5
For the models SK-106R and SK-107R
Accessories: Wipe-out cloth, carrying case, screwdriver, dropper, block for adjustment, oil for
adjustment
- Using the Refractometer after Adjustment with Oil for Adjustment -
Note: Be sure to perform the scale adjustment before using this instrument for the first time each
day, or if the ambient temperature changes.
(1) Place yourself facing the light source and look through the eyepiece to see the scale. Adjust
the focus to suit your eyes by rotating the eyepiece clockwise or counterclockwise.
(2) While holding the instrument as shown in Figure 1, open the cover plate and place oil for
adjustment on the center of the prism to become uniform. Put block for adjustment (7 x
14mm) while with designating the smooth aspect of the block as under and in order for the oil
to spread the whole surface. Then close the cover plate. Look through the eyepiece to see the
white and blue fields as shown in Figure 2 below.
(3) Scale adjustment
This instrument is designed to allow for adjustment at 20°C, and the intersection of the
boundary of the white and blue fields is set to 78.5% when the oil attached is measured.. If
the boundary is not at 78.5%, slowly turn the adjusting screw clockwise or counterclockwise
with the flat-bladed screwdriver supplied until the intersection is at 78.5% (Figure 2).
(4) After completing the adjustment, thoroughly clean the prism and the cover plate with the cloth
supplied.
(5) Measurement
To take a reading, place a few drops of the liquid to be measured on the prism. Look through
the eyepiece at the white and blue fields on the scale. The concentration of the liquid being
measured is determined by the intersection of the boundary of those fields. For example, in
Figure 3 the concentration is 68%.
Figure 1
Figure 2
Figure 3
(SK-106R)
(SK-106R)
light
block
