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FULL TITLE: OPERATOR, ORGANIZATIONAL, FIELD AND-DEPOT MAINTENANCE MANUAL, INCLUDING REPAIR PARTS AND SPECIAL TOOL LISTS ALTIMETER, SURVEYING: 4,500 METERS, 2 METER DIVISIONS (WALLACE AND TIERNAN TYPE FS-199)

Published by the Department of the Army in 1960 - updated though 1978. 134 pages; on CD-ROM.

Scope

This manual provides information for the care and use of the Surveying Altimeter, Type FA-199, manufactured by Wallace and Tiernan, Belleville, N. J. (fig. 1). Sections II through VIII include description, preparation for shipment or storage, principles of operation, operating instructions, methods of altimetry and maintenance procedure. Section VIII consists of calibration and conversion tables and charts for reference by the text.

Description and Use

The Surveying Altimeter is a portable instrument provided with a carrying strap and is used in obtaining elevations for supplementary vertical control of aerial photographs for topographic mapping, pipe line and highway location, geological and geophysical exploration, and similar requirements.

CONTENTS:

I. INTRODUCTION Scope Description and use

II. DESCRIPTION General Dial Case and cover Mechanism Accessories

III. PREPARATION FOR SHIPMENT OR STORAGE General Packing, handling, and storage

IV. PRINCIPLES OF OPERATION Atmospheric pressure - altimeter relationship Pressure sensing element

V. OPERATING INSTRUCTIONS General Dial reading Operating sling psychrometer

VI. METHODS OF ALTIMETRY General Optimum accuracy considerations Precautions Single-base method of altimetry Two-base method of altimetry Leapfrog method of altimetry

VII. MAINTENANCE General Calibration Renewing the desiccant Removal and replacement of lamps and batteries Removal and replacement of cover, bezel ring, and plastic window Removal and replacement of pointer Rack and pinion alignment Removal and replacement of mechanism

VIII. CORRECTION AND CONVERSION TABLES General Table I, air temperature and relative humidity correction Table II, altitude correction Table III, latitude correction Table IV, meters to feet conversion Table V, feet to meters conversion Individual instrument temperature correction Table VI, conversion table - meters to inches mercury (SMT No. 651)

APPENDIX I. MAINTENANCE ALLOCATION CHART

APPENDIX II. BASIC ISSUE ITEMS LIST

APPENDIX III. MAINTENANCE AND OPERATING SUPPLIES

APPENDIX IV. REPAIR PARTS LIST