Other Maintenance; Cleaning Precautions - YOKOGAWA DY025 User Manual

1. Tuning method
(1) Ensure the condition of flowrate
The necessary condition for tuning function is zero
flow.
(2) Executing the tuning function.
Set " TUNING AT ZERO" of "K25:N.B MODE".
Wait more 30 second.
(3) Finishing the tuning functions
Using the BT200
(a) Press "DATA" key of BT200 function key.
(b) Ensure the indication of "MANUAL" which is
"K25:N.B MODE"
("NOW TUNING" is indicated during tuning operation.)
Using the indicator
(a) Press "SHIFT" and "SET" key simultaneously.
(b) Press "SET" key and ensure "01" of Lower
indication.
("02" is indicated during tuning operation. Execute (a),
(b) once again.)
2. TLA value
TLA values is possible to change after executing "TUN-
ING". In this case, minimum flowrate is increased.
Minimum flowrate for TLA value is given by below
equation.
Minimum Flowrate Specified Minimum
after changing TLA Flowrate
Value
Ensure minimum flowrate for changing TLA value.
3. Output
After tuning, ensure that the indication reads is zero where
no fluid is flowing.
If the indication reads over zero is done continuously, retry
the tuning and ensure the below condition.
Does high vibrations occur in pipeline?
In this case, refer to "2:INSTALLATION", and keep the
pipeline properly.
TLA Value after Tuning
TLA initial value or defalt value
F060202.EPS
6-4

6.3 Other Maintenance

6.3.1 Cleaning Precautions

Care should be taken to prevent the build up of dirt, dust or
other material on the display glass and data plate. In case of
its maintenance, soft and dry cloth is used.
6. OPERATION
IM 01F06A00-01E