ABB SensyMaster FMT430 - Sensorcheck Diagnosis Function; Assessment of the Result

134 SensyMaster FMT430, FMT450 THERMAL MASS FLOWMETER | OI/FMT430/450-EN REV. B
… 10 Diagnosis / error messages
‘SensorCheck’ diagnosis function
SensorCheck compares the characteristic values of the installation fingerprint with those of the current device fingerprint. As a
result, changes to the sensor element such as contamination or damage, for example, can be detected early on and the integrity of
the measurement can be guaranteed.
Note
The SensorCheck lasts approx. 12 min. Make sure that during the test there is no flow through the sensor (e.g. by shutting or sealing
it off).
Menu / parameter
Description
Diagnostics / ...SensorCheck /
...Verify Fingerprint
Verify
Fingerprint testing manual start using .
Result
Read fingerprint status
• in progress: SensorCheck is running.
• incomplete: SensorCheck has been aborted.
• done: SensorCheck has successfully completed.
If an error of the SensorCheck should occur, restart it at a later time.
If the SensorCheck still cannot be completed successfully, contact ABB Service.
Value TDC1
Value TDC2
Value HDC1
Value HDC2
Read VeriMass parameters.
• Value TDC1: Temperature change TDC1
• Value TDC2: Temperature change TDC2
• Value HDC1: Heat emission change HDC1
• Value HDC2: Heat emission change HDC2
Assessment of the result
Assessment of the results of the VeriMass parameters TDC1, TDC2, HDC1, HDC2 must be conducted individually and depending on
the application. The following table provides values for a rough estimation.
Parameters
Description / recommended measures
Value TDC1
A deviation of > ±2 K indicates a defect of the sensor elements, the HDC characteristic values are not longer certain.
• Disassemble the sensor, check the sensor element.
• Contact ABB Service, if necessary.
Value TDC2
A deviation of > ±10 % indicates a defect of the sensor elements, the HDC characteristic values are not longer certain.
• Disassemble the sensor, check the sensor element.
• Contact ABB Service, if necessary.
Value HDC1
A deviation of > ±100 % indicates contamination of the sensor element, but the effect on the measured values is minimal in a normal
situation.
• Check the sensor element and clean as needed.
Value TDC2
A deviation of > ±100 % indicates contamination of the sensor element, the effect on the measured values is large in this case.
• Check the sensor element and clean as needed.