Mean Time Between FailuresGRIDlinkArtTermLED

Calculated by Engineering July 31, 2014

GRIDlink ADR model VT-IPM2M-113 ADR

1,658,500 Hours GB @ 40˚C per MIL-HNDBK-217F2

414,625 hours GF @ 40˚C.

207,312 hours GM @ 40˚C.



Environment Symbol Description
Ground, Benign GB Nonmobile, temperature and humidity controlled environments readily accessible to maintenance; includes laboratory instruments and test equipment, medical electronic equipment, business and scientific computer complexes, and missiles and support equipment in ground silos.
Ground, Fixed GF Moderately controlled environments such as installation in permanent racks with adequate cooling air and possible installation in unheated building; includes permanent installation of air traffic control radar and communications facilities.
Ground, Mobile GM Equipment installed on wheeled or tracked vehicles and equipment manually transported; includes tactical missile ground support equipment, mobile communication equipment, tactical fire direction systems, handheld communications equipment, laser designations and range finders.