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Ex p Control unit
APEX
mv
9 Functional test and procedure
Safety during operation
DANGER
DEATH OR SERIOUS INJURY CAUSED BY DAMAGED EXPLOSION PROTECTION
MEASURE.
Safe operation of the control unit is no longer possible.
Risk of an explosion
Deactivate the APEX control unit and secure to prevent it restarting.
RISK OF DEATH OR SERIOUS INJURY WHEN INCORRECTLY SETTING THE PRESSURE
PARAMETERS
Risk of an explosion.
Set the pressure parameters carefully and conduct a functional test.
Functional flow diagram for the Ex p control station
Ex p control flow chart
Rev. 0
Operation of pressurized equipment can be divided into two or three phases.
With gas applications there are three phases, while with dust applications there
are just two because the purge phase is replaced here by manual cleaning.
With the previous chapters the required parameters and functions were defined
and stored to the control unit.
The following parameters have been defined.
Purge program / Purge mode
Operating pressure for the Ex p equipment (po)
Shutdown when pressure falls below minimum (p1)
Pre-alarm for minimum pressure (p2)
Purge pressure (p3), depending on "Manual / Automatic" purge modes
Maximum pressures during operation and purge (p4 and p5),
depending on applied rinsing program
Applied pressure outlet device, for automatic purging
Volume of protected Ex p equipment, for automatic purging
The Ex p control executes the following sequence during commissioning:
Activation
Safety state
- Ex p Control Unit -
- Pre pressure exceeded
Pre-Purge-Condition
fullfilled
- Ex p Control Unit -
01-37A2-7D0005_MV_Manual_Exp-Control-Unit_2021005_0_en.docx
Purge time
counts down
- Flow
reached
- Ex p Control Unit -
Functional test and procedure
Parameter mode
- Active parameter switch
-
Minimum pressure drop
-
Maximum pressure exceeded
-
Electronic failure
- Countdown
ready
Ex p Equipment
in Ex safe state
Page 67 of 80
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