[Header]
Format=SMU
ver=3
appl=GUMWB32
MR=0
FUEB=0

[Title]
Title='Calibration of a type N thermocouple at 1000 °C: Furnace temperature'
Description=6
Description[0]='In the N-type thermocouple calibration at 1000 °C the temperature of the'
Description[1]='furnace is determined by two R-type thermocouples placed the same distance'
Description[2]='above and below the thermocouple two be calibated. The tempearture at the'
Description[3]='location of the hot junction of the thermocouple to be calibrated is given as'
Description[4]='the mean of the temperatures of the hot junction of the two reference'
Description[5]='thermocouples.'

[Model]
Model=1
Model[0]='t_X = t_S + \delta\t_S + C_S × (\delta\V_iS1 + \delta\V_iS2 + \delta\V_R) - C_S / C_S0 × \delta\t_0S + \delta\t_D + \delta\t_F'

[Components]
CompOrder=3
Comp=11
Comp[0]=t_X_
Comp[1]=t_S_
Comp[2]=\delta\t_S_
Comp[3]=C_S_
Comp[4]=\delta\V_iS1_
Comp[5]=\delta\V_iS2_
Comp[6]=\delta\V_R_
Comp[7]=C_S0_
Comp[8]=\delta\t_0S_
Comp[9]=\delta\t_D_
Comp[10]=\delta\t_F_

[COMP 0]
Type=Result
Definition='temperature to be measured of the furnace '
Unit='°C'
Description=0
Fcov=2
NomUnit=
UncUnit=
CovID=1
UncID=0
Vnom=1000.5
Ustd=0.640870516811861
Neff=7688
HB=1
HC=0
HR=1
IO=0

[COMP 1]
Type=TypAPooled
Definition='temperature of the reference thermometer in terms of voltage with cold junction at 0 °C. The function is given in the calibration certificate.'
Unit='°C'
Description=8
Description[0]='MEASUREMENTS: The indications of the voltmeter are precalculated to reduce the'
Description[1]='effects of temperature drift in the thermal source and parasitic thermal'
Description[2]='voltages (see EAL-R2-S1:S5.15). The readings are combined to one observation'
Description[3]='only, which is the temperature of the furnace at the location of the'
Description[4]='thermocouple to be cailbrated. In order to evaluate the uncertainty of'
Description[5]='measurement associated with the observation, a series of ten measurements has'
Description[6]='been previously undertaken at the same temperature of operation. It gave a'
Description[7]='pooled estimate of standard deviation for the temperature of the furnace.'
Observations=1
Sp=0.10
Neff=9
Reading=1
Reading[0]=1000,5
Mode=0
MinObs=1

[COMP 2]
Type=TypBNormal
Definition='correction of the temperature of the reference thermocouples due to their calibration '
Unit='°C'
Description=4
Description[0]='REFERENCE STANDARDS: The reference thermocouples are supplied with calibration'
Description[1]='certificates that relate the temperature at their hot junction with their cold'
Description[2]='junction at 0 °C to the voltage across their wires. The expanded uncertainty of'
Description[3]='measurement at 1000 °C is U=0,3 °C (coverage factor k=2 )'
Vnom=0.0
Uexp=0.3
Fcov=2

[COMP 3]
Type=Const
Definition='sensitivities of the reference thermocouples for voltage at the measuring temperature of 1000 °C'
Unit='°C/µV'
Description=2
Description[0]='VOLTAGE SENSITIVITIES: The voltage sensitivities of the thermocouples have been'
Description[1]='taken from reference tables'
Vnom=0,077

[COMP 4]
Type=TypBNormal
Definition='voltage correction obtained from the calibration of the voltmeter'
Unit='µV'
Description=4
Description[0]='CALIBRATION OF THE VOLTMETER: The voltmeter has been calibrated. Corrections to'
Description[1]='the measured voltages are made to all results. The calibration certificate'
Description[2]='gives a constant expanded uncertainty of measurement for voltages smaller than'
Description[3]='50 mV of U=2 µV (coverage factor k=2)'
Vnom=0.0
Uexp=2.0
Fcov=2.0

[COMP 5]
Type=TypBRectang
Definition='voltage correction due to the limited resolution of the voltmeter'
Unit='µV'
Description=2
Description[0]='RESOLUTION OF THE VOLTMETER: A 4½ digit microvoltmeter has been used in its 10'
Description[1]='mV range resulting in resolution limits of ±0,5 µV at each indication.'
Vnom=0.0
Hlim=0.5

[COMP 6]
Type=TypBRectang
Definition='voltage correction due to contact effects of the reversing switch'
Unit='µV'
Description=2
Description[0]='PARASITIC VOLTAGES: Residual parasitic offset voltages due to the switch'
Description[1]='contacts have been estimated to be zero within ±2 µV.'
Vnom=0.0
Hlim=2.0

[COMP 7]
Type=Const
Definition='sensitivities of the reference thermocouples for voltage at the reference temperature of 0 °C'
Unit='°C/µV'
Description=2
Description[0]='VOLTAGE SENSITIVITIES: The voltage sensitivities of the thermocouples have been'
Description[1]='taken from reference tables.'
Vnom=0.189

[COMP 8]
Type=TypBRectang
Definition='temperature correction due to the deviation of the reference temperature from  0 °C'
Unit='°C'
Description=2
Description[0]='REFERENCE TEMPERATURE: The temperature of the reference point of each'
Description[1]='thermocouple is known to be 0 °C within ±0,1 °C.'
Vnom=0.0
Hlim=0.1

[COMP 9]
Type=TypBRectang
Definition='change of the values of the reference thermometers since their last calibration due to drift'
Unit='°C'
Description=2
Description[0]='DRIFT OF THE REFERENCE STANDARDS: From previous calibrations the drift of the'
Description[1]='reference standards are estimated to be zero within the limits ±0,3 °C.'
Vnom=0.0
Hlim=0,3

[COMP 10]
Type=TypBRectang
Definition='temperature correction due to non-uniformity of the temperature of the furnace'
Unit='°C'
Description=3
Description[0]='TEMPERATURE GRADIENTS: The temperature gradients inside the furnace have been'
Description[1]='measured. At 1000 °C deviations from non-uniformity of temperature in the'
Description[2]='region of measurement are within ±1 °C.'
Vnom=0.0
Hlim=1

[Correlations]
Description=0