Teledyne MD300 - Oxygen analyzer and monitor (Diving) - Manual (Page 17)

Portable Oxygen Monitor Operation
Teledyne Analytical Instruments 17
CAUTION: IMPROPER INSTALLATION OF THE BATTERIES
MAY RESULT IN DAMAGE TO THE UNIT AND
BATTERIES.
Note: Use alkaline batteries only. Other battery types will
produce erroneous battery test readings.
3. Install 3 ―AA‖ alkaline batteries into the holder as shown in
Figure 2-6. Each battery has its own slot. To insure proper
polarity, place the bottom (flat) or negative end of the battery
in the end of the holder marked ―–‖. Place the top (button) or
positive end of the battery in the end of the holder marked
―+‖. Do this for each battery.
Figure 2-6: Installing Batteries
4. Re-install the battery compartment door. When the unit is
first turned on the display will momentarily display all LCD
segments. During this period diagnostic tests are being
conducted to insure the circuits are functioning correctly.
The unit will activate the audible and visual alarms for about
1 second. The LCD will flash continuously indicating the
unit is in the unlocked position ready for calibration.
Note: When batteries are first installed or power is lost for any
reason the instrument defaults to the calibration mode. All
keys except the CAL and ON/Off (I/O) keys are inoperable
until a successful calibration is achieved.
5. (MD300 only) To test the batteries. Press the BATT TEST
key once. The battery display, located below the oxygen