Furuno 42A12D OPERATORS MANUAL

TECHNICAL MANUAL

ULTRASONIC TEST SET

MODEL 42A12D

JUNE 15, 1998

REV 00

SEACOM DIVISION

DUKANE CORPORATION ST. CHARLES, ILLINOIS 60174 PHONE: [phone] FAX: [phone]

DOCUMENT NO. 03-TM-0038  1998 DUKANE CORPORATION 199806-08SC

03-TM-0038 REV 00 PAGE i of i

Table Of Contents

SECTION

I General Information.......................................................................................................

1.1. Introduction....................................................................................................

1.1.1. General.............................................................................................

1.1.2. Symbols and Abbreviations...........................................................

1.2. General Description........................................................................................

1.2.1. Function...........................................................................................

1.2.2. Specifications...................................................................................

1.2.3. Block Diagram.................................................................................

1.3. Auxiliary Connections and Uses....................................................................

1.3.1. Audio Output....................................................................................

II Operation.....................................................................................................................

2.1. Operation........................................................................................................

III Maintenance...............................................................................................................

3.1. Battery Life.....................................................................................................

3.2. Battery Replacement.......................................................................................

3.3. Test Set Tuning..............................................................................................

3.3.1. Test Equipment..............................................................................

3.3.2. Tuning............................................................................................

3.3.3. Adjusting Frequency Range...........................................................

3.4. Test Set Schematic Diagram.........................................................................

3.5. Maintenance and Replacement Parts.............................................................

Figures

Figure 1.1. Ultrasonic Test Set Model 42A12D.........................................................

Figure 1.2. Test Set Block Diagram............................................................................

Figure 3.1 Tuning Components.................................................................................

Figure 3.2. Schematic Ultrasonic Test Set Model 42A12D.......................................

Tables

Table 1.1. Specifications 42A12D Ultrasonic Test Set..............................................

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03-TM-0038 REV 00 PAGE 1 of 5

SECTION I

GENERAL INFORMATION

1.1. INTRODUCTION

1.1.1. GENERAL. This manual contains the description,

operation and maintenance of the 42A12D Ultrasonic Test

Set manufactured by Dukane Corporation, Seacom Division,

2900 Dukane Drive, St. Charles, Illinois 60174. See Figure

1.1.

1.1.2. SYMBOLS AND ABBREVIATIONS. All symbols

and abbreviations used in this manual are in accordance with

the ANSI Y14.15 and MIL-STD-12, respectively.

1.2. GENERAL DESCRIPTION

1.2.1. FUNCTION. The 42A12D is a battery operated het-

erodyne type receiver tunable over the ultrasonic frequency

range of 30 to 45 kHz. The test set was designed primarily

as a self-contained, hand-held functional tester for testing

underwater acoustic beacons. Utilizing the internal micro-

phone and loudspeaker, the Test Set can perform an opera-

tional test on a beacon without removing the beacon from its

mount on the aircraft.

1.2.2. SPECIFICATIONS. The specifications for the

42A12D are given in Table 1.1.

TABLE 1.1. SPECIFICATIONS 42A12D

ULTRASONIC TEST SET

Size.......................................3.0" (7.62 cm) x 4.5"

(11.43 cm) x 2.25" (5.72 cm)

Weight...............................13 ounces (368 grams)

Tuning Range....................................30 to 45 kHz

Battery*................................................9V (Qty 1)

Gain.................................87 dB min. at 37.5 k Hz

Noise.............................Less than one mW across

10 ohm load

Undistorted Output........................... 250 mW into

. 10 ohm load

Microphone Sensitivity.................-150dB re 1uPa

Battery Life......................................30 to 40 hours

Audio Output Jack........................Switchcraft type

43A, permits operation

into headphones, oscilloscope,

etc. in place of internal

loudspeaker (impedance

10 ohm nominal)

* NEDA Type 1604A.

Figure 1.1. Ultrasonic Test Set Model 42A12D.