5
3.2. MEASURING
• Open the cover plate of the refractometer.
• Drop 1-3 drops of the liquid on the prism surface with the
help of the pipette included in the set
•
Close the cover plate very carefully and firmly - so the water
is distributed to the entire surface of the prism without bub-
bles and dry spots.
• Hold the refractometer with the cover against a light source
(like lamp).
• Wait around 30 seconds - for the temperature compensation
to take place.
• A light and dark area are now visible from the
ocular. The borderline between them indicates
the refractive index on the scale which is also
visible on the scale. It indicates the measured
value.
4.
MAINTENANCE
• After each use, clean the prism with a slightly moistened, soft
cloth.
• Clean the instrument before storage and after each use.
Residue left from liquids, can damage the prism surface.
• Do NOT immerse the instrument in water – if the view inside
the instrument becomes foggy, this means that water entered
into the body. In such case call a qualified technician to ser
-
vice it or contact the dealer.
• Do NOT clean the prism with thinner / abbrasives, because
this will remove the special coating of the prism and damage
the instrument.
• Store only in dry and cool environment.
Making Measurement:
1.
Open the light plate & place 2 to 3 drops of the test liquid on the prism.
2.
Close the Light Plate. Ensure the water is spread across the entire surface of
the Prism. There must not be any bubbles or dry spots.
3.
Wait for about 30 seconds, this is to allow the temperature compensation to
take place.
4.
Hold the meter in the direction of light source and look into the Eyepiece.
5.
Select the scale, which is the intended unit of measurement.
6.
Take the reading from the scale on the line where the blue and white area
meets.
7.
Wipe dry the Light Plate and Prism with a soft lint-free clothe after each and
every test and before storing away.
8.
It is important to maintain the Light Plate and Prism dust and stain free in order
to have good repeatability measurement.
Precautions in Usage:
1.
Clean the instrument between each measurement and before storage with a
soft cloth. Residue of samples stained on the prism could damage the coating
on the prism.
2.
Do not measure with abrasive or corrosive chemicals. This will damage the
prism’s coating.
3.
Do not immerse the instrument in water. If the view inside the Eyepiece
becomes foggy, water has entered into the body. Call a qualified service
technician or contact your dealer.
4.
Do not clean the prism with thinner as this will remove the special coating on
the prism and damage the unit.
5.
Do not store the instrument in a damp environment. Store only in a cool and
dry environment.
6.
This is an optical instrument and requires careful handling and storage. With
care, this instrument will provide years of reliable service.
Making Measurement:
1.
Open the light plate & place 2 to 3 drops of the test liquid on the prism.
2.
Close the Light Plate. Ensure the water is spread across the entire surface of
the Prism. There must not be any bubbles or dry spots.
3.
Wait for about 30 seconds, this is to allow the temperature compensation to
take place.
4.
Hold the meter in the direction of light source and look into the Eyepiece.
5.
Select the scale, which is the intended unit of measurement.
6.
Take the reading from the scale on the line where the blue and white area
meets.
7.
Wipe dry the Light Plate and Prism with a soft lint-free clothe after each and
every test and before storing away.
8.
It is important to maintain the Light Plate and Prism dust and stain free in order
to have good repeatability measurement.
Precautions in Usage:
1.
Clean the instrument between each measurement and before storage with a
soft cloth. Residue of samples stained on the prism could damage the coating
on the prism.
2.
Do not measure with abrasive or corrosive chemicals. This will damage the
prism’s coating.
3.
Do not immerse the instrument in water. If the view inside the Eyepiece
becomes foggy, water has entered into the body. Call a qualified service
technician or contact your dealer.
4.
Do not clean the prism with thinner as this will remove the special coating on
the prism and damage the unit.
5.
Do not store the instrument in a damp environment. Store only in a cool and
dry environment.
6.
This is an optical instrument and requires careful handling and storage. With
care, this instrument will provide years of reliable service.
Summary of Contents for 94235
Page 1: ...REFRACTOMETER 0 32 DEMA 94235...
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