Handling R.i. Liquids; Verification Procedure; Figure 132 Verification, Pre-Verificaton Checks - Vaisala PR-23 Series User Manual

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The accuracy of the certified standard refractive index liquids is ±0.0002 and they can be
traced back to national standards: N.I.S.T Standards # 1823 and # 1823 II.
The repeatability of PR‑23 sensor, that is the deviation from the latest n
within ±0.0002.
As the specified accuracy of PR‑23 is ±0.0002, the representative level is the sum of the
three accuracy specifications, ±0.0004.
Vaisala provides a set of standard R.I. liquids, PR‑2300, containing these five liquids. You can
order the set directly from Vaisala or your nearest representative.
16.1.1 Handling R.I. liquids
Use gloves and safety glasses or goggles. Make sure the ventilation is good, local ventilation
is preferable. Please review the safety instructions and the MSDS shipped with the liquids
(valid inside R.I. range 1.30-1.57, safety markings valid in EU/EEA areas). Do not put tissues
or liquid bottles in household waste, dispose of waste according to local regulations for
chemical waste.
16.2 Verification procedure
To start the verification process, select 1 VERIFICATION in the Main menu of your sensor.
The first verification display instructs you on the pre-verification procedure:
Figure 132 Verification, pre-verificaton checks
When you are finished with the preparations, press CONTINUE (right-most soft key) to start
the verification process.
The verification itself is done by the refractometer system. Follow the instructions on screen
and apply one RI liquid at a time on the sensor and press VERIFY (right-most soft key). See
the following figure.
Chapter 16 – Sensor verification
calibration, is
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