Emerson Rosemount 245 Manual de instruções - Página 7
Procurar online ou descarregar pdf Manual de instruções para Acessórios Emerson Rosemount 245. Emerson Rosemount 245 18 páginas. Toroidal flow-through conductivity sensor
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Instruction Manual
LIQ-MAN-245
Section 1: 245 Sensor
1.1
Features and Applications
The 245 Sanitary Flow-Through Toroidal Conductivity Sensor is intended for use in the
pharmaceutical, biopharmaceutical, and food and beverage industries where a conductivity
sensor that does not obstruct the process flow is required.
The sensor consists of two toroids surrounding a PEEK liner through which the liquid flows.
An alternating voltage applied to the first toroid induces a voltage in the liquid, which causes
an ionic current to flow. The ionic current is directly proportional to the conductance of the
liquid. The ionic current, in turn, induces a proportional current in the second toroid. The
analyzer measures this current and displays the conductivity of the liquid.
For a current to flow in the second toroid, a complete electric circuit must exist around the
toroids. The sample passing through the toroid openings forms part of the circuit. The metal
mounting flanges at the end of the sensor, which contact the liquid and are connected by the
metal housing passing outside the toroids, complete the circuit.
The 245 sensor is available with 0.5, 1.0, 1.5, and 2 inch Tri Clamp connections. The liner
meets the requirements of 21CFR177.2415, and the O-rings meet 21CFR177.2600. Both the
liner and the O-rings are compliant with USP Class VI requirements.
The 245 sensor is easy to install. It clamps into the process piping between two Tri Clamp
flanges. Installation of special grounding rings is not needed because contact rings are
already built into the sensor. A junction box to facilitate wiring is included.
Conductivity depends strongly on temperature, and conductivity measurements are typically
corrected to a reference value. A Pt 100 or Pt 1000 RTD, provided by the user, can be wired
into the sensor junction box, allowing the analyzer to measure temperature and use it for
automatic temperature correction.
The 245 is not sensitive to flow rate or direction. It does not obstruct the process flow.
The 245 Sanitary Flow-Through Conductivity Sensor is compatible with the 1056, 56, 5081T,
and 1066-T.
1.2
Specifications
Installation Type:
Conductivity Range:
Process Connections:
Wetted Materials:
Surface Finish:
Minimum Temperature:
Maximum Temperature:
Maximum Pressure
Maximum Pressure (all others): 100 psig (791 kPa abs)
Shipping Weight:
245 Sensor
Flow through
Consult analyzer product data sheet
½ inch, 1 inch, 1 ½ inch, and 2 inch
316L stainless steel (mounting flanges); unfilled PEEK (liner); EPDM
(O-rings). PEEK liner meets 21CFR177.2415 and USP Class VI. EPDM
O-rings meet 21CFR177.2600 and USP Class VI,
Mounting flanges have a 16 micro inch (0.41 um) Ra surface finish.
PEEK liner has a 32 micro inch (0.81 um) Ra surface finish.
32 °F (0 °C)
250 °F (121 °C) continuous; 266 °F (130 °C) in steam for 45 minutes
(½ inch sensor only): 300 psig (2170 kPa abs)
9 lb (4.5 kg)
245 Sensor
June 2017
1