Fluke Calibration 1502A/1504 Thermometer Readout
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.
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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
−200°C to 962°C (−328°F to 1764°F)
UPC#: 0 95969 12019 7
Any thermistor range
UPC#: 0 95969 12023 4
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.
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.
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.
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).
Manuals + resources: Fluke Calibration 1502A/1504 Thermometer Readout
- Calculating Calibration Uncertainties in an Automated Temperature Calibration System
- Establishment of a Secondary Temperature Calibration Laboratory
- Industrial temperature readout and probe selection guide
- 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