The Fluke Hart Scientific 1502 Tweener PRT readout is a precision digital thermometer engineered to read Platinum Resistance Thermometers (PRTs), Resistance Temperature Detectors (RTDs), and thermistor probes. This instrument delivers temperature accuracy to ±0.006 °C and resolution of 0.001 °C across its full measurement range, making it suitable for industrial, laboratory, and field metrology applications requiring high precision.
Technical Specifications
• Temperature Range: −200 °C to 962 °C (−328 °F to 1764 °F); actual range limited by sensor used
• 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
• Temperature Resolution: 0.001 °C
• Resistance Range: 0 Ω to 400 Ω, auto-ranging
• Resistance Resolution: 0.0001 Ω (0–20 Ω), 0.001 Ω (20–400 Ω), 25 ppm (20–400 Ω)
• Probe Excitation Current: 0.5 mA and 1 mA, user-selectable, 2 Hz (reverses every 0.25 seconds)
• Measurement Period: 1 second
• Digital Filter: Exponential, 0 to 60 seconds time constant (user-selectable)
• AC Power: 115 VAC ±10%, 50/60 Hz, 10 VA (nominal); 230 VAC ±10%, 50/60 Hz, 10 VA (optional)
– Key Features
• Reads 100 Ω, 25 Ω, and 10 Ω probes without programming for standard IEC-751 or “385” ALPHA RTDs
• Supports ITS-90 formulas and subranges 4 and 6 through 11
• Programmable for custom probe constants and Callendar-Van Dusen coefficients (R0, α, δ, β)
• IPTS-68 characterization support (R0, α, δ, a4, c4)
• Large LED display with °C, °F, or K selection
• Resistance measurement in ohms
• RS-232 interface for data acquisition; optional IEEE-488 interface
• Digital front-panel calibration
• Portable operation with optional battery pack
• Compact design
– Typical Applications
Precision temperature calibration, industrial process monitoring, laboratory standards work, field verification of temperature sensors, and automated data acquisition systems.
– Compatibility & Integration
The 1502 Tweener accommodates platinum resistance probes with nominal RTPW (Relative Temperature of Platinum Resistance) from 10 Ω to 100 Ω. Standard connectivity via RS-232 supports integration into automated test and measurement systems. Optional IEEE-488 interface provides additional instrument control options.
