Fluke
Fluke 5698-25 Working Standard SPRT
Manufacturer: Fluke Calibration
Model: 5698-25
Features
- Conforms to ITS-90 SPRT guidelines
- Drift rate typically 0.003 °C
- Calibration options by fixed point
- Unmatched performance-to-price-ratio
Specifications
| Specification | Details |
|---|---|
| Temperature Range | –200 °C to 670 °C |
| Nominal RTPW | 25.5 Ω (± 0.5 Ω) |
| Current | 1.0 mA |
| Resistance Ratios | W(234.315 K) ≤ 0.844235 W(302.9146 K) ≥ 1.11807 |
| Sensitivity | 0.1 Ω/°C |
| Drift Rate | < 0.006 °C/100 hours at max temperature (typically < 0.003 °C) |
| Self-heating at TPW | < 0.002 °C under 1 mA current |
| Reproducibility | ± 0.0015 °C or better |
| RTPW Drift After Thermal Cycling | < 0.001 °C |
| Diameter of Pt Sensor Wire | 0.07 mm (0.003 in) |
| Protective Sheath | Quartz Glass Diameter: 7 mm (0.28 in) Length: 485 mm (19.1 in) |
