EOTech LWTS Light Weapon Thermal Sight - Manual (Page 62)

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2.28 PBIT FAIL (Continued)
Figure 2-35. System Failure Indicator.
If the System Failure Indicator appears in the eyepiece
display during the course of normal LWTS operation, allow
the device to operate for an additional 20 minutes. If the
System Failure Indicator persists, refer to section 3.4 for
additional guidance.
2.29 UNUSUAL ENVIRONMENT / WEATHER
Extreme Cold
The LWTS may exhibit degradation of performance or
failure to operate in temperatures below -40ºF (-40ºC).
To maximize performance, minimize exposure time.
In addition, battery life will be reduced in extremely cold
temperatures. Periodically removing batteries and warming
them with body heat can increase battery run time.
SYSTEM FAILURE
INDICATOR