GasLab SAN-20 User manual

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Personal Oxygen
Safety Monitor
User Manual
SAN‐20
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Copyright © 2018-2019 GasLab.com. All Rights Reserved 2
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TableofContents
INTRODUCTION.....................................................................................................................................3
FEATURES................................................................................................................................................3
APPLICATIONS.......................................................................................................................................3
THEORYOFOPERATION.....................................................................................................................4
MONITOR..................................................................................................................................................4
LCDDISPLAY...........................................................................................................................................4
OPERATION.............................................................................................................................................5
1.Powerbutton .............................................................................................................................5
2.TemperatureUnitsSwitchingButton ...........................................................................................5
3.MenuandConfigurationStatus.........................................................................................................5
4.Calibration........................................................................................................................................6
5.AlarmThreshold...............................................................................................................................6
6.AutomaticAtmosphericPressureCompensation...............................................................................6
7.Mandownalarm..............................................................................................................................7
7.ResetButton.....................................................................................................................................7
MAINTENANCE.......................................................................................................................................7
Calibration............................................................................................................................................7
CleaningandStorage............................................................................................................................7
SPECIFICATIONS....................................................................................................................................8
TROUBLESHOOTING.............................................................................................................................9
OXYGENRECOMMENDEDLEVELS....................................................................................................9
SUPPORT..................................................................................................................................................9
Warranty..............................................................................................................................................9
ContactUs............................................................................................................................................9
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Copyright © 2018-2019 GasLab.com. All Rights Reserved 3
INTRODUCTION
CongratulationsonyourpurchaseofthisCO2MeterSAN‐20PersonalSafety02Monitor.
CO2MeterSAN‐20isapersonalsafety02monitordesignedtomonitorambientoxygenlevelsinrealtime.
Itisdesignedtoprotectworkersinconfinedspaces.SAN‐20isshippedfullytestedandfactorycalibrated
and,withproperuse,willprovideyearsofreliableservice.
FEATURES
 Fluorescence‐basedOpticalOxygenSensor
 Highaccuracyandlonglife
 Hasnegligiblecrosssensitivitytoothergases
 Audible,visualstrobeandvibratingalarms
 LargeLCDdisplay
 Ruggeddesignwithprotectiverubberenclosure
 Heavydutymetalclip
 Frontfacingsensorunit
 RechargeableBattery4.2v,1500mAh
 MicroUSBcableandwallUSBcharger
 RechargeableLi‐Ionbattery–18+hourspercharge
 Mandownalarm‐leveragingaccelerometertechnology
 Calibrationmethods:AmbientAir(20.9%)
 AutomaticatmosphericpressurecompensationforO2concentrations
 Noover‐exposureornegativememoryeffects
APPLICATIONS
 StoredGasesinConfinedSpaces.Industrialuseofstoredorpipedgasescreatesthepossibilitythat
oxygeninbreathableaircouldbedisplacedbygasessuchasnitrogen,helium,argonorcarbondioxide
resultinginahazardouscondition.
 Underground Tunnels, Caves or Mines. Over time oxygen can be displaced by other naturally
occurringgaseslikecarbondioxide,carbonmonoxide,ammonia,methane and the oxidation of
sulfidesresultinginloweroxygenlevelsthanisrequiredforpersonalsafety.
 CombustioninConfinedSpaces.Combustionfirstusesuptheavailableoxygen,thenproducespartial
oxidationofcarbon(carbonmonoxide),hydrogencyanide,andnitrogenoxides.Hydrogengascan
alsobeproducedanddisplaceoxygen.
Pleasetakeamomenttoreadtheseinstructionsbeforeuse.Theywillprovideyouwithallthe
necessaryinformationforthecorrectuseofyouroxygenmonitor.
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Copyright © 2018-2019 GasLab.com. All Rights Reserved 4
THEORYOFOPERATION
TheSAN‐20PersonalSafetyO2Monitordeterminestheconcentrationofoxygeninairsamplesusingthe
principleoffluorescencequenchingbyoxygen.Airreachesthesensorbydiffusingthroughtheopenings
oftheunit.Normalairmovementisenoughto carrythe sample tothesensor.Ithas negligible cross
sensitivitytoothergases.Themonitorbenefitsfromlowpoweroperationwhileprovidingamuchlonger
lifetimeduetothenon‐depletingsensingprinciple.
MONITOR
1. Visualalarm/strobe
2. Frontfacingsensor
3. Chargingindicator
4. LCDdisplay
5. Powerbutton
6. Temperatureunits
switchingbutton
7. USBcharginginlet
(bottomside)
8. Heavydutymetalclip
9. Factoryresetbutton
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LCDDISPLAY
1. Dangerlowoxygenalarmindicator
2. Warninghighoxygenalarmindicator
3. Batteryindicator
4. O2concentration
5. O2concentrationunits(%)
6. Calibrationicon
7. Mandownalarm
8. AirTemperature
9. Temperatureunit
(Fahrenheitorcentigradedegrees)
10. %RelativeHumidity

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OPERATION
Note:LCDBacklightwillturnoffautomaticallyafter5secondsofinactivity.WhenLCDbacklightisoff,
presseitherbuttontoturnonthebacklight.Itwillnotturnthemonitorofforchangethe°C/°Fsetting.
1.Powerbutton 
a. WhentheMonitoristurnedoff,press toturnontheunit.
b. WhentheMonitoristurnedon,press for3secondstoturnofftheunit.
Whentheunitisfirstturned on, it performs5secondscountdownforMonitorwarmup,thenenters
normaldisplaywithcurrentO2,temperature,andhumidityreadingsdisplayed.Themonitorstartstaking
measurementswhenpoweronandupdatesreadingsevery2seconds.Thedevicecan’tshutoffthealarm,
ifpoweroffwillcomebackinalarmmodeandmustdelay.
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2.TemperatureUnitsSwitchingButton 
Press shortlytoswitchtwotemperatureunits:°Fand°C.
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3.MenuandConfigurationStatus
Bypressingthetemperatureunitswitchingbutton for5seconds,theunitentersintoMenustatus.
There are three menu items by pressing the temperature unit switching button shortly to loop
switchingbetweenAIR,AON/AOFFandE(exit).
Themenuitemsaredescribedinthefollowingtable.
MenuItems FunctionalDescription
AIR “AIR”meansAmbientAirCalibration.Userpressesthepowerbutton to
implementAmbientAirCalibration(20.90%).
AON/AOFF
SettingMandownalarmfunctionon/off.Userpressesthepowerbutton
toswitch“AON”(allowingMandownalarm)or“AOFF”(prohibitingMan
downalarm).
E Userpressesthepowerbutton toexitthemenustatus.
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Copyright © 2018-2019 GasLab.com. All Rights Reserved 6
4.Calibration
ThereisonecalibrationmethodforAmbientAirCalibration(20.90%).
Bypressingthetemperatureunitbutton for5seconds,themonitorwillenterO2calibrationmode.
While in calibration mode, press the temperature button quickly to switch to AIR (Ambient Air
Calibration).Pressthepowerbutton toconfirm.
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5.AlarmThreshold
TheSAN‐20isequippedwithaudible,visualandvibrationalarmstoalertyouwhentheambientoxygen
concentrationexceedseitherofthetwofactorypresetalarmlevels:
 DangerLowOxygenAlarm:19.5%‐LEDwillflashandaudiblealarmwillsound3x/sec.
 WarningHighOxygenAlarm:23.5%‐LEDwillflashandaudiblealarmwillsound2x/sec.
Toalertusersinnoiseenvironment,aninnervibratorwillvibrateat1HzinbothOxygenAlarm.
Normal atmosphere contains between 20.8%and 21% oxygen. OSHA defines any atmosphere that
containslessthan19.5%oxygenas“oxygendeficient”andanyatmospherethatcontainsmorethan23.5
percentoxygenas“oxygenenriched.”Theselevelsarefactorysetandcannotbechanged.
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ATTENTION! ‐ IF A WARNING OR DANGER ALARM IS
TRIGGEREDWHILEUSINGTHEINSTRUMENTASASAFETY
MONITOR LEAVE THE AREA AND SEEK FRESH AIR
IMMEDIATELY. REMAINING ON SITE UNDER SUCH
CIRCUMSTANCESCANCAUSESERIOUSIMPAIRMENTOR
EVENLEADTODEATH.
6.AutomaticAtmosphericPressureCompensation
TheO2measurementisaffectedbyatmosphericpressureoraltitudechanging.Whenusersareathigh
altitude,compensationshouldbemadetoassuremaximummonitoraccuracy.
ThisdevicehasautomaticatmosphericpressurecompensationforO2concentrationsbymeansofabuilt‐
inbarometricpressuresensor.
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Copyright © 2018-2019 GasLab.com. All Rights Reserved 7
7.Mandownalarm
Fallingbybreathingdangerousgasescancauseseriousinjuryandevenfatalitytoworkers.IftheMan
downalarmfunctioninSAN‐20isseton,SAN‐20candetectfallsandsendamandownalertwhichwill
activatetheaudibleandvisualalarmsandalertotherpeopleinthearea.

Theman‐downdetectionusesathree‐axisaccelerometertoautomaticallymonitortheuser’smovements
inordertoidentifyasuddenfall/impactandalackofmovementforaperiodof6seconds.
Oncealert,peoplecanturnoffthecurrentman‐downalarmbypressinganyoneofthetwobuttons.
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7.ResetButton
Userscanresettheunitbypushingaresetbuttonthroughaholeonbackofshell.

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MAINTENANCE
Calibration
TheSAN‐20comespre‐calibratedfromthefactory.However,theO2sensorshouldbecalibratedatleast
onceayear,orasdescribedinyourcompany’ssafetyprocedures.Youcanperformthecalibrationyourself,
oryoucanreturnittoCO2Meterforfactorycalibrationatanominalfee.
Thetemperatureandhumiditysensorsdonotrequirecalibrationandshouldremainaccurateforthelife
ofyourunit.
CleaningandStorage
Applysparinglywithasoftclothandallowtodrycompletelybeforeusing.DonotusesoaporAlcohol
cleaning.Donotusearomatichydrocarbonsorchlorinatedsolventsforcleaning.

Copyright © 2018-2019 GasLab.com. All Rights Reserved 8
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SPECIFICATIONS
DeviceSpecifications
OperatingEnvironment 32°F~122°F(0°C~50°C),<95%RHnon‐condensing
Storage 14°F~140°F(‐10°C~60°C),<99%RHnon‐condensing
PowerSupply Li‐ionbattery(4.2V,1500mAh),MicroUSBcablew.WallUSBcharger
Dimensions 3.9x2.0x1.7Inch(98x50x42mm)
Weight 4.76oz.(135grams)

O2SensorSpecifications
MeasurementRange 0to25.0%vol.
Resolution 0.01%vol.
ResponseTime <15s
Accuracy Betterthan2%FS
Lifetime >5years

TemperatureSensorSpecifications
TemperatureRange 14~140°F(‐10.0~60.0°C)display
DisplayResolution 0.1°F(0.1°C)
DisplayOptions °F/°Cswitchable
Accuracy ±0.9°F(±0.5°C)
ResponseTime 5~30seconds(devicemustequilibratewithenvironment)

RelativeHumiditySensorSpecifications
MeasurementRange 0.0~99.9%RH
DisplayResolution 1%RH
Accuracy ±4.5%RH
ResponseTime <8secondsfor63%ofstepchange
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Copyright © 2018-2019 GasLab.com. All Rights Reserved 9
TROUBLESHOOTING
Symptom/Issue PossibleCause/Resolution
Cannotpoweron PressthePowerButtonformorethan5seconds
CheckthattheLi‐ionbatteryischarged
Ifmonitorischargedbutwillnotturnon,contactsupport
Readingdoesnotchange Infreshair,youwillrarelyseeoxygenlevelschange.Thisisnormal.

OXYGENRECOMMENDEDLEVELS
 >23.5% Oxygenenriched,presentssignificantfireandexplosionrisk
 20.8‐21% Normaloxygenlevelinfreshair
 19.5%  Lowestsafeoxygenlevellimit(OSHA) 
 <16%  Headache,nausea,difficultyperformingmanualtasks
 <12%  Difficultybreathing,impairedcoordinationandperception
 <10%  Poorjudgementandbluishlips
 <8%  Fatalwithinminutesifnottreated
 <6%  Fatalin40seconds
SUPPORT
Warranty
The monitor comes with a one (1) year warranty starting from the date the monitor was shipped
to the buyer. For more information visit our website: https://GasLab.com/pages/terms-conditions
ContactUs
We are here to help! For information or technical support, please contact us.
[email protected]
[phone]
www.GasLab.com
GasLab, Inc.
131 Business Center Drive Ste 3
Ormond Beach, FL 32174 USA