Appendix; Conversion Table; Area Equations; Cubic Equations - Extech Instruments 407412 User Manual

Appendix

Conversion Table

to convert to
feet/minute cms/sec
feet/minute feet/sec
feet/minute kms/hr
feet/minute meters/min
feet/minute miles/hr
meters/sec feet/min
meters/sec feet/sec
meters/sec kilometers/hr
meters/sec kilometers/min 0.06
meters/sec miles/hr
meters/sec miles/min
kilometers/hr cms/sec
kilometers/hr feet/min
kilometers/hr feet/sec
kilometers/hr knots
kilometers/hr meters/min
kilometers/h miles/hr

Area Equations

Rectangular Duct
H
Area = W x H
Circular Duct
π R 2
Area = 2
(A=2x3.14xRxR)

Cubic equations

CFM (ft
3
CMM (m
multiply to convert
by
0.508 knots
0.01667 knots
0.01829 knots
0.3048 knots
0.01136 mph
196.8 mph
3.281 mph
3.6 mph
mph
2.237 mph
0.03728 mph
27.78 mph
54.68 mph
0.9113
0.5396
16.67
0.6214
W
R
3
/min) = Air Velocity (ft/min) x Area (ft
/min) = Air Velocity (m/sec) x Area (m
7 Model 407412
to multiply
by
feet/hr 6,080
kilometers/hr 1.8532
nautical miles/hr 1
statute miles/hr 1.151
cms/sec 44.7
feet/min 88
feet/min 88
feet/sec 1.467
kms/hr 1.609
kms/min 0.02682
knots 0.8648
meters/min 26.82
miles/min 0.1667
2
)
2
) x 60
May 2001 Rev. 1.6