By Pat Dillon, Virginia Commonwealth University, Instrumentation & Electrical
For the past few years, the Virginia Commonwealth University campus in Richmond found that it couldn't account for about 16 percent of generated steam. The steam plant for the downtown campus consists of three identical boilers, each capable of generating 125,000 lbs/hr at 120 to 200 psi. The operators adjust the steam pressure to a value best-suited to meet the load demand. Over the course of a year the plant puts out more than 400 million lbs of steam.
The TTH300 (head-mounted) and TTF300 (field-mounted) transmitters offer user-friendly sensor calibration and innovative backup redundancy for two Platinum 100 resistance thermometers with 3-wire connections. Inputs include resistance thermometers and thermocouples, resistance type transmitters, and millivolt voltage transmitters.