Instruction manual, SPT and MPT 31x series transponders

Maintenance
Before any connectors are disconnected, ensure the
surrounding areas are dry.
Inspect the unit for damage at regular intervals. Pay
particular attention to the transducer surface. This is
manufactured of a synthetic rubber material, and can be
damaged easily.
Maintenance for explosion-protected units
Testing the transponder
Explosion -protected electronic units must be subjects to regular
safety check and maintenance. The time interval of these tests is
depending on the operational and ambient conditions.
Flameproof units are protected against penetration of water to a
certain extent, due to the joints. Therefore, special attention must
be paid to the penetration of water in the unit.
A transponder may be tested for short periods on deck.
Refer to page 41 for information on how to test a
transponder.
Caution
Continuous operation in air may cause the unit to
overheat.
How to open a transponder
This section includes separate procedures for:
Aluminium transponders
Stainless steel transponders
Before you open a unit:
1 Wash the unit thoroughly in fresh water, and dry off any
moisture on the outside.
2 Place the transponder horizontally on a flat, clean workbench,
and support it so it cannot roll off.
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