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  5. 8778

REED 8778 User manual

  • Hello! I'm a chat assistant specializing in the Heat Stress Meter 8778. I've read through the user manual and understand how to use the device and what are it's key features like WBGT and heat stress index measurements, settings of alarm threshold, calibration, and the data interfaces. Feel free to ask me any questions you have about its operation or specifications. I'm here to help!
  • What does the WBGT value consider?
    How do I adjust the alarm threshold?
    How long does the meter operate on batteries?
    How the indoor/outdoor measurement is switched?
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Model 8778
Heat Stress
Meter
Instruction
Manual
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com
reedinstruments
www com
2
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Table of Contents
Features ......................................................................................... 3
Specications .............................................................................3-4
Instrument Description .................................................................. 4
Operating Instructions ................................................................5-9
Select display mode .................................................................... 5
IN/OUT switch ............................................................................ 5
Select Unit ..................................................................................5
Alarm Setting ..............................................................................6
Auto Power Off (Sleep Function) ................................................. 6
Calibration ...............................................................................7-8
Troubleshooting .......................................................................8-9
RS232 Interface .......................................................................... 9
Battery Replacement ..................................................................... 9
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com
reedinstruments
www com
3
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Features
• WetBulbGlobeTemperature(WBGT)considerstheeffectsoftempera-
ture,humidityanddirectorradiantsunlight
• HeatStressIndexmeasureshowhotitfeelswhenhumidityiscombined
withtemperature,airmovementandradiantheat
• BlackGlobeTemperature(TG)monitorstheeffectsofdirectsolarradia-
tiononanexposedsurface
• In/OutfunctiondisplaystheWBGTvaluewithorwithoutdirectsun
exposure
• Viewindividualtemperaturesorindicesineither°For°C
• UseradjustableWBGTthresholdwithaudiblealarmifthresholdis
exceeded
• Autopoweroffwithoverride
• Built-inRS232andUSBinterface
• Tripodmountdesignforlong-termmonitoring
Specifications
AirTemp.Range: 0.0to50.0°C(32to122°F)
Accuracy: ±0.6°C(±1.1°F)
BlackGlobeTemp.Range:
 0.0to80.0°C(32to176°F)
Accuracy: ±1°C:15to40°C,±1.5°C:restofrangeforindoor;
 ±1.5°C:15to40°C,±2°C:restofrangeforoutdoor
WBGTTemp.Range: 0.0to50.0°C(32to122°F)
Resolution: 0.1°C(0.1°F)
HumidityRange: 0to100%RH
Accuracy: ±3%RH:10to90%RH,±5%RH:restofrange
Resolution: 0.1%RH
OperatingConditions: 0to50°C,0-95%RH
StorageConditions: -20to65°C,0-95%RH continued ...
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com
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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
PowerSupply: 2xAAAbatteries(included)
PowerConsumption: 1000hours(Alkaline),250hours(Generalpurpose)
Dimensions: 10x1.9x1.1”(254x49x30mm)
BlackBallDimensions:2.95x2.95”(75x75mm)
OptionalAccessories: Tripod(ModelBS-6)
 33%HumidityCalibrationStandard(ModelHR33)
 75%HumidityCalibrationStandard(ModelHR75)
 USBCable&Software(ModelVZUSBAZM)
Instrument Description
LCD Display
WBGT WetBulbGlobeTemperature
TG BlackGlobeTemperature
TA AirTemperature
% RelativeHumidity
C/F Celsius/Fahrenheit
IN Indoor(noSun)
OUT Outdoor(fullSun)
 Lowbatteryindicator
DP/RES1888 Unusediconsinthesemodels
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com
reedinstruments
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5
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Operating Instructions
Pressthe buttontoturnthemeterONorOFF.
AllindicatorsontheLCDscreenwillashwhenyoupoweron.
Slidedownthesensor-protectingsheathbeforetakingameasurement.
Select display mode
ThemetermeasuresTA(AirTemp),TG(GlobeTemp),RH(Relative
Humidity),andcalculatesWBGT.Pressthe buttontoselectthemea-
suringmode.AniconwillappearonthetopoftheLCDscreentoindicate
thecurrentoperationmode(seeFig.A).
IN/OUT switch
TomeasureWBGTwithorwithoutdirectSunexposure,holddownthe
formorethan1secondtoswitch.EitherINorOUTwillthenbedisplayed
ontheLCDscreenindicatingweathertheunitissetforIndoor(noSun)or
Outdoor(fullSun)measuring.
Select Unit
Pressthe and buttonssimultaneouslyinmeasuringmodetoselect
°Cor°F.
Fig. A
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com
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6
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Alarm Setting
Thismeterfeaturesanaudiblealarmtogivewarningforpossibleheat
stressintheenvironment.WhenWBGTvaluereachesthealarmthreshold,
thevaluestartstoblinkandthereisacontinuousbeep.Thealarmstops
whenthemeasuredvaluefallsbelowthethresholdorthemeteristurned
off.Thealarmthresholdisadjustablefordifferentapplications.Whenthe
meterisOFF,holddownthe buttonfor2secondstoturnonthemeter
andenterthealarmsetting.Thecurrentsettingwillbedisplayedwitha
blinkingdigit.Pressthe buttontoincrementthevalueandthe but-
tonfor2secondstoreturntomeasuringmode.Thesettingrangeis20.0
–37.2°C(68-99.0°F).OUTwilldisplayontheLCDscreenifthesettingis
outofrange(seeFig.B).
Auto Power Off (Sleep Function)
ThemeterwillautomaticallypoweritselfOFFafter20minutesofinactivity.
Tooverridethisfunction,whenthemeterisoff,holddownthe and
buttonsfor2seconds.When“n”appearsintheLCDscreen,themeter
isnowinNon-Sleepmode.Whenthemeteristurnedoff,thedefaultwill
revertbacktothedefault(seeFig.C)
Fig. B
Fig. C
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com
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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Calibration
Thismetercanbecalibratedonthehumiditybyenduserswiththe
optional33%and75%saltsolution.Themambientconditionisrecom-
mendedtobeat23+/-2°Candastablehumidity.Userscanterminatethe
calibrationatanytimebypressingthe button.
33% Calibration
Besurethemeteristurnedoff.Unscrewtheblackglobewiththesensor
sheath(seeFig.1).
Plugthesensorprobeintotheoptional33%HumidityCalibration
Standard(ModelHR33)(seeFig.2).Holddownthe , andthe
buttonsfor2secondsuntilblinking“3X.X%”appearsontheLCDscreen.
Themeterisnowcalibratingandwillnishinapproximately60minutes.
Whenthevaluestopsblinking,themeterisdonecalibrating.
75% Calibration
Afterthe33%calibration,plugthesensorprobeintotheoptional75%
HumidityCalibrationStandard(ModelHR75)(seeFig.2).Pressthe
buttontobeginthecalibration,andablinking“7X.X%”willappearonthe
LCDscreen.Themeterisnowcalibratingandwillnishinapproximately
60minutes.Whenthevaluestopsblinking,themeterisdonecalibrating
andwillreturntomeasuringmode.
Fig. 1
Fig. 2
continued ...
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com
reedinstruments
www com
8
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Reassembly
Reassembletheglobewithcautionbyttingthepin(seeFig.3)intothe
connection(seeFig.4).Ithelpstopositionbytargetingthescrewholeson
thesheathandthemeter(seeFig.5).Incorrectinstallationmaydamage
thesensor.
Note:TheRHvaluedifferencebetweenthemeterdisplayandcalibration
standardshouldbewithin+/-0.3%otherwisethecalibrationhasfailed.
Troubleshooting
Power on but no display
Checkthatthebatteriesareinproperlyandinthecorrectpolarity.Take
thebatteriesoutforoneminute,reinstallandretry.
Calibration failure
Checkthebatteryvoltageorreplacethemwithnewbatteries.Check
weatherthesenoriswellpluggedintothesaltbottleandnoaircomesin.
Checkambientcondition.
Fig. 3
Fig. 4
Fig. 5
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com
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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Error message on the display
E2: Thevalueisunderrange/Impropersensorinstallation
E3: Thevalueisoverrange
E4: Thevalueisinerrorbecauseoftheoriginaldata/
Improper sensor installation
E11: RHcalibratorerror,dothecalibrationagain
E32/E33:Circuiterror,contactREEDInstrumentsforrepair
or replacement
RS232 Interface
ThismetercandoPClinkforon-linelogginganddataanalysisviaRS232
interfaceandsoftware.Theprotocolisasfollows:
A. 9600bps,8databids,noparity.
B. Format(TransmittingASCIIcodeeverysecondwhilemeterison
 Wxxx.xC(F):Txxx.xC(F):Txxx.xC(F):Hxx.x%LRCCRLF
Note:the1stvalueisWBGT,the2ndTA,the3rdTG,andthe4thisRH
Battery Replacement
The symbolwillappearonthebottomleftoftheLCDscreenwhenthe
batterypowerislow.Ifthebatteriesarenotreplacedtheaccuracyofthe
readingwillbeaffected.
1. Openthebatterycoveratthebackofthemeterandremovethe
batteries.
2. Insert2newAAAbatteriesandmakesurethebatteriesareinthe
correct polarity.
3. Reinstallthecover.
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com
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10
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Notes _________________________________________
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REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com
/