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
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.
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. |
Accessories: Fluke Calibration 1502A/1504 Thermometer Readout
Cases and holsters (1)
- 9301 | Carrying Case, fits Tweener and 12 in probe
Adapters and cables (2)
- 2505 | Spare Connector
- 2508 | Serial Cable Kit
Accessories: Fluke Calibration 1502A/1504 Thermometer Readout
Cases and holsters (1)
- 9301 | Carrying Case, fits Tweener and 12 in probe
Adapters and cables (2)
- 2505 | Spare Connector
- 2508 | Serial Cable Kit
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