WIKA PSA-31 - Manual (Page 18)

18 WIKA operating instructions pressure switch model PSA-31
GB
14018458.01 11/2011 GB/D/F/E
6. Commissioning, operation
6.4 Operating modes
■ System start
Display is fully activated for 2 seconds.
When the pressure switch is powered up within the range of the hysteresis, the output switch is set to
"not active" by default.
■ Display mode
Normal operation, display pressure value
■ Programming mode
Setting the parameters
6.5 Keys and functions
The pressure switch has two operating modes, the display mode and the programming mode. The
selected operating mode determines the respective function of the key.
Jumping into the programming mode
Keep the "MENU" key pressed for approx. 5 seconds. If the password is set
to ≠ 0000, a password will be requested. If authentication is successful, then it
enters the programming mode, otherwise it reverts to display mode.
Returning to the display mode
Simultaneous pressing of both keys.
■ Carry out zero point adjustment for relative and vacuum pressure measuring ranges in a
depressurised state.
■ Carry out zero point adjustment of absolute pressure ranges from 0 bar absolute
(vacuum). Since appropriate references are required for this, we recommend that this is
only carried out by the manufacturer.