Land P80P User manual

Landcal Blackbody Source
Type P80P Operating Instructions
Page 14
Land Infrared
Dronfield
Sheffield S18 6DJ
England
Telephone: [phone]
Facsimile: [phone]
Email: [email protected]
© Land Infrared, 2001
Land Infrared
10 Friends Lane
Newtown, PA 18940-1804
U.S.A.
Telephone: [phone]
Facsimile: [phone]
Email: [email protected]
Publication Nº: PP970311
Part Nº: 198.031
Issue B/0801
Operating
Instructions
Landcal Blackbody Source
Type P80P

Operating Instructions Landcal Blackbody Source
Type P80P
Page 15
SAFETY INFORMATION
EN 61010-1 Symbol identification
Symbol Publication Description
IEC 417, Nº 5031 Direct current
IEC 417, Nº 5032 Alternatingcurrent
IEC 417, Nº 5033 Both direct and alternating current
IEC 617-2, Nº 02-02-06 Three-phasealternatingcurrent
IEC 417, Nº 5017 Earth (ground) terminal
IEC 417, Nº 5019 Protective conductor terminal
IEC 417, Nº 5020 Frame or chassis terminal
IEC 417, Nº 5021 Equipotentiality
IEC 417, Nº 5007 On (Supply)
IEC 417, Nº 5008 Off (Supply)
IEC 417, Nº 5172 Equipmentprotectedthroughoutbydoubleinsu-
lationorreinforcedinsulation(equivalenttoClass
II of IEC 536)
ISO 3864, Nº B.3.6 Caution, risk of electric shock
ISO 3864, Nº B.3.1 Caution
BS EN 100015 Observe precautions for handling electrostatic
dischargesensitive devices
BS EN 60825: 1992 Warning, laser radiation
ThisproductcomplieswithcurrentEuropeandirectivesrelatingtoelectromagneticcompatibility
andsafety(EMCdirective89/336/EEC;Lowvoltagedirective73/23/EEC).

Landcal Blackbody Source
Type P80P Operating Instructions
Page 16
Contents
1.0 INTRODUCTION 1
2.0 DESCRIPTION 2
3.0 SPECIFICATION 3
4.0 ELECTRICALSUPPLY 4
5.0 COMMISSIONING 5
5.1 Inspectiononreceipt 5
5.2 ConnectionstomainsSupply 5
5.3 Heatingup/coolingdownofthesource 5
5.4 UsingtheRS232serialinterfaceport 5
6.0 USINGTHESOURCE 6
6.1 Introduction 6
6.2 Measuringsensor(Platinumresistancethermometer)-ifsupplied 6
6.3 Operationofthesourceatbelowambienttemperature 6
7.0 CALIBRATIONOFRADIATIONTHERMOMETERS 7
7.1 Preparation 7
7.2 Thermometercalibration 7
7.3 Accuracyofcalibration 7
7.4 Calibrationprocedures 8
8.0 MAINTENANCE 9
8.1 Incorrectoperation/failure 9
8.2 NAMAScertification 9
8.3 Storageandtransportationcase 9
9.0 EUROTHERM2216OR2416TEMPERATURECONTROLLER 10
9.1 UserGuide 10
9.2 AlteringtheSetpoint 11
9.3 AlteringtheRampRate 11
9.4 Altering the Power Limit (when applicable) 11
9.5 ° to °F conversion 11
9.6 Altering the communication address 12

Operating Instructions Landcal Blackbody Source
Type P80P
Page 17

Operating Instructions Landcal Blackbody Source
Type P80P
Page 1
1.0 INTRODUCTION
The LANDCAL blackbody source type P80P is a variable temperature, portable black body radiation source
designed for use at temperatures up to 80°C (175°F).
The source is a primary standard black body for the high precision calibration of radiation thermometers over
therange-10to80°C(15to175°F). Whenthesetpointtemperatureisreached,theoutputfromthethermometer
under test is compared with the temperature of the source as measured by an optional Platinum resistance
thermometer whose calibration is traceable to National Standards.
When used in conjunction with the Platinum resistance thermometer which is supplied complete with a UKAS
(United Kingdom Accreditation Service) calibration certificate, high precision is obtained. Alternatively the
source can be used in three other ways.
(i) If traceability to National Standards is required to a larger value of uncertainty a UKAS certificate of
calibration for the source can be supplied. The relationship between the indicated temperature on the
controllerandtheradiancetemperatureasmeasuredbyasecondarystandardradiationthermometeris
reported.
(ii) Thetemperatureofthesourcecanbemeasuredbyusingaradiationthermometeroftraceablecalibration.
This method of calibration can be described as calibration by comparison with a standard radiation
thermometer. Thismethodofcalibrationusuallyresultsinthemostaccurateaserrorsduetotemperature
gradientsandnon-blackbodyconditionsareeliminated.
(iii) IftraceabilitytoNationalStandardsisnotrequired,thesourcecanbeusedwithoutanycertification. From
previouswork thetemperature, asshown onthe controllerindication, hasbeenfoundtoagree withthe
radiancetemperaturetowithin±4K(±8°F).
Thesourceprovidesawideangletargetwhichmakesitidealforusewithbothfixedinstallationandportable,hand-
heldthermometers.
TomaketheliningupofLANDfixedinstallationradiationthermometerssimpler,anopticalbenchassemblyisoffered
asanoptionalextra. Whenthesourceisstoodontheoptionaltransportationcase,thebenchtomidtargetdimension
equalsthatoftheopticalbenchassembly.

Landcal Blackbody Source
Type P80P Operating Instructions
Page 2
2.0 DESCRIPTION
The LANDCAL blackbody source type P80P comprises a cylindrical closed end tube (cavity) approximately
160mm/6.3inlongwith aninternaldiameter of50mm(2.0in). The cavityismanufactured fromAluminiumwhich
is blackened and the closed end is angled at 120° to increase the emissivity value.
The cavity is heated or cooled using Peltier elements. The temperature is controlled by a platinum resistance
thermometerconnectedtoa3-termdigitalcontrollerhavinga±0.1°Cor±0.1°Fresolution.
An optional standard platinum resistance thermometer possessing a traceable (UKAS - United Kingdom
Accreditation Service) Certificate is inserted into the cavity from the front of the source and used to determine
the true (radiance) temperature.
Fig.1 LandcalBlackbodySourceTypeP80P CA970256

Operating Instructions Landcal Blackbody Source
Type P80P
Page 3
3.0 SPECIFICATION
Maximum working temperature: 80°C (175°F)
Recommended temperature range: -10 to 80 °C (15 to 175°F)
Stability: Withthesourcecontrollingattemperaturetheradiancetemperature
willvarybylessthan±0.5K(±1°F)overa30minuteperiod.
Heatingrate: (Ambientto75°C) 60minutes
Coolingrate: (20°Cto-10°C) 90minutes(dependentonambient)
Radiationcavity: Material: Aluminiumwithblack,hightemperaturerefractorycoating
Design: 120°cone
Innerdiameter: 50mm(2.0in)
Internallength: 155mm(6.1in)
Benchtotubecentreheight: 100mm(2.5in)
Emissivity: >0.995
Controller: Type: Eurotherm 2216 or 2416 with RS 232 serial interface
Input: Resistance thermometer
Measuring sensor Type: Platinum Resistance Thermometer (UKAS certified)
(if supplied) Length: 450mm (17.7in) plus 2m (78.7in) cable
Diameter: 6mm outer diameter, inconel sheath
Uncertainty: <±0.1°C at 50°C
Part Nº: 135.142
Electrical supply: 220/240V a.c. 50 to 60 Hz. Part No. 135.181
110/120V a.c. 50 to 60 HZ. Part No. 135.199
Powerconsumption: 0.2KVA(220/240Voperation)
Overalldimensions: Height: 185mm(7.3in)
Width: 260mm(10.2in)
Depth: 315mm(12.4in)
Weight: Nett: 11kg(24lb)
Gross: 13kg(29lb)
NOTE
The controller fitted to the furnace is configured for °C operation. If °F operation is
required, details of how to re-configure the controller can be found in the controller
OperatingInstructions.

Landcal Blackbody Source
Type P80P Operating Instructions
Page 4
4.0 ELECTRICAL SUPPLY
TheP80Pissuppliedwitharemovableelectricalsupplycable. ThecablehasanIECstyleconnectorononeendthat
matestoaninteratedpowerentrymodule.
Thecolourcodeforthecableis:
Brownlead Live
Bluelead Neutral
Green/Yellowlead Earth
Thesourcemaybeconnecteddirectlytoa5ampfusedplugandsocket.
ThewiringdiagramoftheP80PisgiveninFig.2.
Fig.2 WiringdiagramfortheLandcalBlackbodySourceTypeP80P CA970219

Operating Instructions Landcal Blackbody Source
Type P80P
Page 5
5.0 COMMISSIONING
5.1 Inspection on receipt
Physically examine all items for damage that may have occurred during transit. Check the contents against the
packing note.
If any item has been damaged in transit this should be reported to the carrier and to the supplier immediately.
Donotreturn damagedinstrumentsto thesenderas thecarrierwill notthenconsider aclaim. Savethe packing
with the damaged article for inspection by the carrier.
5.2 Connections to mains Supply
Connect the brown lead to live, blue to neutral and green/yellow to earth. When connected to the mains supply
and switched on an indicator will light. At no time should any panels be removed when this mains indicator is
on.
5.3 Heating up/cooling down of the source
The source can be operated at any temperature in the range -10°C/15°F to 80°C/175°F. Set the controller to
the required value as follows:-
(i) When the source is switched on, the fluorescent indicator panel displays the measured value (upper
display) and the set point value (lower display).
(ii) To raise or lower the setpoint value, depress the respective up/down button. After a short delay, the
setpoint will change in the required direction. Release the up/down button when the required
temperature value is reached.
NOTE
All other control parameters are factory set and locked. For correct operation, it should not
be necessary to adjust any other parameters.
5.4 Using the RS232 serial interface port
Connect the source to the personal computer (PC) as shown in Table 1.
Source. 9 pin 'D'
connector
Controller
terminal Function
PC connector
25 pin 9 pin
Terminal 2 HE Rx (receive) Terminal 2 Terminal 3
Terminal 3 HF Tx (transmit) Terminal 3 Terminal 2
Terminal 5 HD Comm Terminal 7 Terminal 5
Table 1 P80P to PC serial communications (RS232) connection schedule

Landcal Blackbody Source
Type P80P Operating Instructions
Page 6
6.0 USING THE SOURCE
6.1 Introduction
TheP80Phasbeen designedtocreateanenclosureofuniformtemperature,ideal forthecalibrationofradiation
thermometers. The cone point of the cavity is placed in the area of minimum gradients within the source. When
calibratingradiationthermometersthetargetsizerequirementsofthethermometershould,wheneverpossible,be
fulfilledbythecone. Ifthethermometerviewsthewallsofthecavityresultsofgreateruncertaintywillbeachieved.
6.2 Measuring sensor (Platinum resistance thermometer) - if supplied
ProvisionhasbeenmadetomeasurethetemperatureofthetargetblockusingaPlatinumresistancethermometer
whichcanbeinsertedfromthefrontofthesourceintothecavity. Whenplacedinthemeasuringpositionthejunction
liesinthesameplaneastheconepoint,butisapproximately40mm/1.5inbelow. Thetemperatureofthesourceas
measuredbythesensoragreeswiththeconepointradiancetemperaturetowithin±0.5K(1°F).
Theoutputfromthesensorshouldbemeasuredonanindicatorordigitalvoltmeterhavingaresolutionof0.1°C.
Thisistherecommendedwaytoobtainthetruetemperatureofthetargetcavity. Thetemperatureindicationonthe
controllershouldnotbeusedasanaccuratemeasurementoftargetcavitytemperature.
6.3 Operation of the source at below ambient temperature
TheLANDCALBlackbodySourcetypeP80PusesPeltiermodulestocoolthesourcetotemperaturesaslowas-10°C/
15°F. Howeverthemodulesareratedasonlyachievinga30°C(55°F)belowambientcoolingeffect. Thismeansthat
thefinalcoolingtemperatureachievedandthelengthoftimeittakestoachievethistemperaturewillbedependent
ontheambienttemperature. Forexampleifthesourceisoperatedinanareawithambienttemperatureof30°Cthe
minimumachievabletemperaturewillbeapproximately0°C.
Condensationmayoccurinsidethecavitywhenthesourceisusedattemperaturesbelowambientandabove0°C. This
willinnowayaffecttheoperationorperformanceofthesource. Attemperaturesbelow0°Cthiscondensationwill
freeze and form a thin layer of ice. This ice formation will not affect the performance of the source. If prolonged
operation(saylongerthan8hourscontinuous)attemperaturesbelowambientareanticipated,itisrecommendedthat
thecavityispurgedwithadryinertgassuchasNitrogentoprevententryofwatervapourintothecavity.