HC Cargo 210771 Manual De Instrucciones página 3

GB
RefRaCtometeR
The refractometer is designed to test the
concentration of the battery fluids, antifreeze
liquid and cleaning fluids. With the indication
of the percentage you may know at which
temperature the fluid will be frozen for
both propylene glycol and ethylene glycol. It
can also be used for checking the strength of
electrolyte solution batteries.
Calibration
Step 1:
Open daylight plate, and place 2-3 drops of
distilled water on the main prism. Close the
daylight plate so the water spreads across the
entire surface of the prism without air bubbles or
dry spots. Allow the sample to test on the prism
for approx. 30 seconds before going to step 2.
This allows the sample to adjust to the ambient
temperature of the refractometer.
Step 2:
Hold daylight plate in the direction of a light
source and look into the eyepiece. You will see
a field with graduations down to zero (you may
have to focus the eyepiece to clearly see the
graduations). The upper portion of the field
should be blue, while the lower portion should
be white. The intersection between the blue and
white line provide a direct reading.
Step 3:
Using distilled water or calibration liquid as a
sample, look into the eyepiece and turn the
calibration screw until the boundary between
the upper blue field and lower white field meet
exactly on the zero scale. That is the end of
calibration. The ambient working temperature
of the room must be 20°C (68°F) whenever
the instrument is recalibrated. When working
temperature of the room or environment changes
by more than 5°F, we recommend recalibrating to
maintaine accuracy.
Warning - Use - Maintenance
1. Accurate measurement depends on careful
calibration. Follow the instructions above
closely.
NOTE: Shifts in ambient room 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.
3. Do not measure abrasive or corrosive
chemicals with this instrument. They can
damage the prism's coating.
4. 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.
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. With
care, this instrument will provide years of
reliable service.
The guarantee in the product will be repealed if
damage to the instrument is caused by one or
more of the above-mentioned Warning - Use -
Maintenance notes.
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210771
Vedpak 143_Version 3_181011