General-tools-and-instruments DCFM8901 Manuel d'utilisateur télécharger pdf (Page 15)

We would suggest to set the free area

dimension before you start measuring

the air velocity so after you measure the

air velocity, you can jump to the air flow

mode to view the cubic feet per minute

without further changing the free area

dimension.

3

CFM (ft /min)

2

= Air Velocity (ft/min)xArea (ft )

3

CMM (m /min)

2

= Air Velocity (m/sec)xArea (m ) x 60

Cubic equations:

Units Conversion Table:

1 m/s=

1 ft/min=

1 knots=

1 km/hr=

1 mph=

m/s

1

0.00508

0.5144

0.2778

0.4464

ft/min

196.87

1

101.27

54.69

87.89

knots

1.944

0.00987

1

0.54

0.8679

1 m/s=

1 ft/min=

1 knots=

1 km/hr=

1 mph=

km/hr

3.6

0.01829

1.8519

1

1.6071

mph

2.24

0.01138

1.1523

0.6222

1

Note:

On initial start up the unit will display

pH, knots. (See Fig.15)

MIN

mil/h cfm

AVG

REC

FLOW

km/h cms

AREA

m/s

vel Hold PH Knots

ft/m

2

ft

2

m

MAX

Fig.15

14

1 2 ... 10 11 12 13 14 15 16 17 18 19

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