Profile
Working Group 2.12 is responsible for the maintenance and dissemination of ac voltage ratios and the electric units for ac resistance.
The dissemination of ac voltage ratios and the unit of ac resistance is carried out with measuring systems based on inductive voltage dividers and sampling techniques. Typical measurement voltages up to 10 V at frequencies up to 5 kHz are used.
Research/Development
Services
Tasks
Calibration
The Working Group performs calibrations of standards for accredited laboratories, industry, other national metrology institutes, and for research.
Based on the ac voltage ratio and ac resistance measurement capabilities several standard are calibrated which include:
| (1 V bis 100 V, 25 Hz bis 5 kHz) |
| (1 V bis 10 V, 225 Hz bis 5 kHz) |
| (1 V, 25 Hz und 75 Hz ) |
| (10 V, 400 Hz und 1 kHz) |
| (10 V, 400 Hz) |
| (0,1 V bis 7 V, 10 Hz bis 1 kHz) |
| (2 mV bis 5 V, 0,3 Hz bis 5 kHz) |
| ( 0,1 Ω bis 100 kΩ, 400 Hz) |
Assessment of calibration laboratories for electrical quantities on behalf of the German Accreditation Body
Calibration laboratories are assessed on behalf of the German Accreditation Body (DAkkS).
Consultation
The working group provides expert advice in the field above mentioned metrology of ac voltage ratios.
Measurement capabilities
Link to the calibration and measurement capabilities (available in German only)