Larsen & Brusgaard VISO User manual

LARSEN & BRUSGAARD
Mosevej 3
4070 Kirke Hyllinge, Denmark
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
VISO Manual

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WARNING!
FAILURE TO FOLLOW ALL WARNINGS, INSTRUCTIONS, AND REQUIRED PROCEDURES MAY
RESULT IN SERIOUS INJURY AND DEATH.
Always ensure your altimeter is adjusted to zero prior to jumping to account for any
changes in barometric pressure.
Altimeters may give erroneous readings if you are tumbling or the altimeter is in a
burble (wake), such as when sit flying or sky surfing. Chest mount altimeters are more
vulnerable to this problem. If you are in doubt about how this limitation affects your
skydiving, consult a licensed instructor.
DO NOT use this equipment unless you are on, or have passed an approved skydiving
course.
Use the VISO™ at your own risk.
VISO is a trademark of Larsen & Brusgaard, Denmark.
©2006. Larsen & Brusgaard ApS. All rights reserved.
Larsen & Brusgaard operates a policy of continuous development.
Therefore, we reserve the right to make changes and improvements to any of the
products described in this guide without prior notice.

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CONTENTS
Introduction ............................................................................................................................ 6
Software & functions .............................................................................................................. 7
Description .............................................................................................................................. 9
Display .................................................................................................................................... 10
Main Window ........................................................................................................................... 14
Alti-Meter Mode..................................................................................................................... 14
Speed-Meter Mode.................................................................................................................. 16
Road Map................................................................................................................................. 18
Customise the VISO Settings ..................................................................................................... 19
Alti-Meter / Speed-Meter Selector............................................................................................. 22
Feet/Meter Selector................................................................................................................ 23
Mph/Kmh Selector ................................................................................................................. 24
Altitude Offset....................................................................................................................... 25
Dive Type Selector.................................................................................................................. 26
True Airspeed (TAS) / Skydiver’s Airspeed (SAS) .......................................................................... 28
Set Current Year Selector ......................................................................................................... 32
Set Current Date Selector ........................................................................................................ 33
Set Current Time Selector ........................................................................................................ 34
Preset Jump Counter Selector................................................................................................... 35
Reset Jump Counter Selector ................................................................................................... 36
Turn VISO OFF Selector Selector................................................................................................ 37
Backlight Setup Area ................................................................................................................ 39
Backlight ON/OFF................................................................................................................... 39
Zeroing the VISO ...................................................................................................................... 41
Jump Mode .............................................................................................................................. 42
Jump Data ............................................................................................................................... 43
Logbook Area........................................................................................................................... 43
Jump Number........................................................................................................................ 44
Exit Altitude ......................................................................................................................... 45
Deployment Altitude............................................................................................................... 46
Freefall Time ......................................................................................................................... 47
Max. Speed in Freefall............................................................................................................. 48
Max. Speed under Canopy........................................................................................................ 49
Profile Area.............................................................................................................................. 51
Playback Altitude Versus Time .................................................................................................. 52
Playback Speed Versus Time..................................................................................................... 53
Resetting the VISO ................................................................................................................... 55
Battery Replacement ................................................................................................................ 56
Battery Status .......................................................................................................................... 57
Firmware Version...................................................................................................................... 58
Trouble-shooting ...................................................................................................................... 59
Appendix ................................................................................................................................. 60
TAS and SAS.......................................................................................................................... 60
SPECIFICATIONS........................................................................................................................ 63
Mechanical............................................................................................................................ 63
Logbook ............................................................................................................................... 63
Profile Storage....................................................................................................................... 64
Factory default settings .......................................................................................................... 64
Other ................................................................................................................................... 65
Accessories .............................................................................................................................. 66
Warranty.................................................................................................................................. 67

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Features
• Digital Alti-Meter or Speed-Meter
• Electroluminescent backlight for night jumping. Can remain ON for several hours
• Automatic calibration to local elevation
• LCD screen for easy and intuitive operation and information review
• Logbook with playback of altitude/speed profile for the last jump
• Operational at sub-zero temperatures
• Switches OFF automatically after 14 hours
Software & functions
• Stores up to 10 minutes of profile data from last jump
Displays Alti-Meter and Speed-Meter details from exit to landing
• Records and displays jump information about the last 200 jumps including exit
altitude, deployment altitude, freefall time, max. speed in freefall and max. speed
under canopy
• Choice of readings in feet or meter and mph or kmh
IntroductionIntroduction
Congratulations on purchasing your new VISO!
The VISO design is based upon the latest findings in microcomputer technology and
freefall parameters. Please read ALL of the instructions prior to actual skydiving use.
The VISO comprises three instruments:
1 Digital Alti-Meter
Stores detailed altitude information about the last jump for later review
2 Digital Speed-Meter
Stores detailed speed information about the last jump for later review
3 Jump Counter
Electronic logbook, storing and displaying information about the last 200 jumps.
- Can be used as an aid to track the amount of jumps performed on a rig.
- Can be reset at any time, but time and date for the last reset remains stored and
cannot be erased.

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1. UP button
2. Middle button
3. Down button
4. LCD display
5. Reset button (on side)
Description
If you have any questions please call, fax or e-mail us.
LARSEN & BRUSGAARD
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Introduction

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Display
2Time icon
3Additional information, displaying:
- current date/time
- time in profile when in Profile Area
- date/time when in Logbook Area
4Battery status
Battery Power Level icon – indicates the remaining battery capacity
Altitude / Speed Area
5Main information, displaying:
- altitude when VISO is set to Alti-Meter mode
- speed when VISO is set to Speed-Meter mode
- detailed profile information when in Profile Area
- logbook information when in Logbook Area
- various setup information
Display
The display has the following characteristics by default (normal usage):
Date / Time Area
1Date icon
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Date /
Time Area
Altitude /
Speed Area
Status Area
11 10 9 8 7

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Main Window
This represents the starting point for all further actions and subsequent displays.
Display
The VISO runs a self-test and
displays all icons
It then displays the firmware
version number together with
a factory reference number...
...and switches to a screen
configuration referred to as
the “Main Window”.
Display
Status Area
6True Airspeed (TAS) / Skydiver’s Airspeed (SAS) status
7Mph / Kmh status
8OFF icon - Used to manually power OFF the VISO
9Speed-Meter indicator when VISO is set to Speed-Meter mode
10 Padlock icon Used to indicate and control entrance to ACCESS mode
11 Feet/Meter status
12 Altimeter indicator when VISO is set to Alti-Meter mode
Power ON
The VISO has been powered OFF prior to shipping from our factory. To turn the
power ON, press and hold any key until the VISO beeps, then release the button.
Auto OFF
The VISO automatically switches OFF 14 hours after the last jump or 14 hours after
the last pressing of any key, whichever comes first.

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Alti-Meter Displays
In Alti-Meter mode the LCD may show 3 different displays, depending on what
altitude value is shown.
Main Window
If the altitude is below 1000 the altitude is displayed as
normal. Altitude resolution is in 10 feet (5 meter) incre-
ments.
If the altitude is 1000-9999, the altitude is displayed as
tens of feet or meter. Altitude resolution is in 10 feet
(10 meter) increments
Main Window
Explanation
The Main Window is the default window which displays current time, battery status
and either Altitude or Speed.
Alti-Meter Mode
When the VISO is set to Alti-Meter mode, the
“ALTI” and “Feet/Meter” icons are ON.
The VISO will display the altitude during climb, in
freefall and under canopy.
The date/time information switches OFF during
freefall and under canopy.
(When preset, press to view the current date).

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Speed-Meter Display during the freefall
Main Window
Speed resolution is in 1 Mph (1 Kmh) increments.
Important Notice about Speed Recordings
Experience has shown that when mounting the VISO on the hand or belly, different
air pressures induced by hand or body movements may result in incorrect recordings
of speeds.
Speed-Meter Mode
When the VISO is set to Speed-Meter mode, the “ALTI”,
“Feet/Meter”, “Mph/Kmh” and “TAS/SAS” icons are ON.
Note: The VISO will display the altitude during climb and
switch to Speed-Meter during the freefall and under canopy.
Date/Time area switches OFF during the freefall and under
canopy.
Main Window
If the altitude is 10000 or higher, the altitude is displayed as
hundreds of feet or meter. Altitude resolution is in 100 feet
(100 meter) increments.

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The VISO can be customised to your personal settings. Your settings will be stored
and recalled also after replacing batteries. When you first get the VISO, we recom-
mend you to go through the SETUP Selector to customise the VISO settings.
SETUP Selector
In the Setup Area the following options can be selected:
• Alti-Meter/Speed-Meter
• Feet/Meter when set to Alti-Meter
• Mph/Kmh when set to Speed-Meter
• Altitude offset
• Dive Type
• True Airspeed (TAS) / Skydiver’s Airspeed (SAS)
• Set current year
• Set current date
• Set current time
VISO Settings
It is recommended that you first familiarize yourself with the VISO
ROAD MAP which is a very helpful tool when using the VISO for the first time.
The ROAD MAP comprises four areas:
• Backlight Setup Area (see page 39)
• Profile Area (see page 51)
• Setup Area (see page 19)
• Logbook Area (see page 43)
Road Map

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General note:
The VISO goes out of ACCESS and back to the Main Window if no button has been
pressed within 15 sec.
ALL functions (except Power ON) can be performed ONLY when the VISO is in ACCESS mode.
To leave the Setup Area
Wait until the display times out, or press repeatedly until the Padlock window
shows. Then press or to exit.
VISO Settings
Padlock Window
• Preset jump counter
• Reset jump counter
• Turn the VISO OFF
• Padlock window
To enter the Setup Area
Perform ACCESS on or or . Then hold > 5 seconds
Performing ACCESS:
1 Press or or and release quickly. The padlock icon turns ON and OFF
2 When the padlock icon turns ON again, immediately press the same button and
keep it pressed (padlock turns OFF)
3 When the padlock icon turns ON again, release immediately
VISO Settings

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Feet/Meter Selector
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
Feet/Meter
VISO Settings
Press or to toggle between Feet/Meter.
The active selection flashes.
Press to save setting and enter the Mph/Kmh selector.
Note: Jump data is continuously stored in both feet and meter.
At any time stored information may be displayed in either unit
of measurement by selecting the respective mode.
Alti-Meter / Speed-Meter Selector
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
Alti-Meter / Speed-Meter
The VISO can be set to function either as an Alti-Meter or as a Speed-Meter.
VISO Settings
Press or to toggle between Alti-Meter or Speed-Meter
mode.
The active selection flashes.
Press to save setting and enter the Feet/Meter selector.

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Altitude Offset
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
Explanation
If the DZ landing elevation differs from that of the aircraft take off elevation, offset
the VISO prior to entering the aircraft as follows:
VISO Settings
Altitude Offset
Press and hold or to offset the current altitude.
Press to save setting and enter the Dive Type selector.
Note: When performing altitude offset, the VISO enters Jump Mode and the altitude
offset will be retained for 5 hours, if no jump is made. After 5 hours the VISO recali-
brates to the field elevation where it is currently located.
The altitude offset is not retained when the VISO is powered OFF.
Mph/Kmh Selector
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
Mph/Kmh
VISO Settings
Press or to toggle between Mph/Kmh.
The active selection flashes.
Press to save setting and enter Altitude Offset.
Note: Jump data is continuously stored in both Mph and Kmh.
At any time stored information may be displayed in either unit
of measurement by selecting the respective mode.

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Press to scroll forward through the dive type list.
Press to scroll backward through the dive type list.
Press to save setting and enter the TAS/SAS Selector.
0 = ---- (blank, factory default parameters)
1 = SLO (Slow) *
2 = STU (Student) **
* Dive Type, 1: SLO (Slow)
In SLO the exit fall rate and deployment calculation parameters are changed to fit
very slow falling types of dives, like wing suit dives, etc.
** Dive Type, 2: STU (Student)
In STU the descent rate parameters are changed to allow detection of short freefalls,
(2 sec).
VISO Settings
Dive Type Selector
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
Explanation
The Dive Type mode can be used to change parameters when the VISO detects free-
fall exit and canopy deployment.
Dive Type
VISO Settings

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See separate section on page 60 for more information about TAS and SAS.
VISO Settings
True Airspeed (TAS) / Skydiver’s Airspeed (SAS)
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS) / Skydiver’s Airspeed (SAS) • Set current year • Set current date •
Set current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
Explanation
True Airspeed (TAS) and Skydiver’s Airspeed (SAS) are two methods of calculating
the airspeed of a moving/flying/falling object.
TAS is a term used in aviation: It is the speed of an object relative to the surround-
ing air, regardless of the altitude.
SAS is a new concept developed by LARSEN & BRUSGAARD: SAS is the speed of a
skydiver calculated from measurements of air pressure and temperature and con-
verted to a fixed air pressure (875.3 mb) and a fixed temperature (+7.080C) which
corresponds to 4,000 feet ASL.
VISO Settings

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same body position), whereas TAS will show a different speed throughout the dive
(the same body position, different air density).
Below are some recommendations and numbers for SAS:
A good base speed should be: 110-115 mph.
A high base speed should be: 120-125 mph (tendency to wobble when docking).
A slow base speed should be: 100-105 mph (jumpers start to go low).
See separate section on page 60 for more information about TAS and SAS.
VISO Settings
True Airspeed (TAS) / Skydiver’s Airspeed (SAS)
VISO Settings
Press or to toggle between TAS and SAS.
The active selection flashes.
Press to save setting and enter the Set Current Year
selector.
NOTE: Jump data is continuously stored in both TAS and SAS.
Stored information may be displayed in either unit of measure-
ment by selecting the respective mode.
Recommendation:
When using the VISO as a Speed-Meter in a big way base it is
recommended to set it to SAS.
SAS will show the same speed throughout the dive (at the

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Set Current Date Selector
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
VISO Settings
Set Current Date
Press to increase date.
Press to decrease date.
Press to save setting and enter the Set Current Time selec-
tor.
Note: Date format is MM:DD.
Set Current Year Selector
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
VISO Settings
Set Current Year
Press to increase year.
Press to decrease year.
Press to save setting and enter the Set Current Date selec-
tor.

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Preset Jump Counter Selector
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
Explanation
The VISO can store up to 200 jumps in the logbook and numbers them starting from
the jump number that you preset here. The counter can be used to keep track on
the number of jumps and it can be reset at any time, but time and date for the last
reset remains stored and cannot be erased.
VISO Settings
Preset Jump Counter
Press to increase the jump counter.
Press to decrease the jump counter.
Press to save setting and enter the Reset Jump Counter
selector.
Set Current Time Selector
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
VISO Settings
Set Current Time
Press to increase time.
Press to decrease time.
Press to save setting and enter the Preset Jump Counter selec-
tor.
Note: Time format is HH:MM and in 24-hour format

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Turn VISO OFF Selector
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF• Padlock window
VISO Settings
Turn VISO OFF
Press AND at the same time and hold until the
VISO turns OFF.
Or, press to enter the Padlock window.
We recommend that you switch OFF the VISO when
traveling on commercial flights and when driving in
mountainous areas.
Note: When switched OFF the VISO cannot be used for jumping.
Customer settings are not lost when switched OFF.
To power the VISO ON, see page 12.
Reset Jump Counter Selector
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF • Padlock window
VISO Settings
Reset Jump Counter
Press AND at the same time for more
then 10 seconds to reset the Jump Counter
and delete the entire logbook.
Date and Time for the last reset is displayed
together with the number of resets which
have been made.
Press to enter the Turn VISO OFF selector
Note: Date, Time and the number of resets which have been made are stored and
there is no way to clear it. There is no way to restore the logbook information!
Date / Time
for last Reset

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Backlight Setup Area
Perform ACCESS on to enter the
Backlight Setup Area
(Performing ACCESS, see page 20)
Backlight ON/OFF
Press or to toggle between backlight ON/OFF
To leave the Backlight Setup Area
Wait until the display times out. Or, press to enter
the Padlock window and then press or to return
to the Main Window.
Note: Backlight is specifically for night jumps.
Padlock Window
Padlock Window
Alti-Meter/Speed-Meter • Feet/Meter when set to Alti-Meter • Mph/Kmh when set to Speed-Meter • Altitude
offset • Dive Type • True Airspeed (TAS)/ Skydiver’s Airspeed (SAS) • Set current year • Set current date • Set
current time • Preset jump counter • Reset jump counter • Turn the VISO OFF• Padlock window
VISO Settings
Padlock Window
Press or to leave the Setup Area and return to the
Main Window.
Or, press to return to Alti-Meter/Speed-Meter selector.