Toshiba LF470 - Manual (Page 27)

TOSHIBA
6P,8A0,8,0,2
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7. Maintenance and Troubleshooting
A
CAUTION
■ Do not conduct wiring work when ■ Do not touch the LF470 main body
power is applied. when high temperature fluid is be-
ing measured.
Wiring while power is The fluid raises the main
\^Z applied can cause electric V^/ body temperature and can
DON’T
DON’T cause burns.
7.1 Maintenance
IMPORTANT
It is recommended that the detector pipe be cleaned once a year.
■ Cleaning the pipe wall inside of detector
If the fluid to be measured contains slurry; a high concentration of electrically conductive
solids, the slurry may accumulate as sticking on the pipe wall inside of detector.
The sticking 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 the wall inside pipe or not when the
following condition had happened.
(1) The flowmeter becomes a reduction of its output.
(2) The flowmeter caimot improve its output in spite 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 wall is never scratched when cleaning.
*Toshiba recommends to clean inside pipe periodically when this condition will be­
come easily.
*It is better to choose the suitable diameter which becomes more than 3 m/s as its
flow velocity to avoid this condition generally.
Notes: Before uninstalling the flowmeter(detector) from the pipe, necessarily confirm the
fluid of temperature and chemical property, and empty the fluid from detector. Pre­
pare the way to protect operator and system from bad influence; high temperature
fluid and chemical property
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