Precision Medical Timox Oxygen Timer - Manual (Page 3)

BATTERY REPLACEMENT
1. The battery should be replaced when the
display becomes dim.
2. Remove the three small screws at the upper
right and left and lower left outer corners
on the back of the unit. (The screw at the
lower right-hand corner does not need to be
removed.)
3. Lift the backplate/pressure block assembly
out of the housing. Be careful not to pull the
wires loose from the PC board.
4. Remove the old battery by pulling it out of
the battery holder.
5. Insert the new battery into the battery holder
so it's + and – ends match the markings
in the bottom of the battery holder. (If the
battery is put in backwards, the LCD display
will remain blank.) The replacement battery
is a lithium type battery Sanyo #CR14250SE
or equal. It can be purchased from Medical
Fittings, Inc. (our part #8066) or from any
electronics supply store such as Newark
Electronics.
6. Replace the backplate/pressure block
assembly; be careful not to pinch the wires
between the PC board and the pressure
block. Orient the backplate/pressure block
assembly so the handtight connection is at
the end away from the LCD display. Replace
the three screws in the back and make sure
the timer display is visible, it should read
000.0 hours.