NBK-01
NBK-01 K05/0322
page 11
9. Trouble Shooting
Error: The tank is full but there is no indication
Check that both flanges (process connection), top and bottom, are open to the
vessel, and that the bypass tube fills with liquid.
Check that there is a float in the system.
When the float is installed, check whether it is being blocked by foreign objects
or dirt deposits.
Error: The tank is full but the indication is too low.
Check that the density of the liquid is the same as the density given on the
nameplate.
Check that the float has been correctly installed with the marking "TOP"
upturned.
Check if dirt deposits in the bypass tube are blocking the float.
10.
Maintenance
The drain plug should be opened occasionally, to wash out any deposits in case
the liquid to be measured contains dirt particles, which could settle in the bypass
tube.
If crust formation or crystallisation has taken place, the tank must be emptied or
shut off; the lower cover flange must then be removed. The float should then be
taken carefully out of the bypass. The bypass tube can now be mechanically
cleaned.
The inspection window for the roller indication is made of high-quality plexiglas
(glass for high-temperature display). It should be cleaned with a suitable cleaning
agent.
The indicator requires no further maintenance.
