scope:

This Standard covers the technical requirements for gaseous tritiumo light sources suitable f o r usexover the temperature range of -60 to + 70 C. It is emphasized that 'tritium filled sources are the only light source of this type authorized for Service use.

Lamps may be used at temperatures above 70 C, up t o a maximum of 100°C, provided a shorter half .life and lower luminance are accepted

Over a period of time the luminance of a GTLSdecays irrespective of whether in use or storage. A warning is therefore given against buying and storing excess quantities.

Safety considerations governing production, storage, and use of GTLSs in Service equiprnents or installations are set out in Section 15 of this Standard