APPENDIX A: USING AN LNS TOOL TO COMMISSION A FAN COIL UNIT
Temperature Sensor Calibration
The temperature sensor in the Excel 10 wall modules can be
calibrated to correct for sensor inaccuracies, wire resistance,
etc. This allows the Excel 10 FCU Controller to sense the
space temperature with a high degree of accuracy.
Select the controller being worked on with the LNS tool.
From within the LNS tool, with the desired project loaded and
the SLTA (Q7752A) connected to the LonWorks network,
perform the following procedure:
1. Select a controller symbol from a network diagram.
2. Click on Calibrate from the Controller menu. Once the
LNS tool logs on to the controller, the Room
Temperature Calibration dialog box appears.
3. The box displays the Current Value of the sensor and
the current Offset; it also contains a field for entering
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
the actual Measured Value. When a value is typed in
and Calibrate is clicked, the offset value is
automatically calculated, displayed, and written to the
Excel 10 FCU Controller.
Fig. 19. Calibration dialog box
4. Click on Close after completing adjustments.