Xylem E-Line Refractometer ATC Range - Manual (Page 3)

Product Description
The E-Line Refractometer ‘ATC Range’ is ideal for use in the soft drinks and food industries as well
as other applications requiring concentration measurements such as industrial coolants and
quenchants.
Applying the sample to the refractometer:
Lift the illuminator flap
1 , drip the sample on to the prism 2 then close the illuminator flap. View the
borderline (light/dark demarcation line) through the eyepiece 3 .
Optical glass is relatively soft and care should be taken not to scratch the prism surface. Do not
use metal spatulas or glass rods to apply samples but instead use softer materials such as plastic.
The E-Line Refractometer ATC Range can also be used for testing solid substances such as apples,
melons, grapes, sugar beet and potatoes. Cut a slice of the substance about 2mm thick and slightly
smaller than the prism area. With the flap lifted, apply the slice to the surface of the prism taking
care to obtain a good contact.
Eyepiece 3
Prism 2
Illuminator Flap 1
Hand Grip Calibration Screw 4
Focussing the scale:
Hold the instrument up to the light and look through the eyepiece. Rotate the eyepiece to focus
the scale.
Taking a reading:
Read the scale at the border of the light and dark areas. If the scale is completely light then the
sample concentration may be too high for the instrument range.
Cleaning the prism:
Thoroughly clean the prism after use with water or other suitable solvent and dry with clean tissue.
The prism surface could be damaged by strong alkalis or acids if left in contact for long periods of
time. Clean samples from the prism as soon as practicable.
Wiping the prism surface occasionally with alcohol will remove any build-up of oils left from the
samples.
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