Honeywell SMV 3000 User Manual page 199

C.3 Dynamic Compensation Flow Equation,
Table C-4
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Air Configuration Example, continued
Step
10
Enter the relevant process information from the Orifice Sizing Data
Sheet in each entry field of the Density Variables page.
Isentropic Exponent *
Design (flowing) Density
Standard (base) Density = 0.0764 lb/ft
Design Temperature
Design Pressure
Click Next to proceed to the Flowing Variables page.
11
Click on the following options for Failsafe Indication on the Flowing
Variables page (so that there is an " " in each check box). It has
been determined that the operator needs the flow output to go to
failsafe when there is either a pressure or temperature failure
(selecting Abs. Pressure and Process Temp. will assure this).
Set damping for the flow output at 1.0 seconds.
Since Flow Failsafe has been selected for a pressure or
temperature failure, the default values do not need to be set.
If failsafe for the flow output is not needed when a pressure or
temperature sensor fails, the default values for temperature and
pressure are used in the flow calculation and the flowrate
continues to be reported.
Click Next to proceed to the Solutions page.
12
The Solutions page presents itemized columns representing the data
entered and the corresponding Wizard values that were calculated
from the Wizard table data. Many of these values are used inside the
SMV 3000 Multivariable Transmitter to compensate and calculate the
flow for your application. Review the data to make sure the correct
choices have been made based on your flow application.
Click Finish to complete the Flow Compensation Wizard.
Connect SCT to SMV and establish communications. (See
13
subsection 5.2 for procedure, if necessary.)
14 Perform Download of the database configuration file to the SMV.
15
Use the procedure in subsection 7.5, Using Transmitter to Simulate
PV Input to verify the flow calculation for this application. You can
simulate inputs for PV1, PV2, and PV3 to verify PV4 output.
* Isentropic Exponent is also called the Ratio of Specific Heats.
SMV 3000 Transmitter User's Manual
Action
= 1.4044
= 0.2079 lb/ft
= 60°F
= 40 psia
Abs. Pressure
Process Temp
Continued
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