Yokogawa EJX930A - Manual (Page 17)

<2. About the EJX Multivariable Transmitter>
2-9
IM 01C25R01-01E
Example: Kfactor Calculation
Table 2.9 Flow Condition Example
Symbol Value Description
Qm 3011.76 (lb/h)
∆p 201.0935 inH2O@68degF Differential pressure
Tb 273.15 K Reference temperature unit: K
SPb 101.325 kPa abs Reference static pressure unit: kPa abs
T 293.15 K Temperature unit: K
SP 500 kPa abs Static pressure unit: kPa abs
Kfactor = Qm(lb/h) / ∆p × (Tb / T) × (SP / SPb)
= 3011.76 / 201.0935 Ч (273.15 / 293.15) Ч (500 / 101.325)
= 99.0464
Table 2.10 For HART Communicator (Function : Basic Flow Calc)
Symbol HART Parameter name Item
Kfactor Flow Calc Fixed Calcuration fixation value of flow
SPb Ref SP Reference static pressure
Tb Ref Temp Reference pressure
TempK1 Temp K1 The first in temperature correction coefficient for liquid
For volume flow: set 0.