Valve / Actuator Mounting - Emerson TopWorx 4310 Instruction Manual

4310 Wireless Position Monitor
December 2011

Valve / Actuator Mounting

If ordered as a part of a control valve assembly, the factory will mount the wireless position monitor on the actuator
and calibrate the instrument. If you purchased the wireless position monitor separately, you will need a mounting kit
to mount the wireless position monitor on the actuator. The following procedures are general guidelines you should
consider when mounting the wireless position monitor. See the instructions that come with the mounting kit for
detailed information on mounting the wireless position monitor to a specific actuator model.
Note
All mounting materials should be non-ferrous. Ferrous materials are magnetic and may affect feedback.
The feedback system for the 4310 wireless position monitor utilizes a magnetic field for true linkage‐less,
non‐contacting position measurement. In order to prevent inadvertent stem movement while the instrument is in
operation magnetic tools (such as a magnetic‐tipped screwdriver) should not be used.
CAUTION
The magnet material has been specifically chosen to provide a long‐term stable magnetic field. However, as with any
magnet, care must be taken when handling the magnet assembly. Another high powered magnet placed in close proximity
(less than 25 mm) can cause permanent damage. Potential sources of damaging equipment include, but are not limited to:
transformers, DC motors, stacking magnet assemblies.
CAUTION
General Guidelines for use of High Power Magnets with Position Monitoring Instruments
Use of high power magnets in close proximity to any position monitoring instrument which is operating a process should
be avoided. Regardless of the model, high power magnets can affect feedback accuracy. Technicians should avoid the use
of high power magnets in close proximity with any position monitoring instrument.
Use of Magnetic Tools with the 4310
D Magnetic Tip Screw Drivers – Magnetic tip screw drivers can be used to work on the 4310.
However, they should not be brought in close proximity to the magnet assembly
(located at the back of the instrument) during process operations.
Note
As a general rule, do not use less than 50% of the magnet assembly for full travel measurement. Performance will decrease as the
assembly is increasingly subranged.
The linear magnet assemblies have a valid travel range indicated by arrows molded into the piece. This means that the Hall sensor
(on the back of the 4310 housing) has to remain within this range throughout the entire valve travel. See figure 8.
The linear magnet assemblies are symmetrical. Either end may be up.
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Instruction Manual
D103391X012