RJE ULB-350 Series User manual

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TECHNICAL MANUAL
ULB-350 SERIES
UNDERWATER ACOUSTIC BEACON
August 1, 2002
REV 00
RJE International, Inc.
15375 Barranca Pkwy, Suite B107,
Irvine, California 92618
Tel: [phone] Fax: [phone]
E-mail: [email protected] Web Page: www.rjeint.com
DOCUMENT NO. 03-TM-0046
RJE International, Inc.
Irvine, California

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This manual should be read in its entirety
prior to using the ULB-350 Series

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SECTION I
INTRODUCTION
1.1. GENERAL. This manual contains the description, operation,
theory and maintenance procedures for the Underwater Acoustic
Beacon Model ULB-350 Series, hereafter referred in this manual as the
Model ULB-350.
1.1.1. The ULB-350 is a water switch activated underwater locating
device designed for use in marking applications. Housed in a water
tight case, the ULB-350 consists of an electronic module, transducer
and a self contained battery. The ULB-350 operates at depths down
to 4,000 feet (1216 m).
1.1.2. The ULB-350 will operate for a minimum of 20 days under
normal conditions.
FIGURE 1. ULB-350 UNDERWATER ACOUSTIC
BEACON

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TABLE 1. ULB-350 ACOUSTIC BEACON
SPECIFICATIONS
Operating Frequency ..................... 27 or 37kHz ± 1kHz
Operating ........................................ Depth Surface to 4,000 feet
(1216 meters)
Pulse Length .................................. 10 milliseconds ± 10%
Pulse Repetition Rate .................... Not less than 0.9 Pulses/Sec
Operating Life ................................. 20 Days (minimum)
Acoustic Output .............................. 163 db at 1 meter
Operating Temperature Range ....... +28°F to +100°F (-2°C to
+38°C)
Actuation ......................................... Fresh or salt water
Size ................................................. 1.70 inches (4.30 cm) diameter
x 3.1 inches (7.90 cm) long
Weight, Beacon ............................... 7.0 ounces (217 grams)
Storage Temperature ...................... -65°F (-54°C) to 160°F (71°C)

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SECTION II
BEACON MAINTENANCE
2.1. BEACON TESTING. The beacon should be tested prior to
each use.
2.1.1. Using the 42A12 Series Ultrasonic Test Sets, test the bea-
con in the following manner:
2.1.2. Turn the GAIN control to a fully clockwise position. A
pronounced background noise should be present. Lack of noise
may indicate a dead battery. Should this occur, replace battery in
the test set before resuming operational testing.
2.1.3. Set the TUNING control to approximately midscale. Rub-
bing fingers in front of microphone should produce a rushing noise
from the speaker.
2.1.4. Set the GAIN control at a comfortable listening level.
2.1.5. Point the microphone of the Test Set towards the water
switch end of the beacon for best results. If the beacon is mounted,
position the Test Set for maximum unobstructed signal. Beacon
operation will be indicated by an audible pulsing tone.

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SECTION II
MAINTENANCE
2.2. GENERAL. This section describes beacon cleaning, disassem-
bly, O-ring replacement, battery replacement and battery testing.
2.3. BEACON CLEANING. Clean the switch end of the beacon
with mild detergent then dry thoroughly with a clean cloth.
2.4. BEACON DISASSEMBLY. Disassembly of the beacon is
limited to battery replacement, as outlined in Section 2.5.
2.5. BATTERY REPLACEMENT AND TESTING.
2.5.1. GENERAL. Perform an operational test (Section 2.1.) to
determine if beacon is operational. If not, insert a new battery and run
the test again (Section 2.1.) Battery replacement should be done in a
maintenance shop under clean conditions to prevent dust from contami-
nating O-ring and lubricant. Because the old O-ring may have devel-
oped a set with age, a replacement is recommended at the time of
battery change. O-ring lubrication should be applied to the new O-ring
and threads before installation.

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FIGURE 2. BATTERY END CAP REMOVAL
2.5.2. PROCEDURE. To replace the battery, remove battery end
cap from beacon as follows:
2.5.3. Remove the three brass 4-40 machine screws from the battey
end cap. Lift that battery end cap to access the battery.
2.5.4. Remove battery from beacon. Replace with battery a 9 Volt
Alkaline or Lithium Battery. Note: Battery orentation is based on the
battery contacts. If battery is installed the wrong way, then the battery
end cap will note seat on the beacon housing.

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FIGURE 3. BEACON EXPLODED VIEW SHOWING
RELATIVE LOCATION OF BATTERY AND RELATED
PARTS
CAUTION
DIRT, LINT, SAND AND OTHER FOREIGN SUB-
STANCES IN LUBRICANT ON SEALING SURFACES
MAYALLOW WATER LEAKAGE THROUGH THE O-
RING SEAL. SCRATCHES OR GOUGES WILL ALSO
CAUSE WATER LEAKAGE.
2.5.5. Check O-ring for ware or damage. If it is necessary to replace
O-ring. remove the old O-ring from the battery end cap. Do not use
steel screwdriver or sharp tool because of danger to damaging O-ring
groove . Clean O-ring groove in the body and the threads on the cover
by wiping them thoroughly with mild soap and water.
2.5.6. Carefully install new O-ring on battery end cap. Apply a thin
coating of O-ring lubricant to O-ring and O-ring groove.

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2.5.9. Replace the battery end cap and install the three 4-40 brass
machine screws. Tighten until the cap flange contacts the body or leaves
less than a 0.003 inch (0.076 mm) gap. Use hand force only on the
brass screws. Clean beacon exterior of excess O-ring grease.
2.5.10. Perform operational test of beacon as outlined in Section 2.1.
3.0 Returning Product for Service
When shipping a product back to RJE from either inside or outside
the United States, the following instructions will help ensure the
equipment arrives with the minimum possible delay. Any deviation
from these instructions increases the potential for delay.
Step 1 - Get a Return Authorization
The best way to make sure RJE is aware of your intentions to ship
equipment is to obtain a Return Material Authorization (RMA)
before sending the shipment. Return Material Authorizations are
issued by Sales Administration or Customer Service and are used
to notify us of your needs in advance of arrival so we can provide a
faster turnaround. When requesting a Return Material
Authorization, please give us the following information.
•What is being shipped (include the serial number)
•When you plan to send the shipment
•What problem(s) need correction
•When you need the instrument returned
When the Return Material Authorization is issued, we will tell you
the RMA number. Please include this number on all packages and
correspondence.
Mark the Package(s)
To: RJE International, Inc. (RMA Number)
15375 Barranca Parkway, Suite B107
Irvine, California 92618

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Step 3 - Update RJE International
Send the following information by fax or telephone to RJE.
Attention: Sales Administration
Fax: [phone]
Phone: [phone]
• Detailed descriptions of what you are shipping
(number of packages, sizes, weights, and contents).
• The name of the freight carrier
• Master Air bill number
• Carrier route and flight numbers for all flights the
package will take

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SECTION III
WARRANTY
RJE International warrants that this equipment (referred to as the unit) will be
free from defects in materials and workmanship, when used under normal
operating conditions as determined solely by RJE International, for a period of
one (1) year from the date of shipment from RJE International.
As the sole remedy for breach of the foregoing warranty, RJE International shall
repair or replace, at RJE International’s option, any unit, component or part
thereof found defective or nonconforming within said one (1) year period from
the date of shipment. Customer shall give RJE International notice of any defect
or nonconformity and, if so instructed by RJE International, customer shall, at
its expense, ship the unit, component or part to RJE International. If RJE
International determines that the unit, component or part is actually defective or
nonconforming, it shall, at its expense, ship a new or a rebuilt unit, component
or part to the customer. The customer shall be responsible to perform, at its own
expense, any necessary installation work related to any defective or nonworking
unit, component or part. The functionality and operational aspects of the unit is
determined by the unit operating within the specifications and is dependent of
proper maintenance as required to be performed by the customer.
RJE International shall not be liable for any expense or damages resulting from
interruptions in the operation of the unit.
RJE International shall not be liable for the cost of any repairs undertaken by the
customer or any third party without RJE International prior written authoriza-
tion.
RJE International shall not be liable for any incidental, special consequential or
exemplary damages arising out of the installation, use, testing, servicing or
maintenance of any unit, component or part. This warranty is given in lieu of all
other warranties, expressed or implied, including the warranties of merchant-
ability or fitness for a particular purpose.
RJE International’s total liability under this warranty is limited to the
remanufacture or replacement of the unit, component or part.

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APPENDIX A
ULB-350/TD
A.1. GENERAL. The ULB-350/TD is configured with the time delay
option that is factory set. This configuration will delay the normal
underwater operation of the beacon based on the time set at the factory
(ie.., 8, 16, or 32 minutes).
A.2. BEACON DELAYING FUNCTION.
A.2.1. When the water switch is activated the beacon will ping several
times and then begin the selected delaying period. This function is
provided to verify the operation of the beacon and the delaying period.
A.2.2. Upon completion of the selected delaying period the beacon will
resume pinging for the live of the battery.
A.2.3. Removing the beacon from the water will reset the delaying
period.