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MiniOX
3000 Oxygen Monitor
®
NOTE:
The MiniOX
®
has a five second "time out" following
keypad functions. If you do not press
within five seconds, the instrument
returns to the flashing "CAL" mode.
NOTE:
During calibration if "CAL ERR"
flashes in the display, visual, audible
alarms activate, and then "CAL"
flashes, turn OFF the instrument
and repeat calibration procedure.
When recalibrating, be sure to select
the calibration value and use the
corresponding calibration gas. If "CAL
ERR" reoccurs, it may be necessary
to replace the sensor. (See Section 4,
Sensor Replacement)
NOTE:
During operation if "CAL" displays,
you must recalibrate the monitor.
If "CAL" displays following proper
recalibration, it may be necessary to
replace the sensor. (See Section 4,
Sensor Replacement)
Two-Point Linearity Check
To evaluate sensor performance, conduct a two-point
linearity check on the monitor every week or any time
you suspect that the sensor is not accurately reading
oxygen concentrations. Acceptable range for room air
measurement during a linearity check is:
•
20.8% ±2% (18.8% to 22.8%). This variation
allows for differences in:
•
sampling methods
•
accuracy of gas concentration
•
precision of initial setting
If linearity deviates more than ±2%, the sensor is
nearing end-of-life and should be replaced.
To perform a two-point linearity check:
1. Calibrate in room air.
2. Place the sensor in a stream of oxygen with a
known concentration of 100% until the reading
stabilizes.
3. Recalibrate the monitor.
4. After calibration, measure room air. This
reading should be 20.8% ±2% (18.8% or
22.8%) within five minutes.
•
If the variation is greater than ±2%, repeat
the two-point linearity check.
3000 Oxygen Monitor
711449 (Rev.3) 02/2016
•
If the variation is still greater than ±2%,
replace the sensor. (See Section 4, Sensor
Replacement)
Setting the Alarms
The default Alarm Set points are:
•
18% for Low Alarm
(appears in the lower left corner of the display)
•
50% for High Alarm
(appears in the lower right corner of the display)
These alarm points can be reset between 18% -
100%.
NOTE:
The MiniOX
®
retains current alarm settings when
turned OFF.
To Set the Low Alarm
1. Press
once. The following appears on the
display:
•
"AL"
•
up/down arrows
2. Using the arrow keys, scroll up or down to the
desired Low Alarm set point (18% to 99%).
3. The MiniOX
3000 Oxygen Monitor "locks" this
®
value. After five seconds, the monitor:
•
beeps once
•
automatically proceeds to the Monitoring
Mode
NOTE:
The Low Alarm CANNOT be disabled or
set:
•
below 18%
•
above 99%
•
higher than or equal to the High Alarm
setting.
To Set the High Alarm
1. Press
twice. The following appears on the
display:
•
"AL"
•
up/down arrows
2. Using the arrow keys, scroll up or down to the
desired High Alarm set point (19% to 100%).
3. The MiniOX
3000 Oxygen Monitor "locks" this
®
value. After five seconds, the monitor:
•
beeps once
Section 3, Operation
3000 Oxygen Monitor
3-3
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