Comparison of AC-DC Voltage Transfer Standards and 10 mH Inductance Standard
Progress Report
Comparison of AC-DC Voltage Transfer Standards
The standard provided by PTB has been measured at PTB, NCM and again at PRB. The measurements at PTB show, that the standard behaved well and did not suffer from any changes due to transportation. The measurement results have to be evaluated by NCM and Draft A and Draft B reports have to be written.
The claimed uncertainties in the CMC lists can be verified by this comparison.
Comparison of 10 mH Inductance Standard
The standard provided by PTB has been measured at PTB, INM, NCM and again at PTB. The measurements at PTB show, that the standard behaved well and did not suffer from any changes due to transportation. The measurement results have to be evaluated by NCM and Draft A and Draft B reports have to be written.
The claimed uncertainties in the CMC lists can be verified by this comparison.
Comparison of AC-DC Voltage Transfer Standards
The Comparison of AC-DC Voltage Transfer Standards is proposed between two laboratories: NCM, PTB.The ac-dc transfer difference of the travelling standard is to be measured at the voltages 3 V, 10 V and 100 V at the frequencies 55 Hz, 1 kHz, 20 kHz and 100 kHz.
Comparison of 10 mH Inductance Standard
The Comparison of 10 mH Inductance Standard is proposed among three laboratories: INM, NCM, PTB. A 10 mH inductance standard is to be measured at the frequency of 1000 Hz.
The travelling standards will be provided by PTB.
Final Report 2011-06-10
EUROMET.EM-K6.a: Comparison of AC-DC Voltage Transfer Standards (PTB, NCM)
The comparison has been completed and the report can be downloaded here>>
The ac-dc voltage transfer difference of the travelling standard was measured at voltage 3 V and frequencies 1 kHz, 20 kHz and 100 kHz; 55 Hz optionally. The standard provided by PTB was measured at PTB, NCM and again at PTB. Through the PTB measurements, the results of NCM were linked to CCEM-K6.a. The obtained results show very good agreement with the reference value within the expanded uncertainties.
EUROMET.EM-S25: Comparison of AC-DC Voltage Transfer Standards (PTB, NCM)
The comparison has been completed and the report can be downloaded here>>
The ac-dc voltage transfer difference of the travelling standard provided by PTB was measured at voltages 10 V and 100 V and frequencies 55 Hz, 1 kHz, 20 kHz and 100 kHz. The obtained results show very good agreement with the reference value within the expanded uncertainties
EUROMET.EM-K3: Comparison of 10 mH Inductance Standard (PTB, NCM, INM)
The project has been completed and the report can be downloaded here>>
A 10 mH inductance standard was measured at a frequency of 1000 Hz. Through the measurements of the pilot laboratory, the results of NCM and INM were linked to CCEM-K3. The results obtained show very good agreement with the reference value within the expanded uncertainties.