6 sample loading and mixer insertion – K-Patents PR-23 for K-Patents User Manual

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Use of PR-23 Pharma Refractometer with Laboratory Test Cuvette LTC: Static Sampling

3.6 Sample loading and mixer insertion

The correct liquid sample volume is 2-5 ml (0.07 - 0.17 fl oz). Any larger volume will overflow
from the sample chamber. The sample is measured and inserted using a laboratory pipette
(Figure 3.5). The ball valves on the hoses from the Thermostatic bath are opened and the
temperature is set at the required level.

The mixer paddle is placed into the sample chamber after the sample. Then the mixer is
inserted into the top of the sample chamber. It has to be pushed down far enough, so the
O-ring mounted on the mixer is positioned inside the sample chamber, thus avoiding any
sample evaporation. The mixer is now ready to be plugged in for operation.

Measure and load sample

2 - 5 mi (0.07 - 0.17 fl oz)

Mixer driver

Mixer o-ring

Magnetically driven

mixer paddle

Figure 3.5 Loading liquid sample into the sample chamber and then inserting the LTC mixer into

the top of the sample chamber.