MRC REF Series User manual

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-04.10
INSTRUCTION MANUAL FOR
Hand Held Refractometers
REF-Series

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-04.10
REF-108
Hand Held Brix Refractometer
The REF-108 developed for working with sugar related liquids (fruit juices, honey, soft drinks, wine) ,
help monitor and control sugar concentrations in foods and beverages. Whether users are checking the"
ripeness" of fruit in the field, verifying product quality after harvesting, or controlling concentrations
during processing and packaging, refractometers provide critical information to ensure product quality.
It is also commonly used for controlling the concentration of various industrial fluids (cutting lubricants
and flux rinsing compounds). Which model to chose is according to the concentration in the liquids and
the parameter of refractometer.
SERIES:
Style Model Range Min. Div Accuracy Remarks
Sugar Refractometer
REF-108 0-80Brix 0.5% Brix ±0.5% Without ATC
Parts Diagram:
1. daylight prism stand 2. refractive prism 3. refractive prism stand 4. adjustment screw 5. tube, secure
rubber grip 6. focus control 7. adjustment tube 8. eyepiece .eyecup
OPERATING INSTRUCTION:
Step 1
Open the cover plate ( 1), Clean the refraction prism (2) carefully with soft
flannelette, Be careful not to scrape the refraction prism surface.
Setp 2
Put some drops of solution on the refrection prism surface and then cover the
cover plate ( 1) slowly so as to let the solution be all over the prism surface.
Setp 3
Adjust the cover plate (1) against the light soure or bright place. Turn the visual
range ring (7) until the graduated lines can be seen clearly. The readings of
the demarcation line between brightness and darkness just indicate the sugar
content in the solution.
For modle REF 108 . We can choose the range 0- 50% or 50 - 80% by rotateing the
knob (6) .

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-04.10
Put several drops of distilled water on the surface of the refraction prism(2) .
Adjust the adjusting screw (4) until the demarcation line between brightness and
darkness is just on the graduated line 0%; Then proceed on the measurement of
the testing object, and the reading thus obtained is the correct one.
Another methods for obtain the exact value is consulte with the temperature
correction table, A temperature correction value must be added to (or subtract
from) the scale reading.
The Attached Temperature Correction Table for readings of sugar content measuring gage.
REF-107
Hand Held Refractometer
This model can be used for measuring the sugar content of cocentrated fruit - .juice, condensed milk,
liquid sugar and jam. It has a largest measurement range than any other model of Brix refractometer. It has
three scales: No.1, No.2 and No.3
Style Model Range Min. Div Accuracy Remarks
Sugar Refractometer
REF-107 0-90Brix 0.2% Brix ±0.2% Without ATC

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-04.10
1. Cover plate 2. Knob 3. Adjusting ring 4. Entrance light prism 5. Eyepiece
DESCRIPTION
Model REF-107 has three scale to cover the range of 0 to 90%, scale one is 0 to 42%, scale two is 42 to 71 %,
scale three is 71 to 90%. The wide range substances with unknown concentrations.
METHOD OF OPERATION
1. Aim the front end of the refractometer to the direction of bright light, and adjust the adjusting ring of diopter 5
until the reticle can be seen clearly.
2. Adjustment of null
The null of this instrument has been adjusted before it is out of factory.
3. Open the entrance light prism, clean the surface of prism by soft
cotton flannel, drop 1 - 2 drops of solution to be measured. Close the
entrance light prism, press it lightly, then read the corresponding scale
of light and dark boundary, the reading is the brix of measured solution.
4. If the light is not sufficient, you could rotate and adjust 1.
5. The model has three scales, you could get them by rotating 2.
6. When measure solution of high concentration, there would be chromatism in the
view, you could reduce it by rotating 3.
7. After measurement, clean away the adherend on the surface of prism and cover
plate by moist gauze.

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-04.10
REF-211/212
Hand Held Salinity Refractometer
REF-211/212 are designed for testing the concentration of salt water and brine. Its triple scale provides a
direct reading of the specific gravity and concentration ( Parts per Thousand) of salt in water and The RHS-1
0 proves itself valuable for agriculture, food processing and wildlife management. This instrument is
equipped with Automatic Compensation system making it ideal for field use. Which model is to be chosen
according to the concentration in the liquids and the parameter of refractometer.
Style Model Range Min. Div Accuracy Remarks
REF-211 0-10Brix 0.1% Brix ±0.1% With ATC
Salinity Refractometers
REF-212 0-28Brix 0.2% Brix ±0.2% With ATC
Parts Diagram:
Operation Steps:
Step 1.
Open daylight plate, and place 2-3 drops of distilled water on the main prism. Close
the daylight plate so the water spreads across the entire surface of the prism without
air bubbles or dry spots. Allow the sample to test on the prism for approximate. 30
seconds before going to step #2. (THIS ALLOWS THE SAMPLE TO ADJUST TO
THE AMBIENT TEMPERATURE OF THE REFRACTOMETER.)
Step2.
Hold daylight plate in the direction of a light source and look into the eyepiece.
You will see a circular field with graduations down the center (you may have to
focus the eyepiece to clearly see the graduations). The upper portion ofthe field
should be blue, while the lower portion should the white. (The pictures showed here
and showed in step 3. & step 4. are only as reference, The right specific scale is
listed in the product.)

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-04.10
Step 3.
Using distilled water as a sample, look into the eyepiece and turn the Calibration
Screw until the boundary between the upper blue field and the lower white field
meet exactly on the zero scale, such as showed in the picture. That is the end of
calibration. Make sure ambient room temperature is correct for the solution you
are using (20°C for our solution that is 68 OF). When working temperature ofthe
room or environment (not the sample) changes by more than 5 of , we
recommend recalibrating to maintain accuracy and reproducibility.
If the instrument is equipped with Automatic Temperature Compensation system,
the ambient working temperature of the room must be 20°C (68 OF) whenever the
instrument is recalibrated. Once calibrated, shifts in ambient temperature within the
acceptable range (10°C -30
o
e ) should not affect accuracy.
Step 4.
Do step 1. using the specimen of liquids which will be measured as the substitution
of distilled water. Then do step 2 and step 3. When do step 3again, you can take the
reading where the boundary line of blue and white cross the graduated scale. The
scale will provide a direct reading of the concentration
REF-105/115/116
Hand Held Sugar Refractometer
These Models are designed for measuring the solution with high sugar concentration or high Refractive Index.
Style Model Range Min. Div Accuracy Remarks
REF-105 45-82Brix 0.5% Brix ±0.5% With ATC
REF-116 58-90Brix
38-43Be'
12-27%Water
0.5% Brix
0.5Be'
1% Water
±0.5%
±0.5Be'
±1% Water With ATC
Sugar Refractometers
REF-115 0-55% Brix 1% Brix ±1% Without ATC
Parts Diagram:

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-04.10
Operation Steps:
Step 1.
Open daylight plate, and place 2-3 drops of distilled water on the main prism.
Close the daylight plate so the water spreads across the entire surface of the
prism without air bubbles or dry spots. Allow the sample to test on the prism
for approximate. 30 seconds before going to step #2. (THIS ALLOWS THE
SAMPLE TO ADJUST TO THE AMBIENT TEMPERATURE OF THE
REFRACTOMETER.)
Step 2.
Hold daylight plate in the direction of a light source and look into the eyepiece.
You will see a circular field with graduations down the center (you may have to
focus the eyepiece to clearly see the graduations). The upper portion of the field
should be blue, while the lower portion should be white. (The pictures showed
here and showed in step 3 and step 4 are only as reference. The right specific
scale is listed in the product. )
Step 3.
Look into the eyepiece and turn the calibration screw until the boundary
between the upper blue field and the lower white field meet exactly on the
standard scale. Please see the standard datas as list on the right. (The
instrument has been calibrated, if the instrument is with ATC, we recommend
to delete the calibration. )
Step 4.
Do step 1. Using the specimen of liquids which will be measured as the
substitution of standard solution. Then do step 2. And step 3.. When do step 3
again, you can take the reading where the boundary line of blue and white cross
the graduated scale. They will provide a direct reading of the Brix concen-
tretion.
Model Standard data
REF-105 Brix 78.78
REF-116 Brix 78.78
REF-312
Hand Held Clinical Refractometer
REF-312 is designed for clinical usage and intended for both Veterinary and Human Being. This unit provides
veterinarians and Human Being with quick and accurate indication of vital.fluids levels. Its Triple scale reads urine
specific gravity total serum protein and refractive index. Which model to chose is according to the concentration in
the liquids and the parameter of refractometer.

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-04.10
Style Model Range Min. Div Accuracy Remarks
Clinical Refractometer REF-312 0-12g/dl
1.000-1.050sg
1.330-1.360RI
0.2g/dl
0.005sg
0.0005RI
±0.2g/dl
±0.005sg
±0.0005RI With ATC
Parts Diagram:
Operation Steps:
Step 1.
Open daylight plate. and place 2-.~ drops of distilled water on the main prism.
Close the daylight plate so the water spreads across the entire surface of the prism
without air bubbles or dry spots. Allow the sample to test on the prism for
approximately 30 seconds before going to step #2. (THIS ALLOWS THE
SAMPLE TO ADJUST TO THE AMBIENT TEMPERATURE OF THE
REFRACTOMETER.)
Step 2.
Hold daylight plate in the direction of a light source and look into the eyepiece.
You will see a circular field with graduations down the center (you may have to
focus the eyepiece to clearly see the graduations). The upper portion of the field
should be blue. while the lower portion should be white.(The pictures showed here
and showed in step 3.& step 4 are only as reference.The right specific scale is
listed in the product.)
Step 3.
Using distilled water as a sample, look into the eyepiece and turn the Calibration
Screw until the boundary between the upper blue field and the lower white field
meet exactly on the zero scale, such as showed in the picture. That is the end of
calibration. Make sure ambient room temperature is comect for the solution you are
using (20'C for our solution that is 68°F ).When working temperature of the room
or environment (not the sample) changes by more than 5 of, we recommend
recalibrating to maintain accuracy and reproducibility.
If the instrument is equipped with Automatic Temperature Compensation system,
the ambient working temperature of the room must be 20'C (68°F) whenever the
instrument is recalibrated. Once calibrated, shifts in ambient temperature within the
acceptable range(lO'C-30'C)should not effect accuracy .

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-04.10
Step 4.
Do stepl. using the specimen of liquids which will be measured as the substitution
of distilled water. Then do step 2 and step 3. When do step 3again, you can take the
reading where the boundary line of blue and white cross the graduated scale. The
scale will provide a direct reading of the concentration.
REF-113/114
Hand Held Brix Refractometer
REF-113/114 are developed for working with sugar related liquids (fruit juices, honey, soft drinks, wine), help
monitor and control sugar concentrations in foods and beverages. Whether users are checking the" ripeness" of fruit
in the field, verifying product quality after harvesting, or controlling concentrations during processing and
packaging, refractometers provide critical information to ensure product quality. It is also commonly used for
controlling the concentration of various industrial fluids (cutting lubricants and flux rinsing compounds). Which
model is to be chosen according to the concentration in the liquids and the parameter of refractometer.
Style Model Range Min. Div Accuracy Remarks
REF-113 0-32% Brix 0.2% Brix ±0.2% With ATC
Brix Refractometer REF-114 28-62% Brix 0.2% Brix ±0.2% With ATC
Parts Diagram:
Operation Steps:
Step 1.
Open daylight plate. and place 2-.~ drops of distilled water on the main prism.
Close the daylight plate so the water spreads across the entire surface of the
prism without air bubbles or dry spots. Allow the sample to test on the prism
for approximately 30 seconds before going to step #2. (THIS ALLOWS THE
SAMPLE TO ADJUST TO THE AMBIENT TEMPERATURE OF THE
REFRACTOMETER.)

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-04.10
Step 2.
Hold daylight plate in the direction of a light source and look into the eyepiece.
You will see a circular field with graduations down the center (you may have
to focus the eyepiece to clearly see the graduations). The upper portion of the
field should be blue, while the lower portion should be white.(The pictures
showed here and showed in step 3.& step 4 are only as reference, The right
specific scale is listed in the product.)
Step 3.
Using distilled water or calibration liquid as a sample, look into the eyepiece
and turn the Calibration Screw until the boundary between the upper blue field
and the lower white field meet exactly on the zero scale, such as showed in the
picture. That is the end of calibration. Make sure ambient room temperature is
correct for the solution you are using (20
0
for our solution that is
68
0
F). When working temperature of the room or the environment (not the
sample) changes by more than 50 F, we recommend recalibrating to maintain
accuracy and reproducibility.
I f the instrument is equipped with Automatic Temperature Compensation
system, the ambient working temperature of the room must be 20%(68
°F)whenever the instrument is recalibrated. Once calibrated, shifts in ambient
temperature within the acceptable range (10
0
C-30° C) should not affect
accuracy.
Step 4.
Do step I. using the specimen of liquids which will be measured as the
substitution of distilled water or calibration solution. Then do step2 and step3.
When do step3 again, you can take the reading where the boundary line of blue
and white cross the graduated scale. The scale will provide a direct reading of
the Brix concentration.
Model Standard data
REF-114 Brix 29.6
Warning - Maintenance
l. Accurate measurement depends on careful calibration. Follow the instructions above
closely. Note: Shifts in ambient room temperature of the prism prior to measurement. The
prism and sample must be at the same temperature for accurate results.
2. Do not expose the instrument to damp working conditions, and do not immerse the
instrument in water. If the instrument becomes foggy, water has entered the body. Call a
qualified service technician or contact your dealer.
3. Do not measure abrasive or corrosive chemicals with this instrument. They can damage
the prism's'coating:--
4. Clean the instrument between each measurement using a soft, damp cloth. Failure to
clean the prism on a regular basis will lead to inaccurate results and damage to the prism's
coating.
5. This is an optical instrument. It requires careful handling and storage. Failure to do so
can result in damage to the optical components and its basic structure. With care, this
instrument will provide years of reliable service.