barfield 1811D Series, User Instruction Manual, Page: 50 / 64

Engineering Specification
Title: Altimeter, Ground Support Equipment
Barfield, Inc
4101 NW 29 Street
Miami Florida 33142
Drawing No: 23 ‐ 338 ‐ 00001 Page 2 of 5
1. Purpose:
To specify performance requirements for Pressure Sensitive Altimeters for use in B.I.C.
manufactured ground support test equipment.
2. Scope:
This PRODUCT STANDARD SPECIFICATION covers two basic types of instruments as
follows:
TYPE I - Range 35,000 ft. Barometric Pressure. Scale range at least 28.1 - 30.99
inches of Mercury (946-1049 millibars). May include markers working in
conjunction with the Barometric Pressure Scale to indicate pressure -
altitude.
TYPE II - Range 50,000 ft. Barometric Pressure. Scale range at least 28.1 - 30.99
inches of Mercury (946-1049 millibars). May include markers working in
conjunction with Barometric Pressure Scale to indicate pressure - altitude.
3. Identification:
All units regardless of origin of manufacture are to be identified by B.I.C. assigned part
numbers as follows:
B.I.C. P/N Baro. Units TYPE NO. RANGE
124-00001 * in.Hg Baro II 50,000 FT
124-00002 in.Hg Baro II 55,000 FT
124-00003 Dual Baro II 50,000 FT
124-00004 in.Hg Baro I 35,000 FT
124-00005
Dual Baro
in.Hg/mb
I 35,000 FT
124-00006 * mb Baro II 50,000 FT
124-00007 * mb Baro I 35,000 FT
124-00008 * in.Hg Baro II
50,000 FT
(OXYGEN ONLY)
Note: "*" indicates service only, not available.
4. Test
Conditions:
Unless otherwise specified, all tests shall be made with the instrument mounted in the
horizontal (Face UP) position.