Author: Mark Yeager – Integrated Test & Measurement (itm), LLC
Industry: Pulp and Paper
NI Products Used: NI cRIO-9074, NI-9174
Paper Mill Thermocouple Monitoring System using NI CompactRIO
Our customer wanted to measure the temperature of steam tubes located inside its utility boiler to make sure start-up conditions were met. The customer also needed to quantify and analyze temperature changes inside the boiler during normal operation so it could use that information to trigger the operation of other equipment and interlocks.
To identify and quantify temperature conditions inside its boiler, the customer needed a system that could a) log temperature measurements, b) transfer these data files to a remote computer, c) perform complex measurements at high speeds and d) output results to a web page.
To accomplish this, ITM developed and installed a measurement and control system consisting of two cRIO-9074 Controllers and two National Instruments (NI) 9144 EtherCAT chassis containing 19 NI 9213 thermocouple modules. This system could monitor signals from 280 thermocouples. We deployed a LabVIEWTM RT application that would determine if certain temperature conditions were met inside the boiler. When these events occurred, the system then used the NI 9485 relay module to control other equipment and interlocks.
- NI Hardware: cDAQ-9074 (x2), NI 9144 (x2), NI 9213 (x19) and NI 9485 (x2)
- Third-Party Hardware: Type K Thermocouples
- NI Software: LabVIEWTM and LabVIEWTM RT
The remote monitoring system itm developed operates as a watchdog to ensure that the boiler is operating under normal conditions. It also works to reduce downtime and to reduce the risk of damaging the boiler systems during normal operation and start-up periods. The temperature measurement system was so effective that our customer plans to deploy this system on more of its utility boilers throughout the enterprise.
Author Information: For more information on this Case Study, contact: Mark Yeager – Integrated Test & Measurement (itm), LLC – firstname.lastname@example.org