Instruction manual, SPT and MPT 31x series transponders

SPT and MPT 31x series
Remember to mark the wires.
4 Remove the electronic chassis (not necessary on the EEx
transponders).
5 Remove the transducer:
The EEx models have 6 securing screws.
The /L -St and /DT -St have 2 securing screws.
6 Assembly is basically the reverse of opening.
How to remove the bottom end cap / release unit
Note
This paragraph applies only to the aluminium transponders.
When fitted, the release mechanism forms the bottom end cap of
the pressure housing. Removing a standard end cap or a release
unit is basically the same. The end cap is sealed into the
transponder housing. The procedure describes how to remove
the release unit:
1 Hold the transponder body securely, and agitate the
release unit back and forth in the housing to break the seal.
2 Pull the release unit out. The unit should seal tightly into
the housing, so some force will be required to withdraw it.
Note
A 1,3 m length of cable is connected between the release unit
and the battery pack. Ensure this cable is not damaged when
withdrawing the unit.
Note
DO NOT attempt to “unscrew” the unit from the housing as the
internal wiring and circuitry can be damaged.
Note
DO NOT use a screw-driver or similar tool in an attempt to
lever the unit out. This will damage the sealing surfaces
resulting in water ingress.
How to assemble a transponder
To replace the electronics chassis and battery pack into the
housing, follow the procedure below:
78 160820/O