The Fluke 1524 Reference Thermometer is a dual-channel, handheld instrument for high-accuracy temperature measurement across laboratory and field environments. It accepts Platinum Resistance Thermometers (PRTs), Resistance Temperature Detectors (RTDs), thermocouples, and thermistors, delivering measurement ranges from -200 °C to 2315 °C depending on sensor type. The instrument employs current reversal technique to eliminate thermal EMFs, achieving accuracy to ±0.002 °C for thermistors and ±0.011 °C for PRTs while remaining insensitive to ambient temperature fluctuations.
Technical Specifications
Measurement Capabilities
• Input channels: 2
• PRT/RTD range: -200 °C to 1000 °C [-328 °F to 1832 °F]; accuracy ±0.011 °C; resolution 0.001°
• Thermocouple range: -200 °C to 2315 °C [-328 °F to 4199 °F]; accuracy ±0.24 °C (J, K, L, M types); resolution 0.01°
• Thermistor range: -50 °C to 150 °C [-58 °F to 302 °F]; accuracy ±0.002 °C; resolution 0.001°
• Millivolt range: -10 mV to 75 mV; accuracy ±(0.005% + 5 µV)
• Resistance ranges: 0–400 Ω, 200–50 kΩ, 50–500 kΩ
• Excitation current: 1 mA (0–400 Ω), 10 µA (0–50 kΩ), 2 µA (50–500 kΩ)
Sampling and Logging
• Sample rate: 1 reading/second standard; 1 reading/0.3 seconds fast mode
• Data logging: 15,000 measurements; configurable intervals from 1 reading/hour to 1 reading/0.3 seconds
• Real-time clock with date/time stamping; Document on Demand function stores up to 25 readings with statistics
Display and Interface
• 128×64 backlit LCD graphic display with real-time dual-channel trend plotting
• RS-232 serial interface; 9940 I/O ToolKit software included; optional LogWare II software available
Power and Environmental
• Internal: 3 AA batteries (>20 hours operation)
• External: 12 VDC Universal Power Supply (included)
• Operating range: -10 °C to 60 °C; best accuracy 13 °C to 33 °C
– Key Features
• Current reversal eliminates thermal EMFs for precision measurements
• Dual simultaneous temperature channels reduce measurement time
• Configurable logging intervals support both continuous monitoring and spot sampling
• Rugged design validated under temperature extremes and vibration stress
– Typical Applications
Calibration laboratories, process control verification, thermal validation testing, equipment commissioning.
– Compatibility & Integration
RS-232 serial connection enables integration with laboratory data acquisition systems and calibration software suites.
