RESISTANCE BOX PRS-370 IET LABS

Resistance Box & RTD Simulator PRS-370 IET LABS

Advanced Programmable Resistance Standard and RTD Simulator

The PRS-370 by IET Labs is a state-of-the-art programmable resistance box and RTD simulator, engineered to meet the most demanding calibration and testing requirements. Designed for use in metrology labs and automated production environments, it delivers exceptional accuracy, performance, and ease of operation.

With a self-adjusting design, the PRS-370 achieves precision better than 10 ppm—far surpassing the accuracy of traditional manual resistance decades. This eliminates the need for individual resistance standards, making it an efficient and time-saving calibration solution. It serves as a programmable resistance substituter and RTD simulator, with built-in PT100, PT1000, and user-defined RTD tables.

Key Features

• Self-adjusting precision better than 10 ppm

• Integrated RTD simulator with built-in PT100 and PT1000 tables

• Compatible with 8.5-digit DMMs (Fluke 8508A, Keysight 3458A, etc.) via IEEE-488 interface

• Large color capacitive touchscreen with softkeys and numeric keypad

• Programmable through both local touchscreen and remote GPIB interface

• One-button auto-adjust to exact resistance values without manual trimming

• Gold-clad silver-alloy relay contacts for low thermal emf and reliable operation

• Supports custom RTD curves and user-defined resistance tables

• Front and rear binding posts for simultaneous DUT and DMM connection

• Built-in cybersecurity with firmware access controls and factory reset

Applications

• Precision resistance calibration

• RTD simulation and sensor testing

• Calibration labs requiring tight tolerance and repeatability

• Automated production testing and metrology systems

• Integration with precision DMMs for resistance validation

Specifications

• Resistance accuracy: better than 10 ppm

• Range: programmable across wide resistance values

• Display: capacitive color touchscreen with responsive interface

• Interfaces: USB, Ethernet, IEEE-488 (GPIB)

• RTD simulation: PT100, PT1000, and user-defined tables

• AC performance: stable below 1 kHz with low-inductance components

• Construction: low thermal emf relays, Z-foil and wirewound resistors

• Security: controlled firmware updates and full device reset option

• Warranty: 5 years

The PRS-370 offers unmatched performance, ease of use, and long-term reliability, making it the ultimate tool for high-precision resistance and RTD calibration tasks.