Max-250 Oxygen Sensor - Maxtec MaxO2 OM-25A Operating Manual & Instructions For Use

gas to the unit at a rate of 1-10 liters per minute(2 liters per min. is
recommended).
3. Using the ON/OFF key
mode.
4. Allow the oxygen reading to stabilize. This will normally take about
30 seconds or more.
5. Press the LOCK/UNLOCK key
will appear on the display for about 1 second and then the "%" sign
will disappear from the display.
6. Press the CALIBRATE key
appear on the display for about 1 second and then the "%" sign will
start to flash.
7. Use the
concentration to the level of the known concentration. Pressing the
arrow keys changes the value in .1% increments. If the keys are held
down for more than 1 second the display will scroll at a rate of .4%
per second.
Note: If 10 seconds elapse between key actuations, the system
will store the latest calibration value and will revert to normal
operation. If this occurs inadvertently, simply repeat the
calibration procedure.
8. When the calibration value is set, press the CALIBRATE
LOCK/UNLOCK key
and return to normal operation.
Note: If the message "CAL," followed by the message "Er"
flashes on the display after entering the desired calibration
value, the system has determined that the entered value will not
allow operation within the specified output range of the sensor.
This situation may occur if:
a) the operator has inadvertently entered the wrong
concentration for the calibration gas.
b) the concentration of the calibration gas is not correct.
c) the sensor is in need of replacement.
d) the operator attempted to adjust the monitor before allowing
sufficient time for the calibration gas to purge out the previous
sample.
e) the flow and pressure of the calibration gas was not properly
regulated.
Check these items and repeat calibration. If calibration error
4
and arrow keys to adjust the displayed oxygen
866.4.Maxtec
, make sure the unit is in the power on
to unlock the keypad. "UL"
on the keypad. The word "CAL" will
again to accept the calibration setting
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