Capacity: Measurement - General WDCFM8912 User Manual

Digital air flow meter with cfm, btu, temp, humidity, dp, fpm, mph, kph, mps, knots & wet bulb
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• Diameter:
While in default outlet setting mode (length), pressing
for over two seconds to choose diameter setting. Press M
to select the setting digit first, then press L
appropriate value (0-9)
(Fig. I)
• Area:
While in diameter setting mode, pressing
seconds to enter area setting. Press M
setting digit first, then press L
value (0-9)
After selection, short press
and enter next step. (Fig. L)
(Fig. K)

CAPACITY: MEASUREMENT

After short pressing
90 or 20 second (note 1) waiting time for you to put the vane to the
grill.
During above waiting time, the count down number displayed on
top-left corner and meter also beeps when time is up. (Fig. M)
If no need to wait for 90 or 20 seconds, just press
to start measuring the capacity right away.
Note 1: If you have many outlets to
measure, while you start to measure
the second one, the waiting time
will adjust to 20 sec automatically.
90 sec. is the buffer for sensor to
stable. No matter in inlet or outlet,
suggest to move the vane along the
grill to get accurate values.
After starting measuring the capacity, the meter will automatically
count the capacity for 60 seconds to give an average value. (Fig. N)
8
Mx/Mn
ENTER
to finish and leave size setting, there are
ENTER
Mx/Mn
(Fig. J)
ENTER
HOLD
key to select the
key to select the appropriate
again to finish the size setting
(Fig. L)
(Fig. M)
key
ENTER
HOLD
key to select the
key for over two
/
key
REC
START
key

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