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General physics
Geographical location
In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2 Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Costa Rica, LACOMET (Laboratorio Costarricense de Metrologia)
Items for disseminating ITS-90 and PLTS 2000,
Temperature:-20 °C to 50 °C
Thermistors
Absoluteexpanded uncertainty:8 mK
Comparison stirred alcohol and water baths
Temperature : 20 °C ± 2 °C
Relative humidity : 55 % ± 10 %/rh
Approved on17 January 2013
Institute service identifier : LACOMET-02-2.2.3
Hygrometers,
Humidity:-30 °C to 20 °C
Dew-point hygrometer
Absoluteexpanded uncertainty:9.0E-2 °C
Uncertainty table
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This metrology area covers the fields of DC and AC measurements, impedance, electric and magnetic fields, radiofrequencies and measurements on materials.