TSI Incorporated VelociCalc 8345, Руководство по эксплуатации и обслуживанию

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10 Chapter 3
that includes an internal self-check. First, all
displayable items will appear for a few seconds. If
a problem is detected, the display will light ‘CAL’
to indicate that it should be returned for servicing
and calibration.
Measuring Velocity
Press the
VELOCITY
key to display velocity
measurements (the V
ELOCI
C
ALC
will automatically
start in velocity mode). The velocity will be
displayed in ft/min or m/s depending on the DIP
switch settings (refer to Appendix B). Place the
end of the probe in the location where you want to
make the measurement. Make sure the sensor
window is fully opened and the red orientation dot
is facing upstream.
Measuring Temperature
Press the TEMP key to display air temperature
readings. The V
ELOCI
C
ALC
will display
temperature readings in either degrees Celsius (°C)
or degrees Fahrenheit (°F), depending on the DIP
switch settings (refer to Appendix B). Allow about
30 seconds for the temperature reading to stabilize
after switching to temperature mode. This is
necessary because the velocity sensor is heated
during velocity mode, and some heat is conducted
down to the temperature sensor.