Sper Scientific 300055 User Manual

Page 1

8. WARRANTY

Sper Scientific warrants this product against defects in materials and workmanship for a period of 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, or damage resulting from accident, misuse, or abuse of the product. In order to obtain warranty service, ship the unit postage prepaid to:

SPER SCIENTIFIC

7720 E Redfield Rd, Suite 7

Scottsdale, AZ 85260

Include a description of the problem and your return address along with the returned item. Return your warranty card within 10 days of purchase or register online at:

email: [email protected]

www.sperscientific.com

POCKET DIGITAL

REFRACTOMETERS

300050 ~ 300055

INSTRUCTION MANUAL

rev 03/03/09

SPER SCIENTIFIC LTD.

- 12 -

Page 2

CONTENTS

1. Introduction.................................. 2

2. Panel Description ........................ 3-4

3. Notes and Precautions……………5

4. Calibration ................................... 5-6

5. Measurement .............................. 6-7

• Models with Multiple Scales..... 7-8

• Erratic Readings....................... 8-9

5. Zero Checking.............................. 9

6. Battery Replacement................... 9

7. Specifications .............................. 10-11

8. Warranty...................................... 12

1. INTRODUCTION

Our Pocket Digital Refractometers measure Brix, salinity or other parameters with laboratory accuracy. The digital readout eliminates uncertainties, while the water resistant design facilitates clean ups and protects the electronics from moisture.

Features:

• Automatic Temperature Compensation

• Zero Calibration

• Automatic shut off

• Instantaneous reading

Be’ 28~48

Model Scale Range Res. Accuracy

7. SPECIFICATIONS (continued)

Brix 40~95%

Water 10~45%

300050

0.1% ±0.2%

300051 Brix% 0~65%

300052 Brix% 40~95%

- 11 -

Salinity% 0~28%

300053 Brix% 0~95%

(14)~(-40)°F

Cleaner

Salinity ppt 0~280ppt 1ppt ±2ppt

300054

0.1°F ±2.0°F

(32)~(-50)°F

Ethylene Glycol

Propylene Glycol

300055

1.000~1.500sg 0.001sg ±0.005sg

Battery

Use pure distilled water as the calibration solution for all models.

Page 3

7. SPECIFICATIONS

Weight 5.3 oz, 150 grams

2. PANEL DESCRIPTION

Dimensions

Storage Environment

Operating Environment

Battery Life Approx. 8000 tests

Included

5" x 2 1/2" x 1 1/4" 120 x 65 x 30 mm

14~122°F (–10~50°C)

Below 90% RH Below 2000m sea level 32~104°F (0~40°C)

Protective Case

1.5V AAA Battery Distilled Water Transfer-Pipette

- 10 -

1. Stainless Steel Sample Plate

2. Cover

3. Prism

4. Keypad

5. Battery Compartment

- 3 -

Page 4

▼

Keypad for Single-Scale Models

10 9

ZERO READ

6. Display

7. Active Scale Indicator

8. SCALES button

9. READ button

10. ZERO button

- 4 -

make sure to close the COVER on the PRISM during measurement.

• After about 3000 tests, turn the unit off for 5

to 10 minutes to rest the battery.

6. ZERO CHECKING

Use this function to check the nD value of the zero setting for distilled water.

• Fill the PRISM (3) with a standard solution

of distilled water (0.0) that is the same temperature as the solution to be tested.

• Close the COVER (2).

• Press the READ (4) button to turn the

refractometer on and obtain a temperature

reading.

• Quickly press the ZERO (5) button

once.

• The nD value of the solution is displayed.

• This information can be viewed at any time

to show the last calibration value.

7. BATTERY REPLACEMENT

When the low-battery symbol is displayed,

push the tab to open the BATTERY COMPARTMENT (5) and replace the 1.5V

AAA battery with a fresh alkaline battery.

- 9 -

Page 5

(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.

Erratic Readings

If the readings are significantly above or below the expected results, consider the following:

• 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.

• When diluting samples, be sure to use a

pure solution such as distilled water.

• Sample contains suspended solids. Filter

and thoroughly mix the sample before testing.

• Perform a calibration.

• Replace the battery.

• Outside light can cause erratic readings,

- 8 -

3. 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.

• Do not drop or shake the unit.

• Use the protective carrying case to

prevent physical damage.

4. CALIBRATION

Calibration should be performed daily before sample testing begins or when you suspect that the reading may be inaccurate. For best results, perform the calibration in a controlled environment of 68°F (20°C).

- 5 -

Page 6

• Allow the refractometer and the distilled

water to acclimate to the ambient environment.

• Clean the PRISM (3) before and after

every use. There should be no spots or film on the prism.

• Drop at least 1.0 ml of distilled water (0.0)

onto the PRISM (3).

• Close the COVER (2).

• Press the READ (9) button to turn on the

refractometer.

• Press the ZERO (10) button for 3 seconds

to enter calibration mode.

• "CAL" flashes on the display. There will

be a red flash in the PRISM (3).

• The calibration is complete after "End" is

displayed.

5. MEASUREMENT

• Clean the SAMPLE PLATE (1) and

PRISM (3) before and after every use.

There should be no film or spots on the prism. If residue remains from a previous test, it will affect the accuracy of the unit.

• When the temperature difference between

the ambient temperature and the refractometer 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 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.

Models with Multiple Scales

• Follow the measurement instructions

- 6 -

- 7 -