Aqua-Hot 450 D, Руководство пользователя

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© 2011 Aqua-Hot
®
450-D Hydronic Heating System Owner’s Manual
WA R N I N G !
Use extreme caution in gathering your antifreeze sample. When draining the Aqua-Hot heating system.
extremely hot liquid may be in the Boiler Tank and could cause personal injury.
NOTE: Refractometers may have more than one
scale. Make sure you are reading the scale
marked “Propylene” for measuring the anti-
freeze solution in the Aqua-Hot system.
Basic Operation
1. Open daylight plate, and place 2-
3 drops of the sample on the main
prism. Close the daylight plate so
the liquid sample spreads across the
entire surface of the prism without air
bubbles or dry spots. Allow the sam-
ple to rest 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). 2. Hold daylight plate in the direction of a
light source and look into the eyepiece.
You will see a circular field with gradua-
tions down the center (you may have to
focus the eyepiece to clearly see the
graduations). The upper portion of the
filed should be blue, while the lower por-
tion should be white. 3. Take the reading where the
boundary line of blue and white
cross the graduated scale. The
scale will provide a reading of the
freezing point of antifreeze solution
and the propylene glycol concentra-
tion. Clean the prism carefully using
a damp soft cloth. Do NOT immerse
in water.
Using the Refractometer to Test Antifreeze Sample
A
PPENDIX
D: M
EASURING
P
ROPYLENE
G
LYCOL
U
SING A
R
EFRACTOMETER