Emerson Process Management 1500 manual Configuration and Use Manual

Measurement Performance

10.3.1Specification uncertainty limit and test results

The result of the meter verification test will be a percent uncertainty of normalized tube stiffness. The default limit for this uncertainty is ±4.0%. This limit is stored in the transmitter, and can be changed with ProLink II when optional test parameters are entered. For most installations, it is advisable to leave the uncertainty limit at the default value.

When the test is completed, the result will be reported as Pass, Fail, or Abort:

•Pass – The test result is within the specification uncertainty limit. If transmitter zero and configuration match factory values, the sensor will meet factory specifications for flow and density measurement. It is expected that meters will pass meter verification every time the test is run.

•Fail/Caution – The test result is not within the specification uncertainty limit. Micro Motion recommends that you immediately re-run the meter verification test. If the meter passes the second test, the first Fail/Caution result can be ignored. If the meter fails the second test, the flow tubes may be damaged. Use the knowledge of your process to consider the type of damage and determine the appropriate action. These actions might include removing the meter from service and physically inspecting the tubes. At minimum, you should perform a flow validation (see Section 10.4) and a density calibration (see Section 10.5).

•Abort – A problem occurred with the meter verification test (e.g., process instability). Check your process and retry the test.

Compensation

Measurement Performance

Troubleshooting

Defaults

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