Honeywell user manual SMV 3000 Transmitter User’s Manual 187

C.3 Dynamic Compensation Flow Equation, Continued

Table C-4 Air Configuration Example, continued

Step

10

11

12

13

14

15

Action

Enter the relevant process information from the Orifice Sizing Data Sheet in each entry field of the Density Variables page.

Isentropic Exponent *	=	1.4044
Design (flowing) Density	=	0.2079 lb/ft3
Standard (base) Density	=	0.0764 lb/ft3
Design Temperature	= 60°F
Design Pressure	= 40 psia

Click Next to proceed to the Flowing Variables page.

Click on the following options for Failsafe Indication on the Flowing Variables page (so that there is an “a” 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).

aAbs. Pressure

aProcess Temp

•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.

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 subsection 5.2 for procedure, if necessary.)

Perform Download of the database configuration file to the SMV.

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.

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