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MicroTransII Airflow Signal Processor & Controller

The MicroTransII controller utilizes a proprietary algorithm which results in true three mode control incorporating proportional band, integral (reset) and inverse derivative (P, I, 1/D) controller functionality and tuning. The ultra low 0.03"w.c. differential pressure (693 fpm at standard air density conditions) full scale operating range and the auto zeroing function provides accurate air flow measurement down to 100 fpm making this product ideal for control of outdoor air dampers.  An optional economizer override feature is included to allow the BMS system to override the constant volume controller output. The MicroTransII controller can also be used to maintain a constant duct volume by controlling a variable speed drive or damper. For easy use on fan inlet applications with piezometer ring systems, the MicroTransII incorporates a special piezometer ring flow algorithm with easy flow coefficient entry through display menus.  A 4-point flow correction and K-factor field menu are included to reduce time and save money spent on balancing.  Device monitoring and configuration can also be performed by a building management system through either a LonWorks®, BACnet-MS/TP® Master, or Modbus® RTU Slave communication network.

SPM-4000 Guardian Infinity Room/Space Pressurization Monitor and Controller
The SPM-4000 Guardian Infinity is a complete room/space pressure measurement system including space and reference pressure sensors and a central signal processing module. The central module includes a flush mount electrical box, 8 line graphic display for local indication of the space pressure and device configuration, six button touch pad for field configuration, LED indication of operational mode and status, and an audible alarm with alarm acknowledge switch. The Guardian Infinity offers an optional controller to provide responsive modulation of a control damper or variable speed drive guaranteeing a stable space pressure is maintained. Device monitoring and configuration is performed via LonWorks® or BACnet®-MS/TP communication networks. Additionally, the monitor can be configured locally via IR communication using a laptop or Palm Tungsten E2® (or equivalent). An additional network communication port is available for connection to PCI’s RPM-2000 Guardian Remote Pressure Monitor that can be located at a nurse’s station.