Extech Instruments 407119A Bedienungsanleitung PDF herunterladen (Seite 7)

Model 407119 Version 1.3 April 2004

Useful Equations and Conversions

Area equation for rectangular or square ducts

Area equation for circular ducts

Cubic equations

NOTE: Measurements made in inches

must be converted to feet or meters

before using the above formulae.

Unit of Measure Conversion Table

m/s ft/min knots km/h MPH

1 m/s 1 196.87 1.944 3.6 2.24

1 ft/min 0.00508 1 0.00987 0.01829 0.01138

1 knot 0.5144 101.27 1 1.8519 1.1523

1 km/h 0.2778 54.69 0.54 1 0.6222

1 MPH 0.4464 87.89 0.8679 1.6071 1

Width (W)

Height (H)

Area (A) = Width (W) x Height (H)

CFM (ft

/min) = Air Velocity (ft/min) x Area (ft

)

CMM (m

/min) = Air Velocity (m/sec) x Area (m

) x 60

Radius

Area (A) =

6 x r

Where

6 = 3.14 and r

= radius x

radius

1 2 3 4 5 6 7

Keine Kommentare

Extech Instruments 407119A Bedienungsanleitung Seite 7