Flowline LV55 FloaTek - Manual (Page 11)

17 SEPT 08 Float-Tek LV55 Series 11 of 12
Rev A MN201345
Maintenance
Maintenance should consist of inspection to see that the float is free to move and not coated with
any substance, which would change its weight or volume significantly. If this occurs, the float
should be cleaned. This is easily accomplished without disturbing the installation. In addition,
the stem may be wiped down to remove any build-up. The only repair possible in the field is
replacement of either the float or stem. Dents or nicks on the float are usually of no consequence
to operation.
Cautions
FLOWLINE manufactures a wide range of liquid level switches and technologies. While each
of these switches are designed to operate in a wide variety of applications, it is the user's
responsibility to select a switch model that is appropriate for the application, install it properly,
perform tests of the installed system, and maintain all components. The failure to do so could
result in property damage or serious injury.
1. The pressure, temperature and electrical limitations shown for the specified level sensor
must not be exceeded.
2. The pressures and temperatures must take into consideration possible surges in the
temperature and pressure of the system.
3. The liquids used must be compatible with the materials of construction. Specifications of
materials will be given upon request.
4. Life expectancy of the sensor varies with applications. Contact the factory if life cycle
testing is required.
5. Ambient temperature changes can affect sensor set points, since specific gravities of
liquids vary with temperature. Consult factory for assistance.
6. Level sensors have been designed to be shock and vibration resistant. For maximum life,
both should be minimized. Consult factory for assistance.
7. Excessive contaminants in fluid may inhibit float operation and occasional wipe down
may be necessary.
8. Physical damage to product may render product unserviceable.
9. Installation in a vessel made from magnetic materials may affect operation.
Testing the installation:
Verify proper wiring, power supply and loop resistance. If transmitter is not functioning
properly, isolate the transmitter from the system and wire as shown below. Multimeter should
read 4 mA with float at the bottom and 20 mA with float at the top of the transmitter.