TIA TIA-455-189

ALSO SEE NECA NEIS 301

INTRODUCTION

Intent.¹ The intent of thisprocedure is to determine the ability of fiber optic components towithstand the effects of controlled amounts of ozone. Althoughintended primarily for the evaluation of parts such asinterconnecting devices, the method may be applied to othercomponents when applicable and when required by a DetailSpecification.

Failure Modes. Potential failure modes for thistest include, but are not limited to:

a. Loosening or breaking of parts,

b. Insert bonding failure,

c. Excessive swelling of resilient materials, or otherdegradation of elastomers,

d. Damage to interface seals.

Ozone Hazard. Ozone is a physiologicallyhazardous gas at elevated concentrations. Levels of acceptableindustrial exposure have been established by the AmericanConference of Governmental Industrial Hygienists, 6500 GlenwayAve., Building D-7, Cincinnati, Ohio 45211. Ozone has a distinctiveodor which is initially discernible at low concentrations. It islikely to be present whenever voltages exist which are sufficientto cause partial or complete discharges in air or in otheratmospheres containing oxygen. (It may also be formed in air byultraviolet radiation, as a combustion product, etc.) When the odorof ozone is persistently present or when ozone generatingconditions continue, temporary impairment of the sense of smellcould occur. Thus the concentration of ozone in the atmosphereshould be measured using commercially available monitoring devices.Appropriate means, such as installation of exhaust vents, should betaken to maintain ozone concentrations in working areas withinacceptable levels.

For citizen health reasons, it should be noted that many largecities of the world become very concerned whenever ozone levelsexceed 100 pphm (parts per hundred million).

¹This method is similar to Method 1007.1 ofMIL-STD-1344A.

Edition:

92

Published:

01/01/1992

Number of Pages:

13

File Size:

1 file , 850 KB