Probe Retractor: Checking And, If Necessary, Adjusting The Position Indicator (Probe End Position) - ABB SCK System Manual

Probe retractor: Checking and, if necessary, adjusting the position
indicator (probe end position)
Meaning
Maintenance interval
Illustration
Function of the
position indicators
Safety
measures
202
During operation, the probe position indicators may need to be readjusted. This
can be causes, for example, by loose fastening elements.
 every six months (or as required)
There are two inductive position indicators and one mechanical position indicator in
the probe retractor. The two inductive (1, 2) indicators are mounted on the probe
carriage and travel together with the probe, the mechanical position indicator (3) is
permanently mounted on the retractor.
The above-mentioned position indicators signal to the controller that the gas sam-
pling probe has reached the respective position. The position indicators given in
the above illustration signal the following positions:
No. Limit switch
Inductive position indicator
1
-B71
Inductive position indicator
2
-B72
Mechanical position indi-
3
cator -S72
Always take the following safety measures when performing this work:
 Wear the general protective equipment.
 Before commencing any work on the gas sampling system, turn the service
switch to ON and secure the service switch against unauthorized switching (with
a padlock).
 Additionally press the EMERGENCY STOP switch before working on the retrac-
tor or probe.
 Do not enter the danger area around the retractor until it is at standstill and the
warning lamps and buzzer are off and the flap valve is closed.
 Do not perform the work until the gas sampling system has cooled down.
System Manual SCK Gas Sampling System
Signal/position
The probe is completely inserted into
the kiln.
The probe is completely retracted.
The probe is retracted so far that it
has reached the mechanical limit of
the pneumatic motor.
42/23-81 EN Rev. 4