Hangzhou Chincan Trading Co., Ltd. RSD200 User manual

OPERATION MANUAL
RSD Refractometer
INTRODUCTION
Thank you for choosing our refractometer. This is an easy-to-use device, requiring little to no
training. Please read the manual before using to ensure optimal measurement.
The refractometer is designed for fast and accurate determination of fluid concentrations. The
instrument will automatically compensate for temperature fluctuation and can be used for years
of trouble-free service when properly and regularly maintained.
The refractometer represents reading relative to Brix scale. The Brix scale originated in the food
industry and is primarily a unit of measure corresponding to percent of sugar in a sugar and
water solution. The actual Brix value represents the number of grams of cane sugar in a 100
gram cane-sugar solution (percent sugar wt./wt.). This direct reading relationship holds true
only for sucrose solutions. When measuring non-sugar solutions, the Brix scale should be
thought of as an arbitrary scale. To make these arbitrary units of measure meaningful, they
must somehow be correlated to the concentration on the solution you are testing. This is
accomplished by creating a chart of solution concentration relative to the Brix scale. A separate
must be made to each type of solution being tested.
LCD DISPLAY

KEYS (BUTTONS)
i) Turn on meter; or
ii) Turn off meter after pressing for 3 seconds.
i) Zero calibration; or
ii) Press for 2 seconds to toggle between ℃ and ℉.
i) Press the button to read after drop samples; or
ii) Press for 2 seconds to toggle between measured
items.
Reset to factory setting.
SPECIFICATIONS
1. Temperature measurement range: 0℃-40℃ (32℉ -104℉)
Measurement range: Please see table on the last page.
2. Precision of measurement temperature: ±0.5℃ (1℉)
3. Automatic temperature compensation: 5℃-40℃ (41℉ -104℉)
4. Minimum sample volume: 0.3ml.
5. Measuring response time: ≤3seconds
6. Power supply: 2×AAA batteries
7. Battery life: ≥5000 readings
8. Dimension: 145×67×38mm( L x W x H)
9. Net Weight: 185grams
AUTO TEMPERATURE COMPENSATION (ATC)
Refractive index is very temperature-dependent. It is well known that substantially all materials
expand when heated (i.e. become less dense) and contract when cooled (i.e. become more
dense). The speed of light in a liquid increases as temperature increases, and refractive index,
therefore, decreases. Although this thermal effect is minor for solids, the change in density for
a liquid is substantial. ATC ensures that concentration readings of aqueous (water-based)
+

solutions will be accurate with respect to sample's temperature.
The refractometer is temperature compensated for aqueous (water-based) sucrose solutions
and can automatically compensate for temperature differences within the range of 5℃ ~40℃
(41℉ -104℉). The temperature of the sample, however, has little bearing on the accuracy of
the reading. In most cases, the sample almost immediately assumes the temperature of the
refractometer, the ambient temperature, and the fluid should be in equilibrium within the
instrument's temperature range.
CALIBRATION-ZERO SET
Please refer to the specification table for the calibration solution standard to different Brix range
(ex. RSD300, RSD400).
For the refractometer must be set zero before initial use and periodically thereafter. It is
recommended that calibration to be performed at least once a day as well as prior to performing
tests requiring the highest precision, or when moving between environments with extreme
changes in ambient temperature. A clean container of water is all that is needed to automatically
calibrate the instrument. Although tap water may be used, distilled or deionized water is
recommended. The water temperature for calibration should ideally near 20℃ (68℉).
1. Inspect the measuring surface to make sure it is clean and dry
2. Place a few drops of calibration liquids on the prism window
3. Press , start calibration
4. The refractometer show the process of zero setting (F 2.1)
5. If calibration is successful, it will show “Pass” (F2.2)
6. After calibration process is finished, the LCD will be returned to temperature mode. The
calibration result will be saved and will be the new zero point after the device is powered off
and on again.
Please note:
- The calibration liquids are different according to the measuring range.
- After calibration, please remember to clean the liquid from the prism surface and keep the
prism surface dry and clean to avoid erosion.
F
2.1
F
2.2

MEASUREMENT
1. Make sure the prism surface is clean and dry
2. Place a few drops of the sample on the prism
3. Press , “---” will be shown on the screen.
Test result(s) will be shown on the screen (F 3.1)
The result(s) will be stored in the device for up to 60 seconds.
Press the “Power” button to re-check the previous measurements.
4. After testing, please remember to clean and dry the surface when you are done.
Scale Selection
1. Hold for 2 seconds, the scale will change to the next
measurement type (F 4.1)
2. Repeat Step 1 until desired the scale is shown on the screen
3. The refractometer save last selected scale.
Temperature Selection
1. Hold for 2 seconds, the temperature unit will change between Celsius (℃) and
Fahrenheit (℉)
2. The refractometer will save last selected temperature unit.
Resetting
1. Press , the option of returning to
factory setting will be shown on the screen (F 5.1)
2. Press to confirm resetting, or press to cancel
F
3.1
F
5
.1
F 4.1

STATUS
1. Press to turn on the device
2. Press to turn off the device, LCD will show the process
3. To be energy efficient, the device enter into sleep mode after
standing by for more than 60 seconds
Press to wake up the device
4. The refractometer will turn off after 90 seconds of no operation.
TROUBLE SHOOTING
Zero setting error (F 7.1)
 Out of calibration (zero set) range.
Action:
- Make sure you are using the correct calibration
solution, refer to the specification table.
- Make sure there is sufficient amount of calibration liquid to
cover the prism surface.
Measurement Error
 Exceed the specified measurement range (F 7.2)
 Below the specified measurement range (F 7.3)
F
6
.1
F 7.2
F 7.3
F 7.1

 No liquid on the prism or not sufficient amount (F 7.4)
Temperature error
 Temperature exceed range (F 7.5)
Action: Check temperatures of sample liquid,
the device and the ambience.
 Temperature under range (F 7.6)
Action: Check temperatures of sample liquid,
the device and the ambience.
Battery Error
 Low battery indication (F 7.7)
Action: Replace with new batteries when the icon
is red. 2 AAA batteries the same brand are
recommended to be used.
F 7.4
F 7.5
F 7.6
F 7.7

MAINTENANCE
WARNING:
Fail to follow these precautions will void the warranty and may cause instrument damage or
inaccurate readings.
Please keep the measuring surface clean. It is extremely important to thoroughly clean the
measuring surface after each use with a wet, soft, clean cloth or paper or towel, dampened with
a mild liquid dish soap and water. This may prevent cross contamination between samples and
provide accurate subsequent reading. The use of solvents or petroleum-based cleaners is not
recommended.
Important Precautions:
1. To ensure the LCD displays properly, don't expose the instrument to an environment with
too low or too high of temperature or prolonged exposure of strong direct sunlight.
2. The instrument should be avoided from violent shock.
3. Do not disassemble or assemble the instrument or change the inner parts.
4. Calibration should be implemented strictly according to the instruction.
5. Be sure to clean the prism surface and window of stage before and after every
measurement.
6. To avoid that accuracy is affected by evaporation, be sure to implement measurement
immediately after dripping solution on window of stage.
7. It may cause wrong result if keep measuring under low voltage.
8. Do not use the instrument under the humid and corrosive environment.
9. During the measurement, please avoid strong light (such as sunlight, lamp etc.).
When storing the instrument for long periods of time, it is advisable to remove the batteries.
Use only AAA batteries. Pay close attention to battery polarity when inserting batteries.
Reversing the polarity can cause instrument damage.
PACKAGE
The package supplied with:
1) Refractometer
2) Soft and clean cloth
3) Hard carrying case
4) Operation manual
5) Batteries

WARRANTY
The meter is warranted to be free from defects in material and workmanship for a period of one
year from the date of purchase. This warranty covers normal operation and does not cover
battery, misuse, abuse, alteration, tampering, neglect, improper maintenance, or damage
resulting from leaking batteries. Proof of purchase is required for warranty repairs. Warranty is
void if the meter has been opened.
CERTIFIED
The meter conforms to the following standards:
IP65 waterproof
CE: LSC1511050420E
RoHS
 EN 55022/2010
 EN 55024/2010
(IEC61000-4-2: 1995, IEC61000-4-3:1995)
as described in the Test Report LCS1511050420E. (Date: 23 Nov, 2015 ) , the meter complies
with the essential protection requirements of Council Directive 89/336/EEC , 92/31/EEC on the
approximation of the laws of the Member States relating to electromagnetic compatibility.
RETURN AUTHORIZATION
Authorization must be obtained from the supplier before returning items for any reason.
When requiring a RA (Return Authorization), please include data regarding the defective reason,
the meters are to be returned along with good packing to prevent any damage in shipment and
insured against possible damage or loss.
MODEL SCALES RANG DIVISIONS ACCURACY
CALIBRATION
RSD200
Brix 0-45% 0.1 ±0.1
Deionized Water
Refractive index 1.3330-1.4098 0.0001 ±0.0003
RSD300
Brix 28-65% 0.1 ±0.2
29.6% Sucrose
Refractive index 1.3770-1.4535 0.0001 ±0.0003

RSD400
Brix 58-92% 0.1 ±0.2
60% Sucrose
Refractive index 1.4370-1.5233 0.0001 ±0.0003
RSD500
Brix
0-85% 0.1 ±0.5
Deionized Water
Refractive index 1.3330-1.5100 0.0001 ±0.0003
RSD501
Brix 0-95% 0.1 ±0.5
Deionized Water
Refractive index 1.3300-1.5400 0.0001 ±0.0003