Sper scientific 300068 User manual

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Alcohol
Refractometer
300068
Instruction Manual

2
CONTENTS
DESCRIPTION......................................................... 2
OPERATING PROCEDURES ................................... 3
PRECAUTIONS ....................................................... 4
SPECIFICATIONS ...................................................... 4
WARRANTY ............................................................ 4
DESCRIPTION

3
OPERATING PROCEDURE
1. With the COVER PLATE open, clean the PRISM with a
soft cloth to avoid scratching the surface.
2. Aim the refractometer toward a light source and rotate
the EYEPIECE to obtain the clearest focus.
3. Zero Point Calibration:
A. Open the COVER PLATE.
B. Apply a few drops of the included Distilled Water
onto the PRISM platform.
C. Close the COVER PLATE.
D. Turn the CALIBRATION SCREW until the dark and
light boundary line coincides with the bottom line
of the scale.
4. Carefully dry the prism platform and COVER PLATE.
5. Place a few drops of the test solution on the prism and
close the COVER PLATE so the solution spreads evenly
on the prism.
6. Aim the front of the refractometer towards the light
source and focus the eyepiece on the boundary line.
7. The boundary line indicates the v/v percentage of
alcohol in the test sample at 20°C.
8. After use, clean the prism with distilled water and a cloth
to remove any residue.
Note: The temperature of the zero point calibration
should be at the same temperature as the test solution.
For variations in temperature the zero point should be
adjusted once every 30 minutes.
Note: For beer or wine, this unit is to be used in conjunction
with a hydrometer before and after fermentation process.

PRECAUTIONS
Never submerge the unit, and do not let liquid seep into the
unit’s body. Clean the refractometer after each use with a soft
cotton cloth. Do not scratch surface of the prism. Store in a dry,
clean, and non-corrosive environment. Avoid strong impacts.
SPECIFICATIONS
Model 300068
Range 0-80% v/v
Resolution 0.5% v/v
Size
8 ¼” x 1 ½" (205mm x 40 mm)
Weight 8.1oz. (229 g.)
Accessories Screwdriver, Carrying Case,
Transfer Pipette, Manual.
WARRANTY
Sper Scientific warrants this product against defects in
materials and workmanship for a period of one (1) year from
the date of purchase, and agrees to repair or replace any
defective unit without charge. If your model has since been
discontinued, an equivalent Sper Scientific product will be
substituted if available. This warranty does not cover probes,
batteries, battery leakage, or damage resulting from accident,
tampering, misuse, or abuse of the product. Opening the
meter to expose its electronics will break the waterproof seal
and void the warranty. To obtain warranty service, ship the
unit postage prepaid to:
SPER SCIENTIFIC LTD.
8281 E. Evans Rd., Suite #103
Scottsdale, AZ 85260
[phone]
The defective unit must be accompanied by a description of
the problem and your return address. Register your product
online at https://www.sperwarranty.com/register within 10
days of purchase.
4 Rev 02/15/2022