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© 2011 Aqua-Hot
®
450-D Hydronic Heating System Owner’s Manual
Figure 1
Eyepiece
Calibration Screw
Daylight Plate
Assembly
Main Prism
Assembly
Calibrate the Refractometer
Aqua-Hot Part Number MSX-907-162
A
PPENDIX
D: M
EASURING
P
ROPYLENE
G
LYCOL
U
SING
A
R
EFRACTOMETER