Online 2405 Operating Manual
ONLINE ELECTRONICS LTD
2405_5001_A01 Page 1 of 14
Online Electronics Ltd
Online House
Blackburn Business Park
Woodburn Road, Blackburn
Aberdeen
AB21 0PS
UK
+44 (0)1224 714 714
www.online-electronics.com
sales@online-electronics.com
ACOUSTIC RECEIVER
SELF-CONTAINED ROV HELD
OPERATING MANUAL
The 2405 is a standalone, battery powered, acoustic
receiver system which can be used by an ROV for
tracking and locating underwater acoustic pingers
ONLINE ELECTRONICS LTD
2405_5001_A01 Page 2 of 14
2405_5001
Checked
(IF APPLICABLE)
Date
(IF APPLICABLE)
Approved
Date
Rev
Date
By
Summary of change
A00
11/08/17
BG
CR00485: Was 2405 ROV ACOUSTIC RECEIVER MANUAL RevA12.
CR00380: Address change. CR00499: Front cover update.
A01
06/10/17
BG
CR00499: Cover page update
COMMENTS:
ONLINE ELECTRONICS LTD
2405_5001_A01 Page 3 of 14
CONTENTS Page
1. GENERAL DESCRIPTION ......................................................................................... 4
2. SPECIFICATIONS ................................................................................................... 5
3. OPERATION .......................................................................................................... 6
3.1. SELF TEST ........................................................................................................ 7
3.2. FUNCTION TEST ................................................................................................ 7
3.3. TURNING ON ..................................................................................................... 8
3.4. OPERATING SCREEN .......................................................................................... 9
3.5. SINGLE BUTTON MENU INTERFACE .................................................................... 10
3.5.1. EXIT........................................................................................................... 10
3.5.2. MANUAL MODE / AGC MODE ......................................................................... 10
3.5.3. SET TIME / DATE ......................................................................................... 10
3.5.4. LEDS ON / LEDS OFF .................................................................................... 11
3.5.5. CONFIGURE ................................................................................................ 11
3.5.6. SHUTDOWN ................................................................................................ 11
4. MAINTENANCE .................................................................................................... 12
4.1. BATTERY REPLACEMENT ................................................................................... 12
4.2. 2405 O-RING REPLACEMENT ............................................................................. 13
4.3. ROUTINE MAINTENANCE AND STORAGE ............................................................. 13
5. DISPOSAL OF UNIT .............................................................................................. 14
6. WARRANTY ......................................................................................................... 14
ONLINE ELECTRONICS LTD
2405_5001_A01 Page 4 of 14
1. GENERAL DESCRIPTION
The 2405 Acoustic Receiver system is a standalone, battery powered, acoustic receiver
system, tuneable to all frequencies between 8 kHz and 50 kHz which can be used by an ROV
for tracking and locating underwater acoustic transmitters. The system consists of a 2405 unit
and 2401 directional hydrophone.
Acoustic signals are displayed as they are received by the 2405 unit on a 2.7” graphical
display and three high brightness LEDs positioned below the display. The 2405 system
requires no interface other than an ROV camera to observe the received signals on the display.
The user can turn the unit ON and OFF as well as modify several settings using a single control
button and intuitive menu system on the 2405 unit.
The directional sensitivity of the 2401 hydrophone allows the operator to locate acoustic
transmitters by observing the signal level received and the relative orientation of the 2401
hydrophone.
ONLINE ELECTRONICS LTD
2405_5001_A01 Page 5 of 14
2. SPECIFICATIONS
Battery life at 5°C ............................................................................................. 130 hours
Battery type ..................................................................... 10.5V Alkaline pack BATT-11210
Operating temperature range ........................................................................ -2°C to +35°C
Storage temperature range ......................................................................... -20°C to +50°C
Frame material................................................................................................ALUMINIUM
Fishtail material .............................................................................. 316 STAINLESS STEEL
Fishtail bracket material ................................................................... 316 STAINLESS STEEL
2405 Housing material ....................................................... ALLOY BRONZE CA104 EN 12163
2405 Endcap material ........................................................ ALLOY BRONZE CA104 EN 12163
2405 Bleedscrew material ................................................... ALLOY BRONZE CA104 EN 12163
2405 Window material ......................................................................................... ACRYLIC
2405 Endcap O-rings ................................. 2x BS 50-243 NBR70 with 2x 250-243 PTFE BURs
2405 Window O-rings ....................................... 1x BS 50-236 NBR70 / 1x BS 50-237 NBR70
2405 Bleedscrew O-ring ..................................................................... 1x BS 50-008 NBR70
DGO Connector O-ring ....................................................................... 1x BS 50-013 NBR70
System Weight in air................................................................................................. 28kg
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