Hollis TX1 He User manual

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TX1 He OPERATING MANUAL
©2002 DESIGN (2014)
TX1 He
DIVE COMPUTER
OPERATING MANUAL

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TX1 He OPERATING MANUAL
©2002 DESIGN (2014)
WELCOME.........................................................................................4
WARNINGS........................................................................................5
NOTICES............................................................................................6
FCC ID................................................................................................6
FEATURES & FUNCTIONS............................................................7
ABBREVIATIONS/TERMS......................................................8
DISPLAY ICONS.......................................................................9
CONTROLS..............................................................................10
BUTTON NAVIGATION.........................................................11
ACTIVATION...........................................................................12
MENU SYSTEM......................................................................12
Navigating Menus.....................................................................12
AUDIBLE ALARM..................................................................13
PCINTERFACE.......................................................................14
POWER SUPPLY.....................................................................14
Battery Icon..........................................................................14
BATTERYSTATUS..................................................................14
TX1 He LOW BATTERY WHILE ON SURFACE..............15
TX1 He LOW BATTERY DURING DIVE...........................15
TMT (TRANSMITTER) LOW BATTERY...........................15
OPERATINGMODES.............................................................15
TRANSITION PERIOD..........................................................16
POWER SAVER MODE (PSM).............................................16
NORM SURFACE MODES............................................................17
NORM SURF MAIN................................................................18
NORM SURF ALT SCREENS................................................18
NORM MENU..........................................................................19
GAS MENU..............................................................................19
FLY/DESAT...............................................................................19
Fly/DesatScreen....................................................................20
PLAN MENU............................................................................20
Time Limits...........................................................................20
DepthLimits..........................................................................20
NORM/GAUGE LOG.............................................................21
Log Menu............................................................................21
SET MENU...............................................................................22
OP (OPERATING) MODE.....................................................22
HISTORY (NORM/GAUGE)..................................................23
TX1 He ID.................................................................................23
BATT/TMT...............................................................................23
DIVE PREVIEW......................................................................23
GAS SUB MENUS....................................................................24
GAS SWITCH MENU.......................................................24
SELECT GASES MENU...................................................25
SETGASES.........................................................................26
TRANSMITTERS
SET TRANSMITTER MENU....................................27
SET SERIAL NUMBER (CODE) SCREEN.............27
SET GROUPS
SET A (ALARMS)..............................................................28
SET U (UTILITIES)...........................................................29
SET SAFETY STOP....................................................29
SET GF (GRADIENT FACTOR)...............................30
SET T (TIME/DATE)........................................................31
SET S (SHORTCUT).........................................................31
SET D (DIVE MAIN)........................................................32
SET P (PREVIEW)............................................................33
CONTENTS
DIVE MODE FEATURES...............................................................34
PROXIMITY OF THE TMTS AND TX1 He........................35
Link Interruption Underwater............................................35
WET ACTIVATION.................................................................36
SMARTGLO®BACKLIGHT.................................................36
BAR GRAPHS..........................................................................36
TLBG.........................................................................................36
VARI..........................................................................................36
ALGORITHM..........................................................................37
GRADIENT FACTOR (GF)...................................................37
DEEP STOP (DS).....................................................................37
SAFETY STOP (SS).................................................................38
DIVE TIME REMAINING (DTR).........................................38
No Deco DTR (NDC)........................................................38
O2 Time Remaining (OTR).............................................39
GAS TIME REMAINING (GTR)..........................................39
GTRAlarm........................................................................39
TOTAL ASCENT TIME (TAT)..............................................40
NORM DIVE OP MODE................................................................41
NORM DIVE SCREENS.........................................................42
DEEP STOP PREVIEW...........................................................43
DEEP STOP MAIN..................................................................43
SAFETY STOP MAIN.............................................................43
DECOMPRESSION.................................................................44
DECO CEILING VIOLATION (DCV).................................44
DELAYED DECO VIOLATION (DDV)................................45
DEPTH VIOLATION (DV)....................................................45
GAS SWITCH WARNING.....................................................46
HIGH PO2................................................................................46
LOW PO2.................................................................................46
HIGH 02 SATURATION.........................................................47
VIOLATION GAUGE MODE (VGM)..................................48
NORM DIVE MAIN MENU
Gas Switch...........................................................................48
Isobaric Counter Diffusion (ICD) Warning.....................48
Select Gases.........................................................................48
DepthLimits........................................................................49
Current END (w/O2 NARC Yes/No) WOB......................49
DecoStops............................................................................50
Batt/TMT............................................................................50
GAUGE OP MODE.........................................................................51
GAUGE SURF SCREENS.......................................................52
GAUGE MENU
SWITCH TMT...................................................................53
FLY......................................................................................53
LOG.....................................................................................53
SET MENU.........................................................................53
OP MENU...........................................................................53
HISTORY............................................................................53
TX1 He ID...........................................................................53
BATT/TMT STATUS.........................................................53
DIVEPREVIEW.................................................................53
SWITCH TMT SUB MENU
GAUGE TMT SWITCH....................................................54
SEARCHING FOR TMT..................................................54

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SET GROUPS
SET A (ALARMS)..............................................................54
SET U (UTILITIES)...........................................................54
SET T (TIME/DATE)........................................................54
SET S (SHORTCUT) MENU............................................55
SET D (DIVE MAIN) MENU...........................................55
SET P (PREVIEW) MENU...............................................56
GAUGE DIVE SCREENS.......................................................57
GAUGE DIVE MAIN..............................................................57
GAUGE DIVE ALT..................................................................57
GAUGE CHANGE TMT SCREENS.....................................58
GAUGE TMT SWITCH..........................................................58
SEARCHING FOR TMT........................................................58
GAUGE DEPTH VIOLATION...............................................58
COMPASS MODE...........................................................................59
COMPASS DISPLAY ICONS.................................................60
OVERVIEW..............................................................................61
COMPASS MENU...................................................................61
NORTH OP MAIN...........................................................61
REFERENCE OP MAIN.................................................62
REFERENCE MENU......................................................62
Set Reference Heading.................................................62
CALIBRATION................................................................63
DECLINATION................................................................64
ALARMS...........................................................................64
REFERENCE....................................................................................65
PCINTERFACE.......................................................................66
PC REQUIREMENTS.............................................................66
CARE AND CLEANING.........................................................67
INSPECTIONS AND SERVICE.............................................67
BATTERYREPLACEMENT..................................................68
Battery Retention..............................................................68
Battery Cover Removal....................................................68
Battery Removal...............................................................68
Inspection...........................................................................69
TX1 He Battery Installation............................................69
Testing................................................................................70
TRANSMITTER BATTERY REMOVAL.............................70
TRANSMITTER BATTERY INSTALLATION...................70
Installing A Transmitter On A Regulator.......................71
Transmitter Compatibility With Nitrox.........................71
ALTITUDE SENSING AND ADJUSTMENT.......................71
RESET DURING A DIVE.......................................................71
WRIST STRAP.........................................................................72
StrapRemoval...................................................................72
Strap Replacement...........................................................72
Adjusting the Shock Cord Version.................................73
TECHNICAL DATA................................................................74
Specications.....................................................................75

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Welcome to Hollis Gear
and
THANK YOU
for choosing the
TX1 He.
The TX1 He was designed to create a user friendly dive computer that allows the
use of Air, Nitrox, and Trimix. It is a powerful instrument indeed - with a digital
compass, gauge mode, use of up to six transmitters, Gradient Factors, Hollis Dive
Planning Software, and many more features to be discussed within. It is a tool that
will open up many underwater activities to the user.
With the use of the included Hollis Dive Planning Software and data cable, all of the
TX1 He's potential dives can be explored. It is a valuable tool to plan contingencies
and gas requirements. One can also use the software as a learning tool, exploring
different gas choices, proles, and options.
It is imperative to fully understand all the features and functions before pushing to
the limits of the TX1 He. Reaching one's own limits is more likely before reach-
ing the TX1 He's. For this reason, do not neglect the need for proper knowledge,
training, skill, and experience before venturing into new territory. No computer can
replace those attributes.
We at Hollis wish you the best in your diving adventures.

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! WARNINGS !
Pay special attention to items marked with this Warning symbol.
If your TX1 He stops working for any reason while operating, it is important that you have anticipated this possibility
and are prepared for it. This is an important reason for not pushing the tables, oxygen exposure limits, and a critical
reason to avoid entering decompression, without proper training. If you dive in situations where your trip would be
ruined or your safety would be jeopardized by losing the use of your TX1 He, a backup instrument system is highly
recommended.
It is extremely important that you read this manual and understand completely before attempting to use your new
Hollis dive computer.
Each numeric and graphic display represents a unique piece of information. It is imperative that you understand the
formats, ranges, and values of the information represented to avoid any possible misunderstanding that could result
in error.
Hollis PDCs are NOT for use by commercial divers.
Hollis PDCs are intended for use by divers who have successfully completed a recognized course in SCUBA diving,
and have knowledge of the potential risks and hazards of SCUBA diving.
As with all underwater life support equipment, improper use or misuse of Hollis PDCs can result in serious injury or
death.
If you do not fully understand how to use the PDC, or if you have any questions, you should seek instruction in its
use from your Authorized Hollis Dealer before diving with it.
Remember that technology is no substitute for common sense, and a PDC only provides the person using it with
data, not the knowledge to use it. Remember also that the PDC does not actually measure and test the composition of
your body tissue and blood. Using an Hollis PDC, just as using the U.S. Navy (or other) Decompression Tables, is no
guarantee of avoiding decompression sickness. Every diver’s physiology is different, and can even vary from day to
day. No machine can predict how your body will react to a particular dive prole.
Never share or exchange a dive computer with another diver, or use another dive computer for a repetitive dive.
Special training, equipment, and support are necessary for diving deeper than the maximum recommended depth
limit for recreational diving, generally agreed to be 130 FT (39 M) by most diving instruction authorities.
Decompression diving is inherently hazardous and greatly increases your risk of decompression sickness, even
when performed according to the PDC's calculations.
Oxygen features are intended for use by divers who have successfully completed a recognized course in diving with
enriched nitrogen-oxygen (Nitrox) mixtures, and have knowledge of the potential risks and hazards of diving with
Nitrox. Maximum limits for exposure to oxygen should not be exceeded, and the consequences of CNS (Central Ner-
vous System) Oxygen Toxicity and Pulmonary Oxygen Toxicity can be deadly.
Helium features are intended for use by divers who have successfully completed a recognized course in diving with
Trimix mixtures, and have knowledge of the potential risks and hazards of diving with Trimix.
Diving at high altitude requires special knowledge of the variations imposed upon divers, their activities, and their
equipment by the decrease in atmospheric pressures. Hollis recommends completion of a specialized Altitude train-
ing course by a recognized training agency prior to diving in high altitude lakes or rivers.
Repetitive dives in a series should only be conducted at the same Altitude as that of the rst dive of that series.
Repetitive dives made at a different Altitude will result in an error equal to the difference in barometric pressure, and
possibly a false dive mode with erroneous data.
If an Hollis PDC is activated at an elevation higher than 14,000 feet (4,270 meters), it will immediately shutdown or
revert to Watch Mode.

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FCC ID: MH8A
FCC COMPLIANCE:
This equipment complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1.) This equipment may not
cause harmful interference. 2.) This equipment must accept any interference received, including interference that may cause undesired opera-
tion.
FCC INTERFERENCE STATEMENT:
This equipment has been tested and found to comply with the limits for an Intentional Radiator, a Class B Digital Device, pursuant to Part 15 of
FCC Rules, Title 47 of the Code of Federal Regulations. These rules are designed to provide reasonable protection against harmful interfer-
ence in a commercial or residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications.
There is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television
reception, which can be deter-mined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:• Reorient or relocate the receiving antenna.• Increase the separation between the equipment and receiver.•
Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.• Consult the dealer or an experienced
radio/TV technician.
! WARNING: Changes or modication to this unit not expressly approved by HOLLIS/2002 Design could void the
user's authority to operate the equipment.
NOTICES
LIMITED TWO-YEAR WARRANTY
For details, refer to the Product Warranty Registration Card provided.
COPYRIGHT NOTICE
This operating manual is copyrighted, all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated,
or reduced to any electronic medium or machine readable form without prior consent in writing from HOLLIS/2002 Design.
TX1 He Operating Manual, Doc. No. 12-4101
© 2002 Design, 2013
San Leandro, CA USA 94577
TRADEMARK, TRADE NAME, AND SERVICE MARK NOTICE
HOLLIS, the HOLLIS logo type, TX1 He, the TX1 He logo, Gas Time Remaining (GTR), Diver Replaceable Batteries, Graphic Diver Interface,
Tissue Loading Bar Graph (TLBG), Pre-Dive Planning Sequence (PDPS), SmartGlo, Set Point, Control Console, Turn Gas Alarm, and HOLLIS
Computer Interface (HCI) are all registered and unregistered trade-marks, trade names, and service marks of HOLLIS. All rights are reserved.
PATENT NOTICE
U.S. Patents have been issued to protect the following design features: Dive Computer with Wireless Data Transmission (U.S. Patent no.
7,797,124), Air Time Remaining (U.S. Patent no. 4,586,136 and 6,543,444) and Data Sensing and Processing Device (U.S. Patent no.
4,882,678). Set NIBG Alarm and other patents pending. User Setable Display (U.S. Patent no. 5,845,235) is owned by Suunto Oy (Finland).
DECOMPRESSION MODEL
The program within the TX1 He simulates the absorption of inert gases into the body by using a mathematical model. This model is merely a
way to apply a limited set of data to a large range of experiences. The TX1 He dive computer model is based upon the latest research and ex-
periments in decompression theory. Still, using the TX1 He, just as using the U.S. Navy (or other) No Decompression Tables, is no guarantee
of avoiding decompression sickness, i.e. “the bends”. Every diver’s physiology is different, and can even vary from day to day. No machine
can predict how your body will react to a particular dive prole

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FEATURES/FUNCTIONS

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ABBREVIATIONS/TERMS
ACTIV = Activation
AL = Alarm
ALT = Alternate
ATA = Standard Atmosphere (unit)
AUD = Audible
AVAIL = Available
BATT = Battery
CAL = Calibrate (compass)
CDT (CD) = Countdown Timer
DCS = Decompression Sickness
DECO = Decompression
DESAT = Desaturation Time
DFLT = Default
DTR = Dive Time Remaining
DURA = Duration (backlight)
E = East (compass)
EDT = Elapsed Dive Time
EL = Elevation (altitude)
END = Equivalent Narcotic Depth
FHe = Fraction of Helium (%)
FO2 = Fraction of Oxygen (%)
FORM = Format (date, time)
FT = Feet (depth)
GAUG = Digital Gauge Dive Mode
GF = Gradient Factor
GLO = Glow (backlight)
GTR = Gas Time Remaining
HCI = Hollis Computer Interface
HIST = History
HT = Hypoxic Threshold
LO = Low (battery)
M = Meters (depth)
MIN = Minutes (time)
MOD = Maximum Operating Depth
N = North (compass)
NDC = No Deco DTR
NDL = No Deco Limit
NE = Northeast (compass)
NO = Number
NORM = Normal Dive Mode
NW = Northwest (compass)
O2 = Oxygen
OTR = O2 DTR
PDC = Personal Dive Computer
PO2 = Partial Pressure of O2 (ATA)
PRESS = Pressure
PSM = Power Saver Mode
REF = Reference (compass)
S = South (compass)
SAFE = Safety (stop)
SE = Southeast (compass)
SEC = Seconds (time)
SN = Serial Number
SURF = Surface
SW = Southwest (compass)
SWCH = Switch (gas)
TAT = Total Ascent Time (deco)
TLBG = Tissue Loading Bar Graph
TMR = Timer
TMT = Transmitter
VIOL = Violation
W = West (compass)
WOB = Work Of Breathing

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DISPLAY ICONS
FTM
GTR
TAT
min
PO2 BAR PSI
SURF
Dot Matrix
1
2
3
4
5
6
78
9
10
11
12
1 Low Battery Indicator p. 15
2 Log p. 21
3Value is Time
4 Depth ID (units) p. 29
5 Surface Interval p. 16
6 TMT Link p. 27, 35
7 Value is PO2p. 46
8 Pressure ID (units) p. 29
9 Temperature or Heading p. 18, 60
10 Time is Minutes
11 Total Ascent Time p. 40
12 Gas Time Remaining p. 39

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BUTTONS
The TX1 He utilizes 3 Control Buttons that allow you to select mode options and access specic information.
They are also used to link the Transmitter(s), enter Settings, activate the Backlight, and acknowledge the Audible
Alarm. Throughout this manual they will be referred to as the M, A, and S buttons.
Pressing different combinations of these buttons will navigate through different menus and options of the TX1 He.
The symbols in the table below will illustrate how to proceed through the menus.
SYMBOL MEANING
PRESS THE BUTTON, LESS THAN 2 SEC-
ONDS, THAT THE INDEX FINGER POINTS
TO.
HOLD BUTTON, GREATER THAN 2 SEC-
ONDS, THAT THE INDEX FINGER POINTS
TO.
FTM
GTR
TAT
VARI
TLBG
min
PO2 BAR PSI
SURF
A
M
S
CONTROLS