Chapter 2: Unpacking and Setting Up
11
Connecting a Pitot Tube
When the micromanometer is connected to a pitot tube, air velocity or air volume measurements can be
taken. The pitot tube is connected to the (+) and (–) pressure ports on the micromanometer using two
pieces of tubing of equal length. The total pressure port of the probe connects to the (+) port on the meter,
and the static pressure port of the probe connects to the (–) port on the meter.
Total Pressure
Port (+)
Static Pressure
Port (
–)
Figure 8: Pitot Tube
Note
The pitot velocity needs a valid temperature to perform the standard or actual velocity correction. This
is accomplished in the ―Actual/Std Setup‖ menu. If no probe capable of measuring temperature (plug
in probe) is connected, the―Temp Source‖ must be set to ―Entered‖. The duct air temperature must
then be manually inputted by the user using the ―Entered Temp‖setting. If the ―Temp Source‖ is set to
Probe, and no probe is connected, dashes (------) will appear on the display.
For more information on entering the temperature manually, refer to the
Actual/Standard Setup
section of this manual.
C A U T I O N
Do
not
use the instrument or probes near hazardous voltage sources since
serious injury could result.
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