Xylem SI Analytics PL-S 82-225pHT VP ProcessLine Manual De Instrucciones página 24

Resistance thermometers
Range of application
The resistance thermometers with a secondary platinum electrode are made for
compensation of temperature in the process of industrial measurement. The platin ring of the
W 2161 HD is able to complete different functions.
•
As Redox electrode, if a secondary electrode from a prior installed measuring chain is
available as reference.
•
As grounding rod in not well conducting media, plastic cases, and so forth.
•
As secondary electrode, as needed for the process of sensor monitoring.
Temperature measurement
The temperature sensor should be dipped at minimum10 mm into the measuring solution
Measurement set-up and installation information
The temperature sensor is part of a measurement device which consists of the following:
• Resistance thermometer
• Measurement transducer
• Immersion, flow-through or interchangeable mounting assembly
• Measurement cable
Please note the operating instructions of the measurement transducer and the mounting
assembly as well as the configuration of the connection cable. Prior to installing the
temperature sensor, please check the connection thread for contamination and adequate
freedom of movement. Screw the temperature sensor with a maximum of 3.5 Nm ("hand-
tight") into the mounting assembly. With regard to the installation of the sensors, please
observe the applicable technical details of the mounting assembly.
Electrical connection details
When connecting the temperature sensor to the measuring transducer, the electrical
connection information provided by the manufacturer is to be observed.
Storage and maintenance
The temperature sensor should be stored at temperatures between 0 and 40°C.
Cleaning
Contamination on the sensor will lead to measurement deviation and will be replaced with
the following procedure:
• To remove deposits, please use diluted mineral acids (e.g. diluted hydrochloric acid)
Organic contamination can be removed using appropriate suitable solvents or alkaline
solution.
• Grease should be removed with tenside solutions or alcohol.
• Protein with hydrochloric pepsine solution (cleaning solution L 510).
During maintenance, please note the following details:
• Never use corrosive cleaners, as household cleaning agents or abrasive paper for cleaning
the resistance thermometer.
• After cleaning, the temperature sensor should be rinsed with distilled water.
• When using aggressive cleaning agents, please use protective glasses and protective
gloves.
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