FEATURES
WARNINGS & MAINTENANCE
• Refractometers is a field device for the measurement of an index of refraction.
• Used to calculate the composition of various automobile fluids.
• Measures DEF, Ethylene Glycol, Propylene Glycol, Battery Fluid, and Cleaning Fluids.
• Precision instrument features high-quality optics with ultra-smooth focusing
• ATC - Automatic Temperature Compensation
• Heavy duty lightweight aluminum construction, includes a protective storage case.
1. Accurate measurement depends on careful calibration. 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 you 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 t the optical components and its basic
structure. With care, this instrument will provide years of reliable service.
OPERATION
PARTS DIAGRAM
Main Prism
Assembly
Calibration
Screw
Focus
Adjustment
Eyepiece
Rubber Grip
Daylight
Plate
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 temperature adjust on the prism for approxi-
mately 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 shown here and shown in step 3 & step 4 are
only as reference the right specific scale is listed the product.)
POOR POOR
GOOD
1.070
1.060
1.050
1.040
1.030
1.020
1.010
1.000
100
90
80
70
60
50
40
30
20
10
0
d
20
20
%
0
1.070
1.060
1.050
1.040
1.030
1.020
1.010
1.000
100
90
80
70
60
50
40
30
20
10
0
d
20
20
%
0
Calibrate to “0”
Reading of Sample
As seen when looking
into the instrument
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 zero scale, such as shown in the
image. That is the end of the calibration process. Make sure the
ambient room temperature is correct for the solution you are
using (20° C/ 68° F). When working temperature of the room
or environment (not the sample) changes by more than 5 F, we
recommend recalibrating to maintain accuracy. 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 (10° C- 30° F) should not affect accuracy.
Step 4
Now place a few drops of the ample to be tested onto the main
prism, close the daylight plate and check reading. 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.
Light
Source
