Digitool Instruments GC132926 Hot air balloon wire less temp gauge User Manual 565432

Digitool Instruments AB Hot air balloon wire less temp gauge 565432

Contents

transmitter dbitx1 user manual

DBI-TX1 User Manual Issue US3 Page 1/12
DBI-TX1 User Manual
U.S. Version
Free Balloon Envelope Temperature
Wireless Transmitter
DBI-TX1 User Manual Issue US3 Page 2/12
Safety
The manufacturer has designed this instrument to be safe when
operated. Do not use this instrument for any other purpose than
stated.
Operating restrictions
• This instrument should ONLY be used in ships referred as
free manned balloons.
• The DBI-TX1 must be mounted in the balloon exactly as
shown in this manual. The responsibility however for the
safety of the mounting of the sender is not a subject for the
manufacturer or their representatives.
Abbreviations
DBI-002 DigiTool Instruments Free Balloon Flight Instrument
DBI-TX1 DigiTool Instruments Envelope Temperature
Transmitter.
RF Radio Frequency
DBI-TX1 User Manual Issue US3 Page 3/12
Table of Contents
1. DESCRIPTION ............................................................... 4
1.1. GENERAL ......................................................................... 4
1.2. DBI-TX1 PHOTO .............................................................. 5
2. SPECIFICATION............................................................ 6
2.1. ENVELOPE THERMOMETER ACCURACY............................... 6
2.2. PHYSICAL DIMENSIONS ..................................................... 6
2.3. ENVIRONMENTAL RATINGS ................................................ 6
2.4. RADIO FREQUENCY TRANSMISSION.................................... 7
2.5. POWER SUPPLY................................................................ 7
2.6. RF TRANSMIT CONTROL .................................................... 7
3. INSTALLATION ............................................................. 8
3.1. SAFETY ............................................................................ 8
3.2. ATTACHMENT ................................................................... 8
3.3. ANTENNA ......................................................................... 9
3.4. ENVELOPE TEMPERATURE PROBE ..................................... 9
4. OPERATION ................................................................ 10
4.1. DBITX1 IDENTIFICATION CODE........................................ 10
4.2. DBITX1 IDENTIFICATION CODE PROGRAMMING ................ 10
4.3. POWER ON / OFF ........................................................... 10
5. MAINTENANCE ........................................................... 11
5.1. BATTERY (LITHIUM CELL) REPLACEMENT.......................... 11
5.2. APPROVED SERVICE AGENTS .......................................... 12
DBI-TX1 User Manual Issue US3 Page 4/12
1. Description
1.1. General
• The DBI-TX1 is a wire less transmitter monitoring free hot air
balloon envelope top temperature. It transmits data to the
DBI-002 flight instrument where temperature is displayed.
• The unit consists of a sturdy aluminum enclosure fitted with a
load tape slot attachment, exiting antenna and temperature
probe wires.
• The unit is power supplied with a replaceable long life lithium
battery. Battery replacement interval is typically four years.
• Power on/off is controlled automatic by the difference of box
(outside envelope) and temp probe (inside envelope)
temperatures. No operator action is required.
• Each unit has a unique serial code that is matched with the
receiver DBI-002. DBI-002 data reception is qualified by
serial code and comprehensive transmission error detection.
• Short duty cycle and low RF power data transmission
enables interference free operation and multiple units to
operate in close proximity.
• Conforms to FCC part 15.249
• FCC approval identification: TDJGC132926
DBI-TX1 User Manual Issue US3 Page 5/12
1.2. DBI-TX1 Photo
Antenna
wire
Box with
attachment
Temperature
probe
Temperature
probe wire
ID label and
location
DBI-TX1 User Manual Issue US3 Page 6/12
2. Specification
2.1. Envelope thermometer accuracy
Range °F Total error +/- °F
-15 to 32 7
32 to 122 5
122 to 167 4
167 to 257 2
257 to 302 4
302 to 347 5
347 to 392 7
2.2. Physical dimensions
Item Value Value
Box Length 50 mm 2.00 inch
Box Height 30 mm 1.18 inch
Box Width 45 mm 1.77 inch
Antenna wire length 90 mm 3.50 inch
Temperature wire length 254 mm 10.00 inch
Total weight 110 gram 3.9 ounce
2.3. Environmental ratings
Item Value
Box sealing class IP65
Box temperature High 257 °F
Box temperature Low -22 °F
DBI-TX1 User Manual Issue US3 Page 7/12
2.4. Radio frequency transmission
Item Data
Frequency 914.5 MHz
RF Power +0 dBm (1mW)
Modulation FM, deviation +/- 30 kHz
Type Approval
EMC conformity FCC part 15.249
Placard marking DBI-TX1
FCC ID: TDJGC132926
Code: NNNNN
Transmit duration 37 milliseconds
Transmit repetition interval 2.3 seconds
Transmit duty cycle 0.016
2.5. Power supply
Power supply CR2450 3 Volt Lithium Cell
Cell life (on) > 4000 hours
Cell life (off) > 40000 hours
Lithium cell replace interval 4 years
2.6. RF transmit control
Transmit on differential
temperature threshold,
(probe – box).
> 10 °F
Transmit off differential
temperature threshold,
(probe – box).
<= 10 °F
Transmit on minimum
duration
5 minutes
DBI-TX1 User Manual Issue US3 Page 8/12
3. Installation
3.1. Safety
Always consult corresponding envelope flight manual for safe
attachment.
3.2. Attachment
The DBITX1 attaches on one supplementary load tape piece
close to the top, outside of the envelope.
The supplementary load tape is stitched or velcro mounted on
the envelope load tape.
Supplementary load tape
passing through DBITX1
attachment slot.
Supplementary load tape
Attachment slot
DBI-TX1 User Manual Issue US3 Page 9/12
3.3. Antenna
Align the antenna wire straight out horizontally along the
supplementary load tape piece and secure the position. Avoid
metallic parts in the antenna proximity (2 meters).
3.4. Envelope temperature probe
Mount the temperature probe wire through the envelope fabric
to the inside of the envelope.
DBI-TX1 User Manual Issue US3 Page 10/12
4. Operation
4.1. DBITX1 identification code
Transmitter identification
code is marked on the
box placard.
4.2. DBITX1 identification code programming
Program the DBITX1 identification code to the DBI-002 flight
instrument by using the DBI-002 PC application software. Refer
to “DBI-002 User Manual”.
4.3. Power On / Off
The power on / off is automatic:
• The DBITX1 will start transmission when a temperature
difference between the box and the temperature probe is
greater than 10 °F.
• The DBITX1 will stop transmit after 5 minutes when a
temperature difference between the box and the temperature
probe is less than 10 °F.
• For permanent power off, remove internal battery coin cell.
See “5.2 Battery replacement”.
DBI-TX1 User Manual Issue US3 Page 11/12
5. Maintenance
5.1. Battery (Lithium cell) replacement
• During normal operation, the internal battery will last for
typical 10 years. Recommended replace interval is 4 years.
• Replace battery if DBITX1 does not operate properly.
Unmount the top lid attached
by the two bolts.
Unmount CCW.
Replace the coin cell:
• Replace type is “CR2450”.
• Positive terminal facing up.
• Inspect for clean battery
holder metal surface. Clean
with soft cloth if dirty.
Mount the top lid:
• Make sure seal is correctly
placed in lid groove.
• Tighten bolts firmly.
Mount CW.
DBI-TX1 User Manual Issue US3 Page 12/12
5.2. Approved service agents
Name Location Contact
DigiTool AB
Box 6190
100 00 Stockholm
Sweden
tel +46 8 343410
Email service@digitool.se

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