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

[Title]
Title='Calibration of a type N thermocouple at 1000 °C'
Description=6
Description[0]='A type N thermocouple is calibrated by comparison with two reference'
Description[1]='thermocouples of type R in a horizontal furnace at a temperature of 1000 °C.'
Description[2]='The emfs generated by the thermocouples are measured with a digital voltmeter'
Description[3]='through a selector/reversing switch. All thermocouples have their reference'
Description[4]='junctions at 0 °C. The thermocouple to be calibrated is connected to the'
Description[5]='reference point using compensating cables.'

[Model]
Model=2
Model[0]='V_X = V_iX + \delta\V_iX1 + \delta\V_iX2 + \delta\V_R + \delta\V_LX + \delta\t_X / C_X - \delta\t_0X / C_X0;'
Model[1]='\delta\t_X = t_X - t_0;'

[Components]
CompOrder=3
Comp=12
Comp[0]=V_X_
Comp[1]=V_iX_
Comp[2]=\delta\V_iX1_
Comp[3]=\delta\V_iX2_
Comp[4]=\delta\V_R_
Comp[5]=\delta\V_LX_
Comp[6]=\delta\t_X_
Comp[7]=C_X_
Comp[8]=\delta\t_0X_
Comp[9]=C_X0_
Comp[10]=t_X_
Comp[11]=t_0_

[COMP 0]
Type=Result
Definition='emf of the thermocouple to be calibrated'
Unit='µV'
Description=0
Fcov=2
NomUnit=
UncUnit=
CovID=1
UncID=0
Vnom=36267.2307692308
Ustd=24.9662506362208
Neff=52
HB=1
HC=0
HR=1
IO=0

[COMP 1]
Type=TypAPooled
Definition='indication of the voltmeter'
Unit='µV'
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 voltage of the thermocouple to be cailbrated. In order to'
Description[4]='evaluate the uncertainty of measurement associated with the observation, a'
Description[5]='series of ten measurements has been previously undertaken at the same'
Description[6]='temperature of operation. It gave a pooled estimate of standard deviation for'
Description[7]='the voltage of the thermocouple.'
Observations=1
Sp=1.6
Neff=9
Reading=1
Reading[0]=36248
Mode=0
MinObs=1

[COMP 2]
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
Fcov=2

[COMP 3]
Type=TypBRectang
Definition='oltage corrections 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 mV at each indication.'
Vnom=0.0
Hlim=0,5

[COMP 4]
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 5]
Type=TypBRectang
Definition='voltage correction due to the compensating cables'
Unit='µV'
Description=3
Description[0]='COMPENSATING CABLES: The compensating cables have been investigated in the'
Description[1]='range 0 °C to 40 °C. From this the voltage differences between the cables and'
Description[2]='the thermocouple wires are estimated to be within ±5 µV.'
Vnom=0.0
Hlim=5

[COMP 6]
Type=Temp
Definition='deviation of the temperature of the calibration point from the temperature of the furnace'
Unit='°C'
Description=2
Description[0]='CORRECTION OF THE CALIBRATION POINT: Deviation of the temperature of the'
Description[1]='calibration point from the temperature of the furnace.'
Fcov=2
NomUnit=
UncUnit=
CovID=0
UncID=0
Vnom=0.5
Ustd=0.641
Neff=50
HB=0
HC=0
HR=0
IO=0

[COMP 7]
Type=Const
Definition='sensitiviy of the thermocouple for voltage at the measuring at the 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=0,026

[COMP 8]
Type=TypBRectang
Definition='temperature correction due to the deviation of the reference temperature of 0 °C '
Unit='°C'
Description=2
Description[0]='REFERENCE TEMPERATURES: 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=Const
Definition='sensitiviy of the thermocouple for voltage at the measuring at the 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=0,039

[COMP 10]
Type=TypBNormal
Definition='temperature of the furnace'
Unit='°C'
Description=2
Description[0]='TEMPERATURE OF THE FURNACE: The temperature of the furnace is evaluated in a'
Description[1]='second analysis named temperature'
Vnom=1000.5
Uexp=0.641
Fcov=1.0

[COMP 11]
Type=Const
Definition='nominal termperature of the calibration point'
Unit='°C'
Description=2
Description[0]='CALIBRATION POINT: The nominal termperature of the calibration point is 1000.0'
Description[1]='°C.'
Vnom=1000.0

[Correlations]
Description=0