Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref
: AS2-802-14 -
January 2016
Page 6
Depth readings are displayed in FSW (feet sea water)
Temperature readings are displayed in °F (Fahrenheit).
The battery condition indicator provides an estimate of the number of hour’s battery life
remaining. The actual battery life achieved can be heavily influenced by temperature. It is
possible under certain conditions to considerably exceed the estimated battery life.
The instrument readings will remain accurate until the batteries are exhausted. The
brightness of the backlights will fade as the batteries discharge. When the Battery Condition
indicator reaches 168 hours, new batteries should be inserted for applications where 7-day
continuous emergency operation is required.
The battery condition indicator will indicate ‘E-Pr’ when the instrument is operating from an
external power supply.
The backlight is turned on by momentarily pressing the pushbutton on the front of the
instrument. The backlight will turn off automatically after a short period. A flashing indicator is
built into the backlight switch to show that the instrument is operating. This can also be used
to locate the backlight switch in low light conditions.
The Elapsed Timer is reset to zero by pressing and holding the pushbutton for approximately
two seconds. The Elapsed Time is displayed as the number of days and hours since the
timer was last reset. The timer is maintained even when the instrument is switched off. The
timer will stop when it reaches 99 days and 23 hours. Resetting the elapsed time, will also
clear existing data from the data log memory and restart the data log period.
It is intended in a DISSUB incident for example, that the Elapsed Timer, and thus data log
period, is reset at the start of the incident. The timer will then indicate the elapsed time from
the start of the incident in days and hours.
