AEMC CA846 User manual
THERMO-HYGROMETER
TERMO-HIGRÓMETRO
ENGLISH User Manual
ESPAÑOL Manual de Instrucciones
CA846
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Statement of Compliance
Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments
certifies that this instrument has been calibrated
using standards and instruments traceable to
international standards.
We guarantee that at the time of shipping your
instrument has met its published specifications.
An NIST traceable certificate may be
requested at the time of purchase, or obtained
by returning the instrument to our repair and
calibration facility, for a nominal charge.
The recommended calibration interval for this
instrument is 12 months and begins on the date of
receipt by the customer. For recalibration, please
use our calibration services. Refer to our repair
and calibration section at www.aemc.com.
Serial #: ________________________________
Catalog #: 2121.24
Model #: CA846
Please fill in the appropriate date as indicated:
Date Received: _________________________________
Date Calibration Due: _______________________
Chauvin Arnoux®, Inc.
d.b.a AEMC®Instruments
www.aemc.com
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Thermo-Hygrometer Model CA846
1
Table of Contents
ENGLISH.................................................................................................1
ESPAÑOL..............................................................................................13
1. INTRODUCTION............................................................................... 2
1.1 International Electrical Symbols................................................2
1.2 DenitionofMeasurementCategories .....................................3
1.3 ReceivingYourShipment..........................................................3
1.4 OrderingInformation.................................................................3
2. PRODUCT FEATURES ...................................................................... 4
2.1 Description................................................................................4
2.2 PushButtons ............................................................................5
2.2.1 Center(Yellow)FunctionSwitch ...................................5
2.2.2 Back-Light and°C/°FButton ...................................5
2.2.3 MAXButton...................................................................5
2.2.4 HOLDButton ................................................................5
3. SPECIFICATIONS............................................................................. 6
3.1 EnvironmentalSpecications....................................................6
3.2 MechanicalSpecications ........................................................7
3.3 SafetySpecications ................................................................7
4. OPERATION .................................................................................... 8
4.1 Recommendations....................................................................8
4.2 OperatingtheModelCA846 .....................................................8
5. MAINTENANCE ............................................................................... 9
5.1 ReplacingtheBattery ...............................................................9
5.2 Cleaning....................................................................................9
RepairandCalibration...........................................................................10
Technical and Sales Assistance ............................................................10
Limited Warranty ...................................................................................11
WarrantyRepairs...................................................................................11
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Thermo-Hygrometer Model CA846
CHAPTER 1
INTRODUCTION
Warning
• Do not connect to, or touch, any electrical circuit with the
Thermo-Hygrometer.
• Toavoidinjuryorrehazard,donotoperatethisproductinan
explosiveatmosphereorenvironment.
• Remove (unscrew) the protective metal tube covering the
sensorheadwhenusingtheThermo-Hygrometer.
• DonotimmersetheThermo-Hygrometersensorheadintoliq-
uids-thismaycausepermanentdamagetothesensors.
• Screwontheprotectivemetaltubecoveringthesensorhead
whennotusingtheThermo-Hygrometer.
1.1 International Electrical Symbols
This symbol signifies that the instrument is protected by double or reinforced
insulation.
This symbol on the instrument indicates a WARNING and that the operator must refer
to the user manual for instructions before operating the instrument. In this manual,
the symbol preceding instructions indicates that if the instructions are not followed,
bodily injury, installation/sample and product damage may result.
Risk of electric shock. The voltage at the parts marked with this symbol may be
dangerous.
This symbol refers to a type A current sensor. This symbol signifies that application
around and removal from HAZARDOUS LIVE conductors is permitted.
In conformity with WEEE 2002/96/EC
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1.2 Definition of Measurement Categories
Cat. I: Formeasurementsoncircuitsnotdirectly connected totheAC
supply wall outlet such as protected secondaries, signal level,
andlimitedenergycircuits.
Cat. II: For measurements performed on circuits directly connected to
the electrical distribution system. Examples are measurements
onhouseholdappliancesorportabletools.
Cat. III: For measurements performed in the building installation at
the distribution level such as on hardwired equipment in xed
installationandcircuitbreakers.
Cat. IV: For measurements performed at the primary electrical supply
(<1000V) such as on primary overcurrent protection devices,
ripplecontrolunits,ormeters.
1.3 Receiving Your Shipment
Uponreceiving yourshipment, makesure thatthe contentsare consis-
tentwith thepacking list.Notify yourdistributor ofany missingitems. If
theequipmentappearstobedamaged,leaclaimimmediatelywiththe
carrierandnotifyyourdistributoratonce,givingadetaileddescriptionof
anydamage.Savethedamagedpackingcontainertosubstantiateyour
claim.
1.4 Ordering Information
Thermo-Hygrometer Model CA846 ..................................Cat. #2121.24
Includes meter, shockproof holster, 9V battery and user manual.
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Thermo-Hygrometer Model CA846
CHAPTER 2
PRODUCT FEATURES
2.1 Description
TheThermo-HygrometerModelCA846isaportable,compactdigitalmeter
designedforsimplicityandone-handoperation.ThemeterusesanNTC
asthetemperaturesensorprovidingexcellentresponsetimetochanges
intemperature,goodrepeatabilityandaccuratereadings.
TheModelCA846alsoutilizesathin-lmpolymer-capacitivetyperelative
humidity sensor as hygrometer sensor, offering excellent recovery from
100%moistureandfastresponsetimeanddurability.
1.Temperature/humiditysensor
withprotectivesensorcover
2.3½digitdisplay
3.MAXbutton
4.°C/°Fselector&backlight
5.HOLDbutton
6. Power/mode selector
1
2
3 5
6
4
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2.2 Push Buttons
2.2.1 Center (Yellow) Function Switch
TurnsONtheThermo-Hygrometerandselectsthe%RHor°C/°Fsetting.
SlidethebuttontoOFFafteruse.
2.2.2 Back-Light and °C/°F Button
• Pressthe buttontoturntheBack-LightON.
• Pressthe buttonagaintoturntheBack-LightOFF.
• Pressthe buttonfor2secondstochangethetemperaturescaleto
°Cor°F.Thetemperaturescale°Cor°Fisdisplayedinthelowerright
handcornerofthedisplay.
2.2.3 MAX Button
• PresstheMAXbuttontoentertheMAXmode.The“MAX”annunciator
appearsintheupperrighthandcornerofthedisplay.
• Theselectedrange(%RHor°C/°F)recordsandupdatesthemaximum
absolutevalues.
• PresstheMAXbuttonagaintoexittheMAX-recordingmode(“MAX”
goesout).
• TheHOLDbuttonmaybeusedintheMAXmodeto“Freeze”(nolonger
updates)theMAXmeasurementonthedisplay.
2.2.4 HOLD Button
TheHoldbutton“freezes”thereadingonthedisplay.Pressthe“HOLD”
buttontotoggle(activate/release)HOLD.IntheHOLDmode,the“HOLD”
annunciatorisdisplayedintheupperpartoftheLCDdisplayandthelast
readingisdisplayeduntilreleased.
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Thermo-Hygrometer Model CA846
CHAPTER 3
SPECIFICATIONS
3.1 Environmental Specifications
Temperature Scale:Celsius(°C)orFahrenheit(°F)user-selectable
Temperature Sensor: NTC
Measurement Range:-4°to140°F,-20°to60°C
Resolution: 0.1°F/°C
Accuracy: -4° to 32°F ± 2°F (-20° to 0°C ± 1°C)
32° to 140°F ± 1°F (0° to 60°C ± 0.5°C)
Temperature Coefcient:0.1timestheapplicableaccuracyspecication
per°Cfrom0°to18°Cand28°to50°C(32°to64°Fand82°to122°F)
Humidity Sensor:Electroniccapacitancepolymerlmsensor.
(Thesensorisunaffectedbywatercondensation,andisimmunetomost
reagentvapors)
Measurement Range: 0% to 100% RH
Resolution: 0.1% RH
Accuracy (@ 25°C): 10%-90% RH ± 5.0%
0%-10% RH; 90% to 100% RH ± 10.0%
Sensor Response Time for 90% of Range:60stypical
Sensor Stability:±2%RH,2yearstypical
Sensor Hysterisis (10% to 90% to 10% RH):±1%RHtypical
Sensor Temperature Dependence:
Negligiblefrom32°to140°F(0°to60°C)
Operating Temperature:
32° to 122°F (0°C to 50°C) at < 80% RH
Storage Temperature:
-4°to140°F(-20°to60°C),0to80%RHwithbatteryremoved
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Accuracy:
Statedaccuracyat23°C±5°C,<90%RH
Altitude: 2000m max
3.2 Mechanical Specifications
Display:
3½digitliquidcrystaldisplay(LCD)withmaximumreadingof1999
Over-Range:“OL”isdisplayed
Low Battery Indication: The isdisplayedwhenthebatteryvoltage
dropsbelowtherequiredlevel
Sample Rate: 2.5timespersecond,nominal
Input Protection:
24VDCor24Vrmsmaximuminputvoltageonanyinput
Power Supply:
Standard9Vbattery(NEDA1604,IEC6F22006P,orequivalent)
Battery Life:
200hourstypicalwithcarbonzincbattery
Dimensions:
6.81 x 2.38 x 1.5" (173 x 60.5 x 38mm)
Weight:
Approx7oz(197g)includingbattery
3.3 Safety Specifications
EN61010-1(1995-A2),ProtectionClassIII
OvervoltageCategory(CATIII,24V),PollutionDegree2
Indoor Use
*All specications are subject to change without notice
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Thermo-Hygrometer Model CA846
CHAPTER 4
OPERATION
4.1 Recommendations
• Forreliablemeasurements,letthereadingsstabilize.Thehygrometer
andtemperaturesensormustreachequilibriumwiththemediummea-
sured.
• Avoid temperature measurement errors induced by too short mea-
surementtime,sunshineduringthemeasurement,heating,coldouter
walls,airdraft(e.g.fans),radiatingsourcesincludinghandand/orbody
heat,etc.
• Avoidhumiditymeasurementerrorsinducedbysteam,watersplashes,
drippingwaterorcondensationonthesensor,etc.
• Avoidsensorcontaminationinducedbyparticlesintheairormeasure-
mentsinpowderlikesubstances.Contaminationmaybeavoidedby
measuringthroughalter(usersupplied).Theltermustbecleaned
orreplacedperiodically,dependinguponthedegreeofcontamination
atthemeasurementsite.
4.2 Operating the Model CA846
1. Unscrewtheprotectivemetaltubecoveringthesensor.
2. Setthepowerswitchtothedesired%RHor°C/°Frange.
3. Letthereading(s)stabilize(%RHtakesatleast60secondstoreach
90%).
4. Readthedisplay.
5. Afteruse,screwtheprotectivemetaltubebackontothesensor.
6. TurntheinstrumentOFFwhennished.
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