117
Reference Manual
00809-0100-4803, Rev GA
Troubleshooting
September 2017
Troubleshooting
Note
The following performance limitations may inhibit efficient or safe operation. Critical applications should
have appropriate diagnostic and backup systems in place.
Pressure transmitters contain an internal fill fluid. It is used to transmit the process pressure through the
isolating diaphragms to the pressure sensor module. In rare cases, oil loss paths in oil-filled pressure
transmitters can be created. Possible causes include: physical damage to the isolator diaphragms,
process fluid freezing, isolator corrosion due to an incompatible process fluid, etc.
A transmitter with oil fill fluid loss may continue to perform normally for a period of time. Sustained oil
loss will eventually cause one or more of the operating parameters to exceed published specifications as
the operating point output continues to drift. Symptoms of advanced oil loss and other unrelated
problems include:
Sustained drift rate in true zero and span or operating point output or both
Sluggish response to increasing or decreasing pressure or both
Limited output rate or very nonlinear output or both
Change in output process noise
Noticeable drift in operating point output
Abrupt increase in drift rate of true zero or span or both
Unstable output
Output saturated high or low
5.6
Service support
To expedite the return process outside of the United States, contact the nearest Emerson representative.
Within the United States, call the Emerson Instrument and Valves Response Center using the
1-800-654-RSMT (7768) toll-free number. This center, available 24 hours a day, will assist with any
needed information or materials.
The center will ask for product model and serial numbers, and will provide a Return Material
Authorization (RMA) number. The center will also ask for the process material to which the product was
last exposed.
Emerson Instrument and Valves Response Center representatives will explain the additional information
and procedures necessary to return goods exposed to hazardous substances.
Individuals who handle products exposed to a hazardous substance can avoid injury if they are informed
of and understand the hazard. If the product being returned was exposed to a hazardous substance as
defined by OSHA, a copy of the required Material Safety Data Sheet (MSDS) for each hazardous
substance identified must be included with the returned goods.
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