ACR Electronics SM2 User Manual

PRODUCT

SUPPORT

MANUAL

Y1-03-0165

Rev. B

SM-2

Product No. 3940.1

Automatic Crew-Overboard Light

ACR Electronics, Inc.

5757 Ravenswood Road

Fort Lauderdale, Fl 33312

[phone] • Fax [phone]

www.acrelectronics.com

Email: [e-mail]

A Cobham plc Company

Forward

Congratulations and thank you for purchasing the ACR SM-2 Automatic Crew-Overboard Light. The
combination of superior design, high quality raw materials and quality controlled manufacturing produces a
product that will perform for years to come. The Test Facility at ACR can reproduce some of the harshest
environmental conditions known to man. This assures that the products we design and manufacture can
stand up to the rigors found in a marine environment. With proper care and maintenance, your SM-2 light
will be in service for years to come.

ACR is proud to be certified to the ISO 9001:2000, the International Standard for Quality.

This manual provides installation, operation and maintenance instructions for the SM-2 light.

* * * Caution * * *

In order for the marker light to float properly, the 6 volt battery MUST not weigh more than 675 grams
(1.49 lbs). Exceeding this weight will cause the light to sink.

Test light buoyancy in shallow water prior to placing in service.

The following battery types are suggested for use in ACR Marker lights:

Suggested Screw Terminal batteries:
ANSI/NEDA: 915, 915C, 915D, 915AC
Duracell: M915, PC915
Rayovac: 942, 945
Eveready: 510S

Suggested spring terminal batteries (for use with optional battery adapter 9434):

ANSI/NEDA: 908, 908C, 908D, 908AC
Duracell: M908, PC908
Eveready: 509, 1209

Energizer: EN529, (not 529)
Rayovac: 941, 944
Panasonic: W-4FD

Note: Check adapter to ensure that screws are tight during regular maintenance.

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Y1-03-0165 Rev. B

TABLE OF CONTENTS

PARA. TITLE PAGE

1.0 SECTION 1 - CHARACTERISTICS 3

1.1 General 3

1.2 Purpose 3

1.3 Component Ratings 3

1.4 Operation 3

1.5 Effect of Testing 3

1.6 Encapsulating Materials 3

1.7 Construction 4

1.8 Lanyard 4

1.9 Case 4

1.10 Lens 4

1.11 Ballast 4

1.12 Mounting Bracket 4

1.13 Dimensional Stability and Vapor proofness 4

1.14 Battery Connection 5

1.15 Buoyancy 5

1.16 Stroboscopic Flashing Light 5

1.17 Technical Data SM-2 6

Figure 1 Outline and Dimensional Sketch 7
Figure 2 Instruction Plate Label 8

2.0 SECTION 2 - INSTALLATION 9

2.1 Installation Procedures 9

2.2 Battery Installation 9

3.0 SECTION 3 - TESTING 9 - 10

3.1 Operation 9

3.2 Inspection 9

3.3 Disassembly 9 - 10

3.4 Assembly 10

- - - - SM-2 Parts List 11
Figure 3 SM-2 Exploded View 12

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Y1-03-0165 Rev. B

1.0 SECTION 1 - CHARACTERISTICS

1.1 GENERAL

This section describes operating instructions and operational characteristics of the SM-2 Automatic

Crew-overboard light. The information presented herewith is in conformance with U.S. Coast Guard

Specification 46 CFR 161.010 and 161.110.

The SM-2 is a lightweight, compact, battery operated, portable unit which uses modular

construction for basic circuits to simplify maintenance and replacement procedures.

The SM-2 has been redesigned and strengthened to pass the tough UL 1196 testing and MSC.81(70)

1.2 PURPOSE

This unit, shown in Figure 1, is a portable, electronic, floating strobe light, which automatically

rights itself and begins flashing when dropped into water. The SM-2 Light is designed to be carried

aboard all vessels, as well as artificial islands and fixed structures which are located on the outer

continental shelf. It is to be used as part of the required survival equipment complement. The light is

used to mark a position in the water, particularly in a crew-overboard situation. It must be installed

and used in conjunction with other equipment as required by U.S. Coast Guard Regulations.

1.3 COMPONENT RATINGS

Circuit design and component selection is such that component ratings cannot be exceeded when the

unit is operated throughout the entire range of all environmental tests. The SM-2 uses circuit

components and construction techniques, which have been manufactured to the specifications and

requirements of various civilian and Governmental agencies.

1.4 OPERATION

Instructions for operation and maintenance of the SM-2 Light are given on the instruction plate.

(See Figure 2) This unit does not possess any exterior operating controls. Equipment design is such

that controls for use during normal operation would not be detrimental to the reliability of the Light.

The circuit is electronically activated by a gravity switch when the unit is inverted.

1.5 EFFECT OF TESTING

Equipment design is such that application of specified tests will provide no discernible condition

which would be detrimental to the reliability of equipment manufactured in accordance with such

design.

1.6 ENCAPSULATING MATERIALS

Materials used to encapsulate the Module are of the type that will not have any injurious effect on

the insulating materials to which they are applied and do not cause corrosion or deterioration of any

adjacent part. These compounds do not flow at temperatures below +85° C or crack at temperatures

down to -34° C.

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Y1-03-0165 Rev. B