The velocity CALIBRATION ZERO item is used to calibrate the 
EverWatch
 
velocity sensor at zero flow. 
 
A sensor zero should be established prior to adjusting the 
sensor span (see “Calibration” section following menu item 
section). 
 
Unit needs to 
be calibrated. 
No default 
value exists. 
The velocity CALIBRATION SPAN item is used to calibrate the 
EverWatch velocity sensor to the average face velocity as 
measured by a portable air velocity meter. 
 
A sensor zero should be established prior to adjusting the 
sensor span (see “Calibration” section following menu item 
section). 
 
Unit needs to 
be calibrated. 
No default 
value exists. 
The PASS item selects whether an access code is required to 
enter the calibration menu. If the access code is ON a code is 
required before the menu can be entered. Conversely if the 
access code is OFF no code is required to enter the menu. 
 
The End item identifies that the end of the calibration menu has 
been reached. 
 
This is not a 
menu item. 
This 
identifies that 
the end of the 
menu has 
been 
reached.