1. Press PWR to turn the meter ON. The display will cycle
2. The meter will count down from “9999” to “8888” and so on
3. If there is no HCHO gas present the display
4. Press HOLD to freeze the current reading on
5. Press HOLD to resume measurement.
6. Press MAX/MIN to enter Maximum/Minimum Mode and
on. “MAX” will display.
7. Press MAX/MIN to display the minimum reading since the
meter was turned on. “MIN” will display.
8. Press MAX/MIN to display the TWA for the last 8 hours, or
since the meter was turned on. “TWA” will display.
9. Press MAX/MIN to display the STEL for the last 15 minutes.
10. Press MAX/MIN to display the 1-hour weighted average.
ReinstallBattery
Temperatureunit℃Savedunit(℃or℉)ReFactSet
AutoPoweroffYESReFactSet
HCHOAlarmONReFactSet
HCHOAlarmValue0.08ppmSavedValue
MAX/MIN/TWA/STEL/1hr
ReadingsCalculatedSincepowerON
POWER:
ShortpressPWRbuttontoturnonthemeterandlongpressPWRbuttontoturnoffthemeter.
Therearetwowaystoprovidepower:(a)AAAbatteriesx4pcs,or(b)AC/DCadaptor.
(a) Batteryiconshowsupwhenpowerisweak,usershouldreplacewithnewbatteriesimmediatelyasthe
readingsonLCDarealsoincorrectduetoweakpower.
(a) Forshorttimemeasurement,youmaypoweronbybatteries.Forloggeruserorlongtimeusing,you
mustconnectwithanAC/DCadaptorforlongtimeuse.
MEASUREMENT:
Innormalmeasurementmode,turnonthemeter,ittakescoupleminutestowarmupduetoHCHOsensor’s
characteristic,displayshowsooooo,afterwarmingupthemeter,HCHOshows0.00ppmiftheenvironmentisno
HCHOgasexisted,TemperatureandHumidityreadingsshowinterchangeablyonsecondlayerofscreen.Ifbatteries
wereinstalledforcoupleminute,poweronthemeter,countdownisactivatingimmediately.
AUTOPOWEROFF:
Meterwillturnoffautomaticallyin15minuteswhennouse,todisableautopowerofffunctionbypressingHOLD
andPWRbuttonswhenpowerisoff,“n”showsonscreen,thenreturnstonormalmeasurement.Meterdefaults
autopoweroff.Forlongtimelogging,pleaseremembertodisableautopowerofffunction.
MAX/MIN/TWA8hr/STEL15min/1Hr:
PressMAX/MINbuttontoreviewmaximumorminimumorTWA(TimeWeightedAveragein8hours),STEL
(Short‐TermExposureLimitin15minutes)and1Hrweightaveragereadingssincepoweredon.
2015.06V14
Duringthismode,longpressHOLDbuttontoclearallmaximum,
minimumvalues,nowallparametersshowcurrentreading,
now“CLr”showsatthebottomofLCDin2seconds,then
automaticallyreturntonormalmeasurementmode,meter
restartstomemorymaximumorminimumreadingsince
lastclearactionisdone.OnceconcentrationofHCHO
exceedscurrentmaxvalues,readingswillbeupdated.
CHANGETEMPERATUREORHCHOUNIT:
ShortpressUnitbuttontochange℃or℉ofambienttemperature.LongpressUnitbuttontotoggletheHCHOunit
(ppmormg/m3),wheninmg/m3mode,theicon“ppm”ontheLCDwilldisappear.
SETALARMANDBEEPER:
Themeterdefault0.08ppmasHCHOalarmthresholdfordifferentapplication,longpressSETbuttontoenteralarm
thresholdsetting,pressHOLDbuttontoincreasevalue,pressBKLTtodecreasevalue,pressMODEbuttontomove
toleftdigit,pressMAX/MINbuttontomovetorightdigit.LongpressSETbuttontosavethechanges,screenshows
“SAVE”andbacktonormalmeasurement.
Whilesettingalarm,”SET”showsonbottomofscreen.Aftersetupthealarmthreshold,belliconwillshowon
thetopcorner.Oncethereadingexceedsthethresholdvalue,beepsoundisalarmed;shortpressPWRbuttonto
turnoffbeeper,belliconwilldisappearonthescreen.ShortpressPWRagaintoactivatealarmfunction.
HOLD:
Pressthebuttontofreezecurrentreadingsonscreenduringnormal
measurementmode.UnderHOLDfunction,MAX.MINdisplayistemporarilyvoid,
Thebuttonisalsousedtoincreasethevaluewhilesettingupalarmthreshold.
HCHOUnitSelection
TemperatureUnitSelection