Fluke Calibration 9173 Metrology Well

  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getAggregateRating, 122.75ms
  • REVIEWS, PRODUCT
  • bvseo-msg: HTTP status code of 404 was returned;
  • Fluke Calibration 9173 Metrology Well

Key features

  • Exceptional stability (±0.005 °C) and axial uniformity (±0.02 °C over a 60 mm zone).
  • Immersion depth to 203 mm (8 in)
  • Optional ITS-90 reference input reads PRTs to ±0.006 °C
  • Wide Temperature range from –45 °C to 700 °C

Product overview: Fluke Calibration 9173 Metrology Well

Display Accuracy

Most dry-wells are calibrated by inserting a calibrated PRT and adjusting internal control sensors. However, this approach has limited value due to:

  • Differences between the reference PRT and thermometers being tested
  • Thermal gradients in the block
  • Inadequate immersion from short blocks

Metrology Wells overcome these issues through:

  • Minimized temperature gradients, loading effects, and hysteresis
  • Calibration using traceable, accredited PRTs
  • Proprietary electronics with repeatable accuracy, exceeding specs by more than 10x
  • Display accuracy from ±0.1 °C (typical temps) to ±0.25 °C at 661 °C

An application note is available to better understand the associated uncertainties.

Optional: For improved accuracy, Metrology Wells can be ordered with built-in electronics for external PRT reading using ITS-90 characterizations.

Stability

Fluke heat sources are among the most stable in the world—and Metrology Wells improve upon this legacy:

  • Models 9170 / 9171: Stability of ±0.005 °C over the full range
  • Model 9173 (700 °C unit): Stability of ±0.03 °C

Only fluid baths or primary fixed-point devices offer better performance. This level of stability cannot be matched by the “off-the-shelf” controllers found in most dry-wells.

Axial Uniformity

According to EA-10/13 guidelines, dry-wells should have a 40 mm zone of maximum homogeneity. Metrology Wells go further with:

  • Dual-zone control
  • Increased well depth
  • Homogeneous zones extending 60 mm (2.36 in)
  • Vertical gradients ranging from ±0.02 °C at 0 °C to ±0.4 °C at 700 °C

Specifications for axial uniformity are published and guaranteed for each unit.

Radial Uniformity

Defined as the temperature difference between wells:

  • Metrology Wells use a strict definition—largest difference between homogeneous zones of wells ≤6.4 mm (0.25 in) in diameter
  • Models 9170 / 9171 (cold units): ±0.01 °C
  • Models 9172 / 9173 (hot units): ±0.01 °C to ±0.04 °C at 700 °C

Poorly designed sources or use of large probes can lead to large variations; Metrology Wells prevent this.

Loading Effects

Loading is the temperature shift when all wells are filled versus when only one is. Metrology Wells minimize this through:

  • Deep well design
  • Dual-zone controls
  • Cold units show minimal effects, as low as ±0.005 °C

Hysteresis

Thermal hysteresis arises mostly from internal control sensors rather than high-quality reference PRTs. It reflects the difference in measurements at the same set point approached from different directions.

  • More pronounced near midpoints of temperature ranges
  • Metrology Wells use better internal components
  • Hysteresis effects range from 0.025 °C to 0.07 °C

Immersion Depth

Deep immersion is key to minimizing axial gradient and loading effects. Metrology Wells accommodate sensor-specific factors such as:

  • Sensor location and size
  • Probe mass and width
  • Lead wire configuration

Well depths:

  • Models 9171 / 9172 / 9173: 203 mm (8 in)
  • Model 9170: 160 mm (6.3 in), enabling performance to –45 °C

User Interface and Software Features

Metrology Wells are simple and intuitive to use, featuring:

  • Large LCD display
  • Numeric keypad
  • On-screen menus in English, French, or Chinese
  • Real-time display of block temp, reference temp, cutout temp, stability, and ramp rate

Interfaces and Automation:

  • RS-232 serial interface
  • Compatible with Model 9930 Interface-it and xModel 9938 MET/TEMP II software
  • Supports fully automated calibration of RTDs, thermocouples, and thermistors

Pre-programmed functions (no PC required):

  • Up to 8 set points with ramp/soak
  • Automated “switch test” to identify thermal switch dead-band
  • Dedicated °C/°F switch button

Inserts and Portability

  • Choose from six standard inserts supporting both metric and imperial probe diameters
  • Units are compact and lightweight—easy to deploy in various environments

Model 9170 Summary

  • Temperature range down to –45 °C (in normal conditions)
  • Stability: ±0.005 °C
  • Immersion depth: 160 mm (6.3 in)
  • Axial uniformity: ±0.02 °C
  • Radial uniformity: ±0.01 °C

Specifications: Fluke Calibration 9173 Metrology Well

Specifications
Range (at 23°C ambient)50°C to 700°C1 (122°F to 1292°F)
Display accuracy±0.2°C: 50°C to 425°C
±0.25°C: 425°C to 660°C
Stability±0.005°C: 50°C to 100°C
±0.01°C: 100°C to 425°C
±0.03°C: 425°C to 700°C
Axial uniformity±0.1°C: 50°C to 100°C
±0.25°C: 100°C to 425°C
±0.4°C: 425°C to 700°C
Radial uniformity±0.01°C: 50°C to 100°C
±0.025°C: 100°C to 425°C
±0.04°C: 425°C to 700°C
Loading effect (with a 6.35 mm reference probe and three 6.35 mm probes)±0.02°C at 425°C
±0.04°C at 700°C
Hysteresis0.07°C
Well depth203 mm (8 in)
Resolution0.001°C
DisplayLCD, °C or °F, user-selectable
Key padTen key with decimal and ± button. Function keys, menu key, and °C / °F key.
Cooling time235 min: 700°C to 50°C
153 min: 700°C to 100°C
Heating time46 min: 50°C to 700°C
Size (H x W x D)366 x 203 x 323 mm (14.4 x 8 x 12.7 in)
Weight15 kg (33 lb)
Power115 V AC (±10%), or
230 V AC (±10%), 50/60 Hz, 1025 W
Computer interfaceRS-232 Interface
Traceable calibration (NIST)Data at 100°C, 200°C, 350°C, 500°C, and 660°C
1. Calibrated to 660°C; reference thermometer recommended at higher temperatures.
SpecificationsBuilt-in Reference Input
Temperature range–200°C to 962°C (–328°F to 1764°F)
Resistance range0 Ω to 400 Ω, auto-ranging
CharacterizationsITS-90 subranges 4, 6, 7, 8, 9, 10, and 11 Callendar-Van Dusen (CVD): R0, a, b, d
Resistance accuracy0 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 resolution0 Ω to 20 Ω: 0.0001 Ω
20 Ω to 400 Ω: 0.001 Ω
Measurement period1 second
Probe connection4-wire with shield, 5-pin DIN connector
CalibrationNVLAP accredited (built-in reference input only), NIST-traceable calibration provided

Models: Fluke Calibration 9173 Metrology Well

Fluke 9173-A
Fluke Calibration 9173-A Metrology Well
Insert “A”, Al-Brnz, Misc Holes
50°C to 700°C

Buy it

Includes:

  • INSX
Fluke 9173-B
Fluke Calibration 9173-B Metrology Well
Insert “B”, Al-Brnz, Comparison Holes
50°C to 700°C

Buy it

Includes:

  • INSX
Fluke 9173-C
Fluke Calibration 9173-C Metrology Well
Insert “C”, Al-Brnz, 0.25-inch Holes
50°C to 700°C

Buy it

Includes:

  • INSX
Fluke 9173-D
Fluke Calibration 9173-D Metrology Well
Insert “D”, Al-Brnz, Comparison Metric Holes
50°C to 700°C

Buy it

Includes:

  • INSX
Fluke 9173-E
Fluke Calibration 9173-E Metrology Well
Insert “E”, Al-Brnz, Misc Metric Holes, w/ 0.25-inch Ref Hole
50°C to 700°C

Buy it

Includes:

  • INSX
Fluke 9173-F
Fluke Calibration 9173-F Metrology Well
Insert “F”, Al-Brnz, Metric Comparison Holes, w/ 0.25-inch Ref Hole
50°C to 700°C

Buy it

Includes:

  • INSX
Fluke 9173-A-R
Fluke Calibration 9173-A-R Metrology Well
Insert “A”, Al-Brnz, Misc Holes
50°C to 700°C

Buy it

Includes:

  • INSX
  • Built-In Reference
Fluke 9173-B-R
Fluke Calibration 9173-B-R Metrology Well
Insert “B”, Al-Brnz, Comparison Holes
50°C to 700°C

Buy it

Includes:

  • INSX
  • Built-In Reference
Fluke 9173-C-R
Fluke Calibration 9173-C-R Metrology Well
Insert “C”, Al-Brnz, 0.25-inch Holes
50°C to 700°C

Buy it

Includes:

  • INSX
  • Built-In Reference
Fluke 9173-D-R
Fluke Calibration 9173-D-R Metrology Well
Insert “D”, Al-Brnz, Comparison Metric Holes
50°C to 700°C

Buy it

Includes:

  • INSX
  • Built-In Reference
Fluke 9173-E-R
Fluke Calibration 9173-E-R Metrology Well
Insert “E”, Al-Brnz, Misc Metric Holes, w/ 0.25-inch Ref Hole
50°C to 700°C

Buy it

Includes:

  • INSX
  • Built-In Reference
Fluke 9173-F-R
Fluke Calibration 9173-F-R Metrology Well
Insert “F”, Al-Brnz, Metric Comparison Holes, w/ 0.25-inch Ref Hole
50°C to 700°C

Buy it

Includes:

  • INSX
  • Built-In Reference
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getContent, 22.77ms
  • QUESTIONS, PRODUCT
  • bvseo-msg: HTTP status code of 404 was returned;
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getReviews, 21.82ms
  • REVIEWS, PRODUCT
  • bvseo-msg: HTTP status code of 404 was returned;
Please enable cookies to view product reviews.

Manuals + resources: Fluke Calibration 9173 Metrology Well

Chat with ourFluke assistant
Clear Chat