Operating and Maintenance Instructions
210-OMI14229-Iss8.1
CN1116 Full OMI
Page 19 of 47
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Figure 16
–
Sensor airline connections for pressure and volume
When using inlet rings, due to potential disturbances it is recommended to use a multi-tapped inlet ring which
provides an averaged pressure value over all taps to improve the precision of the air volume measurement. If this
system operates with a single sensor, the precision of the air volume measurement can be improved further by
ensuring that all inlet ring tappings are equidistant from the sensor as shown below:
Figure 17
–
Airline length for a single sensor constant volume system or volume monitoring system
Instead of using a single differential pressure sensor, it is possible to connect multiple differential pressure sensors
to the system by using the 0-10V inputs of the fans. The operation with multiple differential pressure sensors can
improve reading accuracy and introduce another fail-safe layer to the system operation as the controller
automatically adjusts the settings in the event of a sensor failure. For more details, please see
7.0
Advanced Settings
The advanced settings submenu allows the configuration of different controller and fan parameters. We recommend
reading and understanding this whole section before making any changes.
A list of all available submenus inside the Advanced Settings submenu is shown below. Please note that not all
submenus are available at once and their availability depends on the selected operating mode and if the controller
has been configured to operate with or without differential pressure sensors:
