Panasonic PT-DZ12000U Operating Instructions Manual page 86

(h) The licensee should implement institutional controls to
assure that these devices are not used in areas immediately
dangerous to life or health (IDLH).
(i) This type of respirator may be used as an emergency
device in unknown concentrations for protection against
inhalation hazards. External radiation hazards and other
limitations to permitted exposure such as skin absorption
shall be taken into account in these circumstances. This
device may not be used by any individual who experiences
perceptible outward leakage of breathing gas while wearing
the device.
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