Scope of Manual
This instruction manual provides installation, operation, maintenance, and parts ordering information for the Fisher
646 transducer. Refer to separate manuals for instructions covering equipment used with the transducer.
Do not install, operate or maintain a 646 electro‐pneumatic transducer without being fully trained and qualified in
valve, actuator and accessory installation, operation and maintenance.
To avoid personal injury or property damage it
is important to carefully read, understand, and follow all of the contents of this manual, including all safety cautions
and warnings.
If you have any questions about these instructions, contact your
Emerson Process Management sales
