Temperature; Ambient Temperatur (Amb Temp); Envelope Temperature Sensor (Tt34) - Flytec 3040 Operation Manual

A short press of the START key will start the elapsed time. A short press of the STOP key will
stop the elapsed time. Pressing the START key again will resume the elapsed time. This
function can be used to exclude stopovers so only actual flight time is measured.
Alternatively, a short press of the LAP key while the stopwatch is running will freeze the display
so that the elapsed time to that point may be read while the chronometer continues to run in the
background. Pressing the LAP key a second time switches the display back to the running
stopwatch.
Pressing the RESET key (when the stopwatch is stopped) will reset the stopwatch to zero and
will automatically switch the display back to real-time display.
7.

Temperature

7.1 Ambient temperature (AMB TEMP):
The 3040 has a temperature sensor inside its housing for the purpose of measuring the
temperature of the circuit board and the pressure sensor. This enables the measured altitude to
be properly compensated for changes in temperature. The measured temperature can be
shown in the lower display by short-pressing the ENV TEMP / AMB TEMP / CHRONO key so
that the indicator arrow is pointing to AMB TEMP.
Note: The internal temperature sensor measures the circuit board temperature and does not
directly measure the outside air temperature. The temperature inside the housing may be higher
or lower than the ambient air temperature when the instrument is moved rapidly from one air
mass to another (e.g., taking the instrument from heated/air-conditioned vehicle into outside
conditions, rapid ascents/descents, etc.). Additionally, the ambient temperature will read much
higher than actual if the 3040 is exposed to direct sunlight.
7.2

Envelope Temperature Sensor (TT34)

The 3040 will display envelope temperature if it is used with the TT34 wireless temperature
sensor. The TT34 is mounted to the top of the envelope and will transmit the measured
envelope temperature by radio frequency to the 3040. Each TT34 is coded with a unique ID
number (s/n) which can be entered into a 3040. When this is done the 3040 will receive
temperature only from the paired TT34. This feature allows many balloons equipped with Flytec
systems to fly near one another without
reading each other's envelope temperatures.
The TT34 is powered by a 9V battery
with an operation time of ~200 hours.
It is recommended that the battery
be tested at each annual inspection
and replaced at least every other
Annual Inspection. See Section 8 for
battery replacement.
The TT34 will automatically switch on when the envelope temperature is ~30ºF greater than
ambient, and it will automatically shut off ~45 minutes after the envelope temperature falls
below this threshold. When active, the TT34 transmits its data every four seconds.
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