Commissioning
Ex p Control unit
APEX
py
Page 78 of 96
01-37A2-7D0006_py_Manual_Exp-Control-Unit_20210923_a_en.docx
Rev. 0
Setting the “Ex p parameters / pressure parameters“
The pressure parameters to be observed are part of
IEC / EN 60079-2.
Furthermore, the pressure parameters are application-dependent and
must be checked during initial commissioning.
The following values can be applied as a basic setting:
po = 2.5 mbar (250 Pa)
p1 = 1.0 mbar (100 Pa)
p2 = 1.5 mbar (150 Pa)
p3 = Automatic determination by Ex p control unit
p4 / p5 = Application-dependent, e.g. pressure-sensitive components?
Procedure
Connect PC with Ex p control unit, activate programming switch
Login to the WEB interface with the user level
Call up the Purge parameter / Pressure parameter menu
Enter and confirm the "po - operating overpressure" parameter
e.g. 250 Pa (2.5 mbar)
The value "po" is the internal operating overpressure of the pressurized
enclosure. This value is monitored by the Ex p control unit and
compensated if necessary.
Pop-up window with display changed value opens
Confirm pop-up window with changed value
Enter and confirm pressure parameter "p1 - minimum pressure
e.g. 100 Pa (1.0 mbar)
Pop-up window with display changed value opens
Confirm pop-up window with changed value
Enter and confirm pressure parameter "p2 - Pre-alarm"
e.g. 150 Pa (1.5 mbar)
Pop-up window with display changed value opens
Confirm pop-up window with changed value
… Follow the same procedure for the other pressure parameters
Deactivate programming switch
