UEi Test Instruments DAFM3 - Manual (Page 11)

Note: If when trying to advance from LW or D to AREA the “ENTER”
key is pressed it will accept the displayed value in advance to the
20-second countdown. If this is done in error turn the meter off and
start the process at the beginning.
Entering Area
Length/Width
After you decide if you will be using
LW (Length and Width for an open
square duct) D (Diameter for open
round duct), or AREA (Effective area
of a grill – Ak value) you will need to
enter the area. The procedure below
is for the LW entrance mode, but is
the same for all three methods.
To enter the volume mode, press and hold MODE until the unit beeps.
The previous screen will be appear.
This screen is used to enter length
(note small “L” in the lower left corner).
Changing Value Displayed:
One digit will be flashing. Change this
digit by pressing the Min/Max button
(the small triangle indicates increase
or up). When the digit is as desired,
press the lower right button (Next Dgt)
to move the flashing digit one position
left. You can repeatedly press this to
cycle through all of the digits if you
have incorrectly entered a value.
After the length is entered, press “Enter” briefly. This will accept the
value displayed, and move to the Width screen. The screen is very
similar to the length screen, but has a “W” in the lower left.
Enter the Width in the same manner as you entered the length using
the “Min/Max – Up” and “Next Dgt” buttons. When complete you will
press “Enter” briefly to accept this value.
The meter will now enter a 20 second
countdown, allowing you time to
position the air vane in front of the
opening to be measured. The screen
shown here will be displayed.
Note: If you wish to skip this wait
period, press the “Record/Start” key.
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