User Guide

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Battery/Coolant Refractometer
Introduction
Description
1. Prism
2. Cover plate
3. Adjustment Screw
4. Mirror tube
5. Eyepiece
6. Pipette
Field of View
Operation
The instrument measures the refractive index of the sample.
1. Zero Adjustment
Place one or two drops of distilled water on the prism.
Close the cover plate and rotate the adjusting screw so
that the light/dark boundary lines up with the “waterline”.
Once the zero adjustment has been completed, clean the
prism with soft cloth.
2. Sample Preparation and Reading
To take a sample reading, simply place a few drops of a
sample liquid on the measurement prism at the end of
the instrument. Lower the cover plate onto the sample
and prism. Open the prism cover and place 2 or 3 drops
on the prism. Close the cover so the liquid spreads
across the entire surface of the prism without air bubbles
or dry spots. Allow the sample to remain on the prism for
approximately 30 seconds.
While holding the instrument under a light source, look
through the
eyepiece. The
freezing point of the
liquid or the state of
the battery liquid is
determined by the
intersection of the
boundary of the light
and dark fields
(known as the
shadowline) on the
printed scale. If the scale appears out of focus, the
eyepiece may be adjusted by rotating the knurled portion.
The instrument also features an eye guard to prevent
stray light from entering the eyepiece and causing
reflections.
It may be necessary to adjust the position of the light
source to maximize the contrast of the shadowline. Under
normal conditions, optimal contrast is obtained by holding
the instrument underneath and perpendicular to a light
source.
Once a reading has been taken, wipe dry with a clean
cloth (do not wash or rinse) and place the instrum
ent in
the supplied case. Store the instrument in a safe, dry
environment.
Temperature is one of the single most important factors
influencing accurate refractometer readings and is one of
the largest sources of error in measurement.
Temperature compensation relieves the user of the
responsibility to measure temperature and apply a
correction factor when taking readings. This
refractometer makes this correction automatically. When
ambient temperature varies from 68°F (20°C), readings
are automatically adjusted to compensate for
temperature variance between 50°F to 86°F (10°C to
30°C).
Specifications
Note
Range -60 to 32°F for Propylene and
Ethylene glycol freeze point
1.15 to 1.30 specific gravity of battery acid
Resolution 5°F glycol freeze point
Accuracy
Size
Weight
0.01 specific gravity of battery acid
±2.5°F for Propylene and
Ethylene glycol freeze point
±0.01 for gravity of battery acid
40X40X158mm
about 84g
This manual is subject to change without notice.
Our company will not take the other responsibilities for any
loss.
The contents of this manual can not be used as the reason
to use the instrument for any special application.
DISPOSAL OF THIS ARTICLE
Dear Customer,
If you at some point intend to dispose of
this article, then please keep in mind that
many of its components consist of
valuable materials, which can be
recycled.
Please do not discharge it in the garbage
bin, but check with your local council for
recycling facilities in your area.
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Users Manual
Congratulations on the purchase of the battery/coolant
refractometer which features automatic temperature
compensation. This precision optical instrument should be
handled gently; avoid touching the optical surface. Careful use
of this instrument will provide years of reliable service.
2230F
V120514