BELL-200 - Ocean Technology Systems
Contents
1. PTT GND SHORT TOGETHER FIGURE 4 Wiring of Headset Connector SECTION 4 COMPONENTS amp CONTROLS Refer to Figure 5 for an illustration of the components and controls of the BELL 200 1 Fuse select switch for main and spare fuses 6 Speaker 2 On off indicator LED 7 Power input jack 3 On off switch and volume control 8 Transducer jack 4 Transmit indicator LED 9 Headset output jack 5 Momentary toggle switch for push to talk 10 Vent transmit function 11 Front panel screws BELL 200 EMERGENCY COMMUNICATIONS BACK UP SYSTEM Manufactured by Ocean Technology Systems ANSA A FIGURE 5 Components and Controls of the BELL 200 SECTION 5 OPERATING INSTRUCTIONS The operation of the BELL 200 through water communication transceiver is rather simple The following steps are all that is required to operate the system We will assume that the unit has been installed the power connector is connected to the unit and to an adequate 24 volt power source and the transducer is properly in stalled and connected to the unit Refer to Figure 5 throughout these instructions for identification of the compo nents and controls of the BELL 200 system 1 Ensure that the transducer is clean free of grease or debris and submerged Never operat2. Bad trace on board Repair trace or replace board PTT logic circuits defective Repair trace or replace board Low battery voltage Charge or replace bell battery the BELL 200 has no internal battery Microphone pre amp Trace signal to find fault circuit defective and replace defective part Defective CPU chip Repair or replace board Power OK but cannot Defective CPU Replace CPU or board Transducer or cable Replace defective Defective PLL synthesizer Replace part or circuit board Defective components in modulator signal path Trace problem and replace part of circuit board Weak transmission Transducer ceramic cylinder fractured Replace transducer Transducer cable or connections faulty Repair bad connections or cable Microphone weak applies only to custom models with external microphone option Replace microphone Transducer not clean Clean transducer with denatured alcohol Transducer above thermoclines Operate transducer below thermoclines Distorted unintelligible speech Transmitting or receiving on the wrong channel Check channel jumpers on circuit board for weak or cold connection Undersea Systems International dba Ocean Technology Systems LIMITED WARRANTY The Aquacom BELL 200 is fully warranted against defects in materials and workmanship for a period of 1 year from t
3. Aquacom BELL 200 Bell Back Up System Installation amp Operation Guide 9 FUSE SPARE MAIN BELL 200 C gt AQUACOM EMERGENCY COMMUNICATIONS BACK UP SYSTEM fuu Manufactured by Ocean Technology Systems MADE IN USA W Technology in Depth NOTICE This manual and the information contained herein are provided for use as an in stallation and operation guide No license or rights to manufacture produce and or sell either the manual or articles described herein are given Undersea Systems International Inc dba Ocean Technology Systems reserves the right to change specifications without notice It is recommended that all users read and fully un derstand this manual before using the Aquacom BELL 200 All statements technical information and recommendations herein are based on tests we believe to be reliable but the accuracy or completeness thereof is not guaranteed and the following is made in lieu of all warranties expressed or im plied including the implied warranties of merchantability and fitness for purpose Seller s and Manufacturer s only obligation shall be to replace such quantity of the product proved to be defective Before using the product the user shall deter mine the suitability of the product for intended use and assumes all risk and liabil ity whatsoever in connection therewith Neither Seller nor Manufacturer shall be liable either in tort or in con
4. Oooc ri3d C A SES aci I L J vV SdWv OL vZ oa SNOISNAWIG 345 H3OnQGsNvulL HOLOSNNOO 195 _ NH3ll vd 3 1OH ONILNNOW H3On dasNvH Yarsdoers i HSONCSNVHL Jo neHLOO 12 S 939 98622 orz cm PN 7 T 1 4 P ai CER Y n2 x p is 1108 S mE 98610 v NO AIOVAS 98622 ATIWNDA MIYOS 02 4 10 V HOS 3ONVuVTIO FIGURE 1 Installation of the BELL 200 The THB BELL headset conveniently connects to the BELL 200 through the external headset jack see Fig 5 9 in Section 4 Its specifications including special impedances are matched to the requirements of the BELL 200 Awiring diagram showing the factory configured headset connections of the THB BELL headset is provided in Figure 4 TRANSDUCER 6 PIN MS CONNECTOR BLK SHLD XDUCERRTN A XDUCER RTN I N C A XDUCER SIG e 4 XDUCER SIG FIGURE 2 Wiring of the Transducer Connector 6 pin MS TRANSDUCER WHITE INPUT POWER 2 PIN MS CONNECTOR 24 0 A pe 24VDC 24VDC B pe 24VDC POWER CONNECTION SHOULD BE WITH 16 GAUGE WIRE FIGURE 3 Wiring for Power Input HEADSET 6 PIN MS CONNECTOR EAR GND BLACK EAR GND A B RED WHITE MOSG e SHLD HEADSET WITH BOOM MIC PTT F ke ome
5. BELL 200 is fairly simple A drawing Figure 1 is pro vided to assist the installation technician As shown in Figure 1 the unit is installed using the four holes provided in the lower portion of the enclosure Care must be exercised to ensure that cable dam age does not occur Do not separate the housing halves more than 4 inches Installation of the housing is achieved by passing the mounting bolt through the lower housing enclosure These bolts are then attached to a mounting plate that is secured to the diving bell The installation technician is at liberty to use any suit able method to install the electronics package The unit comes with a transducer cable assembly with an MS type connector A transducer with cable and no termination bare wires is provided to allow the technician the option of molding or splicing the cable to a bulkhead penetrator or connector A proper connection is critical Therefore the following information is provided to assist the technician 3 1 TRANSDUCER CONNECTION See Figure 2 for an illustration of the wiring for connecting the transducer The cable connections are as follows The white leads are connected together b The black leads and shields are connected together at the splice between the transducer cable and the transducer cable with the MS connector c Forthe MS connections pins A and B are shorted together and are connected to the black and shield of the transducer cable The other white c
6. able lead is connected to pins E and F Pins E and F also are shorted together 3 2 ELECTRICAL POWER The power required for the BELL 200 is 24 volts direct current at 10 amperes The unit will draw approximately 8 amperes peak during transmissions See Figure 3 for an illustration of the wire connections for power input The power input connections are as follows a 24 volt positive input on MS Connector on pin A b 24 volt negative input on MS Connector on pin B 3 3 HEADSET INSTALLATION For enhanced quality of communications with the BELL 200 Ocean Technology Systems offers as an accessory a dual earphone headset with a boom microphone 2 TENVd OINOHLOS1S SOV1daH ONISNOH NI H NOHHL 3OIOHO Hf1OA 30 S1708 ONILNNOW LH3SNI Z 1990 318v9 SHIM SIHONI v 108v NVHL SHOW ON S3ATVH ONISNOH a1vuvd3s OL LON SUNS ONDIVIA TANVd SOINOHLOS T3 SAOWSY L SN3HOS ONILNNOW SMAHOS ONILNNOW 3O3ld ONLLNNOW 3 nH 7738 E a HOLVHLINEd HO P it WOO3NNOO f Ceivi3a 3 1OH ONLLNNOW 339 H3OncSNveL LEMOWHE NO Q31NnOA HSONGSNVEL 4 9 3 SNid SLIHM 8 V SNid 913155 9 E3OnOSNVUL 1HOd H3H1vduti 5 e waisis anova 1 woovnov COS E NC
7. ce thermal gradients Refer to the STX 101SB manual for more information on the theory of operation 7 SECTION 7 TROUBLESHOOTING GUIDE Problem Probable Cause Remedy No power No receive signal External power failure Repair external power fault Power connector loose Reconnect connector Defective on off power switch Replace switch volume control assembly Open circuit on board Repair or replace board Open fuse Loose leads from transducer connector Switch to spare via panel switch Check and repair Transducer is not clean or not submerged Ensure transducer is clean and fully submerged in the water Board connectors loose Clean pins and reconnect Defective transducer Replace transducer Defective transceiver on off switch Replace switch Defective volume control Replace control Transmitter inoperative cont Transceiver board defective Replace board Transducer is not clean or not submerged Ensure transducer is clean and fully submerged in the water No audio from Replace microphone or microphone headset when using hand held microphone or headset Microphone signal path Trace open connection disrupted on board repair or replace Problem Probable Cause Remedy cont Board connectors not making contact Clean pins or replace defective connector
8. deep helium speech communications are to be successful The special STX 101SB surface unit employs a means to record the diver This facility can be used to connect a helium unscrambler Normally the helium unscrambler is connected to the bell intercom system This connection provides a more ideal signal for the unscrambler Unfortunately although the BELL 200 is capable of transmitting helium speech and the modified STX 101SB is capable of receiving this speech there can be some problems These problems are the result of some pitch pulse unscramblers that cannot tolerate noise pulses within the speech signal These unscramblers treat these noise pulses like speech pitch pulses and therefore the unscrambler is fooled into processing this noise Some of the more modern unscramblers that use Digital Signal Processing DSP techniques are more likely to provide acceptable results in a noisy acoustic environment Usually the emergency Bell Communication System is operated in an ocean environment that is away from areas producing high levels of biological acoustic noise Most acoustic noise will probably be generated near the surface Because of this possibility of near surface noise as well as acoustical problems presented by thermoclines we recommend that the surface unit transducer be lowered as deep as possible This practice places the transducer farther away from surface noise and closer to or below some of the near surfa
9. e BELL 200 unit see Section 3 3 Headset Installation via the 6 pin MS connector Fig 6 2 Once the headset is plugged in all communication is through the headset the speaker on the BELL 200 will no longer function for reception and transmission The THB BELL headset features a noise canceling boom microphone 1 and dual earphones 3 for clear communications To transmit simply press the push to talk PTT switch 4 and speak clearly into the microphone Note The microphone is noise canceling so it should be positioned as close to your lips as possible without hindering speech Contact OTS or your local OTS dealer to inquire about the THB BELL headset 5 2 OPERATION OF HSM 10 HAND HELD MICROPHONE For users that do not need the full functionality of a headset but still prefer to use an external microphone with the BELL 200 OTS offers the HSM 10 hand held microphone The HSM 10 plugs into the headset jack of the BELL 200 disabling the microphone function of the speaker minimizing environmental noise to allow clearer transmission Simply press the PTT button on the HSM 10 to transmit Contact OTS or your local OTS dealer to inquire about the HSM 10 microphone 6 Key 1 Microphone 2 6 pin MS connector 3 Earcup 4 PTT button FIGURE 6 THB BELL Eo a Headset Configuration SECTION 6 SPECIAL CONSIDERATIONS The environment in which the BELL 200 transceiver is operated poses some special needs if
10. e the system without the transducer submerged Damage to the transducer and or transceiver may occur Note The transducer may be cleaned with denatured alcohol Do not use solvent type cleaners 2 Rotate the on off volume control 3 clockwise Verify that the red LED 2 illuminates and that you hear static or hash noise from the speaker 6 3 Have the surface transceiver operator transmit to the BELL 200 Verify that this transmission has been received 4 Depress the push to talk switch 5 and communicate with the surface station Speak directly into the panel speaker 6 within about 6 to 12 inches When operating at deeper depths it is important that the operator speak loudly close to the panel speaker because helium derived speech does not have as much amplitude volume as speech generated in a normal air environment The BELL 200 transmit power level is directly proportional to the amplitude of the operator s speech to a maximum output of 50 watts 5 Allusers involved should verify receipt and transmission ofthe communications 5 1 OPERATION OF THB BELL HEADSET Refer to Figure 6 for an illustration of the headset components and controls mentioned in these instructions The THB BELL headset as illustrated in Figure 6 is an accessory item for the BELL 200 bell back up system Its use enhances communications by helping to isolate both transmission and reception from external interference The headset plugs into th
11. he time of purchase Our obligation under this warranty is lim ited to the replacement of any part or parts that prove to our satisfaction to have been defective and that have not been misused or carelessly handled Labor is warranted for 1 year from the time of purchase The complete unit and or part must be returned to our factory transportation charged prepaid We reserve the right to decline responsibility where repairs have been made or attempted by other than an Ocean Technology Systems factory trained service center or properly trained per sonnel In no event shall Ocean Technology Systems be li able for consequential damages 3133 W Harvard Street Santa Ana CA 92704 USA Toll free 800 550 1984 Tel 714 754 7848 Fax 714 966 1639 E mail ots oceantechnologysystems com Web www oceantechnologysystems com O Copyright 2001 2006 by Ocean Technology Systems All rights reserved 10
12. l Considerations esses 7 Section 7 Troubleshooting Guide see 8 Limited Warranty te geret e eet D Hor e ede tte gere Ren 10 SECTION 1 INTRODUCTION Congratulations You have just purchased the finest state of the art bell back up system in the world The BELL 200 is a single sideband through water acoustic telephone designed as an emergency communications system for the diving bell or hardwire communications failure The system consists ofa transceiver module and an acoustic transducer The trans ceiver is mounted internally on a suitable bracket The transducer is mounted on the outside of the bell on top The cable is routed through an approved hull con nector not supplied or customer furnished penetrator The method of transmission is state of the art suppressed carrier single sideband using the upper sideband This manual is a comprehensive handbook for the BELL 200 providing specifi cations installation instructions operating instructions special considerations a troubleshooting guide and warranty information SECTION 2 SPECIFICATIONS Power output 70 watts PEP peak envelope power Frequency 25 kHz although other frequencies are available Housing material Diecast aluminum 1 12 powder coated per Fed STD 26357 semi gloss gray Size Height 3 54 inches width 4 72 inches depth 8 66 inches SECTION 3 INSTALLATION INSTRUCTIONS The installation of the
13. tract for any loss or damage direct incidental or consequential arising from the use of or the inability to use the product No statement or recommendation not contained herein shall have any force or effect unless it is in an agreement signed by officers of the Seller and Manufacturer IMPORTANT SAFETY NOTICE Please read before using product It is absolutely essential that all operators are properly trained and equipped and fully understand this user s manual before attempting to use the Aquacom BELL 200 Refer to the Library page of our Web site www oceantechnologysytems com for a list of any changes made to this manual since its publication Copyright 2001 2006 by Ocean Technology Systems All rights reserved Specifications are subject to change without prior notice 506070 000 C TABLE OF CONTENTS Section 1 Introduction be Perte ere ts 1 Section 2 Specifications 1 Section 3 Installation Instructions sese 2 351 Transd cer Connections hende ee 2 3 2 Electrical Power nennen 2 3 3 Headset Installation 2 Section 4 Components amp Controls sssssseeeeeeeeeenennne 4 Section 5 Operating Instructions 5 5 1 Operation of THB BELL Headset sse 6 5 2 Operation of HSM 10 Hand Held 6 Section 6 Specia
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