doc: Minor updates to the micropeak docs

[fw/altos] / doc / micropeak.xsl

diff --git a/doc/micropeak.xsl b/doc/micropeak.xsl
index 2faef41c25c4e3218f458c7af51ce51b5aa6360b..284d0fb04a359ff11e7b3f865d9dee5b7f841f78 100644 (file)
--- a/doc/micropeak.xsl
+++ b/doc/micropeak.xsl
@@ -30,6 +30,13 @@
          Initial release with preliminary hardware.
        </revremark>
       </revision>
+      <revision>
+       <revnumber>1.0</revnumber>
+       <date>18 November 2012</date>
+       <revremark>
+         Updates for version 1.0 release.
+       </revremark>
+      </revision>
     </revhistory>
   </bookinfo>
   <acknowledgements>
@@ -70,7 +77,8 @@ NAR #88757, TRA #12200
          preparing a soft cushion of wadding inside a vented model payload
          bay. Wherever you mount it, make sure you protect the
          barometric sensor from corrosive ejection gasses as those
-         will damage the sensor.
+         will damage the sensor, and shield it from light as that can
+         cause incorrect sensor readings.
        </para>
       </listitem>
       <listitem>
@@ -83,15 +91,27 @@ NAR #88757, TRA #12200
          height is reported in decimeters, so the last digit will be
          tenths of a meter. For example, if MicroPeak reports 5 4 4
          3, then the maximum height of the last flight was 544.3m, or
-         1786 feet. After reporting the last flight, MicroPeak starts
-         waiting for launch. It will flash once every three seconds
-         in this mode.
+         1786 feet.
+       </para>
+      </listitem>
+      <listitem>
+       <para>
+         Finish preparing the rocket for flight. After the
+         previous flight data have been reported, MicroPeak waits for
+         30 seconds before starting to check for launch. This gives
+         you time to finish assembling the rocket. As those
+         activities might cause pressure changes inside the airframe,
+         MicroPeak might accidentally detect boost. If you need to do
+         anything to the airframe after the 30 second window passes,
+         make sure to be careful not to disturb the altimeter. The
+         LED will remain dark during the 30 second delay, but after
+         that, it will start blinking once every 3 seconds.
        </para>
       </listitem>
       <listitem>
        <para>
-         Fly the rocket. Once the rocket passes about 4m in height
-         (13 feet), the micro-controller will record the ground
+         Fly the rocket. Once the rocket passes about 10m in height
+         (32 feet), the micro-controller will record the ground
          pressure and track the pressure seen during the flight. In
          this mode, the LED flickers rapidly. When the rocket lands,
          and the pressure stabilizes, the micro-controller will record
@@ -103,8 +123,7 @@ NAR #88757, TRA #12200
       </listitem>
       <listitem>
        <para>
-         Recover the data. Turn MicroPeak off for a couple of seconds
-         (to discharge the capacitors) and then back on. MicroPeak
+         Recover the data. Turn MicroPeak off and then back on. MicroPeak
          will blink out the maximum height for the last flight. Turn
          MicroPeak back off to conserve battery power.
        </para>
@@ -129,14 +148,13 @@ NAR #88757, TRA #12200
       to keep conductive material from coming in contact with the exposed metal elements.
     </para>
     <para>
-      The barometric sensors used in MicroPeak is
-      sensitive to sunlight. Please consider this when
-      designing an installation, for example, in an air-frame with a
-      see-through plastic payload bay. 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 used in MicroPeak is sensitive to
+      sunlight. Please consider this when designing an
+      installation. 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.
     </para>
     <para>
       The barometric sensor sampling ports must be able to "breathe",
@@ -192,7 +210,7 @@ NAR #88757, TRA #12200
       <title>Lithium Battery</title>
       <para>
        The CR1025 battery used by MicroPeak holes 30mAh of power,
-       which is sufficient to run for over 15 hours. Because
+       which is sufficient to run for over 40 hours. Because
        MicroPeak powers down on landing, run time includes only time
        sitting on the launch pad or during flight.
       </para>