Install
WIKA
WMI
Series Magnetic Level Indicators
according to the type connection ordered. Ensure all
gaskets or sealants are in place, and then tighten all fasteners to the proper torque. For wiring instructions of a
transmitter or switch unit, refer to the installation manual for that device. If no manual is available or is missing,
please contact the factory for a replacement copy.
IMPORTANT!
Once the level gauge is attached to the application and the vent and drain connections are confirmed to be closed,
utilize the following
procedure for start up
, ESPECIALLY FOR
HIGH PRESSURE
AND TEMPERATURE
APPLICATIONS!
1.
Slowly open the top Valve first. This will allow for equalization of pressure in the chamber to the process.
2.
Slowly open the bottom Valve. Liquid can now fill the chamber gradually.
Failure to follow this procedure can lead to damage of the float!
The tank level should be raised to maximum height to check the upper connection for leaks. If applicable, verify
that all switch operation is correct and that the transmitter indicates the correct level.
WARNING
Once the pressure in the Gauge Chamber has been equalized with the process pressure, DO NOT open
the vent or drain connections. Damage to the float can occur!
See the section entitled “Maintenance” to learn the proper procedure for removing this instrument from service.
Functional Test
The best way to provide a functional test for this instrument is to raise and lower the level of the material in the
tank, and, therefore, the gauge. Many times this is not possible. If this is the case, utilize one of the following
options.
1.
Make sure the chamber is isolated from process conditions by closing the valves at the connection points. Drain
off any remaining liquid in a manner compatible with plant requirements. As most floats will be buoyant upon
water, slowly fill the level gauge through the vent connection. Observe the movement of the visual indicator as
the gauge fills with water. If applicable, monitor the outputs of switches and transmitters accompanying this
instrument.
2.
If it is not possible to fill the gauge with water or another liquid, either open the drain connection or remove the
bottom flange. Carefully manipulate the float with a piece of instrument tubing or a device that affects the
movement of the float in the chamber. Observe the movement of the visual indicator as the float moves. If
applicable, monitor the outputs of switches and transmitters accompanying this instrument.
3.
Often times there will not be enough ground clearance to insert an object to manipulate the float. If this is the
case, such a test can be completed prior to installation while the instrument is lying on the floor.
