Jolly logic ALTIMETERTWO User manual

ALTIMETERTWO
jolly logic
Complete ight analysis
for model rockets
64 g
EDITION

Welcome!
This is the third iteration of model rocketry’s most comprehensive
standalone ight analysis instrument, AltimeterTwo. For this version, we
increased the range of the accelerometer to 64 gees. Be aware that while
AltimeterTwo is now capable of measuring such massive acceleration, it
may not be able to survive every ight at the high end of this range. That’s
extreme acceleration!
This guide was designed to get you started. More complete information is
available online at www.jollylogic.com. You can also shop for accessories
and read stories about how others are using AltimeterTwo on our News
page.
We’d love to hear from you, as well.
Happy ying!
John Beans
Founder, Jolly Logic
Danville, California
[email protected]
Quick Start
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 A quick button click turns it on and off
 Hold the button to open the menu...
 ...and let go to choose an item
 Select Launch before each ight
 When you see Ready it’s ready to y!
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Attachment Point
Here is where you fasten
your altimeter to your model.
Be careful not to block the pressure
port opening underneath the
attachment point.
Push Button
• Quick press for ON/OFF
• Or hold the button to see more options.
Release the button when you see the option you want:
Clear and reset for next ight
Switch between displaying feet or meters
Enter special temporary “Current Altitude Mode”
Reboot and reset
Visual Tour
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Attachment Point
Here is where you fasten
your altimeter.
(Also, see Mounting Tips.)
Push Button
• Quick press for ON/OFF
• Hold the button to see more options.
Release the button when you see the option you want:
Begin next ight
Show last 500 ights, most recent rst
Switch between feet and meters
Erase all ights from memory
Leave menu, do nothing
Visual Tour
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Recharging Connector
Plugs into standard USB ports to recharge.
Push Button
• Quick press for ON/OFF
• Or hold the button to see more options.
Release the button when you see the option you want:
Clear and reset for next ight
Switch between displaying feet or meters
Enter special temporary “Current Altitude Mode”
Reboot and reset
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Display
Displays the peak altitude after each ight.
Be sure to clear it to “0” before each ight.
Altitudes higher than 9,999 feet are shown in thousands of feet , and are
indicated with a decimal point in the display.
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Recharging Connector
This is a USB Micro-B port. Plug the included
cable into standard USB ports to recharge.
See the Recharging section for more info.
Push Button
• Quick press for ON/OFF
• Hold the button to see more options.
Release the button when you see the option you want:
Begin next ight
Show last 500 ights, most recent rst
Switch between feet and meters
Erase all ights from memory
Leave menu, do nothing
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Display
Displays ight statistics after each ight,
and the current battery charge level.
Be sure to select Launch and
see “Ready” before each ight.
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Apogee
(Max Altitude)
Thrust Time
Peak Acceleration
Average Acceleration
Top Speed
Coast to Apogee Time
Apogee to Ejection Time
Ejection Altitude
Flight Data
Boost-Stage

.
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Peak Acceleration
Average Acceleration Flight Duration
Ejection Altitude
Descent Speed
Special Situations
• AltimeterTwo senses launch by sensing thrust (not altitude);
handle gently after selecting Launch to avoid “false launches”
and nonsense data.
• If ejection occurs BEFORE the apogee (max altitude), Apogee-
Ejection time will be negative.
• If ejection is very gentle, AltimeterTwo may not detect it. In that
case, ejection is assumed to take place at max altitude.
• AltimeterTwo is capable of measuring maximum accelerations
of up to 64 Gs. If the rocket exceeds the G-limit during motor
thrust phase the Top Speed, Peak Acceleration, and Average
Acceleration will be understated. They will be labeled with a “>”
sign in front of them.
G-limit overload detection will
notify you with a “>” marker that
a statistic may be below its actual
value.

Mounting Tips
Let It Breathe: Air Holes in Containers
AltimeterTwo uses an atmospheric pressure sensor to detect altitude, so
it needs to be exposed to outside air pressure. If you put it in a container,
or if your rocket payload compartment is airtight, be sure to add a few
holes to allow air to escape at altitude.
The larger the airspace is in your model, the larger the holes should be.
Remember: if your model can rapidly gain or lose altitude, your vent holes
need to allow air to rapidly enter and exit the enclosure.
Avoid Really Strong Airow
Airow near the nosecone of the rocket can create pressure waves that
can sometimes confuse AltimeterTwo and result in odd readings.
Specialized Mounting Accessories
Check the Jolly Logic website for mounting accessories such as the Snap
Mount. The Snap Mount can be taped, screwed, or attached with VelcroTM
to hold it in place. AltimeterTwo can then be quickly snapped in place.
If you mount your AltimeterTwo with your parachute, try to ensure that
the altimeter is protected from direct contact with ejection gases.
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Basic Flight Instructions
Before Each Flight
Press and hold the button to bring up the menu
Let go of the button when you see Launch
You should see Ready on the screen.
You are ready to y!
After Each Flight
 You will see each of the data items for the ight
 The ight has been stored; you can turn the altimeter off or
perform other activities safely.
Flight Logic
• AltimeterTwo senses launch by sensing acceleration. Try not to bump
or jostle it too much as you load it on the launch pad, or it will sense
a false launch and collect nonsense data. If you ever have a ight with a
very low altitude, it is probably because of rough handling just before
launch.
• AltimeterTwo will automatically turn off after 2 hours from the time
that the button was last pressed, or from launch.
• If you have a ight where Coast-Apogee and Apogee-Eject times
are roughly the negative of each other, this is because AltimeterTwo
mistook a rapid deceleration after burnout as ejection.
• For multi-stage ights, AltimeterTwo will report Thrust Time, Accel-
eration, and Top Speed based on the rst engine only. Coast to Apogee
time will begin after the rst engine burnout and include subsequent
stages. Apogee to Ejection Time and Ejection Altitude will not be
reliable. Max Altitude, Descent Rate, and Flight Duration will work as
usual.
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Recharging
Plug AltimeterTwo into any USB port to recharge. If you don’t see a light
when you plug it in, the USB port must not have power. Try another one.
Red Light
Your altimeter is charging correctly. Recharging
should be complete in less than 2 hours.
Green Light
Your altimeter is 100% charged.
Red + Green Light
Problem! Either this USB port is not providing
enough power, or your battery has a problem.
1. Try another USB port.
2. Open your altimeter and make sure the
battery connector is snapped in. See our
website for instructions on how to do this.
3. Contact [email protected].
Does It Hurt to Charge It All theTime?
Nope. In fact, Lithium Polymer batteries like the one in the AltimeterTwo
prefer to be charged all the time, and there’s no “memory effect” to worry
about. However, running down below zero charge will ruin them over time.
What Type of Connector Does AltimeterTwo Have?
The very common USB Micro-B

My results make no sense, what happened?
AltimeterTwo senses launch by sensing movement. If you bump it too hard
while loading it on the launch pad, it may detect a “false launch.” When
this happens the max altitude may be very low and other values may be
nonsense. Be gentle while loading, and verify the Ready status just prior to
launch.
It also requires at leaste 0.16 seconds of thrust, so some water rockets
may have issues detecting launch and working properly.
Why Does the Red Light Come On Every Time I Plug It In?
Even when it is 100% charged, the red light will come on when you rst plug
in AltimeterTwo while the recharging logic checks the status of the battery.
In just a few moments, it will turn green again. This is normal behavior.
Will the Battery Eventually Wear Out?
Well, yes, all batteries wear out. If your battery life drops below 4 hours, you
should consider replacing it. This is a unique battery; Jolly Logic is the only
place you can get a replacement. See our website for instructions.
More Info & Support
More info is available at www.jollylogic.com, including helpful videos,
tutorials, FAQs, and troubleshooting guides.
The plastic case, LCD display, and battery are user-replaceable. If you damage
your AltimeterTwo, please see www.jollylogic.com to order replacement
parts and to see repair instructions.
Have questions or suggestions? Contact us at [e-mail].
We’d love to hear from you, including your experiences with AltimeterTwo.
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Legal Notices
Copyright © Jolly Logic, LLC.
Velcro is a registered trademark of Velcro Industries B.V.

Jolly Logic, LLC
[email protected]
A PARTIRE DAI 14 ANNI
14 ANS ET PLUS
AB 14 JAHREN
FOR AGES 14 UP
A PARTIR DE 14 AÑOS
14+
ATTENZIONE!
AVERTISSEMENT!
WARNUNG!
WARNING!
ADVERTENCIA!
Rischio di so󰀨ocamento! Contiene piccole parti.
Non adatto a bambini di eta’ inferiore a 3 anni.
Risque de su󰀨ocation! Petite piéces. Ne
convient pas à un enfant de moins de 3 ans.
Erstickungsgefahr! Vershluckbare Kleinteile. Nicht
geeignet für Kinder unter 3 Jahren.
Choking Hazard! Small parts. Not for children under
3 years.
Peligro de asfixia! Contiene partes pequeñas.
Inadecuado para niños menores de 3 años.
• For rockets ONLY
• Measures peak altitude to
29,500 feet (9000 m)
• Also measures
Top speed
Engine thrust time
Acceleration (to 64 Gs)
Coast-to-apogee time
Apogee-to-ejection time
Parachute ejection altitude
Descent rate
Flight duration
• Stores 500 ights
• Rechargeable from any USB port
ALTIMETERTWO
jolly logic
Visit www.jollylogic.com
for complete information
jolly logic
ALTIMETERTWO