Useful Equations
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Temperature Specifications
Temperature Range
o
C
0 to 50.0
o
F
32.0 to 122.0
Calculating the Area for rectangular or square ducts
Rectangle:
Area (A) = Height (b) x Width (a)
Area (A) =
Circle:
x r
Cubic equations
3
CFM (ft
/min) = Air Velocity (ft/min) x Area (ft
3
CMM (m
/min) = Air Velocity (m/sec) x Area (m
NOTE: Measurements made in inches must be converted to feet or meters.
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Resolution
o
C
0.1
o
F
0.1
2
2
= 3.14 and r
= radius x radius)
(Where
2
)
2
) x 60
15
Accuracy
±1.5
o
C
o
±3.0
F
HD350-en-GB_V3.4 2/19
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