M-4913-L Instruction Manual for PRS-TMM12 Sanitary RTD Transducers
GENERAL DESCRIPTION
The Omega PRS-TMM12 series transducers are
designed as direct immersion instruments for use in
Sanitary Clean-In-Place (CIP) systems, and are 3-A
approved to standard 74-03. They include a
Tri-Grip® flanged housing for easy installation into
Food, Dairy and Biopharmaceutical systems that
conforms to the dimensions for “Hygienic Clamp
Ferrules” as specified in Part DT of ASME
BPE-2007. An M12, 4-pin male connector provides
a 4-20 milliamp connection to process control or
monitoring equipment completes the assembly.
To connect the transducer to your instrumentation,
simply install an M12 extension cable to the
transducer’s M12 connection noting the positive
and negative pin locations above. The transmitter
provides a 4-20 milliamp signal when connected to
a constant voltage power supply. The transmitter
will operate with an input voltage from 8 to 35 Vdc,
24 Vdc is recommended.
WIRING CONFIGURATION:
The sensing portion of the transducer consists of a
probe stem containing a 3-wire PT100 Platinum
RTD (Resistance Temperature Detector) that meets
the resistance vs. temperature characteristics of the
IEC 60751 (alpha = .00385Ω/Ω/°C nominal). The
sensing element is connected to an Omega TX94A
4-20 milliamp transmitter which is located inside
the housing. The M12 connector is connected to
the +PS and –PS transmitter connections as shown
in the following detail.
PROCESS CONNECTION
The Omega PRS-TMM12 is normally supplied with a
1-1/2"-16AMP flange (other sizes are also available) so
it can be easily installed into new or existing systems.
A commercially available gasket is placed between the
transducer and process connection, with a clamp used
to complete the connection as shown above.
The transducers are made from 316L Stainless Steel,
with wetted surfaces that have a surface finish of 32
microinches or better. Care should be exercised when
handling the sensors so that the surface finish is not
damaged during handling or installation.
GENERAL DESCRIPTION
Disassembly (See Figure Above):
To access the transmitter inside the housing do the
following:
1. Hold the housing and using a 1/2" wrench
applied to the flats just below the connector,
unscrew the cap from the housing in a counter
clockwise direction.
2. The M12 connector in the cap is connected to
the transmitter by two wires. Carefully move
the cap away from the housing making sure to
not pull the connector wires from the
transmitter.
The transmitter is an Omega TX94A-1 or -2
depending on the ranging option specified. An
instruction manual for the TX94A transmitter is
included with each PRS-TMM12 transducer,
please see that instruction manual for information
Transmitter Zero and Span Adjustments: