Operation; Low / Critically Low - Quantum ONE O2 Installation & Operating Manual

4 OPERATION

The ONE O2 monitor is powered by internal (non-rechargeable) batteries. It operates
continuously and has no ON / OFF switch.
If the Low Battery condition is observed the ONE O2 monitor should be withdrawn
from service immediately as it may no longer operate correctly. A replacement Sensor-
Battery Pack (Part number ONE O2-RS) should then be fitted.
The Sensor-Battery pack within the ONE O2 monitor must be replaced on or before the date
shown on the label which is found on the side of the product. The sensor – battery pack has
a 3-year life and should be replaced every three years. Older versions may have a 2 year
battery and sensor.

4.1 LOW / CRITICALLY LOW

The normal operation of the ONE O2 LOW / CRITICALLY LOW monitor is summarised in the
table below:
Condition
Normal (Monitored
above the `Low Oxygen' threshold
and battery voltage satisfactory.
Low Oxygen
(Monitored oxygen level below the
`Low Oxygen'
`Critically Low Oxygen' thresholds.
Critically Low Oxygen Alarm – 18%
(Monitored oxygen level below the
`Critically Low Oxygen' threshold.
Low Battery (Battery
unsatisfactory)
In the `Normal' condition (monitored oxygen concentration is above the `Low Oxygen
Alarm' threshold and the internal battery voltage is satisfactory) All LED's will be off and
audible unit will be off.
ONE O2 OXYGEN MONITOR ALARM UNITS
www.quantumcryogenics.com
oxygen level
Alarm -19.5%
but above the
voltage
Audible 19.5% Red
Alarm LED
(monitor) (monitor)
Off Off
Bleeping Flashing
Bleeping Flashing
Constant Off
tone
18% Red
LED
(monitor)
Off
Off
Flashing
Off
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