Basic Operation - Beta 1759 Mode D'emploi

INSTRUCTIONS FOR USE
Poor Poor
1)
Operation is done in es-
sentially the same manner
as calibration. Open daylight
plate, and place 2-3 drops of
the liquid sample on the main
prism. Close the daylight plate,
so the sample spreads across
the entire surface of the prism
without air bubbles or dry spots.
Allow the sample to rest on the
prism for approximately 30 se-
conds before moving on to step
2. (This allows the sample to
adjust to the ambient tempera-
ture of the refractometer.)
1) Accurate measurement depends on careful calibration. Follow the instructions above closely.
Note: Shifts in ambient temperature will necessitate recalibration, and the sample must be
allowed ample time to adjust to the temperature of the prism prior to measurement. The prism
and sample MUST be at the same temperature for accurate results.
2) Do not expose the instrument to damp working conditions, and do not immerse the instrument in
water. If the instrument becomes foggy, water has entered the body. Call a qualified service
technician or contact your dealer.
3) Clean the instrument between each measurement using a soft, damp cloth. Failure to clean the
prism on a regular basis will lead to inaccurate results and damage to the prism's coating.
4) Do NOT measure abrasive or corrosive chemicals with this instrument. They can damage the
prism's coating.
5) This is an optical instrument. It requires careful handling and storage. Failure to do so can result in
damage to the optical components and its basic structure. Used with care, this instrument will
provide years of reliable service.

BASIC OPERATION

As seen when
looking into the
instrument
Good
2)
Hold daylight plate in the di-
rection of a light source and look
into the eyepiece. You will see
a circular field with graduations
down the centre (you may have
to focus the eyepiece to clearly
see the graduations). The up-
per portion of the field should
be blue, while the lower portion
should be white.
WARNINGS – MAINTENANCE
Upper blue field
Boundary line
Lower white field
adjust to here
3)
Take the reading where
the boundary line of blue and
white cross the graduated
scale. Clean the prism care-
fully using a damp, soft cloth.
Do NOT immerse in water.
Read warnings below careful-
ly before use.
EN
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