DEMA 94235, Руководство пользователя

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3. SERVICE
3.1. Setting the zero point
• Open the cover plate of the refractometer.
• Drop 1-3 drops of distilled water 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).
• The calibration should be made in room tem-
perature (around 20ºC and 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.
• Adjust the adjustment screw, to set the scale, so that the bor-
der line is exactly against 0.0%. For that purpose you must
remove the rubber cap on the screw and adjust it with the
trimming tool provided in the set.
Operation Manual for Hand-held Refractometer for
Brix measurement 28 to 62%
Product Layout
Specification:
Model: RBX2862
Measuring range: 28 ~62%
Display Resolution: 0.2%
Temperature Compensation: Automatic from 10 to 30degree Celsius.
(ATC model only)
Calibration:
1. Calibration should be made in an ambient environment of 20degree Celsius.
2. Open the Light Plate & place few drops of calibration fluid ½ fill the prism.
Model Calibration fluid Calibration Point
RBX2862 29.6% Sucrose Solution 29.6%
Alternative standards may be used.
3.
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 on the Prism, which is
cause by too little liquid use.
4. Wait for about 30 seconds, this is to allow the temperature compensation to
take place.
5. Hold the meter in the direction of light source and look into the Eyepiece.
6. Adjust the Focus Dial until image is clear and sharp. Each person has his own
focusing adjustment.
7. Remove the rubber cap on the Calibration knob, with the use of the provided
trimming tool and adjust it until the bottom line of the blue section is at 29.6%.
8. Calibration Completed.
9. Wipe dries the Light Plate and Prism with soft lint-free clothes before
proceeding with measurement.
Operation Manual for Hand-held Refractometer for
Brix measurement 28 to 62%
Product Layout
Specification:
Model: RBX2862
Measuring range: 28 ~62%
Display Resolution: 0.2%
Temperature Compensation: Automatic from 10 to 30degree Celsius.
(ATC model only)
Calibration:
1. Calibration should be made in an ambient environment of 20degree Celsius.
2. Open the Light Plate & place few drops of calibration fluid 1.2 fill the prism.
Model Calibration fluid Calibration Point
RBX2862 29.6% Sucrose Solution 29.6%
Alternative stanards may be used.
3.
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 on the Prism, which is
caused by too little liquid use.
4. Wait for about 30 seconds, this is to allow the temperature compensation to
take place.
5. Hold the meter in the direction of light source and look into the Eyepiece.
6. Adjust the Focus Dial until image is clear and sharp. Each person has his own
focusing adjustment.
7. Remove the rubber cap on the Calibration knob, with the use of the provided
trimming tool and adjust it until the bottom line of the blue section is at 29.6%.
8. Calibration Completed
9. Wipe dries the Light Plate and Prism with soft lint-free clothes before
proceeding with measurement.
Eyepiece
Calibration Knob
Focus Dial
Light Plate
Prism
Eyepiece
Calibration Knob
Focus Dial
Light Plate
Prism
Zero point