Emerson Process Management 2400S manual Additional ProLink II tools for meter verification

Measurement Performance

10.3.2Additional ProLink II tools for meter verification

In addition to the Pass, Fail/Caution, and Abort result provided by the procedure, ProLink II provides the following additional meter verification tools:

•Test metadata – ProLink II allows you to enter a large amount of metadata about each test so that past tests can be audited easily. ProLink II will prompt you for this optional data during the test.

•Visibility of configuration and zero changes – ProLink II has a pair of indicators that show whether the transmitter’s configuration or zero has changed since the last meter verification test. The indicators will be green if configuration and zero are the same, and red otherwise. You can find out more information about changes to configuration and zero by clicking the button next to each indicator.

•Plotted data points – ProLink II shows the exact stiffness uncertainty on a graph. This allows you to see not only whether the meter is operating within specification, but also where the results fall within the specified limits. (The results are shown as two data points: Inlet and Outlet. The trending of these two points can help identify if local or uniform changes are occurring to the flow tubes.)

•Trending – ProLink II has the ability to store a history of meter verification data points. This history is displayed on the results graph. The rightmost data points are the most recent. This history lets you see how your meter is trending over time, which can be an important way of detecting meter problems before they become severe. You can view the graph of past results at either the beginning or the end of the meter verification procedure. The graph is shown automatically at the end. Click View Previous Test Data to view the graph at the beginning.

•Data manipulation – You can manipulate the graphed data in various ways by double-clicking the graph. When the graph configuration dialog is open, you can also export the graph in a number of formats (including “to printer”) by clicking Export.

•Detailed report form – At the end of a meter verification test, ProLink II displays a detailed report of the test, which includes the same recommendations for pass/caution/abort results that are found in Section 10.3.1. You have the options of printing the report or saving it to disk as an HTML file.

More information about using ProLink II to perform meter verification can be found in the ProLink II manual and in the on-line ProLink II help system.

Note: Historical data (e.g., previous test results or whether zero has changed) are stored on the computer on which ProLink II is installed. If you perform meter verification on the same transmitter from a different computer, from the display, or from a DeviceNet tool, the historical data will not be visible.

10.4Performing meter validation

To perform meter validation:

1.Determine the meter factor(s) to use. You may set any combination of the mass flow, volume flow, and density meter factors.

Note that all three meter factors are independent:

•The mass flow meter factor affects only the value reported for mass flow.

•The density meter factor affects only the value reported for density.

•The volume flow meter factor affects only the value reported for volume flow.

Compensation

Measurement Performance

Troubleshooting

Defaults

Configuration and Use Manual 97