Download StratoLoggerCF

When you jerk the shop vac away, the apparent speed
suddenly goes negative instead of slowing gradually, and
apogee will not be detected until several seconds later. This
will never occur in a normal rocket flight profile.
Mounting Notes
Mounting hardware consisting of 4-40 threaded hex standoffs,
nuts, and screws such as the PerfectFlite MH44 can be used to
attach the altimeter to a mounting plate in your electronics
bay. To prevent contact with any of the components on the
altimeter’s PCB, make sure that the screw heads have a
maximum diameter of 0.219” (7/32”) and the hex standoffs
have a maximum dimension of 0.188” (3/16”) “across the
flats”. Be cautious when using garden-variety hardware from a
box store or other source, as they tend to supply bulkier parts.
Do NOT drill out the mounting holes in the PCB to
accommodate larger hardware.
The pressure sensor is mounted on the bottom of the board to
minimize the chance of sunlight or wind currents entering the
sensing hole. Make sure that at least 1/32” clearance is
provided between the mounting plate and the face of the
pressure sensor to allow for the proper pressure sensor
operation.
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