Profile
Working Group 2.12 is responsible for the maintenance and dissemination of ac voltage ratio and the electric units for capacitance, inductance and ac resistance. The dissemination of ac voltage ratio and the unit of ac resistance is carried out with measuring systems based on inductive voltage dividers and sampling techniques.
Research/Development
The research and development activities of the working group comprise the development of digital and digitally assisted impedance bridges for the calibration of capacitance standards, AC resistors, phase meters and phase standards.
These activities are based on the development of inductive voltage dividers and traceable sampling systems up to 100 kHz.
Services
Tasks
Calibration
The Working Group performs calibrations of standards for accredited laboratories, industry, other national metrology institutes, and for research.
This includes:
| (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) |
| (1 pF to 10 mF, 50 Hz to 1 MHz) |
| (1 pF to 10 mF, 50 Hz to 1 MHz) |
| (1 µH to 100 H, 50 Hz to 1 MHz) |
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)