Dwyer 8912 - Manual (Page 12)

CAPACITY: MEASUREMENT
After short pressing to finish and
leave size setting, there are 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. P)
CAP
WAIT
m/s
(Fig. P)
If no need to wait for 90 or 20 seconds,
just pressing key to start measuring
the capacity right away.
Note 1:
If you have many outlet 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
After starting measuring the capacity,
the meter will automatically count the
capacity for 60 seconds to give an
average value. (Fig. Q)
11
move the vane along the grill to get accuracy value.
cm
D
2 cm
AREA
(Fig. N) (Fig. O)
D
AREA
CAP CAP
During this 60 second time, the vane
should move along the whole outlet to
cover each area so the measured data
could be more accuracy. The count
down number displayed on the top- left
corner as a reminder and meter also
beeps when 60 sec is up.
After time is up, 60 seconds average
volume will display on the LCD as Fig R.