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190 Micro Motion
®
Series 3000 MVD Transmitters and Controllers
Measurement Performance
21.3.4 Reading and interpreting meter verification test results
Pass/Fail/Abort
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. In other words, the stiffness
of the left and right pickoffs match the factory values plus or minus 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 repeat the meter verification test. If you were using Smart
Meter Verification, with outputs set to Continue Measurement, change the setting to Last
Measured Value or Fault.
- 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 your process
knowledge to determine the possibilities for damage and the appropriate actions for each.
These actions might include removing the meter from service and physically inspecting
the tubes. At minimum, you should perform a flow validation and a density calibration.
• Abort – A problem occurred with the meter verification test (e.g., process instability). Abort
codes are listed and defined in Table 21-3, and suggested actions are provided for each code.
Table 21-3 Meter verification abort codes
Abort code Description Suggested action
1 User-initiated abort None required. Wait for 15 seconds before
starting another test.
3 Frequency drift Ensure that temperature, flow, and density are
stable, and rerun the test.
5 High drive gain Ensure that flow is stable, minimize entrained
gas, and rerun the test.
8 Unstable flow Review the suggestions for stable flow in
Section 21.3.1 and rerun the test.
13 No factory reference data for meter verification
test performed on air
Contact Micro Motion customer service and
provide the abort code.
14 No factory reference data for meter verification
test performed on water
Contact Micro Motion customer service and
provide the abort code.
15 No configuration data for meter verification Contact Micro Motion customer service and
provide the abort code.
Other General abort. Repeat the test. If the test aborts again, contact
Micro Motion customer service and provide the
abort code.