Takex HDA300A - Page 3

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■Takenoteofthereflection.
Ifthedetectionobject(heatedmaterial)islargeandheatedtoa
hightemperature,theradiationmaybereflectedontherollers,
manipulator,sideguideoftheline,etc.whenthematerial
approachesandthereceivermaybeactivatedevenifthematerial
isoutsideofthedetectionfieldofview.
Theeffectofthisreflectiondependsonthestateofthereflection
surface,typeoftheheatedmaterial,locationofthereceiver,etc.
howeverthereflectionmaybecomeequivalenttotheheatedmaterial
of500to700℃ifitisaslargeasaningotorslab,etc.Insucha
place,installthereceiversoastoensurethatthereflectionsurfaces
suchasrollers,etc.areoutofthedetectionfieldofview.
■Externallight
Visiblelightraysarecompletelycutoff.Howeverdonotinstallthe
receiverinalocationwhereraysofsunlight,incandescentlamps,etc.,
whichhaveaninfraredrange,entersthereceiverdirectlyorbyreflection.
Ifitisunavoidabletoinstallinalocationthatmaysubjecttoexternallight,
usealightshieldingplate(ironplate,etc.)forblockingthelight.
・・Examplesofmeasuresagainstexternallight・・
Ex.1）
Lightshieldingplate(inthiscase,
ensurethatthereisnoeffectof
thereflectionfromtheheated
materialasdescribedabove)
INSTALLATIONLOCATION11
Heatedmaterialtemperature-receivedlightenergyratio
Thisdatashowshowthereceivedlightenergy(receivedlightintensity)
changesagainstthetemperatureoftheheatedmaterialchanges.
Itisusedforcalculatingthemarginofthedetectionheatedmaterial.
TakethedataforHD301Aasanexample.Itshowsthatwhen
thedetectionheatedmaterialtemperatureisat600℃,approx.60times
higherreceivedlightenergy(receivedlightintensity)canbeobtained
comparedtothedetectionheatedmaterialtemperatureat370℃.
Alsoitmeansthatwhentheheatedmaterialtemperatureisat800℃,
approx.6timeshigherreceivedlightenergy(receivedlightintensity)can
beobtainedcomparedtothedetectionheatedmaterialtemperatureat600℃.
Minimumdetectionobjectdiameter
Indicatesthethickness(diameter)ofthedetectionheatedmaterial
againsttheheatedmaterialtemperature.Forexample,whenHD301Ais
usedasthereceiver,thelowestdetectabletemperatureofasteelbar
ofφ20isapprox.440℃atasettingdistanceof1m.
Thedataonlyreferstospecificsettingdistance.Forothersetting
distances,multiplytheratioofeachsettingdistance(ratiowith
referencetotherespectivesettingdistancedata)bythediameterof
thedetectionheatedmaterialinthedata.Forexample,whenHD301A
isusedatadistanceof2m,multiplythediameterofthedetectionheated
materialinthedataby2,sincethesettingdistance2misdouble1m.
DATA12
●
Approximately2secondselapsefrompowerONuntiltheinternalpower
stabilizes,duringwhichtimethereisnooutput.
●
Thecordlengthshouldbenomorethan2mforHD502F.Forothersensors,
thecordlengthshouldbenomorethan20m.
●
Avoidanyusesituationswherethepowersupplyisbeingrepeatedlyturned
ONandOFF.
●
Theinternalrelaycannotbereplaced.Forextendedrelaylife,usethesensor
unitviaanauxiliaryrelay.
●
 TheremaysometimesbeamomentaryoutputatpowerOFF,andthisisnormal.
●
 ThebendingradiusoftheGT2Seriesfiberopticunitshouldbenolessthan50R.
●
ThetighteningtorqueofthehexagonalsocketcapboltoftheHD301A/
HD601Nseismicplatformshouldbeasfollows:
M5:nomorethan3.7N・mless,M6:nomorethan6.4N・m
●
ScrewtighteningtorqueforHD400(mainbody)
ThetighteningtorqueofM4screwshouldbenomorethan0.6N・m.
●
ScrewtighteningtorqueforHD502F(mainbody)
ThetighteningtorqueofM2.3shouldbenomorethan0.3N・m.

Fiberunithandlingprecautions

○
Donotexcessivelybendthefiberunit
Thefiberunitusesglass(optical)fibers.  Anexcessivelysmallbendingradiuscan
damagethesefibers.Ensurethatthespecifiedbendingradiusorgreaterisused.
○
Donotpullthefiberunit
Avoidforcedpullingortwistingofthefiberunit.Maintainanappropriate
clearancearoundthefiberunit.
○
Avoidmovingthefiberunit
Thefiberunitcontainsapproximately1500glassfiberfilaments (50μmindiameter)
bundledtogether.Frequentmovementofthefiberunitcancauseabrasionand
damagetothefibers,andeventualbreakageofthefiberscouldresult.
PRECAUTIONS13
Ex.2）
Asdescribed,installing
thereceiveratahigher
locationreducesthe
effectofthe
externallight.
500 600 700 800 900 1000
1
2
3
4
5
7
10
20
30
40
50
70
100
500 600 700 800 900 1000 1100
1
2
3
5
7
10
20
30
50
Ratioofenergyofreceivedlight
W/W
300 400 500 600 700 800 900 1000
1
2
3
5
7
10
20
30
50
70
100
200
300
500
1000
Temperatureofheatmaterial（℃）
Temperatureofheatmaterial（℃） Temperatureofheatmaterial（℃）
Temperatureofheatmaterial（℃）
Ratioofenergyofreceivedlight
W/W
Ratioofenergyofreceivedlight
W/W
Ratioofenergyofreceivedlight
W/W
400 500 600 700 800 900
1
2
3
4
5
7
10
20
30
40
50
70
100
GT205
GT22
GT23
300 400 500 600 700 800 900 1000
3
4
5
7
10
20
30
40
50
70
Temperatureofheatmaterial（℃）
Temperatureofheatmaterial（℃）
Temperatureofheatmaterial（℃） Temperatureofheatmaterial（℃）
Setdistance100mm
Setdistance50mm
Setdistance20mm
Diameterofdetectedheatmaterial
φmm
Diameterofdetectedheatmaterial
φmm
Diameterofdetectedheatmaterial
φmm
Diameterofdetectedheatmaterial
φmm
500 600 700 800 900
1
2
3
4
5
7
10
20
30
40
50
HD502FThelowestdetectionheatmaterialdiameter
400 500 600 700 800
1
2
3
4
5
7
10
20
30
GT205
GT22
GT23
GT205
GT22
GT23
HD400Thelowestdetectionheatmaterialdiameter
400 500 600 700 800
2
3
4
5
7
10
20
30
40
50
100
HD301A HD601NHD301A HD601N
Setdistance1m
Setdistance0.5m
Setdistance1m
Setdistance0.5m
Setdistance1m
Setdistance0.5m
Setdistance1m
Setdistance0.5m
Detectingdistance50
Detectingdistance50mm
Detectingdistance100
Detectingdistance100mm
HD601NHD301A
370℃
430℃
560℃
650℃
HD502FHD400