Orion Instruments Atlas - Manual (Page 17)

46-638 Magnetic Liquid Level Indicators 17
2.3.2 Top Mount
Problem Solution
The float assembly or visual indicator is Make sure the vessel opening or flange connection that the to
moving slowly or not at all. mount flange connects to is level.
The top mount guide rod assembly may be bent. Visual inspec-
tion is required.
The process fluid in the vessel may be too viscous, Heating the
vessel to make the process fluid more liquid may be required.
The specific gravity of the process fluid and the float may need
to be reverified.
Visual inspection of the float inside the process fluid may be
required to see if the float has collapsed.
My scale is at the center of the zero mark on The scale assembly is mounted to the chamber using stainless
the outside of the top mount chamber but steel gear clamps. It can be easily adjusted in the field using a
the indicator is above or below zero. screwdriver. Make sure the scale zero is in line with the zero
mark on the outside of the top mount chamber.
The float stop spring at the top of the chamber is there to cush-
ion the magnet assembly. Make sure the bottom float stop tube
is not bent or broken
The float stop tube is at the bottom inside the chamber. It is
there to stop the magnet assembly at the zero mark on the out-
side of the chamber
2.4 Spare Parts
Spare parts are available for Magnetrol/Orion MLIs and
certain switches and transmitters. Please consult the factory.
Have the unit model number and serial number available
for reference.
2.5 Maintenance
Periodic inspections are a necessary means to keep your
level control in good working order. This control is a safety
device to protect the valuable equipment it serves.
If the process liquid is clean (no solids or deposits), the
MLI should require minimum maintenance. If the process
liquid is dirty (solids and deposits), it is recommended the
external cage be isolated from the process and flushed peri-
odically. For complete cleaning, after draining the unit,
remove the bottom flange and float, inspect cage and float
for buildup and clean if required.
Magnetic traps are available to prevent magnetic particu-
late travel from the vessel to the chamber.