Vaisala K-PATENTS PR-43, Руководство пользователя

Страница: 45 / 54

10.1.1 Handling R.I. liquids
Use gloves and safety glasses or goggles. Make sure the ventilation is good, local ventilationis
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.
10.2 Verification procedure
The instrument verification can be performed by using the web interface on the instrument
verification page, see
Verification (page 21) . The standard liquids are placed on the prism as
instructed by the instructions on the screen. Once the liquid hassettled, sample is measured by
clicking the
New verification point button.
The liquids are automatically detected, and the quality of the measurement is
constantlymonitored throughout the process. If the same liquid is measured several times, new
result will replace the older one. A single measurement point can be removed by clicking the
Remove button.
The verification result is shown on the page. Please note that reloading the page removes all
points. After measuring a sufficient number of points the verification may be saved by clicking
the
Save verification button.
In order to avoid verification errors, please make sure:
• The temperature has settled, i.e., the refractometer is in the ambient temperature
• The temperature of the refractometer is between 20 °C and 30 °C
• The prism is cleaned properly before placing thesample
• The test liquid wets the prism properly
The temperature of the refractometer can be checked by following the temperature
measurement on the Verification page. The temperature should be constant.
The sample holder keeps the sample on the prism surface and also blocks the ambient light
from reaching the prism. The universal sample holder PR-1012 can be used with any Vaisala K-
PATENTS refractometer.
Chapter 10 – Instrument verification
43