Fluke Calibration 1502A/1504 Thermometer Readout
Fluke Calibration 1502A Thermometer Readout is rated out of 5 by 1.
Key features
- 1502A: accuracy up to ±0.006 °C.
- 1504: accuracy up to ±0.002 °C plus ability to measure thermistor temperature sensors.
- 1502A: covers –200°C to 962°C
- 1504: covers 0 to 100°C
- Can take readings up to twice per second, making the calibration process faster.
Product overview: Fluke Calibration 1502A/1504 Thermometer Readout
Precision thermometer readouts for laboratory and field use
1502A Tweener PRT Readout
The Fluke Calibration 1502A Tweener offers precision temperature measurement with:
- Accuracy up to ±0.006 °C
- Resolution of 0.001 °C across the entire range
- Compatibility with 100-ohm, 25-ohm, and 10-ohm RTD probes
- Smallest unit in its class, ideal for field or bench use
- Optional 9320A Battery Pack for full portability
Advanced Features
- Programmable to match a probe’s constants for maximum linearity and accuracy
- Displays temperature in °C, °F, K, or resistance in ohms
- Reads standard industrial IEC-751 / “385 ALPHA” RTDs with no programming required
- Accepts ITS-90 subranges 4 and 6–11, with formulas built into firmware
- Calibration is done digitally via front-panel—no need to open the device
- Comes with RS-232 interface; optional IEEE-488 interface available
1504 Tweener Thermistor Readout
Need higher precision in a narrower temperature range? The Model 1504 Tweener offers:
- Accuracy up to ±0.002 °C
- Resolution of 0.0001 °C
- Designed specifically for thermistors—more robust, shock-resistant sensors with faster response times
- Ideal for applications requiring high sensitivity and reliability in limited temperature spans
Calibration and Probe Integration
- Each Tweener and its compatible probe (sold separately) include individual calibration reports
- System data is available upon request at two or more temperatures for high-precision needs (Calibration Model 1929-X)
- Users can calculate system accuracy using individual device specifications—no need to purchase system-level data unless required
Software Compatibility
Enhance your workflow with Fluke software tools:
- 9934 LogWare: Real-time data acquisition, graphing, and analysis
- MET/TEMP II: Use Tweeners as reference thermometers for automated calibrations
Optional Battery Pack
Take your Tweener on the road with the 9320A Battery Pack:
- Provides up to 36 hours of portable operation between charges
- Perfect for fieldwork or locations without direct power access
Specifications: Fluke Calibration 1502A/1504 Thermometer Readout
| Specifications | 1502A | 1504 |
| Temperature Range† | −200 °C to 962 °C (−328 °F to 1764 °F) | Any thermistor range |
| Resistance Range | 0 Ω to 400 Ω, auto-ranging | 0 Ω to 1 MΩ, auto-ranging |
| Probe | Nominal RTPW: 10 Ω to 100 Ω RTD, PRT, or SPRT | Thermistors |
| Characterizations | ITS-90 subranges 4, 6, 7, 8, 9, 10, and 11 IPTS-68: R0, a, d, a4, and c4 Callendar-Van Dusen: R0, a, d, and b | Steinhart-Hart thermistor polynomial Callendar-Van Dusen: R0, a, d, and b |
| Resistance Accuracy (ppm of reading) | 0 Ω to 20 Ω: 0.0005 Ω 20 Ω to 400 Ω: 25 ppm | 0 Ω to 5 KΩ: 0.5 Ω 5 KΩ to 200 KΩ: 100 ppm 200 KΩ to 1 MΩ: 300 ppm |
| Temperature Accuracy† | ±0.004 °C at −100 °C ±0.006 °C at 0 °C ±0.009 °C at 100 °C ±0.012 °C at 200 °C ±0.018 °C at 400 °C ±0.024 °C at 600 °C | ±0.002 °C at 0 °C ±0.002 °C at 25 °C ±0.004 °C at 50 °C ±0.010 °C at 75 °C ±0.020 °C at 100 °C (Using 10 KΩ thermistor sensor, a=0.04. Does not include probe uncertainty or characterization errors.) |
| Operating Temperature Range | 16 °C to 30 °C | 13 °C to 33 °C |
| Resistance Resolution | 0 Ω to 20 Ω: 0.0001 Ω 20 Ω to 400 Ω: 0.001 Ω | 0 Ω to 10 KΩ: 0.01 Ω 10 KΩ to 100 KΩ: 0.1 Ω 100 KΩ to 1 MΩ: 1 Ω |
| Temperature Resolution | 0.001 °C | 0.0001 °C |
| Excitation Current | 0.5 and 1 mA, user selectable, 2 Hz | 2 and 10 µA, automatically selected |
| Measurement Period | 1 second | |
| Digital Filter | Exponential, 0 to 60 seconds time constant (user selectable) | |
| Probe Connection | 4-wire with shield, 5-pin DIN connector | |
| Communications | RS-232 serial standard IEEE-488 (GPIB) optional | |
| Display | 8-digit, 7-segment, yellow-green LED; 0.5-inch-high characters | |
| Power | 115 VAC (±10 %), 50/60 Hz, 1 A, nominal 230 VAC (±10 %), 50/60 Hz, 1 A, nominal, specify | |
| Size (HxWxD) | 61 x 143 x 181mm (2.4 x 5.6 x 7.1 in) | |
| Weight | 1.0 kg (2.2 lb.) | |
| Probes from Fluke Calibration | 5615, 5627, 5626, 5628, 5622 | 5640-44, 5610-65 |
| Calibration | ISO 17025-accredited calibration provided | |
| †Temperature ranges and accuracy may be limited by the sensor you use. | ||
Models: Fluke Calibration 1502A/1504 Thermometer Readout
Fluke 1502A
Fluke Calibration 1502A-156 Thermometer Readout
−200°C to 962°C (−328°F to 1764°F)
−200°C to 962°C (−328°F to 1764°F)
1502A-2506
Tweener PRT Readout, with IEEE-488
Fluke 1504
Fluke Calibration 1504 Thermometer Readouts
Any thermistor range
Any thermistor range
1504-2506
Tweener Thermistor Readout, with IEEE-488
9934-S
LogWare, Single Channel, Single User
9934-M
LogWare, Single Channel, Multi User
1929-2
System Verification, PRT with Readout, Accredited.
Choose two temperature points, extra points at additional cost. Available temperature points are –197 °C, -80 °C , –39 °C, 0.01°C, 30 °C, 157 °C, 232 °C, 300 °C, 420 °C, 500 °C, 660 °C.
1929-5
System Verification, Thermistor with Readout, Accredited.
Choose two temperature points; extra points at additional cost. Available temperature points are -30 °C, -20 °C, -10 °C, 0 °C, 10 °C, 20 °C, 30 °C, 40 °C, 50 °C, 60 °C, 70 °C, 80 °C, 90 °C, 100 °C.
1930
System Calibration, PRT with Readout, Accredited
Choose PRT temperature range for the calibration. Available temperature ranges are –200 °C to 500 °C, –200 °C to 420 °C, –80 °C to 420 °C, –40 °C to 420 °C, –40 °C to 232 °C, 0 °C to 420 °C.
1935
System Calibration, Thermistor with Readout, NVLAP-accredited
Choose thermistor temperature range for the calibration. Available temperature ranges are 100 °C span (6 points over span), 60 °C span (7 points over span), 100 °C span (11 points over span).
Rated 4 out of 5 by Lab Manager from Lots of years of service so far Purchased over twenty-two years ago. Never a problem with the readout, but did have to buy one new probe so far.
Just a minor detraction from 5-stars: Since this instrument is so old, the original software that came with it no longer works in current Windows environment and lots of button pushing is required to set up simple data logging.
Date published: 2022-10-11
Manuals + resources: Fluke Calibration 1502A/1504 Thermometer Readout
- Calculating Calibration Uncertainties in an Automated Temperature Calibration System
- Establishment of a Secondary Temperature Calibration Laboratory
- Probe-to-Readout Adapter Guide
- PRT Temperature vs. Resistance Table
- Temperature Calibration Equipment: A Technician's Guide
- Temperature measurement and calibration: What every instrument technician should know