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Operation
7.14 Manual purging phase
Determining the purging pressure p3
Page 60 of 96
Manual purging phase - The Ex p control unit can be programmed manually with
the determination of the required pressure values, which are the data needed for
the purging. This means that all values, such as purging pressure p3 and the
corresponding purging time are permanently written into the memory.
In order to determine the purging pressure p3, the pressurised enclosure must
be closed and the Ex p control unit put into operation.
Procedure:
Call up the Purge parameters / Purge modes menu
Activate the Manual button by clicking on it;
The Manual button changes from
Call up the Purge parameters / Pressure parameters menu
Use the keypad to increase the setpoint "p3" and confirm with the "Enter"
key.
e.g. 15 mbar
Confirm pop-up window with the changed value
Deactivate programming switch
Call up the Status menu
Establish purge gas connection and set inlet pressure at the pressure
reducer.
e.g. 2 bar
Ex p APEX control unit into purging phase.
Record and note maximum "p3" actual value.
e.g. recorded value = 6.5 mbar
Activate programming switch
Perform re-login in the WEB interface
Call up the menu Purge parameters / Pressure parameters
Use the keypad to set the setpoint
Set "p3" to 6.0 mbar and confirm with the "Enter" key.
e.g. recorded value 6.5 mbar – 0.5 mbar = 6.,0 mbar
Confirm pop-up window with the changed value
Call up the Purging parameters / Purging modes menu
Enter the time for a purge test via the keyboard at Purging Time.
e.g. 30 seconds
Confirm pop-up window with the changed value
Deactivate programming switch
Call up the Status menu
The Ex p control unit starts and the purging time begins to count down.
01-37A2-7D0003_Operating instructions_MPC_20210923_0_en.docx
Motor Purge Controller
to
Ex p control unit
Rev. 0
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