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546NS Transducer
June 2021
Do not install, operate or maintain a 546NS 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 sales office
Description
The 546NS transducer (figure 1) receives either a voltage (VDC) or a current (mA DC) input signal and transmits a
proportional pneumatic output pressure to a final control element. A typical application is in electronic control loops
where the final control element, generally a control valve, is pneumatically operated. The input signal, output pressure
range, and electrical classification, if approved, of each transducer is indicated on the nameplate attached to the
cover.
The 546NS transducer is designed for nuclear power applications. The 546NS construction includes materials that
provide superior performance in elevated temperature and radiation environments.
The O‐rings are EPDM (ethylene propylene) and the diaphragms are EPDM/NOMEXt. EPDM demonstrates superior
temperature capability and shelf life over nitrile. The NOMEX diaphragm fabric demonstrates improved strength
retention at elevated temperature and radiation conditions.
CAUTION
Use a clean, dry, oil‐free air supply with instruments containing EPDM components. EPDM is subject to degradation when
exposed to petroleum‐based lubricants.
Under the 10CFR50, Appendix B, quality assurance program, the 546NS transducer is qualified "commercial grade
dedicated". These can be supplied as 10CFR, Part 21 items.
2
before proceeding.
Instruction Manual
D103425X012
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