Quantum ONE O2 Installation instructions

ONE O2 OXYGEN MONITOR
ALARM UNITS
INSTALLATION & OPERATING MANUAL
Revision
Date
Details
1-0
12-09-17
1ST ISSUE
Quantum Cryogenics
Quantum Cryogenics
Unit B Cranmere Road
Unit 13 Langley Court Business Park
Okehampton
World’s End
Devon, EX20 1UE
Berkshire, RG20 8RY
T. [phone]
F. [phone]
W. www.quantumcryogenics.com

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COPYRIGHT QUANTUM CRYOGENICS. 2017 ©
THIS DOCUMENT IS THE PROPERTY OF QUANTUM CRYOGENICS. NO PART OF THIS
DOCUMENT MAY BE REPRODUCED TO A THIRD PARTY IN ANY FORM WITHOUT THE
WRITTEN PERMISSION OF QUANTUM CRYOGENICS.
QUANTUM CRYOGENICS IS A TRADING NAME OF QUANTUM PRODUCTION LTD.

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ONE O2 OXYGEN MONITOR ALARM UNITS Page 1 of 21.
TABLE OF CONTENTS
1SAFETY WARNINGS........................................................................................................ 2
2INTRODUCTION.............................................................................................................. 6
3INSTALLATION................................................................................................................ 7
4OPERATION.................................................................................................................... 8
4.1 LOW / CRITICALLY LOW........................................................................................... 8
4.2 HIGH / CRITICALLY HIGH ......................................................................................... 9
4.3 HIGH / LOW........................................................................................................... 10
5MAINTENANCE ............................................................................................................ 11
5.1 TESTING ................................................................................................................ 11
5.2 SENSOR OPTIMISATION ........................................................................................ 11
5.3 CALIBRATION LOW / CRITICALLY LOW .................................................................. 11
5.4 CALIBRATION HIGH / CRITICALLY HIGH................................................................. 12
5.5 CALIBRATION HIGH / LOW .................................................................................... 12
5.6 REPLACING THE SENSOR AND BATTERY PACK ...................................................... 13
5.6.1 REMOVAL OF THE OLD SENSOR-BATTERY PACK. ........................................... 13
5.6.2 FITTING THE NEW SENSOR-BATTERY PACK .................................................... 14
5.6.3 CALIBRATING AND TESTING AFTER FITTING A NEW SENSOR-BATTERY PACK. 15
5.6.4 FITTING THE NEW `REPLACE SENSOR-BATTERY PACK BY ...’ LABEL ............... 15
6APPENDIX A –TECHNICAL SPECIFICATION................................................................... 16
7APPENDIX B –QUICK REFERENCE GUIDE ..................................................................... 17
8APPENDIX C –WARRANTY STATEMENT ....................................................................... 19
9APPENDIX D –EC DECLARATION OF CONFORMITY...................................................... 20
10 APPENDIX E –END OF LIFE DISPOSAL ...................................................................... 21

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1SAFETY WARNINGS
THESE INSTALLATION AND OPERATION INSTRUCTIONS SHOULD BE READ
COMPLETELY BEFORE INSTALLING OR OPERATING THIS EQUIPMENT / SYSTEM.
THIS MANUAL ASSUMES:
•YOU ARE ALREADY TRAINED AND COMPETENT IN THE SAFE USE AND HANDLING OF
INDUSTRIAL GASES / CRYOGENIC FLUIDS AND CRYOGENIC / ELECTRICAL EQUIPMENT!
•YOU ARE FAMILIAR WITH THE RISKS ASSCOCIATED WITH EXTREME LOW
TEMPERATURES!
•YOU ARE FAMILIAR WITH THE RISKS ASSOCIATED WITH ASPHYXIATION AND LOW
OXYGEN ATMOSPHERES!
Persons handling cryogenic liquids (liquid nitrogen, argon or carbon dioxide) should be
aware of the dangers associated with their extreme cold and also the possibility of
asphyxiation should large volumes of liquid or gas be discharged in confined or poorly
ventilated areas. Persons handling liquid oxygen must also be aware of its potentially
hazardous oxidising properties. Carbon dioxide additionally has toxic properties.
CARBON DIOXIDE (CO2) IS TOXIC. O2 MONITORING SYSTEMS SHOULD NOT BE USED FOR
CO2 MONITORING. CO2 CONCENTRATIONS WILL BECOME DANGEROUSLY TOXIC BEFORE
AN O2 MONITORING SYSTEM WILL REACT. A DEDICATED CO2 MONITOR SHOULD BE USED
TO PROTECT AGAINST CO2 ENRICHMENT.
USE APPROPRIATE PERSONAL GAS MONITORS WHEN WORKING.

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Standard equipment must NOT be used with liquid oxygen. Only equipment which has been
specially cleaned and specifically labelled as `CLEANED FOR OXYGEN SERVICE’ may be used
with liquid oxygen. This is due to the increased risk of fire or spontaneous combustion in
pure or enriched oxygen environments.
Safety information provided by the suppliers of the industrial gas / cryogenic liquid must be
read and understood before and followed during the installation and operation of this
equipment. Failure to observe all safety precautions may result in property damage, personal
injury, and/or death.
DO NOT TOUCH COLD SURFACES OR LIQUID WITH BARE SKIN.
Cryogenic liquids are extremely cold and exposure of skin or eyes to liquid, cold gas or cooled
objects may result in severe cold burn injury. The use of eye / face protection, insulated

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gloves, appropriate clothing and footwear is required. Take time to consider these and other
safety precautions that must be observed.
Siren beacons can be extremely loud, >110dBA. Wear appropriate ear protection if working
with or close to active siren beacons. Consider others working nearby.
Failure to correctly maintain the equipment / system could result in the equipment / system
failing to operate correctly. Calibration should only be performed by persons trained and
approved by Quantum Cryogenics.
The equipment must be used only for the purpose and in the manner described in these
instructions. If used for other purposes or in a manner not specified protection provided by
this equipment may be impaired. The equipment must not be used as a critical component
in life support devices or systems.
ELECTRICAL SHOCK CAN KILL
Isolate all power supplies before opening enclosures or attempting to connect / disconnect
equipment. Items may have multiple power sources which may include, but are not limited
to, internal battery, dedicated low voltage power supply, external low voltage power supply
(with or without battery back-up). Power may also be supplied from repeater units or other
ancillary items connected.

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All electrical installation must only be carried out by a qualified electrician or other suitably
qualified and competent person.
Take extreme care if handling the PCB, THE ASSEMBLY IS EXTREMELY FRAGILE. Protect it
from damage and electro static discharge.

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2INTRODUCTION
The ONE O2 monitor continually monitors the air surrounding the sensor on its base and
provides visual and audible alarms when the monitored concentration of oxygen passes pre-
set `Alarm’ levels.
There are 3 models of ONE O2 monitor units for different oxygen deficiency and enrichment
applications. Please ensure you have correctly identified the model type and refer to the
appropriate sections of this manual. To identify the model type check the text adjacent the
red LEDs on the face plate.
Low / Critically Low
For oxygen deficiency applications
Alarm 1 Set 19.5% LOW OXYGEN ALARM
Alarm 2 Set 18.2% CRITICALLY LOW OXYGEN ALARM
High / Critically High
For oxygen enrichment applications
Alarm 1 Set 22% HIGH OXYGEN ALARM
Alarm 2 Set 23% CRITICALLY HIGH OXYGEN ALARM
High / Low
For combined enrichment and deficiency applications
Alarm 1 Set 22% HIGH OXYGEN ALARM
Alarm 2 Set 18.2% LOW OXYGEN ALARM
Please note the alarm thresholds shown above are the current default settings. Older
equipment may have different alarm thresholds. Please refer to the calibration certificate for
threshold settings specific to an item of equipment.

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3INSTALLATION
The ONE O2 monitor should be fitted adjacent to the gas source. The monitor should be
wall mounted by fixing firmly to a clean, dry, vertical surface using appropriate fixings.
When deciding where to position the monitor, consideration should be given to:
[i] whether the alarm lights and audible alarm can be easily seen and heard, and
[ii] whether the unit is placed so that it is monitoring the required area adequately.
Take care to ensure that the monitor is not installed above items such as work tops or other
equipment and cannot be obstructed or blocked-in by any item which may restrict the free
flow of air around the monitor.
The monitor should be located at a height appropriate for the monitoring conditions. For
oxygen deficiency applications where the inert gas has a relative density greater than air the
monitor should be positioned 1m above floor level. For inert gases with a relative density
lower than air (helium) the monitor should be positioned as high as practicable. For oxygen
enrichment applications the monitor should be positioned 1m above floor level.
The ONE O2 base unit monitors the surrounding air by natural convection and diffusion into
the oxygen sensor through the sensor filter in its base.
IT IS IMPORTANT TO ENSURE THAT THE SENSOR FILTER IS NEITHER COVERED NOR BLOCKED
and that
AIR CAN CIRCULATE FREELY AROUND THIS FILTER AND THE BASE OF THE UNIT.
The ONE O2 monitor must not be exposed to, immersed in or sprayed with water, rain,
solutions or other solvents.
For wiring information please refer to the CryoPanel 4 manual.

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4OPERATION
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
Audible
Alarm
(monitor)
19.5% Red
LED
(monitor)
18% Red
LED
(monitor)
Normal (Monitored oxygen level
above the `Low Oxygen’ threshold
and battery voltage satisfactory.
Off
Off
Off
Low Oxygen Alarm -19.5%
(Monitored oxygen level below the
`Low Oxygen’ but above the
`Critically Low Oxygen’ thresholds.
Bleeping
Flashing
Off
Critically Low Oxygen Alarm –18%
(Monitored oxygen level below the
`Critically Low Oxygen’ threshold.
Bleeping
Flashing
Flashing
Low Battery (Battery voltage
unsatisfactory)
Constant
tone
Off
Off
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.

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4.2 HIGH / CRITICALLY HIGH
The normal operation of the ONE O2 HIGH / CRITICALLY HIGH monitor is summarised in the
table below:
Condition
Audible
Alarm
(monitor)
22% Red
LED
(monitor)
23% Red
LED
(monitor)
Normal (Monitored oxygen level
below the `High Oxygen’ threshold
and battery voltage satisfactory.
Off
Off
Off
High Oxygen Alarm –22%
(Monitored oxygen level above the
`High Oxygen’ but below the
`Critically High Oxygen’ thresholds.
Bleeping
Flashing
Off
Critically High Oxygen Alarm –23%
(Monitored oxygen level above the
`Critically High Oxygen’ threshold.
Bleeping
Flashing
Flashing
Low Battery (Battery voltage
unsatisfactory)
Constant
tone
Off
Off
In the `Normal’ condition (monitored oxygen concentration is below the `High Oxygen
Alarm’ threshold and the internal battery voltage is satisfactory) All LED’s will be off and
audible unit will be off.

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4.3 HIGH / LOW
The normal operation of the ONE O2 HIGH / LOW monitor is summarised in the table below:
Condition
Audible
Alarm
(monitor)
22% Red
LED
(monitor)
18.2% Red
LED
(monitor)
Normal (Monitored oxygen level
above the `Low Oxygen’ and below
the ‘High Oxygen’ thresholds and
battery voltage satisfactory.
Off
Off
Off
Low Oxygen Alarm –18.2%
(Monitored oxygen level below the
`Low Oxygen’ threshold.
Bleeping
Flashing
Off
High Oxygen Alarm –22%
(Monitored oxygen level above the
`High Oxygen’ threshold.
Bleeping
Off
Flashing
Low Battery (Battery voltage
unsatisfactory)
Constant
tone
Off
Off
In the `Normal’ condition (monitored oxygen concentration is above the `Low Oxygen
Alarm’ and below the ‘High Oxygen’ thresholds and the internal battery voltage is
satisfactory) All LED’s will be off and audible unit will be off.

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5MAINTENANCE
Other than the Sensor-Battery Pack there are no operator serviceable or replaceable parts. It
is important that the weekly, monthly and annual checks described below are followed, in
order to ensure that the monitor offers appropriate protection to the user for the life of the
sensor/battery pack. Failure to do so may lead to false alarms.
Please remember SAFETY if you suspect your ONE O2 is malfunctioning. DO NOT ENTER ANY
AREA UNLESS GAS CONCENTRATION IS KNOWN AND AT A SAFE LEVEL.
5.1 TESTING
The ONE O2 system should be tested for functionality on a monthly basis. If the ONE O2
system fails a properly constituted functionality test, it should be withdrawn from service
immediately. We recommend keeping a log of this test and recommend that it should be
undertaken as part of routine fire alarm tests in order that staff should recognise the alarm
and understand the evacuation procedure.
A functionality test involves admitting test gas having an oxygen concentration marginally
past the alarm threshold(s) to the sensor and checking that both the appropriate red LEDs
flash and that the audible alarm bleeps. Please refer to the appropriate model table in the
operation section of this manual for expected unit behaviour. The alarms should activate
within 30 seconds.
Calibrated test gas kits are available to purchase from Quantum Cryogenics.
The ONE O2 monitor should return to the normal (non-alarm) state within 60 seconds of
fresh air being readmitted to the sensor.
The ONE O2 monitor should be recalibrated at intervals of no longer than twelve months
and the sensor optimised every month.
5.2 SENSOR OPTIMISATION
This applies to all models of ONE O2.
First, fresh dry air (or test gas with a concentration of 20.8% oxygen in balance of nitrogen)
should be admitted to the sensor filter of the monitor for at least 60 seconds.
IMPORTANT NOTE: The oxygen concentration in enclosed areas and rooms within buildings
may vary significantly from 20.8% O2 due to on-going gas release and / or poor ventilation.
In these circumstances the monitor should optimised using 20.8% O2 calibration test gas.
Whilst still exposed to this gas, a fine blade instrument screwdriver (or trimtool) should be
used to adjust the brass coloured adjustment screw (20 turn potentiometer) which is located
on the top of the monitor. The adjustment screw should be adjusted until the Cal High and
Cal Low LED’s are illuminated when the green cal button is pressed on the top of the unit.
5.3 CALIBRATION LOW / CRITICALLY LOW
To perform a sensor calibration undertake the sensor optimisation procedure outlined
above. When successfully completed a test gas of 18.0% oxygen (balance nitrogen) should

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then be admitted to the sensor filter (ideally at a flow rate of 0.5 litres per minute). The
`Low Oxygen’ and `Critically Low’ Oxygen’ red LEDs should both flash and the audible alarm
bleep within 30 seconds.
When fresh air is admitted again to the sensor filter, the alarm indications should cancel
within 60 seconds.
5.4 CALIBRATION HIGH / CRITICALLY HIGH
To perform a sensor calibration undertake the sensor optimisation procedure outlined
above. When successfully completed a test gas of 23.5% oxygen (balance nitrogen) should
then be admitted to the sensor filter (ideally at a flow rate of 0.5 litres per minute). The
`High Oxygen’ and `Critically High’ Oxygen’ red LEDs should both flash and the audible
alarm bleep within 30 seconds.
When fresh air is admitted again to the sensor filter, the alarm indications should cancel
within 60 seconds.
5.5 CALIBRATION HIGH / LOW
To perform a sensor calibration undertake the sensor optimisation procedure outlined
above. When successfully completed a test gas of 18.0% oxygen (balance nitrogen) should
then be admitted to the sensor filter (ideally at a flow rate of 0.5 litres per minute). The
`Low Oxygen’ red LED should both flash and the audible alarm bleep within 30 seconds.
A test gas of 23.5% oxygen (balance nitrogen) should then be admitted to the sensor filter
(ideally at a flow rate of 0.5 litres per minute). The `High Oxygen’ and ` red LED should both
flash and the audible alarm bleep within 30 seconds.
When fresh air is admitted again to the sensor filter, the alarm indications should cancel
within 60 seconds.

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5.6 REPLACING THE SENSOR AND BATTERY PACK
THIS UNIT IS DESIGNED PROTECT LIFE. PLEASE NOTE THAT ONLY QUANTUM
CRYOGENICS APPROVED / TRAINED OPERATIVES SHOULD ATTEMPT TO REPLACE A
SENSOR PACK AND RECALIBRATE THE UNIT. INCORRECT REPLACEMENT /
RECALIBRATION COULD LEAD TO FAILURE OF THE UNT TO OPERATE AS INTENDED.
LEADING TO A DANGER TO LIFE.
WHEN REPLACING ONEO2 SENSOR AND BATTERY PACK ENSURE ONLY GENUINE
QUANTUM PARTS ARE USED. DO NOT ATTEMPT TO MODIFY OR REPAIR ONEO2 SENSOR
AND BATTERY PACKS. USE OF NON-GENUINE PARTS OR UNAUTHORISED THIRD PARTY
MODIFIED / REPAIRED PARTS COULD LEAD TO THE FAILURE OF THE UNIT TO OPERATE
AS INTENDED, LEADING TO A DANGER TO LIFE.
5.6.1 REMOVAL OF THE OLD SENSOR-BATTERY PACK.
The 4 corner screws retaining the clear lid of the ONEO2 must be carefully unscrewed (posi-
drive screwdriver No.2) and the lid removed. On some models these screws may be
underneath covers. Using a fine flat bladed screw-driver the covers can gently lifted out to
reveal the screws. Take care to prevent scratching and damaging the lid.
The 4 screws holding the front plate must be unscrewed (posi-drive screwdriver No.1) and
removed. This will expose the PCB and provide access to the sensor and battery pack.
Do NOT pull on the wires of the lead.
Please note that the ONEO2 battery and sensor pack must not be disposed of in general
waste. They can be disposed of in battery recycling bins. Alternatively they can be returned
to Quantum Cryogenics for safe disposal and recycling (please contact QC for returns
authorisation number).

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Figure 5-1 ONEO2 MONITOR WITH LID AND FACEPLATE REMOVED
5.6.2 FITTING THE NEW SENSOR-BATTERY PACK
Check that the `Replace by..’ date of the new sensor and battery being inserted has not
expired.
Carefully insert the connector attached to the red and black wires of the battery pack onto
the black connector of the PCB. The connector is polarised and so can only be fitted one
way round. Do NOT force the two halves of the connector together. Carefully slide the
battery pack into the space adjacent to the PCB. When correctly fitted the two halves of the
connector are held together by the battery pack
Figure 5-2 BATTERY PACK CONNECTION

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Figure 5-3 O2 SENSOR FITTED TO PCB
The sensor should be carefully inserted onto the connector on the ONEO2 PCB. The sensor
is then held in place by the foam pad in the rear of the faceplate. When fitting the sensor IT
IS IMPORTANT TO ENSURE THAT THE SENSOR IS THE CORRECT WAY ROUND AND THE
CORRECT WAY UP. When viewed from below and facing the ONEO2, the white sensor filter
should be visible on the outside.
5.6.3 CALIBRATING AND TESTING AFTER FITTING A NEW SENSOR-BATTERY PACK
After fitting a new ONEO2 sensor and battery pack (or after reconnecting the sensor and
battery pack) the ONEO2 unit must be left for a minimum period of 15 minutes before
accurate balancing, calibration and testing can be performed.
5.6.4 FITTING THE NEW `REPLACE SENSOR-BATTERY PACK BY ...’ LABEL
This label is supplied loose with the replacement Sensor-Battery Pack. The backing paper
should be removed and the self-adhesive label fitted should be fitted directly over the
previous label (so that previous label is completely covered).

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6APPENDIX A –TECHNICAL SPECIFICATION
MECHANICAL
Dimensions
(excl. cable) 82 (H) x 120 (W) x 56 (D) mm.
Weight
Approx. 550 g (0.55 Kg).
Material
Polycarbonate
ENVIRONMENTAL
Temperature
-5°C to +45°C (-20°C to +50°C at lower accuracy).
Humidity
0 to 99% RH non-condensing
IP rating
IP40 AS STANDARD
IP54 INSIDE W-PROOFBOX
Pressure Range
Atmospheric ±10%
ELECTRICAL
Power source
Internal battery (part of ONEO2RS)
TECHNICAL
Standard Alarm Thresholds (Special thresholds available on request)
Low / Critically Low model
Low Oxygen
19.5% oxygen
Critically Low
Oxygen
18.2% oxygen
High / Critically High model
High Oxygen
22% oxygen
Critically High
Oxygen
23% oxygen
High / Low model
High Oxygen
22% oxygen
Low Oxygen
18.2% oxygen
Response time (for correctly calibrated unit)
Typically less than 10 secs. for alarms to
activate when sensor subject to 18%
oxygen test gas
Monitor Indications
Status LED (yellow)
Low oxygen LED (red)
Critical oxygen LED (red)
CAL HIGH LED (green)
CAL LOW LED (green)
Battery LED (red)
Audible alarm (85dB)
Working Lifetime of the ONEO2 Sensor &
Battery Pack
The ONEO2 must be replaced by date
shown on label
RJ45 connection socket on top face for connection only to approved dedicated units.

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7APPENDIX B –QUICK REFERENCE GUIDE
REMOTE
CONNECTION SOCKET
CALIBRATION
BUTTON
ADJUSTMENT SCREW
(RECESSED UNDER
FACE)
LOW BATTERY LED
LOW OXYGEN ALARM
LED
CAL HIGH GREEN LED
CAL LOW GREEN LED
AUDIBLE ALARM
SENSOR FILTER
SERIAL NUMBER AND
SERVICE LABELS
REPLACE BY DATE
LABEL
CRITICALLY LOW
OXYGEN ALARM LED
STATUS LED

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SENSOR
BATTERY PACK
CONNECTOR
BATTERY PACK
CLEAR LID
ENCLOSURE AND PCB
FACEPLATE AND
SCREWS