogawa digitalYEWFLO (DY-FF) - Manual (Page 46)

<9. GENERAL SPECIFICATIONS>
9-2
IM 01F06F00-01EN
Mass Flow or Volumetric Flow at Norminal/Standard condition Accuracy using Arithmetic (AR) function
block:
(when Multi-Variable Type (option code: /MV), High Process Temperature Version Multi-Variable Type
(combination of option code /HT and /MV) and outer pressure sensor are used)
Accuracy ± %: of Reading
Fluid
Mass Flow
Accuracy
(Note 1, Note 2)
Notes
Input for
Temperature,
Pressure
Reference condition for Mass Flow
Accuracy
Flow computing
Saturated
steam
(Temperature
base)
±2.0%
(Flow velocity
35m/s or less)
±2.5%
(Flow velocity
35m/s to 80m/s)
Temperature
Temperature range
+100 to +250°C (/MV)
+100 to +330°C (/HT/MV)
Density computing by temperature
using standard steam table (IAPWS-
IF97: International Associaton for the
Properties of Water and Steam)
Saturated
steam
(Pressure
base)
Pressure
Pressure range 0.1MPa to fl ange rating
Pressure accuracy ±0.2%
Density computing by pressure using
standard steam table (IAPWS-IF97:
International Associaton for the
Properties of Water and Steam)
Superheated
steam
Temperature
and Pressure
Pressure condition:
Pressure range 0.1MPa to fl ange rating
Pressure accuracy ±0.2%
Temperature condition:
Temperature range
+100 to +250°C (/MV)
+100 to +400°C (/HT/MV)
Density computing by temperature and
pressure using standard steam table
(IAPWS-IF97: International Associaton
for the Properties of Water and Steam)
General gas Not fi xed
Temperature
and Pressure
Accuracy is changed by fl uctuating
deviation factor K on temperature,
pressure condition Temperature, pressure compensation
computing using gas equation (Boyle-
Charles’s) at fi xed deviation factor K.
Liquid Not fi xed Temperature
Accuracy is changed by setting value for
temperature compensation factor Density computing by temperature
using equation API • JIS K 2249.
General gas
including
Natural gas
±2.0%
(Flow velocity
35m/s or less)
±2.5%
(Flow velocity
35m/s to 80m/s)
Temperature
and Pressure
For Natural gas accuracy condition is
Pressure condition:
Pressure range 0 to 12MPa
Pressure signal ±0.2%
Temperature condition:
Temperature range –10 to + 65°C
General gas is computed using physical
properties supported by DIPPR database
(AIChE: American Institute of Chemical
Engineers)
For natural gas, AGA No.8 is
applied for temperature, pressure
compensation computing
For general gas and liquid, DIPPR
database is applied (AIChE: American
Institute of Chemical Engineers) for
Mass fl ow computing.
Density calculation parameters are
downloaded by FSA120 • FieldMate
FlowNavigator (Note 3)
Liquid Not fi xed Temperature
Computed using physical properties
supported by DIPPR database
(AIChE: American Institute of Chemical
Engineers)
Note 1) Mass Flow Accuracy for Steam and Natural gas is computed adding by Temperature and Pressure compensation based on
Volumetric Flow Accuracy.
Note 2) Refer to GS 01F06A00-01EN about mass and volumetric fl ow accuracy of AI1 output and temperature accuracy of AI2 output.
Note 3) Refer to GS 01C25R51-01EN.
 Electrical Specifi cations
Power Supply Voltage:
9 to 32 V DC for general-purpose, fl ameproof types and Nonincendive type
9 to 24 V DC for intrinsically safe type (Entity model)
9 to 17.5 V DC for intrinsically safe type (FISCO model)
Output Signals:
Digital communication signal compliant with the F
OUNDATION
Fieldbus protocol
Condition of Communication Line:
Supply voltage: 9 to 32 V DC
Supply current: 15 mA maximum
24 mA maximum for the software download