1 design qualification – K-Patents PR-23 for K-Patents User Manual
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Document/Revision No. IM-GB-PR23-ACP: Rev. 1.0 Effective: December 15, 2011
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Appendix to the Instructions Manual PR-23
1.1 Design Qualification
Design Qualification (DQ) typically consists of manufacturer’s documentation to verify that 
the proposed design of the K-Patents Refractometer is suitable for the intended purpose. 
K-Patents Pharma Refractometer PR-23-AC is an in-line real-time instrument that is 
designed to meet the pharmaceutical industry standards and guidelines including PAT, 
GMP, CIP/SIP and validation. K-Patents Pharma Refractometer PR-23-AC fulfills the 
pharmaceutical drug production regulations for process wetted part materials, sealing, and 
surface roughness. No animal originated media are used in the machining and polishing 
processes. The model PR-23-AC meets the 3-A Sanitary Standard requirements and is 
EHEDG (European Hygienic Equipment Design Group) tested.
The K-Patents refractometer has an Ethernet communications solution. The transmitter uses 
the IP protocol to communicate over the Ethernet to any type of computer. This eliminates 
human error and allows for easy capture of refractometer generated measurement and 
diagnostic data for storage, analysis and reporting. K-Patents provides a software package 
for data downloading. Full software specifications are freely available to users who wish to 
develop their own communications program. Access to the refractometer and the generated 
data can be restricted to authorized personnel using password and padlock protection.
K-Patents refractometers are designed, manufactured and serviced under ISO 9001 quality 
system and procedures that guarantee the accuracy and repeatability of the measurement 
results. Each refractometer sensor is provided with a calibration certificate comparing 
a set of standard liquids to the actual sensor output. K-Patents verifies the calibration 
of all delivered instruments according to a procedure similar to the one described in the 
PROCESS REFRACTOMETER P2-23 INSTRUCTION MANUAL, 
Section 13.
K-Patents Pharma Refractometer PR-23-AC wetted parts materials comply with the contact-
compatibility of a substance with pharmaceutical materials. Gasket materials conform to the 
FDA requirements 21 CFR 177.2600 and to biocompatibility standards according to USP 
Class VI. 
K-Patents has an ISO 9001 certified quality system, which covers all its functions. The 
quality system is ISO 9001 certified by Det Norske Veritas. The quality performance is 
improved by critical self-assessment, internal auditing and feedback system. The chain of 
quality starts from the subcontractors with whom K-Patents maintains a quality contracting 
and regular auditing system. The internal quality functions, from verification of incoming 
products to packing and delivery, are based on defined procedures. 
K-Patents Process Refractometers and support services are available to customers anywhere 
in the world. Application, installation and technical assistance are provided both locally by the 
representatives and also by the headquarters in Finland and the branch in the U.S.
K-Patents warrants that all products made by K-Patents shall be free of defects in material 
and workmanship. K-Patents agrees either to replace or repair free of charge, any such 
product or part thereof which shall be returned to the nearest authorized K-Patents repair 
facility within two (2) years from the date of delivery.
