The Additel 286 represents the pinnacle of reference-grade temperature measurement from Additel. Far beyond a standard thermometer, it serves as a “Measurement Hub”—integrating a high-resolution thermometer, a comprehensive data logger, and a powerful process calibrator into a single, sophisticated instrument.

1. Reference-Grade Measurement Capabilities

• High Precision: Delivers industry-leading accuracy for use as a primary reference standard in laboratories or critical field applications where every millidegree counts.
• Multi-Channel Versatility: Capable of scanning up to 8 or 10 channels (depending on the module), allowing for the simultaneous calibration of multiple sensors.
• Universal Sensor Support: * SPRT / PRT / RTD: Built-in support for ITS-90, IEC-751 (DIN), and Callendar-Van Dusen conversions.
  • Thermocouples: Supports all types (S, R, B, K, J, T, E, N) with high-accuracy internal Cold Junction Compensation.
  • Thermistors: Optimized for high-sensitivity applications.

2. Advanced Feature Set

• Documenting Process Calibrator: Effortlessly manage calibration tasks, log data, and store As-Found / As-Left results directly on the device.
• HART Communication: Full capability to communicate with and calibrate smart transmitters utilizing the HART protocol.
• Large Color Interface: A 6.5-inch touchscreen provides real-time trending graphs and statistical analysis to simplify stability verification.
• Wireless Connectivity: Integrated Bluetooth and Wi-Fi for seamless data export and control via Additel ACal or Landerson software.

3. Technical Specifications at a Glance

• Resolution: Down to 0.0001Ω or 0.001°C.
• Accuracy: Up to ±0.002°C (sensor dependent).
• Channels: 1 Reference input + up to 10 DUT channels (expandable).
• Memory: Massive internal storage for long-term data logging.

4. The Additel Advantage

When paired with a calibration bath or dry well, the ADT286 acts as the “Brain” of the system, comparing the Master Probe against units under test with unmatched efficiency. It minimizes human error through automation, ensures compliance with ISO 17025 accredited calibration, and maintains flexibility with its portable, battery-powered design.