TACTICAL ALTIMETERS L338250-12 Military Altitrack Basic Instruction Manual

MILITARY ALTITRACK BASIC™ Instruction Manual
Rev. 1

Introduction:

1.1 Features

• 45 deg. offset scale for easy line of sight viewing when mounted on hand or wrist
• Altimeter casing in rugged, precision-machined aircraft aluminum
• Choice of symmetric or asymmetric scale graduation.
• Available in STEALTH HD Black face or original Whiteface in either feet or meters
• Adjustable electro-luminescent backlight for night jumping
• Smooth, none erratic pointer movement… step motor controlled
• Automatic calibration to local elevation
• Two separate pressure sensing modules for maximum reliability
• Scratch proof lens made from high-impact etched glass
• Shockproof and waterproof (5ft/24hrs)
• Operating altitude 0 to 40,000 ft.(0 to 12,191 m)
• Temp. range: -35°C to +80°C,
• Continuous operation: Will operate at -50°C for 10 minutes
• ½ AA battery (2yr. battery life)

Description

2.1 Analog Face![TACTICAL ALTIMETERS L338250 12 Military Altitrack Basic

• Analog Face](https://manuals.plus/wp-content/uploads/2022/03/TACTICAL- ALTIMETERS-L338250-12-Military-Altitrack-Basic-Analog-Face-550x265.png)

  1. Right Front Button
     • Power ON
     • Enable / Disable and adjust backlight intensity
     • Power OFF

  2. Left Front Button
     • Power ON
     • Perform ACCESS
     • Adjust altitude

  3. “ACCESS” indicator

  4. “LOW BAT” indicator

  5. Serial number

Power ON

Press the Right or Left Front Button until “ACCESS” and “LOW BAT” flashes. Then release the button.
The MAB runs a self-test.
The MAB can be used for jumping, if:

• The pointer moves from “6” to “0”.
• No low bat flashing

The MAB must not be used for jumping if:

• The unit sounds a beep every minute.
• Battery capacity is insufficient (see paragraph 7)

Note: The MAB must be switched ON prior to entering the airplane
2.1 Before night jumping:
Verify that the backlight is functioning (see paragraph 6)

Jump Mode

• Entering Jump Mode: Shortly after take-off (at approx. 1,000 feet/300 meters) the MAB switches to Jump Mode and the pointer moves to the present altitude.
• Exiting Jump Mode: The MAB exits Jump Mode automatically within one minute after it senses ground level again. If the MAB has been preset to a different altitude it exits Jump Mode as described in paragraphs 5-2.

Power OFF

1. Press and let go of the Right Front Button
2. When “ACCESS” lights, press immediately and let go again
3. When “ACCESS” lights, press immediately and let go again
4. When “ACCESS” lights, press immediately and let go again

The pointer moves to “6” and the unit switch OFF

Note: If the MAB is not manually switched OFF, it will automatically switch OFF 14 hours after the last jump or 14 hours after the last pressing of any button (28 hours in case adjustment of altitude or QFE has been performed without jumping with the MAB).
Note: In case of landing in water, rinse the instrument in fresh water and let it dry. In case of landing in saltwater, replace the air filter (see manual).

Altitude Offset

6.1 Zeroing the MAB
The MAB continuously adjusts to the local elevation and the pointer is at the zero “0” position. If the pointer is not at “0” prior to jumping, the unit has not adjusted itself to the local elevation and it must be zeroed.
To zero: Turn the unit OFF and then ON.
Alternatively, it may also be zeroed by performing ACCESS and manually moving the pointer to “0”. However, in this case, the unit enters Jump Mode and will not continuously adjust to the local elevation.
6.2 Altitude Offset
If the elevation at the DZ is different from that of the airport of take-off, then adjust the MAB by activating the “Altitude Offset” mode:

1. Perform ACCESS
   

2. Press the Right Button (+) if DZ Elevation is LOWER than take-off elevation

3. Press the Left Button (-) if DZ Elevation is HIGHER than take-off elevation.

When adjusting to a negative attitude on the ground, use the inner negative scale indication.
If adjusting more than -3000 ft. / -1000 m the inner negative scale resolution is still used.
MAB exits “Altitude Offset” mode if no button is pressed within 5 seconds.
Note: When performing a manual adjustment of altitude, MAB enters “Jump Mode” and the current local elevation is stored in the memory for 14 hours if no jump is made.
MAB will stay in Jump Mode for 14 hours and will not continuously adjust itself to the local elevation.
After 14 hours MAB will exit “Jump Mode” and set the pointer at the zero “0” position.
ON THE GROUND
If the DZ altitude at the new DZ is known before entering the airplane:

1. Press the Left Front Button and release it quickly
2. When “ACCESS” lights, press the button immediately and keep it pressed
3. When “ACCESS” lights again, release the button immediately
   Press the Right Front Button (+) or the Left Front Button (-) to move the pointer to the selected altitude.

When adjusting to a negative attitude on the ground, use the inner negative scale indication
Note: When performing a manual adjustment of altitude, the MAB enters “Jump Mode” and the altitude is stored in the memory for 14 hours if no jump is made.
After 14 hours the MAB calibrates to the new elevation and displays “0”
The MAB switches OFF automatically 14 hours after the recalibration.
The altitude offset is not retained when the MAB is switched OFF.
IN THE AIRPLANE
If the DZ elevation changes during the flight:
Perform “ACCESS”, point 1-3 as described in paragraph 1, and then by means of the Right Front Button (+) or the Left Front Button (-), set the correct altitude
The MAB exits “Altitude Offset” mode if no button is pressed within 5 seconds.

Backlight

Enable: Press and hold the Right Front Button for 5 seconds and confirm visually that the backlight has turned on.
Disable: Press and hold the Right Front Button for 7 seconds and confirm visually that the backlight has turned off
Adjusting the backlight intensity: Click on the Right Front Button again to adjust the backlight intensity, 1 to 10 (1 = Low, 10 = High).
Note: The backlight is automatically disabled when manually switching OFF the MAB.
Note: If the backlight is turned ON while the MAB is not in Jump Mode, then the backlight will automatically turn OFF after 2 hours.
If the backlight is turned ON while the MAB is in Jump Mode, the backlight will remain ON until the unit exits Jump Mode.

Battery Status

If low bat flashes please change the battery

Loosen and Fasten Allen Socket Screws

General
Before replacing the Velcro Wrist Mount, resetting the MAB, and replacing the battery cover with an integrated Air Filter, it is necessary to loosen several Allen socket screws.
Do not use an Allen Key to remove or fasten screws. Use LARSEN & BRUSGAARD “WERA” 140 cNm fixed Torque screwdriver (accessory) or equivalent.

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Removing/Replacing the Velcro Wrist Mount

Fig. 6 – Wrist Mount

The Velcro wrist mount assembly is fastened to the MAB with 4 Allen socket screws.

Replacing the Battery

1. Loosen the 4 Wrist Mount screws and remove the assembly. See Fig. 8
2. Loosen the 4 battery cover screws and remove the cover. See Fig. 9
3. Remove the old battery
4. Install new battery noting polarity. Use SAFT LS 14250 (3.6V) or equivalent
5. Press a paperclip into the tiny (Reset) hole next to the battery and release The unit restarts
6. Put the battery cover back into place and fasten the 4 screws. Pay attention that the surfaces underneath and on the black rubber sealing are clean.
7. Put Wrist Mount assembly back into place and fasten 4 screws

After battery replacement, the battery system requires 2 minutes to calibrate itself before showing the correct status. While calibrating, the battery icon toggles between full and low.
Note: Customer settings are not lost when removing the battery. However, the built-in clock may need to be reset to the current time.

Resetting the MAB

The reset button is located inside the battery compartment.
To gain access to the reset button, remove the wrist mount and the battery cover.
Follow steps 1 to 5:

Step 1. Loosen the 4 wrist mount
Step 2. Loosen the 4 battery screws and remove the assembly.
Cover screws and remove the cover

Step 3. Press a paperclip into the tiny (Reset) hole next to the battery and release.
The unit restarts.
Step 4. Put the battery cover back into place and fasten the 4 screws. Pay attention that the surfaces underneath and on the black rubber sealing are clean.
Step 5. Put Wrist Mount assembly back into place and fasten 4 screws.
After resetting, the battery system requires 2 minutes to calibrate itself before displaying the correct status.
While calibrating, the battery icon toggles between full and low.
Note: Reset the unit after battery replacement, when troubleshooting, and when verifying software version number.

Air Filter

Fig. 11 – Air filter

The MAB is water-resistant down to 5 ft for 24 hours.
After jumping into (salt) water the Air Filter may be contaminated with particles (salt and dirt) and must be rinsed in freshwater or replaced.

Replacing the Air Filter

General: After jumping into (salt) water, the small holes in the Air Filter may have become contaminated with particles (salt and dirt) which could prevent the sensors inside the instrument from reading the air pressure correctly on the next jump.
If no particles can be seen after rinsing the instrument in freshwater then replacement of the Air Filter should normally not be necessary and the unit can be put aside to dry. However, for safety reasons, LARSEN & BRUSGAARD recommends that the Air Filter is replaced after each water jump.
After rinsing the MAB thoroughly in freshwater, replace the battery cover which has the Air Filter integrated. Note: Wrist Mount assembly must be removed before rinsing

1. Loosen the 4 battery cover screws and remove the cover.

2. Place new battery cover with integrated Air Filter into place and fasten the 4 screws.
   Pay attention that the surfaces underneath and on the black rubber sealing are clean.

3. Put Wrist Mount assembly back into place and fasten 4 screws

Specifications, MAB

Mechanical

Dimensions:| 85 x 69 x 25 mm
Weight:|  238 g

Other

Present altitude:|  +/- 10 ft
Operating altitude:| 0 to 40,000 ft (0 to 12,191 m)
Storing Temperature:|  -20C to +70C
Operating Temperature Range:| -35C to +80C continuous operation. Will operate at -50C for 10 minutes
Storing Pressure:| 200 to 1075 mBar
Maximum allowable humidity:| Up to 99,9% rel humidity
Waterproof:| 5 feet for 24 hours
Altitude Adjustment Range:|  -1,650 ft. to 13,780 ft. (approx. -500 m to 4,200 m).
Function Period:| 14 hours
Maintenance:| 4 and 8 years from date of manufacture
Battery type:| SAFT Lithium LS 14250 (3.6V) or equivalent
Battery Life Time (at normal use):| approximately 1 year
L&B part no.:|  338250
NATO Stock no.| 6675-22-627-8792

Warranty

The following conditions apply to the MAB
If within 24 months of the purchase of the MAB a defect or damage is identified by faulty manufacture, LARSEN & BRUSGAARD will repair the unit at no cost to the end-user.
To make a claim under this warranty, send the unit to an authorized dealer or directly to LARSEN & BRUSGAARD together with the dated purchase invoice or receipt.
The warranty becomes void if the damage is caused by external circumstances or if the unit has been serviced or repaired by third parties unauthorized by our national agents or
LARSEN & BRUSGAARD.
All further claims, especially for defects after skydiving accidents, are excluded.
LARSEN & BRUSGAARD has no obligation to honor any extension of warranty granted by any national agent.
Waiver of Liability
The buyer and user of the MAB
indemnify the manufacturer and vendor from any liability for damage incurred before, during, and after skydiving with the instrument.

Contact information

LARSEN & BRUSGAARD
Ledreborg Alle 28
4000 Roskilde
Denmark
info@lbaltimeters.com

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