NOVATECH Beacons & Flashers

AS-900A
Operation and

Maintenance Manual

UM05-6

271 Brownlow Avenue

Dartmouth, Nova Scotia

Canada

B3B 1W6

Phone: +1 (902) 468-3007

Fax: +1 (902) 468-3009

(C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved
 AS-900A Argos Beacon Operation & Maintenance Manual
March 2007 Version 3.0

© 2007 by Cobham Tracking & Locating Ltd., All

SALES AND SERVICING
Rights Reserved. This manual may not be
For Sales or Technical Assistance Please Contact:
reproduced in anyway without written permission
of Cobham Tracking & Locating Ltd.. Cobham Tracking & Locating Ltd.

271 Brownlow Avenue

Dartmouth, Nova Scotia

B3B 1W6
Information contained in this manual is subject to
Canada
regular updates and changes
Ph: +1 (902) 468-3007

Fax: +1 (902) 468-3009

sales@seimac.com

Cobham Tracking & Locating may have patents,

patent applications, trademarks, copyrights, or
other intellectual property rights covering subject
matter in this document. Except as expressly
provided in any written license agreement from
Cobham Tracking & Locating, the furnishing of
this document does not give you any license to
these patents, trademarks, copyrights, or other
intellectual property.

13
(C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved
AS-900A Argos Beacon Operation & Maintenance Manual AS-900A Argos Beacon Operation & Maintenance Manual
March 2007 Version 3.0 March 2007 Version 3.0

Table of Contents
SPECIFICATIONS
1 OPERATOR WARNINGS ............................................................. 2
Transmitter Output 1 watt
Harmonics -40 db minimum 2 INTRODUCTION ......................................................................... 3

Battery Life 30 days 3 SHIPPING BOX CONTENTS ........................................................ 4

Batteries 4 alkaline ‘C’ cells
4 OPERATION ............................................................................... 5
Operating and Storage -40 °C to +60 °C
Temperature 4.1 QUICK START .......................................................................................... 5
Ocean Depth Rating 24,000 ft. (7,300 m) 4.2 INSTALLATION .......................................................................................... 5
On/Off Control Automatic pressure activated 4.2.1 Antenna............................................................................................5
switch. Beacon OFF below 10
meters and ON above 8 meters. 4.2.2 Pressure Case...................................................................................6
Manual override ON/OFF control by 4.2.3 Batteries ............................................................................................6
rotating knob. 4.2.4 Turn On & Off ...................................................................................6
Transmit Frequency ARGOS-II band (S1-S23, L1-L3) 4.2.5 Test Operation .................................................................................7
401.6300 MHz – 401.6800 MHz
5 LICENSING REQUIREMENTS....................................................... 8
Antenna Field replaceable ½ wave whip
6 MAINTENANCE.......................................................................... 9
Zinc anode protected
Materials Case and pressure switch: 6.1 REGULAR MAINTENACE ........................................................................... 9

6061-T6 aluminum hard anodized 6.2 O-RING FACTS ....................................................................................... 9

to MilSpec A8625, Type 3 6.3 O-RING MAINTENANCE ........................................................................ 10
Antenna Cap: 6.4 PRESSURE SWITCH CUP SEAL .................................................................. 10
Brass core with molded neoprene 6.4.1 Disassembly ....................................................................................11
rubber on exterior surface
6.4.2 Lubrication .....................................................................................11
Weight with Batteries In air 3.6 lb (1.6 kg)
In water 2.1 lb (0.95 kg) SPECIFICATIONS ............................................................................ 12

Dimensions (exclusive of 18.5” long (470 mm), 1.7” diameter SALES AND SERVICING ................................................................. 13
antenna) (43 mm)

12 1
(C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved (C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved
AS-900A Argos Beacon Operation & Maintenance Manual AS-900A Argos Beacon Operation & Maintenance Manual
March 2007 Version 3.0 March 2007 Version 3.0

6.4.1 Disassembly
1 Operator Warnings
1. Remove the two socket head cap screws on the Zinc Anode.
As with any sealed pressure case, the contents could be under 2. Withdraw the Zinc Anode and the black “Delrin” Knob
pressure due to battery or seal failure. This could expel the Carrier.
batteries with force when the Pressure Switch is removed and
cause severe injury. To be safe, always point the open end 3. Make sure the PS-200 Pressure Switch is in the upright
away from you and always remove the Pressure Switch first. position (Cup Seal up, spring down); this will make sure a
The Pressure Switch is designed to vent any internal pressure small internal pin will not fall out. Do not lose this pin.
when it is being removed. If a battery is trapped in the case take 4. Carefully pry off the rubber Cup Seal, do not scratch the Cup
extreme care, there could be a pressure buildup behind it and Seal or the mating “O” ring surface.
the battery could be expelled at any time.
5. Observe the S.S. Flat Spring and note how it is installed.

6.4.2 Lubrication
1. Clean all surfaces and the Cup Seal.
2. Lubricate (very lightly) the “O” ring shaped portion of the Cup
Seal and the mating aluminum surface with silicone grease
(Parker Super O Lube). Do not spread the silicone grease
anywhere else. Excess silicone grease can cause the
Pressure Switch to fail.

2 11
(C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved (C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved
AS-900A Argos Beacon Operation & Maintenance Manual AS-900A Argos Beacon Operation & Maintenance Manual
March 2007 Version 3.0 March 2007 Version 3.0

ƒ O-rings must be lightly lubricated with silicone-based grease.

We recommend “Parker Super O Lube”. 2 Introduction
ƒ A typical seal failure results in a very small amount of water
entering the case, not a flooded case. Most seal failures Thank you for purchasing the Novatech AS-900A by Cobham
occur near the surface. Tracking & Locating.

ƒ The O-ring becomes less flexible as the rubber ages. If you have suggestions for improvements to any part of this
product or this manual, please contact us using the contact
If you are operating or storing at low temperature, it makes it information at the back of this manual. We strive to improve our
even more important to service the O-ring regularly. products and documents continuously and we very much
appreciate your feedback.

6.3 O-Ring Maintenance The AS-900A ARGOS Beacon contains an ARGOS system
transmitter designed as a ruggedized incident alerting system for
Cobham Tracking & Locating strongly recommends that O- rings oceanographic applications anywhere in the world. The beacon
be serviced on a regular basis to ensure a reliable seal. Remove can be installed on any submersible equipment with working
and lubricate at least once a year or sooner and replace ocean depths to 7,300 meters. A pressure sensitive switch in the
every two years or sooner. With regular maintenance, O-rings battery cap automatically turns the beacon OFF while
will be very reliable and trouble free. Most failures due to O- submerged below 10 meters and ON at 8 meters from the
rings are a direct result of improper maintenance and of surface. While submerged, the AS-900A does not draw any
subsequent operations at their design limits. current so it may be left submerged for up to 1 year.

There are two O-rings to service and a cup seal to service. The At the surface the beacon transmits an ARGOS position data
O-rings are at the top end of the Pressure Case and on the message for 30 days.
Pressure Switch. The cup seal is on the Pressure Switch.
Replace the two O-rings with Parker #218 or equivalent available
from Cobham Tracking & Locating or your local O-ring supplier.
Lubricate lightly with a silicone grease, we recommend Parker
Super O Lube. Instructions for the lubricating or replacing the
cup seal can be found in Section 6.4.

6.4 Pressure Switch Cup Seal

The Cup Seal must not be overlooked when lubricating the “O”
rings. The Cup Seal should be lubricated every year and
replaced every two years or sooner. Lightly lubricate the Cup
Seal by performing the procedure below.

10 3
(C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved (C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved
AS-900A Argos Beacon Operation & Maintenance Manual AS-900A Argos Beacon Operation & Maintenance Manual
March 2007 Version 3.0 March 2007 Version 3.0

3 Shipping Box Contents 6 Maintenance

The contents of the AS-900A shipping box are listed in Table 1.
This box is designed to protect the AS-900A during shipment to 6.1 Regular Maintenace
you. Please take the time to inspect the contents of the box
carefully. The shipping box should contain the following items • Rinse thoroughly with fresh water after every use
for each AS-900A:
• Always remove batteries when not in use

Table 1 - Contents of AS-900A Shipping Box • Always use fresh batteries

Qty Description • Protect “O” ring surface from damage

1 AS-900A • Replace worn or damaged “O” rings

1 Operation and Maintenance Manual
• Keep batteries and electronics dry
2 218 O-rings

2 AN-901 Antenna
6.2 O-Ring Facts
O-rings have a limited useful life; two to five years is a
Please ensure that all of the above items are included in the box conservative estimate. The main problem with O-rings is that
and that they have not been physically damaged during they become slightly flattened (“set”) resulting in less
shipment. Please report any missing or damaged items to compressibility. Reduced compressibility can lead to a water
Cobham Tracking & Locating immediately. leak near the surface. The best way to prevent a problem is to
service the O-rings on a regular basis and before every
It is a good idea to read this manual completely before beginning deployment.
the installation and operation of the AS-900A.
Some of the main factors that can cause a “set” are:

ƒ High storage temperature (exceeding 40 °C) over time will

cause the rubber to harden.
ƒ Exposure to sunlight and ozone will cause the O-ring to
deteriorate and stiffen.
ƒ Temperature does not have to be that cold for an O-ring to
lose a great deal of its flexibility. At 4 °C, an O-ring has
stiffened significantly.

4 9
(C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved (C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved
AS-900A Argos Beacon Operation & Maintenance Manual AS-900A Argos Beacon Operation & Maintenance Manual
March 2007 Version 3.0 March 2007 Version 3.0

5 Licensing Requirements 4 Operation

The AS-900A can not be used without a valid ARGOS service
agreement and valid ARGOS ID. The user is responsible for 4.1 Quick Start
contacting ARGOS to obtain the necessary permissions and IDs.
ARGOS can be contacted as follows: 1. The AS-900A is shipped with fresh batteries installed.
2. Check that the Pressure Switch is secure, turned clockwise
to finger tight. Also check that the antenna end of the
North America Europe Pressure Case is secure, turned clockwise to finger tight.
CLS America, Inc. CLS (Collecte, Localisation,
Satellites) 3. Install antenna on the stud on the top of the antenna base
1441 McCormick Drive, Suite 1050
and secure by turning clockwise to finger tight.
Largo, MD 20774 8-10, rue Hermès 4. Turn Pressure Switch knob to ON position.
Parc Technologique du Canal
USA 31526 Ramonville Saint-Agne
5. Using a CATs Meow or ARGOS uplink receiver (not
cedex included) verify transmissions and repetition rate. There will
Tel. +1-301-925-4411 be “beeps” from the CATs Meow.
Fax. +1-301-925-8995 France 6. Unit is ready for deployment.
www.clsamerica.ca Tel. +33 (0)5 61 39 47 20
Fax. +33 (0)5 61 39 47 97 4.2 Installation
www.cls.fr Various installation factors can affect the performance of the AS-
900A. Install the unit in a location that will ensure that at the
surface the antenna will be vertical and well out of the water.
Keep the whip antenna clear of metal obstructions. Nearby
metal can scatter or block some of the RF energy and reduce the
strength of the signal transmitted.

4.2.1 Antenna
The AS-900A is supplied with two ½ wave whip antenna, part no.
AN-901. Install one on the stud on the top of the antenna base
and secure finger tight only — do not use a wrench.

The ½ wave antenna has a critical small zinc anode attached

near its base to protect it from corrosion. Replace the antenna
when the zinc anode is wasted.

8 5
(C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved (C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved
AS-900A Argos Beacon Operation & Maintenance Manual AS-900A Argos Beacon Operation & Maintenance Manual
March 2007 Version 3.0 March 2007 Version 3.0

4.2.2 Pressure Case 4.2.5 Test Operation

When mounting the pressure case take care to prevent any side Prior deployment it is recommended that you test the AS-900A
loading on the Pressure Switch or the top end Delrin bulkhead with a receiver such as the Cobham Tracking & Locating CATs
cap. Over time, side loading on these parts can cause a leak. Meow.
Never attach anything to the two mounting screws on the
Pressure Switch Zinc anode. Turn the beacon ON and place the CATs Meow next to the
transmit antenna. When the beacon transmits a signal the CATs
To minimize corrosion never mount the pressure case to metal. Meow will beep. The transmissions should occur at the
Isolate the pressure case by wrapping it with vinyl tape at the repetition rate programmed into the unit at the factory from the
contact points. information provided (with a 10 second randomization). The
beacon may also be tested using an ARGOS uplink receiver that
is capable of decoding 20-bit and 28-bit IDs over the complete
4.2.3 Batteries ARGOS II band.

The AS-900A uses 4 Alkaline “C” cells for approximately 30 days To check operation of the pressure switch, turn the pressure
of operation at the surface. To replace the batteries remove the switch OFF, the signal should stop. This verifies the pressure
Pressure Switch and install fresh batteries with the positive switch is working properly, since the knob assembly actually
terminal towards the antenna. Rechargeable batteries are not presses against the pressure switch diaphragm just as seawater
recommended. Always remove and discard batteries when the would.
AS-900A is not in use.
CAUTION:
4.2.4 Turn On & Off Please note that any time the AS-900A is operated there is a
potential to incur ARGOS system charges. ARGOS satellites
A manual ON/OFF switch is incorporated in the Pressure Switch. can receive the signals transmitted by the AS-900A even from
To turn the Beacon ON or OFF, rotate the knob as shown in within an enclosed space, unless that space is a RF shielded
Figure 1. enclosure.
Prior to deployment or testing, check that the pressure switch is
secure by turning it fully clockwise, finger tight. FAILURE TO
SECURE PRESSURE SWITCH CAN RESULT IN A FLOODED
RADIO BEACON.

Figure 1 - PS-200 Label

6 7
(C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved (C) 2007 by Cobham Tracking & Locating Ltd, All Rights Reserved