The company maintains close ties with – Germany’s national metrology institute – and often incorporates PTB-traceable calibration directly into its instruments. 3. Core Product Portfolio 3.1 Standard Resistors (Reference Resistors) Cpci messtechnik is best known for its high-precision, oil-sealed or hermetically sealed standard resistors .
| Model family | Resistance values | Stability (per year) | TCR (ppm/K) | Application | |--------------|------------------|----------------------|-------------|--------------| | | 1 Ω – 10 kΩ | ±0.5 ppm | < 1 ppm | Primary lab standards | | SRH series (hermetic) | 100 Ω – 100 kΩ | ±1 ppm | < 2 ppm | Transfer standards | | SRT series (temperature-stabilized) | 25 Ω – 10 kΩ | ±0.2 ppm | < 0.5 ppm | Automated calibration systems | cpci messtechnik
| Parameter | Value | |-----------|-------| | Resistance range | 0 Ω to 200 kΩ | | Accuracy (ratio) | ±0.2 ppm to ±1 ppm (depending on model) | | Excitation | AC or DC, reversible polarity | | Measurement modes | 4-wire, current reversal, offset compensation | | Interfaces | USB, RS-232, Ethernet, IEEE-488 (GPIB) | | Software | Windows-based logging with PTB-traceable correction tables | The company maintains close ties with – Germany’s