Amron 8895-AMP-8 Manuale utente

User Manual

for

Amron International Diving Supply, Inc.

Model 8895-AMP-8

Model 8895-AMP-16

Entertainment Amplifier

S/N__________________

This manual and the information contained herein are provided for use as an operation

and maintenance guide. No license or rights to manufacture, reproduce, or sell either the

manual or articles described herein are given. Amron International Diving Supply, Inc.

reserves the right to change specifications without notice.

Amron International Diving Supply, Inc

1380 Aspen Way, Vista, California 92081 U.S.A

Phone (760) 208-6500 Fax (760) 599-3857

Email: [email protected]

Web : www.amronintl.com

Revised October 2010

TABLE OF CONTENTS

SECTION

Specifications 1

Electrical .......................................................................................................................1.1

Power............................................................................................................................1.2

Mechanical....................................................................................................................1.3

Size...............................................................................................................................1.4

General Information 2

General Information ......................................................................................................2.1

Figure 1 Picture 8895-AMP-8........................................................................................2.2

Figure 2 Picture 8895-AMP-8 (rear)..............................................................................2.3

Options and Accessories 3

Accessories...................................................................................................................3.1

Warranty and Service Policy 4

Limited Warranty...........................................................................................................4.1

Service Policy................................................................................................................4.2

Controls and Connections 5

Controls and Connections ............................................................................................5.1

Installation and Operation 6

Operation ......................................................................................................................6.1

Installation.....................................................................................................................6.2

Theory of Operation 7

Theory of Operation......................................................................................................7.1

Functional Block Diagram.............................................................................................7.2

TABLE OF CONTENTS

Maintenance 8

Periodic Tests and Checks ...........................................................................................8.1

Drawings and Schematics 9

General .........................................................................................................................9.1

Schematic, Model 8895-AMP-8 ....................................................................................9.2

Schematic, Model 8895-AMP-16 ..................................................................................9.3

Schematic, Audio 1 & 2 8895-200 PC Card..................................................................9.4

Schematic, Audio 3 & 4 8895-200 PC Card..................................................................9.5

Schematic, Audio 5 & 6 8895-200 PC Card..................................................................9.6

Schematic, Audio 7 & 8 8895-200 PC Card..................................................................9.7

Schematic, Input Audio & Power 8895-200 PC Card....................................................9.8

System Interconnect Diagram Model 8895...................................................................9.9

Cable Assembly Model 8895-600...............................................................................9.10

Outside Junction Box Diagram Model 8895-700.........................................................9.11

Inside Junction Box Diagram Model 8895-800 ...........................................................9.12

Parts Identifier, Models 8895-AMP-8 & -16, Front......................................................9.13

Parts Identifier, Model 8895-AMP-8, Back..................................................................9.14

Parts Identifier, Model 8895-AMP-16, Back................................................................9.15

Outside Junction Box Model 8895-700.......................................................................9.16

Parts Identifier, Model 8895-700.................................................................................9.17

Inside Junction Box Model 8895-800..........................................................................9.18

Parts Identifier, Model 8895-800.................................................................................9.19

Parts List 10

General .......................................................................................................................10.1

Model 8895-AMP-8, Top Assembly ............................................................................10.2

Model 8895-AMP-16, Top Assembly ..........................................................................10.3

Model 8895-005, Pneumatic Headset for O2 Hood....................................................10.4

Model 8895-100, Patient Entertainment Set...............................................................10.5

Model 8895-600, Cable Assembly, 20 Foot Length....................................................10.6

Model 8895-700, Junction Box, Outside.....................................................................10.7

Model 8895-800, Junction Box, Inside........................................................................10.8

Model 8895-8-500, Chassis & Rear Panel Assembly.................................................10.9

Model 8895-16-500, Chassis & Rear Panel Assembly.............................................10.10

Model 8895-200A, PC Card Assembly .....................................................................10.11

SPECIFICATIONS

ELECTRICAL 1.1

Input Channels.....................................................................................................4 Stereo

Input Impedance (Each Input)...........................................................................600 Ohms

Frequency Response.............................................................................100 hz To 30 khz

Sensitivity (Input).......................................................................................................1 mV

Output Channels..............................................................................................................8

Output Power per Channel (RMS @ 8 Ohm Load).............................................. ¼ Watts

Output Impedance............................................................................... Less Than 8 Ohms

POWER 1.2

A. C. Power............................................................................ 115/220 Volts AC 50/60 Hz

Isolation Transformer.............................................................Split Bobbin Medical Grade

MECHANICAL 1.3

Enclosure ............................................................................... Black Anodized Aluminum

SIZE 1.4

Length...................................................................................................13.0 IN. (33.0 cm)

Width.....................................................................................................17.0 IN. (43.2 cm)

Height........................................................................................................3.5 IN. (8.9 cm)

Weight.....................................................................................................7.3 LBS. (3.3 kg)

GENERAL INFORMATION

GENERAL INFORMATION 2.1

The Model 8895-AMP-8 & 8895-AMP-16 Entertainment Amplifiers are four-channel audio

amplifiers designed to provide entertainment audio to patients within a hyperbaric chamber

environment. The amplifier is one part of a complete system to provide entertainment audio.

Amron has all the components available to build a complete system, including cables.

Patients wear a pneumatic headset (the same type as used by the airline industry) to provide

audio entertainment for passengers. This configuration was selected so that the patients could

use the headset while receiving oxygen treatment and still safely have audio entertainment. No

electrical energy is present at the headset. Volume level is adjustable by each patient, and each

patient has channel selection control. Up to four audio selections can be provided.

The patient headset is driven by a patient entertainment module which converts the electrical

signal to a sound pressure wave to drive the pneumatic headset. The audio transducer is isolated

from the pneumatic headset via a diaphragm. The electrical signal to the patient entertainment

module is a low voltage/low wattage signal, typically one watt with a maximum voltage of 12 VDC.

A volume control is provided as part of the headset tubing, allowing each patient to adjust their

listening level.

Each patient entertainment module has channel selection capabilities. A push-button switch

allows the patient to step through up to four different selections of audio. Again, in keeping with

the safety issues of a chamber environment, the electrical switching is done with low voltage

current, limited logic level signals. Up to eight patient entertainment modules can be driven by the

8895-AMP-8 and sixteen can be driven by the 8895-AMP-16.

A 110/220 volt selector switch is located on the rear of both the Model 8895-AMP-8 & 8895-AMP-

16. Select the desired voltage by turning the sector switch with a small slotted screwdriver.

GENERAL INFORMATION

PICTURE OF THE MODEL 8895-AMP-8 2.2

GENERAL INFORMATION

PICTURE OF THE MODEL 8895-AMP-8 (rear) 2.3

OPTIONS

ACCESSORIES 3.1

Model 8895-005

Pneumatic Headset has dual ear muffs with male Q.D.

Model 8895-100

Patient Entertainment Set contains audio sound transducer and channel selector switch.

Comes complete with 20 foot electrical hookup cable, 5 ½ foot sound tubing (includes

volume control and female Q. D.)

Model 8895-600

Cable Assembly connects amplifier 8895-AMP-8 to outside junction box on chamber.

Handles audio and channel selection signals for up to 8 patient entertainment modules.

Two cable assemblies required for the 8895-AMP-16 amplifier unit. Cable Assembly is 20

feet long, other lengths available on special order.

Model 8895-700

Outside Junction Box has connector to mate with 8895-600 cable assembly and an

electrical penetrator (20 conductor, ¾” Male NPT) to mount to chamber. Unit is pre-

assembled and tested, ready to screw into the chamber penetrator.

Model 8895-800

Inside Junction Box has male adapter busing to mount to chamber penetrator (3/4” Male

NPT) and terminal boards to attach electrical feed-thru wires from 8895-700. Two cable

grommets protect the cables from the patient entertainment modules as they enter the

junction box. Entertainment modules are wired to the terminal boards to complete the

installation.

WARRANTY AND SERVICE POLICY

LIMITED WARRANTY 4.1

AMRON INTERNATIONAL DIVING SUPPLY, INC. warrants that its products are free from

defects in material and workmanship under normal use and service (as described in AMRON

INTERNATIONAL DIVING SUPPLY, Inc. literature covering this product) for a period of 90 days

from date of shipment. Amron's obligation under this warranty is limited to the repair or

replacement of defective material at AMRON'S option. This warranty shall not cover defects which

are the result of misuse, negligence, accident, repair or alterations.

SERVICE POLICY 4.2

AMRON INTERNATIONAL encourages owners of equipment to call (760) 208-6500 for

assistance if problems are encountered. Every effort will be made to assist in solving your

problem. Equipment which must be returned to the factory for repairs should be safely packaged,

insured, and shipped prepaid to:

Amron International, Inc.

1380 Aspen Way

Vista, CA 92081

Be sure to include the following information:

Your Name

Your Company Name

Shipping Address

Phone Number

Contact Name

A short description of the problem is most helpful.

Valid in warranty repairs will be made at no charge. Out of warranty repairs will be handled in the

same fashion, except you will be advised of the repair charges before any work is done.

INSTALLATION & OPERATION

OPERATION 6.1

Turn power on and confirm power is on by observing the power on indicator. Make sure all

sources of audio are on and operating properly.

On initial set up, set all volume controls on the source devices to minimum and all front panel

volume controls to mid scale. Use one of the headsets within the chamber, making sure the

volume control valve on the sound tubing is full “ON”. Slowly advance source “A” while listening to

the headset within the chamber. Cycle the source selector switch to locate the presence of audio

and confirm the operation of the system.

Set the volume level for source “A” for a comfortable level on the headset in the chamber. Repeat

this procedure for source “B”, being sure to first advance the channel selector one step. After

setting channel “B”, repeat this procedure for channels “C” & “D”. If you are not going to have four

sources of audio material, you can leave a channel open (nothing connected) or you can put the

same material on multiple channels using a “Y” cable available from any retailer selling audio

equipment (female jack to two male jacks).

Once the volume levels are set for the four channels, note the position of the volume controls on

the source equipment.

The volume controls on the front panel adjust the range of audio levels which the amplifier will

accommodate. If you have a source of material which has a low output you can increase the

sensitivity of that channel without affecting the other channels.

The master volume (MV) controls the output of the amplifier and adjusts the volume level to all

patient entertainment modules.

Once a proper level is achieved no further adjustment should be necessary.

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