0106804 b - Model 106 Current Meter - Operating Manual
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2019 – Valeport Ltd
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5.5.
O-Ring Sizes
Line connector
1 x 200-016-4470
Bulkhead connector pro-cap
1 x 200-016-4470
Bulkhead Connector/Housing
2 x 200-115-4470
End Cap, sensor end
1 x 200-128-4470 plus 1 x 128 anti-extrusion rings
Centre section/housings
2 x 200-129-4470 plus 2 x 129 anti-extrusion rings
Note that anti-extrusion backing rings are used on the sensor end O-rings and the O-rings should be placed
on the pressure [seawater] side of the anti-extrusion ring.
The Dowty seal used in the temperature sensor is type 303.
5.6.
Lithium Back UP Battery
The memory back-up lithium battery, (Type T047BA9, 3.6V), should be replaced at least every 5 years. If the
memory and or clock settings are lost then the battery should be replaced. It is recommended that the
instrument be returned to Valeport Limited for replacement of this battery, however if urgent renewal is
required then the replacement procedure is as follows:
The battery is housed within the battery/internal connection part of the housing.
1.
Remove the front battery housing section, as in Section 5.2 'Battery Replacement'.
2.
The battery is connected to board 0104502 by wire, but is situated within the main bulkhead. It is
therefore necessary to remove the board.
3.
Do this by removing the screws in the two PCB support bars. This should allow the board to be gently
removed, with the Lithium battery sliding out of the main bulkhead.
4.
Remove the heat shrink tube around the battery, and de-solder the old cell. Fit and solder the wires to
the new battery, and replace the heat shrink tube (19mm bore).
5.
Reassembly is a reversal of the above procedure. Before replacing the rear tube, check the condition of
the O-rings, which should be free of cuts or perishing. Also check the condition of the sealing bores of the
main tube which should be free of scratches. Finally smear a light coating of silicon grease on the O-rings
and rear tube sealing bores to aid refitting and subsequent removal.
