Modular Heat Trace Control System
Standard features of the system include the availability of three control modes: ON/OFF, PID, and SMART tuning. The system's temperature alarm can be programmed for process deviation, band, high/low, and latching/non-latching (manual or automatic reset). The low current alarm can be set from 0 to 30 A in 1 A increments, and the optional GFI alarm trip can be adjusted over a range from 5 mA to 100 mA. In addition, the dual digital display can be programmed for either °C or °F.
All systems are designed for universal inputs, which include types J, K, L, N, R and S thermocouples, RTDs, current, and voltage. Each unit comes in a NEMA 4X glass fiber reinforced enclosure (H12.5- × W10.5- × D6-in.) that includes a solid-state relay with 30 A rating at 40°C, mounted on a heatsink, and a current transformer to measure operating current. The optional GFI modules have a shutdown contactor and illuminated reset switch. A terminal block is used for field connections on all units.
Chromalox Precision Heat and Control, 701 Alpha Drive, Pittsburgh, PA 15238. Tel: 443-2640 or 412-967-3803. Fax: 412-967-5148.