Temperature Key; Humidity Key (Model 8386/8386A Only); Thermal/Pitot Key (Models 8385/8385A/8386/8386A Only); Actual/Standard Key - TSI Instruments VelociCalc Plus 8384 Operation And Service Manual

TEMPERATURE Key

Press and release to display temperature on the large digits instead of
showing it on the small digits. Temperature is usually displayed on the
small digits when other measurement types are on the large digits.

HUMIDITY Key (Model 8386/8386A Only)

Press to toggle between displaying % relative humidity, dew point
temperature, and wet bulb temperature on the large digits. (The first time
that the button is pushed it will display the last measurement type that was
displayed.) NOTE: To display accurate wet bulb temperature, the correct
barometric pressure must be entered. See Actual/Standard Key section for
details on setting the barometric pressure.

THERMAL/PITOT Key (Models 8385/8385A/8386/8386A Only)

Press to toggle back and forth between measuring velocity or flow rate with
the thermal anemometer sensor or with a Pitot tube attached to the pressure
ports. NOTE: If this key is pressed while displaying anything other than
velocity or flowrate, it will have no effect on the readings.

ACTUAL/STANDARD Key

Press to toggle between displaying actual and standard velocity or flow rate.
Press and hold to view, enter, or change ambient conditions. Ambient
conditions are used for wet bulb temperature calculations and for Pitot tube
measurements. When the key is pressed and held, the pressure units will
flash and the last barometric pressure entered will be displayed. Use the
keys to change the barometric pressure and press ENTER to accept it.
Then the temperature units will flash and the last temperature entered will
keys to change the temperature and press ENTER
be displayed. Use the
to accept it and return to measuring mode. The ranges that can be entered
are as follows: Pressure: 15 to 40 in. Hg (381 to 1016 mm Hg), 29.92 in. Hg
(760 mm Hg) is default; Temperature: -80 to 400°F (-62 to 204°C), 70°F
(21.1°C) is default. For a more detailed explanation of the differences
between actual and standard velocity or flow rate, please contact TSI for a
copy of Application Note TI-109.

SAMPLE INTERVAL Key

The SAMPLE INTERVAL key is used to set the time constant and logging
intervals. Press to display current time constant. Use to scroll through
the time constant choices, which are 1 s, 2 s, 5 s, 10 s, 15 s, 20 s, and LOG
symbol, then press ENTER to accept the choice. If LOG was chosen, the
first logging interval choice will be displayed. Use to scroll through
the logging interval choices, which are 2 s, 5 s, 10 s, 15 s, 20 s, 30 s, 1 min,
2 min, 5 min, 10 min, 15 min, 20 min, 30 min, 60 min, and OFF. Press
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