3 … 5
MC • Karl Dungs
, Inc.
• AA...A1 • Edition 2016.03 • P/N 261392
Operation
Setpoint tolerance
Upper switching
pressure
Falling
Rising
Adjustment as pr
essur
e rises
Pressure
at meter
Switching h
yster
esis Δp
Lower switching
pressure
AA...A1 Mounting Procedure
• Use suitable hoses for the medium.
• Use a maximum 5/32” ID hose
• Secure the hoses with a cable tie or
a cable clip.
Pressure Connection
Definition of switching
hysteresis ∆p
The pressure difference between the
upper and lower switching pressures.
Connection p2 (–) = lower pressure
Connection p1 (+) = higher pressure
Application & Connection Examples
System vacuum monitor
AA...A1 is connected to the air duct with
the p2 (-) connection. p1 (+) is not con-
nected with the air duct.
Do not seal the p1 (+) connection; it must
be open to the atmosphere.
Filter monitoring
To monitor a filter, the AA...A1 can be
connected as shown above.
Blower monitoring
For blower monitoring, connect con-
nection p1 (+) to the air duct on the
downstream side of the blower and con-
nection p2 (-) to the air duct upstream
of the blower.
Connection p1
must remain open
Connection p2 Connection p1
Connection p2 Connection p2
Connection p1
Prevent dirt from entering
into the device through con-
nection p1(+)
