Download Model 8682/8682-BAC SureFlow Adaptive Offset Controller

Calibration
The calibration section explains how to calibrate and set the elevation for the AOC
pressure sensor and how to calibrate a flow station.
NOTE: The pressure sensor is factory calibrated and normally does not need to be
adjusted. However, inaccurate readings may be detected if pressure sensor is
not installed correctly, or problems with the sensor exist. Before calibrating,
check that the sensor is installed correctly (usually only a problem on initial set
up). In addition, go into DIAGNOSTICS menu, SENSOR STAT item. If NORMAL
is displayed, calibration can be adjusted. If an error code is displayed, eliminate
error code and then verify pressure sensor needs adjustment.
Adjusting the SureFlow pressure sensor calibration may be required to eliminate errors
due to convection currents, HVAC configuration, or equipment used to make the
measurement. TSI recommends always taking the comparison measurement in the exact
same location (i.e., under the door, middle of door, edge of door, etc.). A thermal air
velocity meter is needed to make the comparison measurement. Normally the velocity is
checked at the crack under the doorway, or the door is opened 1” to allow alignment of
the air velocity probe making the measurement. If the crack under the door is not large
enough, use the 1” open door technique.
All pressure transducer based flow stations and 1 to 5 VDC linear flow stations must be
zeroed upon initial system set up. Linear 0 to 10 VDC flow stations do not require a zero
flow to be established.
Calibrating Pressure Sensor
Enter calibration menu (see Software Programming if not familiar with keystroke
procedure). Access code is turned on so enter access code. All menu items described
below are found in CALIBRATION menu.
Elevation
The ELEVATION item eliminates pressure sensor error due to elevation of
building. (See ELEVATION item in Menu and Menu items section for further
information).
Enter the ELEVATION menu item. Scroll through the elevation list and select the
one closest to the building’s elevation.
Press the SELECT key to save the data and exit back to the calibration menu.
Figure 8: Pressure Sensor Door Slid Open
Technical Section
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