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GB
Refractometer - Package EG 104
Antifreeze Determination of Solar Fluids
®
TYFOCOR
HTL and LS ready-to-use
General
This measuring instrument can quickly check the anti-
freeze protection of a solarfluid (only one drop of fluid is
necessary).
Calibrating Procedure
1. Open the illuminating plate, apply 1-2 drops of dis-
tilled water onto the prism surface and press the plate
onto the prism surface.
2. Turn the pointy end of the tester to the light and look
into the eyepiece. Adjust the eyepiece such that the
graduation appears in focus.
3. The borderline now appears in the field of vision,
which separates the light part from the dark part. By
turning the adjusting screw (with the assistance of a
screwdriver), turn the borderline such that it is con-
gruent with the lower most line.
4. After carrying out adjustment, carefully dry the prism
surface.
Measuring procedure
1. Apply 1-2 drops of the test liquid onto the prism sur-
face. Then press the illuminating plate onto the prism
surface.
Read off at the propylene glycol scale only. Read-off values for TYFOCOR
effective frost protection, as shown by the following tables:
®
TYFOCOR
HTL
Ready-to-use
[% v/v]
100
Unadmissible dilution by water
95
90
85
80
®
TYFOCOR
LS and TYFOCOR
user. The tables shown above are for information only.
Corresp.
Read Off
..˚C frost
protection
< - 55 ˚C
- 35 ˚C
- 45 ˚C
- 33 ˚C
- 39 ˚C
- 29 ˚ C
- 34 ˚C
- 25 ˚C
- 29 ˚C
- 23 ˚C
®
HTL are ready-to-fill formulations and must not be further diluted by the
2. Hold the pointy end against the light and turn the eye-
piece such that the borderline is visible. The border-
line shows the value for the measured medium.
Instructions for care for measuring
1. Apply the liquid to be tested such that it is spread out
over the entire prism surface. The borderline can not
be clearly seen if there is too little or too much fluid
2. After measuring, the liquid should be carefully re-
moved from the prism surface. An incorrect reading
can result from a poorly dried prism surface.
3. If the prism surface is contaminated by oil, grease or
similar, an accurate measurement is not possible,
since the sample will be repelled from the surface. In
such a case, the prism surface is to be wiped clean
with a spiritus rag and dried.
4. Avoid damaging the prism surface.
5. This refractometer is to be handled with care, since it
is a precision instrument.
6. Do not clean the refractometer under running water.
It is splashproof, but not waterproof.
®
LS and -HTL slightly deviate from the
®
TYFOCOR
LS
Ready-to-use
[% v/v]
100
Unadmissible dilution by water
95
90
85
80
2
Corresp.
Read Off
..˚C frost
protection
- 31 ˚C
- 28 ˚ C
- 28 ˚C
- 25 ˚ C
- 25 ˚C
- 23 ˚ C
- 22 ˚C
- 20 ˚ C
- 18 ˚C
- 18 ˚ C
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