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Ex p control unit
Motor purge controller
Operation
Rev. 0
01-37A2-7D0003_Operating instructions_MPC_20210923_0_en.docx
Page 55 of 96
7.13
Purge parameters
Purge mode tab
The Ex p control unit has two different modes for determining the purging time.
The setting for selecting the purge mode is made under purge parameters / purge
modes.
7.13.1.1
Manual / Automatic
Automatic
Automatic determination of purging time based on the pressure value p5
At the beginning of the purging phase, the control unit regulates to 87.5 % of the
permissible pressure value p5 (maximum purging pressure) and automatically
calculates the purging time corresponding to the measured pressure value p3
(purging pressure) and the stored purging air curves.
Manual
Manual determination of purging time
In this regard, the purging pressure p3 and the calculation of the purging time
must be carried out manually by means of the on the basis of the purging air
curves.