REED 8778 User manual

REED
Brand
REED
Model
8778
Category
Measuring, testing & control
Type
User manual

REED 8778 is an advanced heat stress meter designed to measure and monitor various environmental factors that can contribute to heat-related illnesses. With its ability to measure Wet Bulb Globe Temperature (WBGT), Black Globe Temperature (TG), Air Temperature (TA), and Relative Humidity (RH), this device provides comprehensive data for assessing heat stress risks in both indoor and outdoor environments.

The WBGT index considers the effects of temperature, humidity, and direct sunlight, making it an ideal tool for evaluating heat stress in outdoor settings such as construction sites, sporting events, and military operations. The TG measurement helps determine the radiant heat load from the sun, while the TA and RH readings provide additional context for understanding the overall thermal environment.

REED 8778 is an advanced heat stress meter designed to measure and monitor various environmental factors that can contribute to heat-related illnesses. With its ability to measure Wet Bulb Globe Temperature (WBGT), Black Globe Temperature (TG), Air Temperature (TA), and Relative Humidity (RH), this device provides comprehensive data for assessing heat stress risks in both indoor and outdoor environments.

The WBGT index considers the effects of temperature, humidity, and direct sunlight, making it an ideal tool for evaluating heat stress in outdoor settings such as construction sites, sporting events, and military operations. The TG measurement helps determine the radiant heat load from the sun, while the TA and RH readings provide additional context for understanding the overall thermal environment.

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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
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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
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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
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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
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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
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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
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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 ...
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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
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
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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.
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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
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REED 8778 User manual

REED
Brand
REED
Model
8778
Category
Measuring, testing & control
Type
User manual

REED 8778 is an advanced heat stress meter designed to measure and monitor various environmental factors that can contribute to heat-related illnesses. With its ability to measure Wet Bulb Globe Temperature (WBGT), Black Globe Temperature (TG), Air Temperature (TA), and Relative Humidity (RH), this device provides comprehensive data for assessing heat stress risks in both indoor and outdoor environments.

The WBGT index considers the effects of temperature, humidity, and direct sunlight, making it an ideal tool for evaluating heat stress in outdoor settings such as construction sites, sporting events, and military operations. The TG measurement helps determine the radiant heat load from the sun, while the TA and RH readings provide additional context for understanding the overall thermal environment.

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