BGS technic 1824 Manual De Instrucciones página 5

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 temperature adjust on the
prism for approximately 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 circular field with graduations down the center (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 pictures shown here and shown in step 3. &
step 4. are only as reference, the right specific scale is listed the
product).
Step 3
Look into the eyepiece and turn the Calibration Screw until the
boundary between the upper blue field and the lower white field meet
exactly on the zero scale, such as shown in the image. That is the
end of the calibration process. Make sure the ambient room
temperature is correct for the solution you are using (20°C/68°F).
When working temperature of the room or environment (not the
sample) changes by more than 5°F, we recommend recalibrating to
maintain accuracy. If the instrument is equipped with Automatic
Temperature Compensation system, the ambient working
temperature of the room must be 20°C (60°F) whenever the
instrument is recalibrated. Once calibrated, shifts in ambient
temperature within the acceptable range (10°C-30°C) should not
effect accuracy.
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Tel.: 02196 720480
Fax.: 02196 7204820
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