Troubleshooting
Low battery icon visible on display or no display
Change the 9 volt battery in the meter.
E6 or continuous beeping
This signal indicates the probe is disconnected from the meter body or
is not properly connected.
Sensors fan will not turn
Purchase new sensor probe.
Battery Replacement
This meter requires a standard 9 volt batter for operating power.
Remove the screw from the lower back of the meter. Lift the panel out
and remove the battery. Reverse the process to install a new battery and
replace the cover.
Specifications
3. The meter will now display an average air flow reading and
the number of points measured (Fig 7).
The meter's free area dimension has been set to 1.111 square feet, a
commonly-used free area dimension in the U.S. If you want to measure
the air flow for a single point without changing the area dimension,
power the meter ON, position the fan, and then press the
MODE
key
twice. This will put you into air flow (CFM mode. The air flow (CFM)
display is equal to the current air velocity reading (FPM x FREE AREA =
CFM) times 1.111 square feet.
SUGGESTION:
Set the free area dimension before starting to measure
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 reading without
further changing the free area dimension.
Non Sleep Mode
To bypass the auto power off:
For continuous operation, press the
ON
and
HOLD
buttons at the same
time, then release ON only. An
"n"
will appear on the LCD. You can
then release the HOLD key. The meter will remain ON until the meter is
turned off.
Changing default settings
1. The default setting for the air velocity measuring unit is
"feet/minute"
. The default setting for the unit of
temperature is
"F"
. To change the measuring units to
"meters/sec"
and
"C"
.
a. Turn the meter ON by pressing the
ON
and
AVERAGE
keys at the same time. Release
ON
button first. The LCD
will display a small signal,
"ft/m"
, in the upper right
corner and an ˚F in the lower right corner. Then release
the
AVERAGE
key.
b. Press the
HOLD
key to change the measuring units to
the metric system. Press the
AVERAGE
hey to return to
the SAE/imperial measuring units.
c. Press the
RECORD
key. An
"S"
will show on the LCD.
Press the
HOLD
key to confirm and save the changed
value. At this time,
"2400"
appears on the LCD. Press
RECORD
. An
"S"
appears on the LCD. Press the
HOLD
key to confirm, and save the value.
Auto power off
The meter will turn off automatically after 20 minutes, to save the bat-
tery. This will be preceded by three (3) beeps.
(Fig 7)
Airflow:
Digital display (LCD):
Temperature:
Battery type:
Battery life:
Display type:
Display size:
Max reading:
Size (H x W x D)
Diameter of fan:
Auto power off:
125 - 4900 ft/min
0.7 - 25 m/sec
Counts - 4000
Updates 3 times/sec
-10˚ to +50˚C
1 4˚ to +122˚F
9 volt
100 hrs. typical (alkaline)
LCD
1 1/4" x 1 5/8"
(37 mm x 42 mm)
9999
7 1/8" x 2 3/4" x 1 3/8"
(181 mm x 71 mm x 38 mm)
2 7/8" (70 mm)
20 minutes bypass
Airflow
125 - 4900 ft./min.
0.7 - 25 m/sec
Temperature
-10 to 50˚C
+14 to 122˚F
Resolution
1
0.01
0.1
0.1
Accuracy
±2%
±2%
±0.6˚C
±1.0˚F
ACCURACY
DAFM2-MAN
P. 3
