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diff --git a/doc/handling.inc b/doc/handling.inc new file mode 100644 index 00000000..78d9133a --- /dev/null +++ b/doc/handling.inc @@ -0,0 +1,42 @@ +[appendix] +== Handling Precautions + + All Altus Metrum products are sophisticated electronic devices. + When handled gently and properly installed in an air-frame, they + will deliver impressive results. However, as with all electronic + devices, there are some precautions you must take. + + The Lithium Polymer rechargeable batteries have an + extraordinary power density. This is great because we can fly with + much less battery mass than if we used alkaline batteries or previous + generation rechargeable batteries... but if they are punctured + or their leads are allowed to short, they can and will release their + energy very rapidly! + Thus we recommend that you take some care when handling our batteries + and consider giving them some extra protection in your air-frame. We + often wrap them in suitable scraps of closed-cell packing foam before + strapping them down, for example. + + The barometric sensors used on all of our flight computers are + sensitive to sunlight. In normal mounting situations, the baro sensor + and all of the other surface mount components + are “down” towards whatever the underlying mounting surface is, so + this is not normally a problem. Please consider this when designing an + installation in an air-frame with a see-through plastic payload bay. It + is particularly important to + consider this with TeleMini v1.0, both because the baro sensor is on the + “top” of the board, and because many model rockets with payload bays + use clear plastic for the payload bay! Replacing these with an opaque + cardboard tube, painting them, or wrapping them with a layer of masking + tape are all reasonable approaches to keep the sensor out of direct + sunlight. + + The barometric sensor sampling port must be able to “breathe”, + both by not being covered by foam or tape or other materials that might + directly block the hole on the top of the sensor, and also by having a + suitable static vent to outside air. + + As with all other rocketry electronics, Altus Metrum altimeters must + be protected from exposure to corrosive motor exhaust and ejection + charge gasses. + |