scope:

This specification covers portable indicators used for detecting and indicating the concentration of combustible gases and vapors in air and for indicating the oxygen content in air (see 6.2).

Portable combustible gas and oxygen indicators shall be of the following types and classes as specified (see 6.1.1):

Class 1 - Combustible gas, types A or B. Class 2 - Oxygen. Class 3 - Dual units - combustible gas and oxygen. Type A - Detect miscellaneous combustible gases or vapors, and atmospheres containing nonleaded gasoline vapors (see 3.4.1.1 and 3.4.1.4). Type B - Detect miscellaneous combustible gases or vapors, including leaded gaso- line vapors (see 3.4.1.2).

The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein.

SPECIFICATIONS FEDERAL ZZ-H-461 - Hose, Rubber, Gas (Acetylene-Hydrogen, Air and Oxygen). MILITARY MIL-R-94 - Resistor, Variable, Composition, General Specification For. MIL-B-117 - Bag, Sleeve and Tubing - Interior Packaging. MIL-W-530 - Webbing, Textile, Cotton, General Purpose, Natural or in Colors. MIL-I-983 - Interior Communication Equipment, Naval Shipboard; Basic Design Requirements for. MIL-L-3122 - Leather, Cattlehide, For Footwear Uppers, Chrome Tanned, Fat, Liquored. MIL-S-3786 - Switches, Rotary (Circuit Selector, Low-Current Capacity), General Specification For. MIL-S-3950 - Switch, Toggle, Environmentally Sealed, General Specification for. MIL-M-7298 - Manual, Technical, Commercial Equipment. MIL-S-8805 - Switches and Switch Assemblies, Sensitive and Push (Snap Action), General Specification For.

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Ship Engineering Center, SEC 6124, Department of the Navy, Washington, D.C. 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

MILITARY (Continued) MIL-M-10304 - Meters, Electrical Indicating, Panel Type, Ruggedized, General Specification For. MIL-P-15024 - Plates, Tags and Bands for Identification of Equipment. MIL-P-15024/5 - Plates, Identification. MIL-M-15071 - Manuals, Technical: Equipments and Systems, Content Requirements for. MIL-M-16034 - Meter, Electrical - Indicating (Switchboard and Portable Types). MIL-E-17555 - Electronic and Electrical Equipment, Accessories and Repair Parts, Packaging and Packing of. MIL-S-18396 - Switches, Meter and Control, Naval Shipboard. MIL-B-55130 - Battery, Storage, Sealed, Nickel Cadmium. MIL-B-81847 - Bag, Flexible, Electrostatic-free, Watervaporproof, Heat Sealable. STANDARDS FEDERAL FED-STD-313 - Symbol for Packages and Containers for Hazardous Industrial Chemicals and Materials. MILITARY MIL-STD-108 - Definition of and Basic Requirement for Enclosure for Electric and Electronic Equipment. MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited). MIL-STD-454 - Standard General Requirements for Electronic Equipment. MIL-STD-810 - Environmental Test Methods. MIL-STD-831 - Test Reports, Preparation of. MIL-STD-1399 - Interface Standard For Shipboard Systems. Section 103 - Interface Standard For Shipboard Systems, Electric Power Alternating Current. MS15011 - Fittings, Hose, Welding and Cutting, Oxygen and Acetylene.

(Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.)

The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply.

BUREAU OF MINES Bulletin 503 - Limits of Flammability of Gases and Vapors.

(Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington, D.C. 20002.)

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA) National Fire Codes - Vol. 13 - 1976 - Manual 325M - 1969 - Fire-Hazard, Properties, Flammable Liquids, Gases and Volatile Solids.

(Application for copies should be addressed to National Fire Protection Association, 60 Batterymarch Street, Boston, Massachusetts 02110.)

UNIFORM CLASSIFICATION COMMITTEE, AGENT Uniform Freight Classification Rules.

(Application for copies should be addressed to the Uniform Classification Committee, Room 1106, 222 South Riverside Drive, Chicago, Illinois 60606.)

(Technical society and technical association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.)