FLK Gas Sampling System - MPIP - Free

SQ250 FLK Gas Sampling System
If the coolant temperature briefly reaches 230°C, normally no more gas bubble formation occurs.
Caution:
The probe temperature and therefore the coolant temperature must only briefly attain 230°C since
otherwise the probe may be damaged.
When heating the coolant, all the flange joints and welded seams should be checked for sealing, since the coolant is
substantially thinner at high temperature. Any leaks occurring must be immediately remedied. It is essential to retighten the
screws on the flange joints after heating the cooling system.
3.2.6 Measures for emergency-stop
It is recommended that the area around the probe (including traversing path) is closed off and access to this area restricted to
authorized personnel. Within this area an emergency-stop button, can be fitted which stops the automatic traversing of the
probe when operated.
Caution:
If the emergency-stop button is pressed, a dangerous condition can arise. For example, if the probe is still in the
hot range and a fault occurs causing overheating of the probe (coolant flow >min.).
To prevent damage of the probe, the emergency-stop button (with latch) should be released
as soon as possible.
With power failure the compressed air motor is used to withdraw the probe, even thought the
emergency-stop button is pressed.
While ever the emergency-stop button is operated, the red fault lamps in the PLC controller and on the local control panel
flash and cannot be cancelled.
3.2.7 Automatic probe retraction
In order to be able to test the automatic insertion and retraction in a short time the hours timer TMR 10 must be set to a
minutes timer by entering 60, i.e. the interval for retraction and insertion is now counted in minutes instead of hours.
The time up to the start of "Retraction" can be read in the CTR 6 after manual insertion and switching to automatic (enter a
minimum of 10min.).
When this period expires, the horn and flashing light for the traverse warning turned on. When the horn time expires, the
probe starts to retract. When the retraction is finished, the flashing light stops and the waiting period up to the re-insertion
starts (TMR 0). Then the retraction warning starts and automatic insertion takes place.
In this operating mode the signals, e.g. contactor fault (ESS INSERT, ESS WITHDRAW) and the time delay signals
(DELAY INSERTION / RETRACTION) can be simulated.
Once these tests are concluded, the TMR 10 must be set to 3600 sec. again.
The required time interval for automatic insertion / retraction can be entered in the CTR 6 again in hours.
The indicating lamps on the local control panel and on the controller flash if no analysis is not being carried out, i.e.: the
measuring gas pump is switched off, also with the purging process running.
Copyright ® SIEMENS Page 21 04/04