923
Users Manual
12
IR and RF Communication
When the Probe is connected the Product base, the two
communicate with infrared (IR) sensors. When the Probe is used
away from the base in wireless mode, the Probe uses radio
frequency (RF) to communicate with the base. If unable to
communicate in RF mode, turn the Product off, connect the Probe
to the base, and push to turn the Product on.
Air Velocity and Flow
The Product measures actual air velocity and volume flow rate to
find the overall velocity indication.
Measure Velocity
Note
To measure velocity, a barometric pressure reading is
necessary. The barometric pressure on the Product
defaults to sea level but can be adjusted. If you use the
default but are not at sea level, you will still get a velocity
reading, but there may be a slight error due to the
incorrect barometric pressure.
To measure velocity, first enter the barometric pressure:
1. Push and to access the Set Barometric function.
2. Push and to record the barometric pressure.
3. Push .
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