36 VelociCalc
®
/VeloCalc
®
Pro Air Velocity Meter 9600 Series
The Percent Outside Air feature
offers the choice between using
Temperature or CO
2
for the Percent
Outside Air study if a probe that
supports either CO
2
or Temperature
is plugged in.
Three measurements are necessary
for Percent Outside Air calculations:
Outside Air, Supply Air, and
Return Air.
The measurements may be taken in
any order by using the navigation
keys and . The Percent
Outside Air calculation is displayed
once the final measurement is taken.
The VelociCalc
®
instrument is intended for indoor use only. Care
should be taken when taking Percent Outdoor Air measurements
so that the instrument is not exposed to rain, sleet, hail, snow, or
other inclement weather conditions as exposure to these elements
will void the factory warranty.
The instrument calculates heat flow
by making temperature, humidity, and
flow measurements upstream and
downstream of the coil in the duct.
The following steps are utilized to
make the heat flow measurement:
• Select Heat Flow under the
workflows menu.
Heat Flow will only be available
with probes that measure Velocity,
Temperature, and Humidity (964
and 966 probes).
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