User's Manual

AirMeter
TM
Test Tool
Taking Measurements
13
use  [UP] and  [DOWN] to change the CO
2
content reading to the desired number. Press 
[ENTER].
7. Once the outside air CO
2
content is entered, return
air, mixed air, and outside air CO
2
content are shown
in parts per million (ppm). Press  [Calculate] to
show the % outside air or press  [Back] to
change any of the measurements.
8. Press  [Done] to end the % outside air
measurement.
Air Velocity and Volume Flow Rate
Note
The optional Velocity Probe is required for
Velocity readings.
The Meter measures air velocity and volume flow rate to
determine the overall velocity reading. Standard and
Actual velocity readings are available.
Standard Velocity and Actual Velocity
Standard Velocity is the velocity that air moves if
temperature and pressure are compared to standard
conditions. Standard conditions for the Meter are 21.1 °C
(69.98 °F) and 101.4 kPa (29.93 in Hg).
Actual Velocity is standard velocity which is adjusted
using ambient barometric and temperature conditions.
Velocity Probe
When measuring velocity, the velocity probe must be
connected to the Meter. If the probe is not connected or it
fails the self test, the velocity feature is disabled. The
Meter alerts the user to either attach the probe or that
there is a probe error.
Note
The velocity probe takes approximately one
minute to warm up.
Measuring Air Velocity
Note
To measure standard or actual air velocity the
steps are the same with the exception of
entering the standard or actual velocity menu.
To measure velocity:
1. Attach the velocity probe.
2. Press
 to enter the velocity menu. The probe will
initialize.
3. Press  [Air Velocity].
4. Place the wand sensor perpendicular to the air
stream being measured.
Note
The white dot on the probe MUST face into the
air stream for accurate readings.