Sper Scientific 300056 Digital Refractometer Custom 1 Scale User Manual
Page 6
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4. MEASUREMENT
•
Clean the SAMPLE PLATE (1) and
PRISM (3) before and after every use.
•
When the temperature difference between
the ambient temperature and the refracto-
meter is greater than 10°F (5°C), place
the refractometer in the lab and allow it to
adjust to the ambient temperature. Allow
apx. 30 minutes for every 5°F (10°C)
difference in temperature.
•
Press the READ (9) button to turn the unit
on and display the temperature. This unit
features Automatic Temperature
Compensation (ATC) within the range of
41~104°F (5~40°C), eliminating the need
for manual temperature correction.
•
Perform a calibration (pg 6) before the
day's first use or after extended daily use.
•
Fill the PRISM (3) with about 1.0ml of the
sample solution.
•
Close the PRISM COVER (2).
•
Press the READ (9) button immediately to
obtain a reading. Delays may cause the
sample to evaporate.
•
Within 1 second, the value is displayed.
•
When the reading is under-range, the low
indicator (LLL) is displayed. The high
indicator (HHH) is displayed when the
reading is over-range.
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Models with Multiple Scales
•
Follow the measurement instructions
(page 6), then press the SCALES (8)
button and hold the button for 1 second to
cycle through the options.
•
"- - -" is displayed and the ACTIVE
SCALE (7) indicator "▼" points to the
selected scale.
•
With the desired scale selected, press the
READ (9) button to obtain the results.
Notes and Precautions
•
The refractometer will automatically shut
off after about 3 minutes of inactivity.
•
After each use, clean the SAMPLE
PLATE (1) and PRISM (3) with distilled
water on a soft cloth, and wipe dry.
•
If a film develops on the PRISM (3) it will
repel test samples and affect readings.
If this occurs, clean with a mild detergent.
•
The prism is easily scratched, never use
abrasive cleaning materials.
•
Never submerge.
•
Avoid spills around the unit.
•
Avoid prolonged use or storage in
extreme temperatures.
•
Do not use in corrosive environments.