K-patents PR-23 for K-Patents Appendix Manual de usuario descargar pdf (Pagina 21)

Installation of PR-23 Pharma Refractometer

3.6 Refractometer Instrument Verication

The operational procedure checking the refractometer calibration accuracy, linearity and

short-term repeatability and reproducibility consists of verication tests using Cargille

standard Refractive index n

liquids.

The verication of the refractometer calibration is performed whenever a new K-Patents

Laboratory Refractometer is qualied as a part of the validation process, and also if any of

the following occurs:

●

There is a replacement of optical parts (prism and prism gasket).

●

Refractometer readings reect an unusual shift, or are outside of the acceptable limits,

and other means of assessing and correcting unacceptable control values fail to

identify and correct the problem.

Verication is recommended to be performed once every 12 months (or more frequently if

specied in the client’s own quality system) as a routine quality control check. Verication

is carried out using the Sample Holder PR-1012 and the set of Cargille standard refractive

index n

liquids. A set (R.I. Liquid set PR-2300) is supplied by K-Patents. The Sample Holder

PR-1012 consists of a sample receptacle with O-ring seal around the bottom aperture.

Before commencing the verication process make sure that your refractometer and sample

holder are at normal room temperature. Preferably take all components to the laboratory

already one day prior to the verication. Check the condition and expiry date of your

Standard Refractive Index Liquids and that you also have the required cleaning solution

(e.g. Isopropyl alcohol) and cleaning tissue to clean the sensor wetted surfaces and the

sample holder.

For full Sensor verication instructions see PROCESS REFRACTOMETER PR-23,

INSTRUCTION MANUAL Section 13.

After verication of the PR-23 sensor, further verication of the Laboratory Test Cuvette and

Sensor combination can be carried out.

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K-patents PR-23 for K-Patents Appendix Manual de usuario Pagina 21