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B, E, J, K, N, R, S, and T thermocouple types supported; the instrument automatically
linearizes the measurements and returns the data as a 32-bit, floating-point
temperature values
Input range of ±0.075 V for the DT9871U (with 0.25 V RMS A/D noise using no
software filtering) and ±1.25 V for the DT9871 (with 5 V RMS A/D noise using no
software filtering)
Break-detection circuitry to detect open thermocouple inputs
• DT9872:
Configurable analog input channels for RTDs and differential voltage inputs;
easy-access jacks for each channel for quick wiring
100 , 500 , and 1000 platinum RTD types supported using alpha curves of 0.00385
(European) or 0.00392 (American)
4-wire, 3-wire, or 2-wire configurations; the DT9872 automatically linearizes the
measurements and returns the data as 32-bit, floating-point temperature, resistance, or
voltage values
Input range of ±1.25 V
• One 24-bit, Delta-Sigma A/D converter per channel for simultaneous, high-resolution
measurements
• Throughput rate of up to 10 Samples/s for all channels.
• Software or external, digital trigger on digital input line 0 starts acquisition
• Auto-calibrating front-end resets the zero point on each power-up; in addition, the
instrument supports anytime calibration, performing an auto-calibration function on
software command
• Measurement Calibration Utility allows you to calibrate the instrument in the field (see
page 20
for more information on this utility)
• 8 opto-isolated digital input lines; you can read the digital input port through the analog
input data stream for correlating analog and digital measurements
• 8 opto-isolated digital output lines; the outputs are solid-state relays that operate from
±30 V at currents up to 400 mA (peak) AC or DC
Overview
15
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