Model 865-A Deep Sea Acoustic Release/Transponder M-855-009
Benthos, Inc.
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4.4 Recovery...............................................................................................................15
5.0 HARDWARE DESCRIPTION..........................................................................16
5.1 Mechanical Parts....................................................................................................16
5.1.1 Housing .................................................................................................................16
5.1.2 End Cap Assembly ................................................................................................16
5.2 Electrical Parts.......................................................................................................18
5.2.1 Battery Packs ........................................................................................................18
5.2.2 Electronics Chassis Assembly.................................................................................18
5.2.2.1 865-A Board No. 1...............................................................................................18
5.2.2.2 865-A Board No. 2...............................................................................................21
6.0 THEORY OF OPERATION ..............................................................................21
6.1 Receiver ................................................................................................................21
6.2 Command Theory..................................................................................................22
6.2.1 Command Release.................................................................................................22
6.3 Transmitter.............................................................................................................22
6.3.2 Backup Timer Feature............................................................................................23
6.4 Tilt Theory.............................................................................................................24
7.0 CHANGING THE RELEASE SETUP ..............................................................24
7.1 Changing The Command Assignments ....................................................................25
7.2 Changing The Transmit Frequency..........................................................................25
7.3 Changing The Enable Time .....................................................................................26
7.4 Changing the Backup Timer....................................................................................26
7.5 Enabling And Disabling The Tilt Function (on initial power up).................................26
8.0 MAINTENANCE ...............................................................................................27
8.1 Step-by-Step Turnaround Procedure for the 865-A................................................27
8.2 865-A Turnaround Checklist..................................................................................32
8.3 Preventative ...........................................................................................................33
8.4 Replacing the Sealing Rings ....................................................................................33
8.4.1 End Cap to Housing Seals......................................................................................33
8.4.2 End Cap Rotary Switch Shaft Seals........................................................................33
8.4.3 Release Pin Seals ...................................................................................................34
8.5 Battery Pack Replacement .....................................................................................35
9.0 TROUBLESHOOTING.....................................................................................35
10.0 DRAWINGS AND SPARE PARTS LISTS ......................................................37
APPENDICES
Application Note 210-003, Alkaline Batteries
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