How The
WMI
Series Magnetic Level Indicator Works
Each
WMI
Series Magnetic Level WMI consists of three basic parts.
1.
The Chamber: Usually manufactured out of Stainless Steel, but available in Hastelloy, Alloy 20, and other
materials. The chamber allows for measurement as well as containment of the liquid to be measured.
2.
The Float: Contains a Magnet assembly. The float is engineered to ensure buoyancy based on the specific
gravity, temperature, and pressure of the liquid to be measured. Each float is weighted so the liquid level will be
equal to the position at which the magnet is mounted in the float.
3.
The Indicator: Mounted outside of the chamber, includes magnetized wafers or flags that react to the magnet
included in the float.
The chamber is mounted parallel to the tank application. The liquid level in the chamber will match the movement
of the liquid level of the tank. The float movement matches the liquid movement and causes the reaction of the
visual indicator.
How to Install The
WMI
Series Magnetic Level Indicator
Use care in lifting the instrument from the package or crate. Remove any flange covers or thread caps. If possible,
always install isolation valves between the Level Gauge and the process tank. This will allow for gradual
pressurization of the Level Gauge chamber as well as facilitate any future maintenance necessary. The gauge should
be mounted level to ensure proper float travel without friction.
The
WIKA
WMI
Series Magnetic Level Indicator arrives complete with the float installed. No further assembly
should be required. Included with this instrument is a hand magnet device. The hand magnet device should be
used to properly position the orientation of the flags. As a result of shipping, the flag indicator may not properly
portray the position of the float.
WARNING:
IF THIS CHAMBER OR SYSTEM REQUIRES A HYDROSTATIC TEST,
THE FLOAT
MUST
FIRST BE REMOVED!
The float is designed to withstand the maximum pressure specified for the level application. Damage can occur to
the float if it is not removed during Hydrostatic Testing.
Once the hydrostatic test is complete, the float should be re-installed in the gauge. Each float is etched with the
serial number of the instrument, the specific gravity, and arrows “Up” showing the correct positioning of the float
in the chamber. The end of the float with the “Up” arrows should be positioned upward as the float is deployed in
the instrument. If the float is installed upside down, problems will arise with associated instruments and the
accuracy of the level gauge.
