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heat. As long as the ice is not melting, the OS950 will
accurately read its temperature.
To make an accurate target measurement, remove any ice
or moisture before measuring.
Chapter Four - Maintenance
The high-performance OS950 is a rugged and durable
instrument, designed for long term performance reliability.
4.1 Battery Replacement
Open the instrument's cover to access the battery by loos-
ening the screw on the back of the instrument. Remove the
old battery and replace it with one fresh, 9 V alkaline bat-
tery. Align the battery contacts as indicated on the case.
4.2 Cleaning
The only maintenance required involves keeping the sensor
window clean. This window, located at the base of the
nosepiece's reflective cup, is made of a special crystal that
passes infrared heat. Dirt, greasy films, or moisture on the
window will interfere with the passage of infrared heat and
affect the accuracy of the instrument.
If necessary, clean the sensor window and reflective cup
with a cotton swab dipped in alcohol. Periodic cleaning is a
good practice.
4.3 Storage
When not in use, store the OS950 in a container, to protect
the unit from dirt and dust. Do not store the unit in areas of
extreme heat, cold, or humidity. If not using the OS950 for
a long period, remove the battery from the unit.
4.4 Calibration
The OS950 is factory calibrated under high quality stan-
dards. Because there are no mechanical adjustments, the
instrument is able to maintain its calibration through vibra-
tion and normal use. No field calibration is necessary.
Chapter Five - Troubleshooting
5.1 Diagnostic Codes
The high-performance OS950™ continuously monitors its
ability to produce accurate temperature readings. If either
the target's temperature or the unit's ambient temperature
exceeds the operational limits, the display will default to an
error message.
The battery voltage is also monitored. A low battery is indi-
cated by a separate error code. The unit will continue to
operate as long as accuracy can be assured. If the battery
drops below 5.7 volts, the battery is considered "dead" and
the display defaults to [----].
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