PUBLISHED BY
Vaisala Oyj
Vanha Nurmijärvene 21, FI-01670 Vantaa, Finland
P.O. Box 26, FI-00421 Helsinki, Finland
+358 9 8949 1
Visit our Internet pages at www.vaisala.com.
Symbols and terms used in this manual:
This indicates a warning. It provides safety precauon informaon needed to avoid
injury while operang the refractometer system.
This indicates that something is important for the operaon of the refractometer sys-
tem.
Note. Notes contain addional informaon and hints.
Warning! The process medium may be hot or otherwise hazardous.
Precauons when removing the sensor from the process line:
• Make posively sure that the process line is not under pressure. Open a vent valve to the
atmosphere.
• For a prism wash system, close a hand valve for the wash medium and disable the wash
valve.
• Loosen the clamp cauously, be prepared to ghten again.
• Be out of the way of any possible splash and ensure the possibility of escape.
• Use shields and protecve clothing adequate for the process medium, do not rely on avoid-
ance of contact with the process medium.
• Aer removal of the sensor, it may be necessary to mount a blind cover for security reasons.
It is the user’s responsibility to follow manufacturer’s safety and operang instrucons. The
client’s organizaon has the responsibility to develop and maintain occupaonal safety and
create a safety culture where individuals are expected to follow safety instrucons at all mes.
Any negligence towards safety instrucons or failure to comply with safe pracces should not
be tolerated. It is the manufacturer’s responsibility to produce goods that are safe to use when
instrucons are followed.
Warranty
For standard warranty terms and condions, see www.vaisala.com/warranty.
Please observe that any such warranty may not be valid in case of damage due to normal wear
and tear, exceponal operang condions, negligent handling or installaon, or unauthorized
modicaons. Please see the applicable supply contract or Condions of Sale for details of the
warranty for each product.
THE PASSWORD FOR PR-23 IS 7 8 4 5 1 2
This product manual is delivered to the end user with a Vaisala K-PATENTS® product. Informa-
on in this manual is subject to change without noce. When the manual is changed, a revised
copy is published at hp://www.kpatents.com/.
Document/Revision No. IM-EN-PR23/Rev. 2.00 Eecve: September 2, 2019