Yokogawa EJX930A - Manual (Page 68)

<10. General Specifications>
10-4
IM 01C25R01-01E
 Mass Flow Calculation
(For Measurement function code B of HART and
F OUNDATION Fieldbus protocol types)
 Auto Compensation Mode (FlowNavigator
is required for configuration)
Configuration of the fluid physical properties and
primary device for the EJX910A/EJX930A can be
performed using a dialog window of FlowNavigator.
All flow factors for mass flow calculation are
dynamically compensated to an optimum value.
In Auto mode, mass flow can be measured with
high accuracy.
The flow factors automatically compensated are
discharge coefficient, diameter of primary device,
upstream internal pipe diameter, gas expansion
factor, density, and viscosity.
FlowNavigator: (Refer to GS 01C25R51-01E)
FSA120 software package is used to perform mass
flow configuration for the EJX910A/EJX930A.
This software can also read and write the general
transmitter parameters. Configuration of the fluid
physical properties and the primary device of the
EJX910A/EJX930A can be done by means of a
dialog menu.
FlowNavigator runs on a notebook PC equipped
with a communication interface for HART/
F OUNDATION Fieldbus.
 Basic Flow Calculation Mode
Flow operation and density compensation are
performed conventionally, with the flow factors
manually input.
The operational expression is switched by the fluid
type and the unit setting.
Density is compensated as follows according to the
selection of gas or liquid
Gas: Compensation as ideal gas by
temperature and pressure.
Liquid: Compensation by temperature.
Flow operational expression: refer to Table 2.1
Symbol: refer to Table 2.2
Flow unit categories: refer to Table 2.3, 2.4, 2.5
 Normal Operating Condition:
(Selected features may affect limits.)
Ambient Temperature Limits
–40 to 85°C (–40 to 185°F)
–30 to 80°C (–22 to 176°F) with LCD display
Process Temperature Limits
–40 to 120°C (–40 to 248°F)
Ambient Humidity Limits
0 to 100% RH
Working Pressure Limits (Silicone oil)
Maximum Pressure Limits
EJX910A
L Capsule 16 MPa (2300 psi)
M and H Capsule 25 MPa (3600 psi)
EJX930A
M and H Capsule 32 MPa (4500 psi)
Minimum Pressure Limit
See graph below
Atmospheric
pressure
-40
(-40)
0
(32)
40
(104)
80
(176)
120
(248)
1(0.14)
2.7(0.38)
10(1.4)
(psi abs)
100(14.5)
Process temperature °C (°F)
Working
pressure
kPa abs
Applicable range
F1002.ai
Figure 10.1 Working Pressure and Process Temperature