ONLINE ELECTRONICS LTD
2405_5001_A01
Page 13 of 14
8.
Ensure that the 2405 is turned OFF before disconnecting the battery. The rubber battery
cover is simply pulled over the battery guides. Replace the battery and ensure all wires are
installed neatly and protected from accidental damage.
9.
Examine the 2405 O-ring seals for any signs of damage or contamination. Replace if
necessary.
10.
Reassemble the system following the above instructions in reverse. Remember to tighten
the bleedscrew on the rear of the 2405 once the housing has been closed.
11.
Do not use spanners to tighten any of the connector collars otherwise damage may occur.
The collars should be hand tightened only. Grease the connectors with a suitable grease if
necessary.
12.
Note that the DGO connectors at the 2401
hydrophone include an internal O-ring and BUR
(Back Up Ring) positioned as shown. Look into
each half of the connector and confirm that the
O-ring and BUR are in position and are
undamaged. If these seals are missing or
damaged then the system may malfunction when
deployed subsea.
4.2.
2405 O-RING REPLACEMENT
The 2405 uses the following O-rings:
1x 50-008 groove in piston bleedscrew O-ring.
2x 50-243 groove in piston endcap O-rings with 2x 250-243 PTFE Back Up Rings.
1x 50-236 groove in flange window O-ring / 1x 50-237 groove in piston window O-ring.
4.3.
ROUTINE MAINTENANCE AND STORAGE
All Online Electronics Ltd products are designed to require minimum maintenance. The housing
should be cleaned using fresh water and cleaning agents as necessary. Do not use chemicals
which could be damaging to the housing, the nitrile rubber O-rings, the acrylic window, or any
connectors.
If the unit is to be placed in storage for a long period of time ensure the unit has been cleaned
and disconnect the main battery.
