Model P620

6-channel isolated resistance simulator

Overview

Features:
  • 6 channels of fully isolated precision resistance/RTD simulation
  • True 4-wire resistance simulation on all channels
  • Resistance programmable from 5Ω to 5MΩ in five ranges
  • Programmable for 100Ω and 1kΩ platinum RTDs
  • RTD mode accepts temperatures directly in Celsius
  • Monotonic resistance changes allow for RTD simulation without transient errors
  • Channels may be used in series or parallel for additional voltage and current capability
  • Separate TEST port allows access to channels for in-system calibration check
  • 4 versatile digital input/outputs
  • Built-in self-test (BIST)
  • Ethernet and USB interfaces
  • Access via serial ASCII commands or web interface
Description:

The P620 is a standalone 6-channel RTD and resistance simulator. It is intended for system-level testing of process control systems, FADEC engine controllers, and other critical systems.

Each independent, isolated channel can simulate common RTD types and six decades of resistance range. It uses entirely solid-state simulation to eliminate transient errors associated with relay switching, and provides for monotonic resistance changes. Channels can operate from millivolts up to 10V and 20mA. Overload protection and channel error detection are included.

Any channel may be rerouted, under software control, to the front-panel calibration-check connector, allowing the board to be tested for calibration by a precision DVM without disturbing the connections to the equipment under test. The built-in self test provides an onboard ohmmeter, allowing loopback checking and fully automatic self-test.

Both USB and Ethernet interfaces are provided. Control is via text commands or through the internal web page server. Only a web browser is needed to exercise all P620 functions, but the simple ASCII command set facilitates integration into user programs.

Four versatile digital I/O ports are provided, each CMOS/TTL compatible and capable of driving relays or LEDs.