Honeywell SMV 3000 user manual Example Air Through a Venturi, Step Action

C.2 Standard Flow Equation, Continued

Example: Air Through a Venturi

An engineer has specified a SMV 3000 Smart Multivariable Transmitter to compensate for air density changes and to calculate the standard volumetric flowrate of air through a Venturi meter. The engineer has sized the Venturi meter to produce a differential pressure of 49 inches H2O at 630 CFM at standard conditions. The flowing pressure is 129.7 psia, flowing temperature is 100 degrees F, and the standard (base) density is 0.0764 lbs/ft3.

The steps in Table C-1 show how to configure the SMV to calculate the PV4 flow variable for this application.

Table C-1 Air Through a Venturi Meter Configuration Example

Step

1

2

3

4

5

Action

Select a template for the SMV 3000 model you have for your flow application.

Select standard volume flow in the Algorithm field of the FlowAlg tab and then select the Engineering Units (CFM) on the FlowConf tab card.

Click the Wizard . . . on the SCT/SMV 3000 configuration window to

access the Flow Compensation Wizard Equation Model page.

Select Standard from the Equation Model list box on the Equation Model page of the Flow Compensation Wizard to launch the Kuser Model, then click Next to proceed to the Fluid Type page.

Select Gas as the fluid type from the list box on the Fluid Type page, then Next to proceed to the Gas Flow Type page.

Select Standard Volume as the gas flow type from the list box on the Gas Flow Type page, then click Next to proceed to the Process Data page.

Continued on next page

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