Mettler Toledo InTrac 776-SL Betriebsanleitung Seite 17

InTrac ® 777-SL / InTrac
Effect of intermediate position of versions with
immersion depth H = 70 mm
When inserting and retracting the housing and if the mobile part
should become positioned between the proper IN and OUT end
positions, the process fluid may flow out through the lock cham-
ber and flushing lines. This could create a hazard for personnel,
equipment and environment.
Recommendation for proper operation and safe use
All flushing lines must be equipped with valves which may only
be opened when the retractable part of the housing is in the main-
tenance position. After the flushing and maintenance of the sen-
sors, the flushing valves must be closed.
Basic installation
The basic installation is intended for cleaning/flushing of the
electrodes/sensors when the housing is in the "Maintenance"
position.
– Inlet:
– Outlet:
© 06/00 Mettler-Toledo GmbH, CH-8606 Greifensee
Printed in Switzerland
® 776-SL
A
The inlet line is connected to rinsing water inlet "A" (thread
G 1/8") of the housing via an appropriate shut-off device
(dependent on the control unit used).
The permitted water pressure is 2 bar.
For the water outlet, rinsing water outlet "B" (thread G 1/4")
is connected to a suitable drain (comply with local regula-
tions).
Important! The water outlet should be positioned somewhat
higher than the inlet so that the lock chamber is always fill-
ed with water or buffer solution, and the pH electrode/ sen-
sor cannot dry out even when the inlet is closed. If need be,
use a suitable lead-off (first upwards) to the outlet line to
ensure this.
B
InTrac 777-SL-04-CH
52 400 841
17