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Kit completi

TEST&

MEASUREMENTS

218x series

Working Reference Secondary StandardResistance Thermometers

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Eurotron - One of the leaders in high technology equipments: high accuracy calibrators - non-contact IR thermometers - portable flue gas analyzers.

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Resistance thermometer Pt100

Rugged, accurate and reliable

working standard

Excellent stability andrepeatability

Strain-free reference grade

platinum element

Temperature range up to 600C

3 or 4-wires construction

GeneralThe International Temperature Scale (ITS 90)designates the standard platinum resistancethermometer as the interpolation instrument up tothe freezing point of silver (1234.93K or 961.78C).Full ITS accuracy requires expensive, fragilePrimary Standard laboratory thermometers to beused as 1st Line standards.Platinum resistance thermometers for routine highaccuracy measurement and calibration, classifiedas Secondary or Reference Standards, accomplishboth accuracy and practical demands of moderatecost and high reliability.

The Eurotron Working Standard thermometersseries 2180 meet the repeatability and stabilityrequirements of most industrial metrologylaboratories and incorporates features, such as verylow self heating, Inconel or Ker710 sheaths,insensitivity to pressure. and hermetically sealedplatinum sensors.

The sheath and handle provide for a ruggedinstrument and may be used in all fluid mediacompatible with Inconel or Ker 710.

These standard thermometers are equipped with 3 or4 leads so that the error due by lead resistance willbe effectively compensated when using a suitablemeasuring device.

Report of CalibrationThe measurement uncertainties of the data shown inthe Eurotron Calibration Report are:

0C : 0.10 C100C : 0.15 C

On request a thermometer can be calibrated andsupplied with a SIT Report of Calibration on fivepoints.The calibration will be made using a comparisonmethod in the appropriate temperature range.A computer compiled resistance temperature tablecan be generated using the constants providedtogether with the Report of Calibration.

The measurement uncertainties of the data shownon the SIT Report are:

from 0C to 250C : 0.05 Cfrom 250C to 600C : 0.1 C

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Sonde di prelievo gas

eurotron

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Published specifications may change without notice.

Sensitive portion

Resistance element

Sensor anealing

Construction

The platinum resistor is located within the first 30 mm ofthe sheath tip.To minimize conduction errors, the Working Standardshould be immersed into a suitable depth.In general the depth is dependent on the temperatureand the medium being measured.

A minimum depth of 120 mm is recommended.

The resistance element is of pure platinum, coiled andmounted in a strain-free construction.The former is of pure alumina material to avoid wirecontamination.

All joints are welded to minimize resistance changes.The leads are brought to a handle assembly where theyare connected to a low loss 2 meters cable.

Before final inspection and certification the sensor ispre-aged through temperature cycles to removemechanical stress and therefore to improve long termstability.

Two models are available using respectively Inconel 600(model 2180) and high purity allumina Ker710 (model2182).The model 2182 uses platinum internal connection wiresinstead of silver alloy that, in combination with the highpurity allumina external protective tube (Ker710), avoidsensor contamination and therefore improve the longterm stability of the sensor.

Automatic Calibration SystemThe MicroCal T can be used together with a PersonalComputer, a multifunction high precision calibratorMicroCal 200/200+ (see bulletin 08-44), a WorkingStandard Thermocouple and a CalpMan Windowssoftware package to improve a true automatictemperature calibration system.Using the RS232 interfaces of the instruments it ispossible to program through the PC the complete testprocedure for Your thermocouple or resistancethermometer to be certified. The MicroCal 200 is able toread the testing thermoelement with the accuracyrequired and the software elaborate the Report of

Calibration.

Specifications!

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Resistance element:

Temperature coefficient:

Temperature range:

Nominal lenght:

Insulation resistance:Self heating coefficient:

Time constant:

Stability:

Length of sensor winding:External protecting tube:

Connecting cable:

Immersion length:

Wire insulation:Handle:Net Weight:

Platinum 100 0.05C at 0C

= 0,003850

Model 2180: -80C to +450CModel 2182: -80C to +600C500 mm

>1000 M 100 Vdc at 25Cin air in motion at V= 1m/s

0.03C/mWin air in motion at V = 1 m/s

t50 = 30 s t90 = 95 sin water in motion at V=0.4 m/st50 = 3 s t90 = 8 s

Drift less than 0.05% of its initial Ro valueafter ten temperature cycles from 0C to maximumtemperature and from -80 to 0C

25 mm6 mm external diameter

Inconel 600 for model 2180. High purity allumina Ker 710for model 2182

2 meter Teflon cable with additionalshield

recommended 120 mm at uniformtemperature

MgOAluminium with serial number indication

0.3 kg

Wa

W

Note:Custom modelsavailable on request.

Ordering Code

Table A Temperature range

Table B Model

Table C Options

cat. 218A - B - C

0 Pt100 Inconel 600: up to 450C2 Pt100 Ker710: up to 600C

3 3 wires connection cable

0 Eurotron report on 2 points: 0C and 100 C1 SIT report on 5 points (from 0C to 450/600C)2 SIT Tabulation each 1C.

4 4 wires connection cable

3 Wooden protecting caseEE880001 (see note

below)

Note: The wooden protecting case is strongly recommended for asuitable protection during transport and storage. It is mandatory forcat. 2182.

MicroCal T100, T500 & T1100Temperature calibrators

MicroCal 200 signal calibrator

eurotron

EUROTRON Italiana S.r.l.V.le F.lli Casiraghi 409/413I 20099 Sesto S. Giovanni (MI)tel. +39-02 248820.1 fax +39-02 2440286

Distribuited by:

Complementary productsWorking Standard Thermocouples :

MicroCal Multifunction Calibrator:

Temperature calibration furnaces:

cat. 2160: up to 1400C - Tc type Scat. 2163: up to 1100C -

Indicator-Simulator Tc, Rtd, mV, V, mA, Hz,up to 0.005% accuracy.

MicroCal T100: from -30 to +150 CMicroCal T500: from Amb. to 600 CMicroCal T1100: from 200 to 1100 Ccat. F8180: (black body furnace for Infraredthermometers up to 1250 C)

Tc type K