Float Tank Gauge LT11/12
Hauser
41
6.2
Daily checking
The level gauge does not require any operation after it has been properly mounted on a tank.
6.3
Periodical checking
Follow the Table below to do the periodical inspection.
Periodical inspection Procedures
Check Item
Check Procedure
Gauge head
Corrosion check and cleaning
of tape protective pipe
After opening the rear cover of the gauge head,
check accumulation of rust. If necessary, remove
rust by tapping the protective pipe with a
wooden hammer.
Check of reduction gear
engagement and bearing
After removing the indicator cover, rotate the
reduction gear to check engagement and confirm
that backlash is within 1 mm of indication.
Check the bearing for wearing in the similar pro-
cedure
Friction on tape drum
and sprocket
After opening the rear cover of the gauge head,
check bearings of drums for wearing, corrosion
and dust contamination. Clean if required.
Characteristic change of
conster spring
Operate the drive checker for checking operation
of the level gauge. If constant indications can not
be obtained, clean the conster spring. If constant
indications cannot be
obtained after cleaning, replace the conster spring
with a new one.
Water drops and
dimming on indicator window
Check the indicator cover for tightened
condition. Also check to see if foreign matter is
caught in the gasket.
Check of drive checker
Inside the gauge head, check the checker spring
for its deformation and operating condition.
Sheave elbow
Sheave elbow friction
In Sheave elbow, remove measuring tape from
roller and check to rotate smoothly.
Remove bearing and check friction condition.
Remove extraneous matter from roller.
6 Maintenance
