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8 Configurable Channels of Either RTD Measurement or Thermocouple

The TR1 provides 8 channels which can be individually programmed as a Thermocouple (TC) or a Resistance Temperature Detector (RTD) measurement interface. When configured as a TC, the channel can interface with virtually all thermocouple-type NIST temperature ranges. When configured as an RTD, the channel can interface to two, three and four-wire platinum RTD sensor configurations.

The TR1 channels are individually configurable for up to 8 isolated TC or low-voltage range A/D measurement channels. Configuration programmability provides interfaces for industry standard NIST thermocouple types (J, K, T, E, N, B, R, and S).

The TR1 channels are individually configurable for up to 8 isolated RTD measurement channels. Each channel is configurable for use with 4-wire, 3-wire or 2-wire connections to the RTD sensors. All RTD channels provide measurement results in Single Precision Floating Point Value (IEEE-754) format.

  • Thermocouple Measurement: Interfaces with most standard NIST thermocouple types (J, K, T, E, N, B, R, and S), Self-powered, Large temperature range; up to 2300° C, Accuracy up to ±0.2° C (thermocouple type dependent), Thermo-block compensation option P/N ACC-ISO-THERM-BLK2 (If accessory used, channel 8 is automatically allocated as an RTD interface for the thermo-block compensation temperature measurement)
  • RTD Measurement: Higher accuracy and repeatability as compared with thermocouples in applications below 600 °C, Two, three or four-wire mode, Single Precision Floating Point Value (IEEE-754) format, Open sensor connections are detected and reported, 1 mA, 500 µA & 250 µA excitation sources for Pt100, Pt500 & Pt1000 ranges
  • Independently Programmable: Up to 8 RTD channels, Up to 8 Thermocouple channels
  • Independent Mode Select: Configures Thermocouple or RTD
  • Programmable Sample Rate: Sets the sampling rate of the A
  • Offset Temperature: Provides ability to null for any system induced measurement errors

  • Thermocouple:
  • A/D Converter: Independent 24-bit Sigma-Delta type (one for each channel)
  • Temperature Range: NIST temperature range (J, K, T, E, N, B, R, S thermocouple types)
  • Voltage Measurement Range: ±78.125 mV to an accuracy of ± 25 µV over operational temperature.
  • Overvoltage Input Tolerance: ± 4 V continuous, ±50 V momentary duration limited to 100 ms (applied at signal input)
  • 50/60 Hz Noise Rejection: >70 dB
  • CMR: 85 dB (minimum)
  • Differential Input Impedance: >10 KΩ
  • Digital Output: IEEE 754-2008 (binary32) programmable for ° C, ° F (programmed for temperature), 24-bit (signed), based on % FSR (±78 mV) (programmed for A/D)
  • Accuracy: Based on minimum update rate and w/thermocouple block I/F compensation; ±0.2° C (Type J/N), ±0.3° C (Type K), ±0.3° C (Type T/E), ±0.3° C (Type R/S), ±0.9° C (Type B), ± 0.2% FSR (programmed for raw A/D digital output)
  • Resolution: 0.01° typ. (programmed for temperature, thermocouple selection dependent)
  • Sample Rate: Programmable between 3-4800 Hz
  • Thermo-Block Interface: Optional thermocouple interface for connection of up to 7 thermocouple sensors. Pt100 RTD sensor for cold junction compensation temperature.
  • Build-In-Test (BIT): Continuous background ‘online’ accuracy, OPEN detection capability.
  • RTD:
  • Analog Input Resolution: 24 bits per channel
  • RTD Interface: 4, 3, or 2-wire RTD interface capability. Specifically designed for use with common 100 Ω, 500 Ω, 1000 Ω and 2000 Ω RTDs with general resistance measurement capability up to 8000 Ω. Direct readout of temperature in ° C / ° F with standard Pt sensors.
  • Open Line Detection: Ability to detect an open in any line or RTD in all wire modes.
  • Excitation: 1mA (Pt100), 500µA (Pt500), 250µA (Pt1000) or 100µA (Pt2000) for 2- & 4-wire mode; 500µA (Pt100), 250µA (Pt500), 125µA (Pt1000) or 50µA (Pt2000) for 3-wire mode
  • Accuracy: ±0.1% of full-scale value @ 5 samples per second (4-wire mode only), ±0.2% of full-scale value @ 5 samples per second (3-wire mode only), ±1.2% of full-scale value @ 5 samples per second (2-wire mode only)
  • Sample Rate: Programmable between 3-4800 Hz
  • Output Format: Resistance/Temperature
  • Built-In-Test (BIT): Continuous background ‘online’ accuracy, OPEN detection capability.
  • General:
  • Power: +5 VDC @ 480 mA typ.
  • Ground: Independent channels; isolated from system ground.
  • Weight: 1.5 oz. (42 g)
  • ESD Protection: Designed to meet the testing requirements of IEC 801-2 Level 2. (4 kV transient with a peak current of 7.5 A and a Tc of approximately 60 ns)
  • Number of Channels: Eight channels programmable for RTD or Thermocouple mode.
  • Input Interface: Independent differential input channels.
Block Diagram
12/6/2023 10:55:25 AM
12/6/2023 10:55:04 AM
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