Section
1-1
1 Introduction
Introduction
A diaphragm seal system consists of a pressure transmitter, a
diaphragm seal, a fill fluid, and either a direct mount or capillary style
connection.
During operation, the thin, flexible diaphragm and fill fluid separate
the pressure sensitive element of the transmitter from the process
medium. The capillary tubing or direct mount flange connects the
diaphragm to the transmitter.
When process pressure is applied, the diaphragm is displaced,
transferring the measured pressure through the filled system, by way
of the capillary tubing, to the transmitter element. This transferred
pressure displaces the sensing diaphragm in the pressure-sensitive
element of the transmitter. This displacement is proportional to the
process pressure and is converted electronically to an appropriate
current, voltage, or digital HART
(Highway Addressable Remote
Transducer) output signal.
This manual is designed to assist in installing, operating, and
maintaining the Rosemount Model 1199 Filled Systems for Pressure
Transmitters. The manual contains supplemental information about
the transmitter/seal system that is not covered in the correlative
transmitter manual.
The information is organized into the following categories:
• Installation
• Calibration
• Maintenance/Troubleshooting
See Product Data Sheets 00813-0100-4016 in North America or
00813-0201-4016 in Europe for more detailed information on specific
Rosemount diaphragm seals.
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