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Accurate for the lab yet rugged and portable enough for the field
- - Best-performing dry block (accuracy, stability, uniformity) in the world
- - Immersion depth up to 8 inches
- - Optional ITS-90 reference sensor input reads PRTs to ±0.006 °C
- - Models with Temperature ranges from -45 °C to 700 °C
With groundbreaking new proprietary electronics from Fluke Calibration's (patents pending), dry block Metrology Wells let you bring lab-quality performance into whatever field environment you may work in. New analog and digital control techniques provide stability as good as ±0.005 °C. And with dual-zone control, axial uniformity is as good as ±0.02 °C over a 60 mm (2.36 in) zone. This type of performance doesn’t exist anywhere else outside of fluid baths.
In short, there are six critical components of performance in an industrial heat source (which the European metrology community explains in EA-10/13): calibrated display accuracy, stability, vertical uniformity, radial (well-to-well) uniformity, impact from loading, and hysteresis. We added a seventh in the form of a legitimate reference thermometer input and created an entirely new product category: Metrology Grade Wells.
These Metrology Grade Wells are the only products on the market supported by published specifications addressing every performance category in the EA-10/13.
The Model 9171 provides 203 mm (8 in) of immersion over temperatures from –30 °C all the way to 155 °C with full-range stability of ±0.005 °C. Just like the 9170, this dry-well has exceptional axial and radial uniformity. The display of the 9171 is calibrated to an accuracy of ±0.1 °C over its full range.
Insert Options: 
| Range (at 23°C ambient) | –30°C to 155°C (–22°F to 311°F) | |
| Display accuracy | ±0.1°C full range | |
| Stability | ±0.005°C full range | |
| Axial uniformity | ±0.025°C at –30°C ±0.02°C at 0°C ±0.07°C at 155°C | |
| Radial uniformity | ±0.01°C full range | |
| Loading effect (with a 6.35 mm reference probe and three 6.35 mm probes) | ±0.005°C at –30°C ±0.005°C at 0°C ±0.01°C at 155°C | |
| Hysteresis | 0.025°C | |
| Well depth | 203 mm (8 in) | |
| Resolution | 0.001°C | |
| Display | LCD, °C or °F, user-selectable | |
| Key pad | Ten key with decimal and ± button. Function keys, menu key, and °C / °F key. | |
| Cooling time | 30 min: 23°C to –30°C 25 min: 155°C to 23°C | |
| Heating time | 44 min: 23°C to 155°C 56 min: –30°C to 155°C | |
| Size (H x W x D) | 366 x 203 x 323 mm (14.4 x 8 x 12.7 in) | |
| Weight | 15 kg (33 lb) | |
| Power | 115 V AC (±10%), or 230 V AC (±10%), 50/60 Hz, 550 W | |
| Computer interface | RS-232 Interface with 9930 Interface-it control software included | |
| Traceable calibration (NIST) | Data at –30°C, 0°C, 50°C, 100°C, and 155°C | |
| Specifications | Built-in Reference Input | |
| Temperature range | –200°C to 962°C (–328°F to 1764°F) | |
| Resistance range | 0 Ω to 400 Ω, auto-ranging | |
| Characterizations | ITS-90 subranges 4, 6, 7, 8, 9, 10, and 11 Callendar-Van Dusen (CVD): R0, a, b, d | |
| Resistance accuracy | 0 Ω to 20 Ω: 0.0005 W 20 Ω to 400 Ω: 25 ppm | |
| Temperature accuracy (does not include probe uncertainty) | 10 Ω PRTs: ±0.013°C at 0°C ±0.014°C at 155°C ±0.019°C at 425°C ±0.028°C at 700°C | 25 Ω and 100 Ω PRTs: ±0.005°C at –100°C ±0.007°C at 0°C ±0.011°C at 155°C ±0.013°C at 225°C ±0.019°C at 425°C ±0.027°C at 661°C |
| Resistance resolution | 0 Ω to 20 Ω: 0.0001 Ω 20 Ω to 400 Ω: 0.001 Ω | |
| Measurement period | 1 second | |
| Probe connection | 4-wire with shield, 5-pin DIN connector | |
| Calibration | NVLAP accredited (built-in reference input only), NIST-traceable calibration provided | |
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