ROTRONIC Hygrogen2 - Manual (Page 74)

D3: HygroGen2 Uncertainty Framework - Chilled Mirror Reference
23 °C 50 % RH
Temperature sensitivity 3.1 % RH/deg C
Reference Uncertainty source Distribution Value Units Sensitivity Equiv RH Divisor One SD Squares
1 Uncertainty of chilled mirror reference normal 0.200000 °C 3.100000 0.620000 2.00 0.310 0.096
2 Repeatability of humidity normal 0.100000 %rh 1.000000 0.100000 1.00 0.100 0.010
3 Chamber temperature gradients rectangular 0.020000 °C 3.100000 0.062000 1.73 0.036 0.001
4 Temperature stabilisation rectangular 0.005000 °C 3.100000 0.015500 1.73 0.009 0.000
5 Repeatability of temperature normal 0.050000 °C 3.100000 0.155000 1.00 0.155 0.024
6 Humidity stabilisation rectangular 0.050000 %rh 1.000000 0.050000 1.73 0.029 0.001
7 Humidity fluctuations rectangular 0.050000 %rh 1.000000 0.050000 1.73 0.029 0.001
8 Instrument under test (IUT) resolution rectangular 0.050000 %rh 1.000000 0.050000 1.00 0.050 0.003
9 Standard deviation of Ref readings normal 0.050000 %rh 1.000000 0.050000 1.00 0.050 0.003
10 Standard deviation of IUT readings normal 0.100000 %rh 1.000000 0.100000 1.00 0.100 0.010
Reference Sum of squares 0.15
1 See sheet Dew Point UA Standard uncertainty (√
sum of squares)
0.385
2 From Standard Deviation of 10 repeated calibration runs Expanded uncertainty (95% confidence) 0.77
3 Measured temperature gradients from the ROTRONIC HygroGen2 Service
4 Measured stability from the ROTRONIC HygroGen2 Service
5 From Standard Deviation of 10 repeated calibration runs
6 Resolution of ROTRONIC HygroGen2 Control Clip
7 Resolution of ROTRONIC HygroGen2 Control Clip
8 Resolution from manufacturer’s specification
9 Standard Deviation of Ref readings during calibration
10 Standard Deviation of IUT readings during calibration