General WDCFM8912 User Manual page 6

Digital air flow meter with cfm, btu, temp, humidity, dp, fpm, mph, kph, mps, knots & wet bulb
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AIR VOLUME: OUTLET SIZE
While in normal
mode.
To measure the volume, the outlet size needs to be input first.
There are three choices to enter the size:
• Length & Width:
This is the default choice. Press M
digit first, then press L
(0-9). When selecting the value, the value will show from 0 to 9 in
cycle. After entering the length, short press
setting. Repeat the procedure of length setting, then short press
ENTER
again to finish the size setting and enter next step. (Fig. C)
• Diameter:
While in default outlet setting mode (length), press the
for over two seconds to choose the diameter setting. Press
M
to select the setting digit first, then press L
HOLD KEY
to select the appropriate value (0-9)
After selection, short press enter again to finish the size setting
and enter next step. (Fig. D)
• Area:
While in diameter setting mode, press the
seconds to enter the area setting.
Press M
HOLD KEY
key to select the appropriate value (0-9)
• After selection, short press
and enter next step. (Fig. E)
(Fig. D)
NOTE: Refer to page 9 for the range of each size input mode.
AIR VOLUME: MEASUREMENT
After short pressing
20 second waiting time for you to put the vane to the grill.
During the 20 second waiting time, the count down number
6
MODE
, long pressing
Mx/Mn
to select the setting digit first, then press L
ENTER
(Fig. C)
to finish and leave size setting, there are
ENTER
key to enter air volume
MODE
HOLD
key to select the setting
key to select the appropriate value
again to finish the size setting
(Fig. E)
to enter width
ENTER
ENTER
Mx/Mn
key for over two
ENTER
key
key
Mx/Mn

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