Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref
: AS2-802-14 -
January 2016
Page 17
8
Maintenance
8.1
Regular maintenance schedule
Regular Maintenance consists of the following tasks:
FREQUENCY
Monthly
Check that the instrument is maintained in a clean state. In particular ensure that
the gas inlet ports and breather port are unobstructed. When necessary, clean
the instrument with a dampened cloth.
Check the battery condition indicator. Change the batteries when the indicator is
less than 168 hours. Replace with Analox P/N 2557-4625 (Hyperbarically tested
D-cells)
Check the SUB MkIIP readings in a verified atmosphere
Annually
Factory calibration is required at least once every 12 months to replace the
electrochemical oxygen sensor.
Where the instrument is used as a standby for use in emergencies, replace the
main batteries as detailed in Section 4.1
Five Yearly
Change the Backup batteries as detailed in Section 4.2
8.2
General care
The SUB MkIIP is designed to be water resistant to a depth of 1 meter. However it should be
noted that the instrument is not designed to operate when submerged and should not be
intentionally immersed in liquid or left outside unprotected.
In the event of submersion in water the unit should be dried with a soft cloth. Care should be
taken to ensure that all water is removed from the two gas ports on the front face of the unit.
When clearing the CO
2
sensor port, care should be taken not to damage the delicate black
bead of the temperature sensor as shown below:
