Sper scientific 300037 User manual

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PROGRAMMABLE
DIGITAL REFRACTOMETER
300037
INSTRUCTION MANUAL

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CONTENTS
INTRODUCTION ................................................................... 2
PANEL DESCRIPTION.......................................................... 3
FACEPLATE & LCD DISPLAY ...............................................3
OPERATING INSTRUCTIONS
General Measurement ..........................................................4
Calibration Procedures..........................................................4
Zero Checking...................................................................... 4
PARAMETER SETTINGS
Changing Temperature Scale............................................... 5
Automatic Temperature Compensation .................................5
Scale Selection .....................................................................5
High/Low Range Limit Alert...................................................5
ERRATIC READINGS ........................................................... 6
BATTERY REPLACEMENT .....................................................7
PRECAUTIONS........................................................................7
SPECIFICATIONS ................................................................. 8
WARRANTY ........................................................................... 8
INTRODUCTION
A Refractometer operates on the principle that, as the
concentration or density of a solution increases, its refractive
index changes proportionately. The larger the concentration of
dissolved substances in the solution, the higher the reading.
This high precision instrument is designed for laboratory
accuracy. The digital readout eliminates uncertainties, while
the water resistant design facilitates clean ups and protects
the electronics from moist environments. The large display
provides clear readout for measurements and the sample
temperature in addition to their other parameters.
Features include a wide measurement range, automatic
temperature compensation (ATC), °C/°F selectable scales,
high/low range limit alerts, auto shut-o󰀨 and a low battery
indicator. This Refractometer has built-in Brix% and
nD scales.
WARNING
Do not connect or disconnect the USB cable
while the Refractometer is turned on.

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PANEL DESCRIPTION
1. High/Low Range Limit Alert
2. READ and Enter
3. ZERO and ◄
4. SCALE and ▼
5. FUNC and Y/N
6. ON and OFF
FACEPLATE & LCD DISPLAY
1. Prism Temperature
2. ATC (active)
3. High Limit Alert
4. Low Limit Alert
5. Low Battery
6. Measurement Value
7. Calibration Error
8. Scale Indicator
9. Red LED
1 2 3 4 5 6 7 8 9 10
11 12
7. LCD
8. Prism plate
9. Prism
10. Cover
11. 9V DC Power Input
12. USB Data Port
3. FACEPLATE & LCD DISPLAY
1. Prism Temperature
2. ATC (active)
3. High Limit Alert
4. Low Limit Alert
5. Low Battery
6. Measurement Value
7. Calibration Error
8. Scale Indicator
9. Red LED
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7
8
9
nD
76.4°F ATC H-Limit L-Limit
-1.8.8.8.8%
▼
READ ZERO SCALES FUNC
ENTER ◄ ▼ Y/N
ON/OFF
1 2 3 4 5
Brix% nD (1
custom2scale3 )
Programmable
Refractometer

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OPERATING INSTRUCTIONS
General Measurement
•To avoid damage, it is important to clean the PRISM
WINDOW before and after each use.
•Press the ON/OFF button to turn the Refractometer ON.
The unit will automatically shut o󰀨 after about 3 minutes
of inactivity.
•Perform the Calibration Procedure (4B)
• With the unit on, ll the PRISM WINDOW with the
sample to be measured and then close the COVER.
•Press the READ button immediately to ensure accurate
readings. Delays may cause the sample to evaporate.
Calibration Procedure
•Clean the PRISM WINDOW before and after each use.
•Fill the PRISM WINDOW with a standard solution such as
distilled or deionized water. The ideal temperature of the
solution and the unit should be 65° ~ 72°F (18° ~ 22°C).
•Close the COVER.
•Press the ON/OFF button to turn the unit ON.
•Press the ZERO button for 3 seconds.
•When the procedure is complete, CAL will be displayed.
•To check the nD value, press the ZERO button once.
•This data can be viewed at any time to show the last
calibration value.
• A ashing crosshair symbol is displayed when the
calibration solution falls outside the accepted range.
Zero Checking
•Fill the prism window with distilled water solution that is
at the same temperature as the solution to be tested.
•Close the COVER
•With the unit on, press the ZERO button. A refractive
index reading between 1.3329 ~ 1.3331 indicates that
the unit accurately reads to the calibrated zero point.
• If the unit is out of range, a ashing crosshair symbol will
be displayed, indicating that recalibration is required.

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•Press any other button to exit this function.
•Perform Zero Checking if the unit has sustained a shock,
is subjected to temperature changes, or seems inaccurate.
PARAMETER SETTINGS
Changing the Temperature Scale
•With the unit on, press the FUNC button as needed until
t.P C (or F ) is displayed. Press the SCALE button to
view the temperature in Fahrenheit (or Celsius). Press
the READ button to exit.
Automatic Temperature Conversion
•This makes manual temperature correction
unnecessary, but to obtain precise readings the sample
and unit should be at similar ambient temperatures.
ATC appears on the LCD when this function is
activated. To set the ATC function, press the FUNC
button as needed until ALC.Y (or N) appears. Press the
SCALE button to toggle between on or o󰀨. Press the
READ button twice to exit.
Scale Selection
•Press the SCALE button to toggle though the scales.
The ▼ symbol indicates the active scale.
High/Low Range Limit Alert
Setting High Range Alert
•With the unit on, press the FUNC button as needed until
HL Y and the ashing H-Limit icon is displayed.
•Press the READ button and the last digit ashes.
•Use the q and the t buttons to set the high range limit.
•Press the READ button to activate the function.
•Press the FUNC button as needed to return to the
measurement screen.

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Deactivating High Range Alert
•Press the FUNC button as needed until HL n appears.
•Press the READ button and the last digit ashes.
•Press the FUNC button as needed to return to the
measurement screen.
Setting Low Range Alert
•With the unit on, press the FUNC button as needed until
LL Y and the ashing L-Limit icon appear.
•Press the READ button and the last digit ashes.
•Use the q and t buttons to set the low range limit.
•Press the READ button activate the function.
•Press the FUNC button as needed to return to the
measurement screen.
Deactivating Low Range Alert
•Press the FUNC button as needed until LL n appears.
•Press the READ button and the last digit ashes.
•Press the FUNC button as needed to return to the
measurement screen.
ERRATIC READINGS
A. If the readings are signicantly above or below the
expected results, consider the following:
B. Sample contains more than one dissolved solid.
For example: if the sample contains both salt and
sugar, a Brix Refractometer will not display the true
sugar content because the salt content will skew the
Brix measurement.
C. When diluting samples, be sure to use a pure solution
such as distilled water.
D. Sample contains suspended solids. Filter and
thoroughly mix the sample before testing.
E. Perform a calibration and check the zero point.
F. Replace the battery.

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G. Outside light can cause erratic readings, make sure
to close the COVER to the PRISM during measurement.
BATTERY REPLACEMENT
A. When the battery is low, the above symbol
appears on the LCD.
B. Open the back cover to replace the 9V battery.
C. Reinsert the back cover, making sure it is properly
seated. A built-in gasket protects the circuitry from spills.
PRECAUTIONS
A. Turn o󰀨 the unit before connecting the AC power adapter.
B. Protect the LCD from exposure to strong light sources.
C. Avoid prolonged use or storage in extreme temperatures.
D. Clean the prism and window surfaces before and
after use with a soft wet clean cloth or paper towel.
Other surfaces may be cleaned with a mild liquid dish
detergent and water.
E. Do not use in corrosive environments.
F. Do not submerge the unit.
G. This precision measuring instrument contains delicate
optics and electronics. Handle with care and do not drop.
H. To avoid electric shock, make sure the battery
compartment is covered and do not disassemble the unit.
SOFTWARE DOWNLOAD
With technology upgrading, some computers no longer
have a disc drive for you to install the software that
comes with your meter. You can download the software
that came with your meter directly.
Go to the www.sperdirect.com/software.htm and
nd your meter or search for you meter (300037) and
download from product page.

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WARRANTY
Sper Scientic 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 Scientic 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 www.sperwarranty.com within 10 days of purchase.
Rev 1/4/2016
SPECIFICATIONS
Type Range Res. Accuracy
Brix 0 to 95.0% 0.1% ±0.2%
nD 1.3330 to 1.5318 0.0001 ±0.001
Temperature 0 to 40°C 0.1°C ±1°C
-32 to 104°F 0.1°F ±2°F
Power Supply: 9V Battery (apx. 5000 tests/battery)
DC Input (AC Power Adapter)
Weight: 18 oz (500 g)
Dimensions: 7" x 4" x 2½" (180 x 100 x 65 mm)
Operating Temp: 41 to 95°F (5 to 35°C)
Storage Temp: 14 to 122°F (-10 to 50°C)
Included: Instructions,Carrying Case, 9V Battery, AC Power
Adapter, PC Software CD, USB Cable, Distilled
Water, and Transfer-Pipette.