The CALIBRATE FLOW item is used to enter a CALIBRATE
FLOW sub-menu that is specific to the FLOW DEVICE that
is selected (see Flow Calibrate section following menu item
listing).
NOTE: The CALIBRATE FLOW menu item will not appear
if the FLOW DEVICE under the CONFIGURE
menu has been set to NONE.
The BALANCE MODE item is used to enter a BALANCE
MODE sub-menu. After a flow device has been calibrated,
the BALANCE MODE screen can be used to compare the
Measured Flow against the Actual Flow as determined by a
pitot tube traverse.
The SASH CAL CLOSED item is used to record sash
position of the fume hood. This is determined in one of two
ways:
1. If a Vertical Sash Position Sensor is being used, this
menu item will record the physical position of the
Potentiometer with the sash closed.
2. If there is no Vertical Sash Position sensor, the
controller will use both the face velocity and flow
information in the sash closed position to calibrate the
sash % open equation.
Upon entering this menu item, the display will read “Lower
Sash, then Press Enter.” Make sure the sash is lowered
completely, and then press the Enter key.
This menu item will timeout after a period of one hour if the
Enter key is not pressed. No information will be saved if
timeout occurs.
This menu item will not appear if the controller is not
configured to accept a sash sensor or flow measurement
with sidewall sensor.
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