RayTek MI Miniature Infrared Sensor User manual



MI

Miniature Infrared Sensor



Operating Instructions

Rev. F 04/2006

54301



Declaratio nofConformityfortheEuropeanCommunit

y

Thisinstrumentconformsto:

EMC: IEC/EN61326‐1

Safety: EN61010‐1:1993/A2:1995



Contacts

Europe

RaytekGmbH

13127Berlin,Germany

BlankenburgerStr.135

Tel: +4930478008–0

 +4930478008–400

Fax: +49304710251

[email protected]

USA

RaytekCorporation

CA95061–1820,SantaCruz

1201ShafferRd.POBox1820

Tel: +1831458–1110or

 +1800227–8074

Fax: +1831458–1239

automation@raytek.com

UnitedKingdom

Tel: +441908630800

Fax: +441908630900

[email protected]

France

Tel: 0800888244



[email protected]

RaytekChinaCompany

Beijing,China

Tel: +861064392255

Fax: +861064370285

[email protected]



Internet:

http://www.raytek.com/



©RaytekCorporation.

Raytek,theRaytekLogo,andDataTempareregisteredtrademarksofRaytekCorporation.

Allrightsreserved.Specificationssubjecttochangewithoutnotice.



WARRANTY

Themanufacturerwarrantsthisinstrumenttobefreefromdefectsin

material and workmanship under normal use and service for the

period of two years from date of purchase. This warranty extends

onlytotheoriginalpurchaser.Thiswarrantyshallnotapplytofuses,

batteries, or any product that has been

 subject to misuse, neglect,

accident,orabnormalconditionsofoperation.

In the event of failure of a product covered by this warranty, the

manufacturer will repair the instrumentwhen it is returned by the

purchaser, freight prepaid, to an authorized Service Facility within

the applicable warranty period, provided manufacturer’s

examination

discloses to its satisfaction that the product was

defective.Themanufacturermay,atitsoption,replacetheproductin

lieu of repair. With regardto any covered product returned within

theapplicablewarrantyperiod,repairsorreplacementwillbemade

without charge and with return freight paid by the manufacturer,

unless

 the failure was caused by misuse, neglect, accident, or

abnormal conditions of operation or sto rage, in which case repairs

willbebilledatareasonablecost.Insucha case,anestimatewillbe

submittedbeforeworkisstarted,ifrequested.

THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER

WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT

NOT LIMITED TO ANY IMPLIED WARRANTY OF

MERCHANTABILITY, FITNESS, OR ADEQUACY FOR ANY

PARTICULAR PURPOSE OR USE. THE MANUFACTURER

SHALL NOT BE LIABLE FOR ANY SPE CIAL, INCIDENTAL OR

CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT,

TORT,OROTHERWISE.



TABLEOFCONTENTS

1SAFETYINSTRUCTIONS............................................1

2DESCRIPTION ...............................................................3

3TECHNICALDATA ......................................................4

3.1MEASUREMENTSPECIFICATIONS...............................4

3.2OPTICALSPECIFICATIONS ..........................................6

3.3ELECTRICALSPECIFICATIONS ....................................7

3.4ENVIRONMENTALSPECIFICATIONS ...........................8

3.5DIMENSIONS...............................................................9

3.6SCOPEOFDELIVERY .................................................10

4BASICS...........................................................................11

4.1MEASUREMENTOFINFRAREDTEMPERATURE.........11

4.2EMISSIVITYOFTARGETOBJECT................................12

4.3AMBIENTTEMPERATURE .........................................12

4.4ATMOSPHERICQUALITY ..........................................12

4.5ELECTRICALINTERFERENCE ....................................13

5INSTALLATION ..........................................................14

5.1POSITIONING ............................................................14

5.1.1DistancetoObject.............................................14

5.2WIRING.....................................................................15

5.2.1SensorHeadCable ............................................15

5.2.2CablePreparations............................................16

5.3OUTPUTS...................................................................18



5.3.1SignalOutput................................................... 19

5.3.2HeadAmbientTemp./AlarmOutput ............. 20

5.3.3ThermocoupleOutput.......................................22

5.4INPUTSFTC.............................................................. 23

5.4.1EmissivitySetting(analogcontrolled) ............. 24

5.4.2EmissivitySetting(digitalcontrolled) ............. 25

5.4.3AmbientBackgroundTemperature

Compensation ............................................................

26

5.4.4TriggerandHoldFunction............................... 28

5.5CONNECTINGTOTHEPCVIARS232 ...................... 30

5.6INSTALLINGOFMULTIPLES ENSORSVIARS485...... 31

6OPERATION................................................................. 34

6.1CONTROLPANEL ..................................................... 34

6.2SETTINGOFMODES.................................................. 35

6.3SETTINGTHEOUTPUTJUMPER ................................ 35

6.4POSTPROCESSING.................................................... 38

6.4.1Averaging ......................................................... 38

6.4.2PeakHold.......................................................... 40

6.4.3ValleyHold ....................................................... 41

6.4.4AdvancedPeakHold......................................... 42

6.4.5AdvancedValleyHold ...................................... 43

6.4.6AdvancedPeakHoldwithAveraging............... 43

6.4.7AdvancedValleyHoldwithAveraging............ 43

6.5FACTORYDEFAULTS ................................................ 44

7OPTIONS....................................................................... 45



8ACCESSORIES .............................................................46

8.1OVERVIEW ................................................................46

8.2ADJUSTABLEMOUNTINGBRACKET.........................48

8.3FIXEDMOUNTINGBRACKET ....................................49

8.4AIRPURGINGJACKET...............................................50

8.5AIRCOOLINGSYSTEM..............................................52

8.6RIGHTANGLEMIRROR ............................................57

8.7BOXLID ....................................................................58

8.8PROTECTIVEWINDOW .............................................59

9MAINTENANCE..........................................................60

9.1TROUBLESHOOTINGMINORPROBLEMS ..................60

9.2FAIL‐SAFEOPERATION ............................................61

9.3SENSINGHEADEXCHANGE .....................................63

10SOFTWARE.................................................................65

11PROGRAMMINGGUIDE .......................................66

11.1TRANSFERMODES..................................................67

11.2GENERALCOMMANDSTRUCTURE ........................68

11.3DEVICEINFORMATION...........................................69

11.4DEVICESETUP ........................................................70

11.4.1TemperatureCalculation ................................70

11.4.2EmissivitySettingandAlarmSetpoints .......70

11.4.3PostProcessing ...............................................72

11.5DYNAMICDATA.....................................................72

11.6DEVICECONTROL ..................................................73

11.6.1OutputfortheTargetTemperature................73



11.6.2AnalogOutput,Scaling ................................. 73

11.6.3AlarmOutput ................................................. 73

11.6.4Factorydefaultvalues..................................... 73

11.6.5LockMode....................................................... 74

11.6.6ModeSettingfortheDigitalInputFTC3....... 74

11.6.7ChangingtheSensingHeadCalibrationData74

11.6.8AmbientBackgroundTemperature

Compensation ............................................................

74

11.7MULTIPLEUNITS(MULTIDROPMODE,RS485) .... 76

11.8COMMANDSET ...................................................... 77

12APPENDIX...................................................................81

12.1DETERMINATIONOFEMISSIVITY ........................... 81

12.2TYPICALEMISSIVITYVALUES ................................ 83

INDEX ............................................................................... 87

SafetyInstructions

MI 1

1SafetyInstructions

This document contains important information, which should be

keptatalltimeswiththeinstrumentduringitsoperationallife.Other

usersofthis instrumentshouldbegiventheseinstructionswiththe

instrument. Eventual updates to this information must be added to

the original document. The instrument should only be operated by



trained personnel in accordance with these instructions and loca l

safetyregulations.

AcceptableOperation

This instrument is intended only for the measurement of

temperature.Theinstrument is appropriateforcontinuoususe. The

instrument operates reliably in demanding co nditions, such as in

high environmental temperatures, as long as the documented

technicalspecifications

forallinstrumentcomponentsareadheredto.

Compliancewiththeoperatinginstruc tionsisnecessarytoensurethe

expectedresults.

UnacceptableOperation

Theinstrumentshouldnotbeusedformedicaldiagnosis.

ReplacementPartsandAccessories

Use only original parts and accessories approved by the

manufacturer. The use of other products can compromise

 the

operationalsafetyandfunctionalityoftheinstrument.

InstrumentDisposal

Disposal of old instruments should be handled according to

professionalandenvironmentalregulationsaselectronicwaste.

SafetyInstructions

2 MI

OperatingInstructions

The following symbols are used to highlight essential safety

informationintheoperationinstructions:

Helpful information regarding the optimal use of the

instrument.

Warnings concerning operation to avoid instrument

damage.

Warningsconcerningoperationtoavoidpersonalinjury.

Payparticularattentiontothefollowingsafetyinstructions.

Use in 110 /

 230 VAC electrical systems can result in

electrical hazards and personal injury if not properly

protected.Allinstrumentpartssuppliedbyelectricitymust

becoveredtopreventphysicalcontactandotherhazardsat

alltimes.

Description

MI 3

2Description

The miniature infrared sensors MI are noncontact infrared

temperature measurementsystems.Theyaccuratelyandrepeatably

measure the amount of energy emitted from an object and convert

thatenergyintoatemperaturesignal.

Thefollowingoutputsareavailable:

• J‐Thermocouple

• K‐Thermocouple

• 0‐5Volt

• 0‐20mAor

4‐20mA

• 10mV/°Cheadambienttemperaturesignal

• RS232interface

• optional:RS485interface

ThesensingheadisprotectedbyaruggedIEC529(IP65,NEMA‐4)

stainlesssteelhousing,andisconnectedtotheelectronicboxwitha

1m (3ft) cable. Longer cables

 must be ordere d as an option. The

electronic box is separated from the sensing head. This allows the

sensing head to be used in hot environments up to 180°C (356°F)

without cooling. The electronic box can only be used in ambient

temperaturesupto65°C(150°F).

MIwill allowsensing

heads tobe interchanged byprogramming in

the unique calibration data associated with different heads. Take

specialcareforthesensingheadcalibrationdataprintedonthecable!

TechnicalData

4 MI

3TechnicalData

3.1MeasurementSpecifications

TemperatureRange

LT‐40to600°C(‐40to1112°F)

forJ‐Thermocouple:‐25to600°C(‐13to1112°F)

SpectralResponse

LT 8to14μm

ResponseTime

Allmodels 150ms(95%response)

Accuracy

LT ±1%or±1°C(±2°F)whicheverisgreater

LT ±2°C(±

4°F)fortargettemp.<20°C(68°F)

TCoutputs ±1%or±2.5°C(±5°F)whicheverisgreater

Atambienttemperature23°C±5°C(73°F±9°F)

Repeatability

Allmodels ±0.5%or±0.5°C(±1°F)whicheverisgreater

TechnicalData

MI 5

TemperatureResolution

LT ±0.1K(±0.2°F)*

 ±0.25K(±0.5°F)**

*Forazoomedtemperaturespanof300°C(600°F)

**Forthefulltemperaturerangeoftheunit

TemperatureCoefficient

MIC ±0.05KperKor±0,05%/Kwhicheveris

greater,atambient:23

to125°C(73to185°F)

MIH ±0.05KperKor±0,05%/Kwhicheveris

greater,atambient:23to180°C(73to356°F)

MIC,MIH ±0.1KperKor±0.1%perKwhicheveris

greater,atambient:0to23°C(32to73°F)

MID

 ±0.15KperKor±0.15%perKwhicheveris

greater,atambient:0to85°C(32to185°F)

Box ±0.1KperKor±0.1%perKwhicheveris

greater

ThermalShock(within20min.)

LT ±3.5KatΔT

ambient=25K(45°F)

attargettemperatureof50°C(45°F)

Emissivity

Allmodels 0.100to1.100

Transmission

Allmodels 0.100to1.000

TechnicalData

6 MI

3.2OpticalSpecifications

OpticalResolutionD:S

MID,MIC;MIH 22:1(typ.),21:1(guaranteed)

MID,MIC;MIH 10:1

MID,MIC 2:1

At90%energyinminimumanddistance400mm(15.7in.)



Figure1:SpotSizeChart

TechnicalData

MI 7

3.3ElectricalSpecifications

PowerSupply

Voltage 12to26VDC

Current 100mA

Outputs

1.Output(OUT) 0to20mA,or

4to20mA,or

0to5V,or

Thermocouple(JorK)

2.Output(AMB)0to5Voutputforheadambienttemperature

(0to500°C,32to932°F)

oroutputforalarm

relay(softwareenabled,onlyinconjunction

withRS232/485)

mAOutput recommendedlo opimpedancesee

Figure9on

page

19.

0to5VOutputs min.loadimpedance100kΩ(alowerload

impedancedeterioratestheaccuracy)

outputimpedance100Ω

shortcircuitresistant

Thermocouple outputimpedance20Ω

shortcircuitresistant

TechnicalData

8 MI

3.4EnvironmentalSpecifications

AmbientTemperature

MIHsensinghead 0to180°C(32to356°F)

MICsensinghead 0to125°C(32to257°F)

MIDsensinghead 0to85°C(32to185°F)

MIDwithaircooling‐18to200°C(0to392°F)

Electronicsbox 0to65°C(32to150°F)

StorageTemperature ‐10

to85°C(14to185°F)

Rating(Head) IP65(NEMA‐4),notformodelswithan

opticalresolutionof2:1

Rating(Box) IP65(NEMA‐4)

RelativeHumidity 10%to95%non‐condensing

EMC IEC61326‐1

max.cablelength3m(118in.)

Vibration(Head) IEC60068‐2‐6:2

G,10to150Hz,3axes

Shock(Head) IEC60068‐2‐27:50G,11ms,3axes

Weight(Head) 50g(2oz.)with1mcable,stainlesssteel

Weight(Box) 270g(10oz.),die‐castzinc

HeadCableMaterial

MID/MIC PUR(Polyurethane),Halogenfree,

Siliconefree

MIH Teflon

®



Teflon develops poisonous gasses when it comes into

contactwithflames!

TechnicalData

MI 9

3.5Dimensions



Figure2:DimensionsofSensingHead



Standard cable length

1 m (3 ft.)

MID/MIC: Ø 5 mm (0.2 in)

MIH: Ø 3 mm (0.12 in)

2 mounting holes,

Ø 4.5 mm

(

0.17 in

)

TechnicalData

10 MI



Figure3:DimensionsofElectronicBox

3.6ScopeofDelivery

Thescopeofdeliveryincludesthefollowing:

• Sensinghead

• 1mheadcable

• Mountingnut

• Electronicbox

• Operatinginstructions

Basics

MI 11

4Basics

4.1MeasurementofInfraredTemperature

All surfaces emit infrared radiation The intensity of this infrared

radiation changes according to the temperature of the object.

Depending on the material and surface properties, the emitted

radiationliesina wavelengthspectrumofapproximately1to20μm.

Theintensityoftheinfraredradiation(”heatradiation”)isdependent

on

 the material. For many substances this material‐dependent

constant is known. This constant is referred to as the ”emissivity

value”.

Infrared thermometers are optical‐electronic sensors. These sensors

are sensitive to the emitted radiation. Infrared thermometers are

madeupofalens,aspectralfilter,asensor,andanelectronic

signal

processing unit. The task of the spectral filter  is to select the

wavelength spectrum of interest. The sensor converts the infrared

radiation into an electrical signal. The signal processing electronics

analyze the electrical signals and co nvert it into a  temperature

measurement. As the intensity of the emitted infrared radiation is



dependentonthematerial,therequiredemissivitycanbeselectedon

thesensor.

The biggest advantage of the infrared thermometer is its ability to

measure temperature withou t touching an object. Consequently,

surfacetemperaturesofmovingorhardtoreachobjectscaneasilybe

measured.

Basics

12 MI

4.2EmissivityofTargetObject

Todeterminetheemissivityof thetarget objectrefertosection12.1

Determination of Emissivity on page  81. If emissivity is low,

measured results could be falsified by interferinginfraredradiation

from background objects (such as heating systems, flames, fireclay

bricks, etc. close beside  or behind the target object). This type of 

problemcanoccurwhenmeasuringreflectivesurfacesandverythin

materialssuchasplastic

filmsandglass.

Thismeasurement error can be reduced to a minimum if particular

care is taken during installation, and the sensing head is shielded

fromthesereflectingradiationsources.

4.3AmbientTemperature

The sensing head was developed for the following ambient

temperatureranges:

• MIH:0to180°C(32to356°F)

• MIC: 0to125°C(32to257°F)

• MID:0to85°C(32to185°F)

The MID can operate in ambient temperatures up to 200°C (392°F)

withtheair‐coolingaccessory.

4.4AtmosphericQuality

If the lens gets dirty, infrared energy will be blocked and the

instrumentwillnotmeasureaccurately.Itisgoodpracticetoalways

keep the lens clean. The Air Purge Jacket helps keep contaminants

from building up on the lens. If  you use air purging, make sure a

filtered air supply

 with clean dry air at the correct air pressure is

installedbeforeproceedingwiththesensorinstallation.

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RayTek MI Miniature Infrared Sensor, Thermometer MI Miniature Infrared Sensor User manual

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