Toshiba LF434 - Manual (Page 140)

TOSHIBA
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IMPORTANT
(1) It is rccomnicndcd that the detector pipe be eJeaned oitce a year.
(2) Use always new packing when mounting the flowmeter detector in the pipeline.
I CJeunin^ the pipe wall inside of detector
If the fluid to be measured comains slurry; a high concentration of electrically conductive
solids, the sluri7 may accumulate as sticking on the pipe wall inside of detector.
The slicking causes a reduction of flow measuring outputs when it is not cleaned inside pipe
of detector for a long time,
The flowmeter needs to make sure it remains around (he wall inside pipe or not when the
following condition had happened.
(1) The flowmeter becomes a reduction of its output.
(2) The flowmeter can not improve its output in spile of being calibrated.
The flowmeter is required to remove along with clean it using a soft brush. It will be come
back the usual and stable flow measurement after cleaning.
The pipe w all is never scratched when cleaning.
^Toshiba recommends to clean inside pipe periodically when this condition will
become easily.
*lt is better to choose the suitable diameter which becomes more than 3 m/s as its
flow'velocity 10 avoid this condition generally.
*Tf uninstall the flowmeter(delector) from the pipe flange, necessarily install new pak-
ings.
Notes; Before uninstalling the ilowme(er(detecior) from the pipe flange, necessarily confirm
the iluid of temperature and chemical property, and empty the fluid from detector.
Prepare the w a y to protect operator and system from had influence; high temperature
fluid and chemical property
Operative life
The operative life of this flowmeter is 10 years from the dale of shipment. 'I’he life of the
flowmeter differs depending on the environ menial conditions and the way it was used. To
extend the life of the llowinctcr, inspect the flowmeter periodically and clean or replace
components it necessary.
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