Hollis Explorer User Manual - page 43
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DANGER: Always be careful when doing manual calibrations,
AIR must be exposed to the sensors and NO OTHER GAS.
Calibrations should be conducted routinely. However prior to starting
a dive sequence it is advisable to check the oxygen and CO
2
sensor
calibration by opening the EXPLORER Module and removing it and
the Sensor Module, place them together (Fig. x.x) and turn the unit on.
Then go to the STATUS screen and view the PPO
2
and CO
2
. If the PO
2
is not 0.21 and the CO
2
is not 0.3-0.4mb for the CO
2
, then a calibration
must be performed.
Recommendations
• Never store sensors for long periods of time before
use; they have expiration dates.
• Never subject sensors to high temperatures i.e. (inside
cars, garages etc.).
• Never freeze sensors (left in cars overnight).
• Never subject sensors to physical shocks.
• Never subject sensors to vacuum
• Never submerge sensors in liquids.
• Never attempt to open a sensor. They contain a caustic
chemical.
• Sensors deteriorate very slowly and near the end of
their useful life may show a drift soon after calibration.
• The oxygen sensors are not covered by the warranty,
they must be replaced every 12months or at their ‘do
not use after’ date or sooner depending on the pp02
they are stored in and the hours of use
• Oxygen sensor usage temperatures are:
- Operating temperature range 0 – 40
°C / 32 - 104 °F
- Storage temperature -20 to +50
°C / -4 - 122 °F
- Recommended storage temperature +5 to +15
°C / 41
°C to 59 °C
3
.1
2
!