Technical Section 7
Part Two
Technical Section
The PresSura™ Room Pressure Controller is
ready to use after being properly installed and
configured. The TSI through-the-wall sensor is
factory calibrated, as are most pressure
transducers. Figure 4 shows the Digital Interface
Module (DIM) which is programmed with a
default configuration that can be easily modified
to fit your application.
The technical section is separated into five parts
that cover all aspects of the unit. Each section is
written as independently as possible to minimize
flipping back and forth through the manual for
an answer.
Figure 4. PresSura Room Pressure Controller
The Software Programming section explains the programming keys on the DIM. In addition, the
programming sequence is described, which is the same regardless of the menu item being
changed. At the end of this section is an example of how to program the DIM.
The Menu and Menu Items section lists all of the software items available to program and
change. The items are grouped by menu which means all set points are in one menu, control
signal items in another, etc. The menu items and all related information is provided including;
programming name, description of menu item, range of programmable values, and how the unit
shipped from the factory (default value).
The Calibration section describes the required procedure to calibrate the controller. This section
explains how to compare the controller’s reading to a portable thermal anemometer and then
adjust the span to establish an accurate calibration. This section also describes how to zero a TSI
flow station transducer (if installed).
The Maintenance and Repair Parts section covers all routine maintenance of equipment, along
with a list of repair parts.
The Troubleshooting section is split into two areas: mechanical operation of the unit and system
performance. Many external variables will affect how the unit functions so it is critical to first
determine if the system is having mechanical problems—i.e., no display on unit, alarms do not
function, , etc. If no mechanical problems exist, look for performance problems (i.e., does not
seem to read correctly, display fluctuates, etc.). The first step is to determine that the system is
mechanically operating correctly, followed by modifying the configuration to eliminate the
performance problems.
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