ABB ProKiln GAC400 Operating Instruction page 70

70 ProKiln GAC400 PROBE GAS SAMPLING SYSTEM | OI/GAC400-EN REV. A
... 9 Operation
... Adapting the cleaning procedure of the probe
Clean in AUTOMATIC mode (time-controlled)
Clean in AUTOMATIC mode (time-controlled) will run as follows,
according to factory configuration:
Phase Description (Default settings shown)
1 The heated sample shut-off valve closes to protect the gas analysis
system (if available)
2 The customer's air cannon is activated to clean out the area where
the probe enters the process
3 The probe centre-nozzle air blaster activates according to settings
(3 blasts)
4 The probe filter periphery air blaster activates according to
settings (2 blasts)
5 The probe filter blow-back activates according to settings (3 blow-
backs)
6 The probe centre-nozzle air blaster activates according to settings
(1 blast)
7 The probe filter periphery air blaster activates according to
settings (1 blast)
8 The probe pressure-release valve activates according to settings to
release potential overpressure in a blocked sample heated line (if
available)
9 The heated sample shut-off valve opens to allow flow of measuring
gas towards the gas analysis system (if available)
The complete cleaning cycle in automatic mode is composed of
the following 2 processes that will run sequentially at specific
time-intervals that can be configured in the operation panel:
Process Description
1 Phases 1 to 9 will run as described above
2 Probe moves out to position S2 inside the insertion tube to scrape
off any adhering material, then goes back to measuring position
S3. The probe never leaves the insertion tube so as to prevent any
dust to be blown outside of the process.
Clean in AUTOMATIC mode (remote control via network
connection)
Clean in AUTOMATIC mode (remote control via network
connection) will run as follows:
Phase Description
1 Phases 1 to 9 will run as described above, after activation signal is
received by the system controller - See the as build EL-
DOCUMENTATION FOR PROBE SYSTEM enclosed inside the control
cabinet when supplied..
Clean in AUTOMATIC mode (by monitoring vacuum at the
gas analyzer system)
Note
Clean in AUTOMATIC mode (by monitoring vacuum at the gas
analyser system) is only possible in combination with the
AO2000-System.
Clean in AUTOMATIC mode (by monitoring vacuum at the gas
analyser system) will run as follows:
Phase Description
1 If an ABB AO2000-System is connected via Modbus RTU to the
ProKiln GAC400, it will send a signal to the probe gas sampling
system controller if the sample vacuum pressure exceeds a
maximum value set in the gas analysis system (exceeding vacuum
is a symptom of clogging)
2 Phases 1 to 9 will run as described above
This cleaning cycle is repeated up to three times. If this does not
remedy the error (i.e., vacuum still exceeds maximum limit), an
error message "3x Cleaning Not Successful" at system controller
is displayed and the probe gas sampling system switches to
error mode, while the probe is retracted out of the kiln. No more
cleaning processes and movements will take place after this until
the error is handled by maintenance personnel. See Irregularities
and corrective action on page 73 for further details.