Before starting
1.
Remove battery compartment
screw and lid. Insert 9 volt
alkaline battery.
2. Make sure the unit is off before
attaching the probe. Align the
probe connector key to the
keyway in the unit and insert
the connector.
NOTE: The unit must be off before
replacing the battery.
Button functions
When you turn on the
unit, an “all functions”
display (fig. 1) will
appear on the LCD,
and then automatically
change to the air velocity/ tempera-
ture display (fig. 2). Turning off the
unit will erase any air velocity
(FPM) or flow volume (CFM)
readings. The unit will reset to 0000
velocity or flow volume. The “Free
Area” number (see below) will not
change from the four digit number
you’ve entered and saved.
Pressing this button changes the
display from air velocity (FPM) to
“Free Area”
number to flow
volume (CFM),
and back to
velocity (FPM).
Air velocity is the
speed of air
movement in
FPM (ft/m) or
MPS (m/s). Air
flow is the volume of air in CFM
(ft³) or CMS (cm³). “Free Area”
number is the open area in the duct
or grill in square feet. When measur-
ing through a diffuser you must
subtract the amount of diffuser
blockage. The “Free Area” default is
1.111 (ft²) which is equivalent to a
10” x 16” duct. You can change this
number (see page 5) to different
dimensions if necessary.
This button provides
several functions:
Freezes a reading in
the LCD.
Stores readings for minimum,
maximum, and minimum/
maximum averages for FPM.
Increases the numerical value of
each individual digit in the “Free
Area” number. For example,
pressing the button will change the
number from 1.111 to 2.111;
pressing again, 3.111. Each digit
can be increased up to 9 before
returning to “0.” To increase the
value of the second or other digit,
use the Record Single Point button
(see below) to select the digit you
want to change.
Changes Baud Rate for RS-232
output.
This button provides
several functions:
Displays continuous moving
average in FPM.
Displays average, minimum, and
maximum FPM readings for singe
and multipoint measurements.
Saves changes made to “Free Area”
number, imperial to metric switch-
ing, and Baud Rate.
ON/OFF
RESET
vel FLOW AREA Hold Ph Knots
8.8.8.8
ft/m ft²
m/s m²
mil/h clm
km/h cms
-1.8.8.8.
°C
°F
MIN REC
MAX AVG
vel
0000
ft/m
70.2
Fig. 1
Fig. 2
HOLD
ADVANCE
•
•
•
MIN/MAX-
RECORD
SINGLE POINT
MODE(SELECT)
• VEL (FPM)
• FREE AREA
• FLOW (CFM)
YELLOW JACKET
DIGITAL ANEMOMETER
ON/OFF
RESET
HOLD
ADVANCE
°F
MIN/MAX-
RECORD
SINGLE POINT
MODE(SELECT)
• VEL (FPM)
• FREE AREA
• FLOW (CFM)
NEXT DIGIT
→
MULTI-POINT
AVERAGE
•
•
•
•
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