ROTRONIC Hygrogen2 - Manual (Page 73)

D2: HygroGen2 Uncertainty Framework - External RH Probe
Input values: 23 °C 80 % RH
Temperature sensitivity 4.96 % RH/deg C
Reference Uncertainty source Distribution Value Units Sensitivity Equiv RH Divisor One SD Squares
1 Uncertainty of reference probe normal 0.900000 %rh 1.000000 0.900000 2.00 0.450 0.203
2 Repeatability of humidity normal 0.100000 %rh 1.000000 0.100000 1.00 0.100 0.010
3 Reference drift rectangular 1.000000 %rh 1.000000 1.000000 1.73 0.577 0.333
4 Reference resolution rectangular 0.050000 %rh 1.000000 0.050000 1.73 0.029 0.001
5 Chamber temperature gradients rectangular 0.020000 °C 4.960000 0.099200 1.73 0.057 0.003
6 Gradients through probe stem rectangular 0.100000 °C 4.960000 0.496000 1.73 0.286 0.082
7 Temperature stabilisation rectangular 0.005000 °C 4.960000 0.024800 1.73 0.014 0.000
8 Repeatability of temperature normal 0.050000 °C 4.960000 0.248000 1.00 0.248 0.062
9 Humidity stabilisation rectangular 0.050000 %rh 1.000000 0.050000 1.73 0.029 0.001
10 Humidity fluctuations rectangular 0.050000 %rh 1.000000 0.050000 1.73 0.029 0.001
11 Instrument Under Test (IUT) Resolution rectangular 0.050000 %rh 1.000000 0.050000 1.00 0.050 0.003
12 Standard deviation of Ref readings normal 0.050000 %rh 1.000000 0.050000 1.00 0.050 0.003
13 Standard deviation of IUT readings normal 0.100000 %rh 1.000000 0.100000 1.00 0.100 0.010
Reference Sum of squares 0.71
1 From calibration certificate - check uncertainty at input values Standard uncertainty (√
sum of squares)
0.843
2 From Standard Deviation of 10 repeated calibration runs Expanded uncertainty (95 % confidence) 1.69
3 Drift between two successive calibrations of the reference instrument
4 Resolution from manufacturer‘s specification
5 Measured temperature gradients from the ROTRONIC HygroGen2 Service
6 Stem conduction
7 Measured stability from the ROTRONIC HygroGen2 Service
8 From Standard Deviation of 10 repeated calibration runs
9 Resolution of ROTRONIC HygroGen2 Control Clip
10 Resolution of ROTRONIC HygroGen2 Control Clip
11 Resolution from manufacturer‘s specification
12 Standard Deviation of Ref readings during calibration
13 Standard Deviation of IUT readings during calibration