GME MT400 User manual

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EPIRB
Leak Test Kit
406/121.5 MHz EPIRB
INSTRUCTION MANUAL
MT400 / MT600 Series

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CONTENTS
OVERVIEW...............................................................................................................................3
Applicability.....................................................................................................................3
Components.....................................................................................................................3
OPERATOR PREPARATION ........................................................................................................3
Training............................................................................................................................3
Environment and PPE .......................................................................................................3
CARE AND MAINTENANCE OF THE EQUIPMENT.......................................................................4
Assembly procedure.........................................................................................................4
Maintenance ....................................................................................................................4
EPIRB TEST PROCEDURE...........................................................................................................4
Preparation ......................................................................................................................4
Performing a leak test ......................................................................................................4
MT400DTK SERIES EPIRB TEST SETUP.......................................................................................5

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OVERVIEW
The MT400DTK leak test kit is a critical component used to test a GME EPIRB after a battery
replacement, or if the EPIRB has been opened for any reason. It tests whether the EPIRB is
airtight and by implication, watertight. It will reveal cracks in the components and defects in the
O-ring gasket seals.
It is critical to perform this test prior to returning an EPIRB to service to ensure water will not
enter it.
APPLICABILITY
This leak test kit can be used with MT403, MT403FF, MT403G, MT403FG, MT600, MT600G,
MT603G and MT603FG models
COMPONENTS
MT400DTK comprises the following:
• Cradle with air coupling and with feature to disable water activation for relevant models
• Air regulator with gauge and slide valve
• One metre of 6 mm air line
To use the MT400DTK, you will require the following additional hardware:
• Air compressor capable of supplying 1.0 bar (≈15 psi or 100 kPa)
• Inline air drier fitted to the compressed air supply line
• Airline connection, both male and female fittings (male with G1/4 internal thread to suit
adaptor on slide valve)
• Suitable flexible airline from compressed air supply to MT400DTK
• Suitable transparent water tank that will allow complete submersion of the beacon in the
required orientation
• A location in which to mount the supplied air regulator/slide valve
OPERATOR PREPARATION
TRAINING
There are no specific training requirements for this equipment.
The operator carrying out the leak test must have read and understood all the procedures
and must be acutely aware of the importance of the tasks. Failure to carry out the service in
accordance with the instructions may result in an EPIRB failing to operate when the owner
attempts to deploy it.
The operator must understand the risk of over pressurising the EPIRB during the test. It is
important that PPE be worn at all times during the procedure.
ENVIRONMENT AND PPE
Compressed air is used with this equipment. Although it is normally only at 1 bar (100 kPa),
there is some danger of over pressurising the EPIRB and operators should consider what
personal protective equipment to wear. Suggestions include work gloves, safety glasses and a
face shield.

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CARE AND MAINTENANCE OF THE EQUIPMENT
ASSEMBLY PROCEDURE
The illustration on page 6 may be helpful.
1. Visually inspect all parts for damage prior to assembling the MT400DTK.
2. Attach a suitable airline fitting to the hand slide valve end and mount the air regulator/valve
in an upright position.
3. Fit one end of the blue air line into the push connector on the regulator, and the other end
over the barbed fitting located on the end of the air coupling.
4. Ensure that the hand slide valve is in the off position (blue slider pushed away from the
regulator).
5. Connect a compressed air supply to the air line.
6. Adjust the regulator knob by turning it anti-clockwise so that the pressure will be 0 psi at
first. This will avoid over pressurizing the EPIRB bottle during the test.
MAINTENANCE
The illustration on page 5 may be helpful.
• After use, dry the parts of the test kit.
• Regularly inspect the parts of the leak test kit for visible signs of deterioration.
• In particular, check the O ring on the end of the air coupling for wear and/or damage.
Replace it if necessary.
EPIRB TEST PROCEDURE
PREPARATION
You will need a water tank, preferably with transparent sides, large enough to contain the
EPIRB, in the cradle, with the air hose attached and not bent too sharply.
1. Fill the tank with fresh water sufficient to cover the EPIRB.
You may find it convenient, once you find a suitable water level, to make a water level mark
on the tank without an EPIRB.
2. Ensure that the water is free from contamination by visual inspection. Replace the water
when it is no longer clear.
PERFORMING A LEAK TEST
The illustration on page 5 may be helpful.
1. Ensure that you wear appropriate PPE. See Environment and PPE on page 3.
2. Pull back the air coupling against the spring and rotate it approximately 90° in either
direction to lock it into position.
You are now ready to insert the EPIRB unit under test (UUT).
3. Insert the EPIRB into the cradle as per normal operation.
4. Pull back the air coupling slightly and rotate it back to the original position to unlock it.
Then slowly allow the spring to push the coupling against the EPIRB, such that the tip gently
engages into the EPIRB test point.
5. Ensure the O ring is pressed up firmly against the EPIRB cap in order to create an airtight
seal.
6. Set the regulator pressure to 1.0 bar (100 kPa or approximately 15 psi) by adjusting the blue
control knob on the top of the regulator.
Note that too much pressure in the EPIRB could damage it and render it inoperable. Should
it explode, it can result in injury to persons and damage to other property.

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7. Using the slide valve, turn the air supply on.
8. If you can hear air escaping from near the O-ring, check that the EPIRB is seated correctly in
the cradle and ensure that the O ring is making a good contact.
If you can hear air escaping from the EPIRB, it fails the leak test.
9. Leak test the beacon as detailed in the Technical Service Manual (part # 310433).
10. On completion of the inspection, remove the EPIRB and cradle from the water.
11. Turn off and disconnect the air supply.
12. Making sure that water does not enter the EPIRB through the test point, retract the air
coupling and lock it into place.
13. Remove the EPIRB from the cradle.
MT400DTK SERIES EPIRB TEST SETUP
Air regulator with gauge
Compressed air line
Hand slide valve
Air line
Air coupling
O-ring at the tip
of the air coupling
Leak test cradle

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NOTES

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Part No: 310463 Drawing No: 44669-2
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