Vaisala K-PATENTS PR-43, User Manual

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2. Product overview
The Vaisala K-PATENTS® in-line process refractometer is an instrument for measuring liquid
concentration in the process line. The measurement is based on the refraction of light in the
process medium, an accurate and safe way of measuring liquid concentration. See
Principle of
measurement (page 35) for more information on the measurement principle.
PR-43 refractometers come in three standard packages: a stand-alone refractometer with Web
user interface WI, a refractometer with Compact user interface CI and 1-4 refractometers with
Multichannel user interface MI.
The web user interface WI is for direct control system integration in applications where no
industrial computer or monitoring display is required. For more information, see
Refractometer
connections (page 8) , Startup (page 23) and Web interface (page 16) . Compact user
interface provides a local or remote display with the same information as WI (see Compact
User Interface CI Instruction Manual ). Multichannel user interface provides high performance
industrial computing e.g. for multiple connectivity and wash control (see Multichannel User
Interface MI Instruction Manual ).
2.1 Safety
This product has been tested for safety. Note the following precautions:
Only licensed experts may install electrical components. They
must adhere to local and state legislation and regulations.
WARNING!
The process medium may be hot or otherwise hazardous. Use shields and protective clothing
adequate for the process medium. Do not rely on avoidance of contact with the process
medium.
Wear protective eyewear.
Wear protective gloves.
Precautions when removing a sensor from the process line :
• Check that the process line is depressurized and drained
• Loosen the flowcell screws cautiously; be prepared to tighten again
• Ensure you are clear of any possible spillage and you have a clear emergency escape path
Chapter 2 – Product overview
7