If tuning is executed, the following parameter setting
values change.
K25/Noise balance mode = MANUAL(0)
K26/Noise ratio = xed value
Note, however, that the measurable minimum ow
velocity increases when the K10/TLA values are
changed from their initial values.
1. Checking the owrate
Be sure to check that uid ow has stopped.
2. Executing tuning
Execute tuning with K51/Tuning at zero set to "1:
Execute". After executing, wait 30 seconds or more.
3. Completion of tuning
(1) Checking completion of tuning
● Checking on the HART Conguration Tool
(a) Move to Maintenance > Signal controls > Tuning
status
(b) Tuning is completed if Tuning status is indicated
as either of "Pass" or "Failure". If the Tuning
status is "Unknown", repeat steps (1) and (2).
(During tuning, "Running" is displayed.)
● Checking on the indicator
Press the INC key to move to K52. Tuning
is completed if the parameter data (on lower
indication) is "1" or "2".
(During tuning, "3" is displayed.) If the indication is
"2" or "0", repeat tuning.
(2) Checking the TLA
The K10/TLA values sometimes change which
causes the measurable minimum ow velocity to
increase after tuning is completed.
The measurable minimum ow velocity after TLA is
changed is given by the following formula.
Minimum Flowrate
after changing TLA
Value
Specified Minimum
Flowrate
TLA Value after Tuning
TLA initial value or default value
F0704.ai
Make sure that there are no problems in the
measurable minimum ow velocity after TLA is
changed.
(3) Check output
Make sure that there is no output when the ow rate
reading is zero.
If there is continuous output when the ow rate
reading is zero even after tuning, repeat tuning
check the following item.
● Are vibrations abnormally high in the pipeline?
In this case, read Section 3.1 "Installation
Precautions", and keep the pipeline supported.
<7. Operation>
42
IM 01F07A01-01EN
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