scope:

This specification covers the general requirements for absolute, gage, and differential pressure switches (see 6.1).

The type shall be identified in accordance with table I. TABLE I. Type

Type Switch -------------------------------------------- I Absolute pressure II Gage pressure III Differential pressure

The high temperature shall be in accordance with table II. TABLE II. High temperature

Symbol Temperature operating and nonoperating °F °C -------------------------------------- B 275 135 C 350 176.6 D 400 204.4 E 500 260 F 600 315.5

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to Directorate of Electronic Support, AFALD/PTS, Gentile AFS, OH 45444 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

The low temperature shall be in accordance with table III. TABLE III. Low temperature.

Symbol Temperature operating and nonoperating °F °C -------------------------------- D −65 −53.9 E −85 −65 F −100 −73.4

The altitude shall be in accordance with table IV. TABLE IV. Altitude.

Symbol Altitude Pressure equivalent feet psia (lb_f/in²a) ----------------------------------------------------------------- A 10,000 10.1 B 20,000 6.8 C 70,000 0.7 D 100,000 0.16 E 150,000 0.021

The shock shall be in accordance with table V. TABLE V. Shock.

Symbol Shock Gs ---------------------------- A 50 B 75 C 100 D 500 E High impact

The vibration shall be in accordance with table VI. TABLE VI. Vibration.

Symbol Type ------------------------------------- S Sine R Random

The mechanical life shall be in accordance with table VII. TABLE VII. Mechanical life.

Symbol Cycles ---------------------------- A 100,000 B 200,000 E 20,000 F 50,000

The electrical life shall be in accordance with table VIII. TABLE VIII. Electrical life.

Symbol Cycles ---------------------------- A 10,000 B 25,000 C 50,000 D 100,000

The acceleration shall be in accordance with table IX. TABLE IX. Acceleration.

Symbol Gs --------------------------- A 2 B 4 C 8 D 12 E 16

The pressure pulsation amplitude shall be in accordance with table X in determining the actuation and deactuation points. TABLE X. Pressure pulsation amplitude.

Grade Percent steady state pressure ------------------------------- A 0 B 2 C 5 D 8 E 10

The pressure pulsation frequency shall be in accordance with table XI. TABLE XI. Pressure pulsation frequency.

Grade Frequency in Hz ---------------------------- A 0 B 60 ± 5 C 200 ± 20 D 500 ± 50 E 700 ± 50

The pressure rise shall be in accordance with table XII. TABLE XII. Pressure rise.

Grade Pressure rise rate in psi (lb_f/in²) per second -------------------------------------------------- A less than 100 B more than 1000 C 50,000 D 100,000 E 250,000 F 500,000 G 1,000,000 H 1,500,000 I 2,000,000 J 2,500,000

intended Use: