An additional safety measure to crystal optic material for arc flash protection
, which protects the infrared thermographer in case of arc flashes during scheduled, periodic inspection; is to lock security covers. Locking ensures that only trained and authorized personnel can unlock the covers to conduct an inspection. In addition, locking also protects the crystal optic from impacts. Most importantly, it offers further protection from arc flashes.
Installing IR windows in your equipment would ensure lesser damage caused by arc flashes to both people and property and assist in complying with NFPA 70e.