Mettler Toledo InTrac 777-SL Instructions D'utilisation page 31

InTrac ® 777-SL / InTrac
Warning!
– Retractable housings may only be stripped down after having
– Only perform the dismantling work described in this Section
– Ensure the use of seals of the correct quality (see Section 8).
To replace the seals, proceed as follows:
1. Shut down the housing (see Section 4.4).
2. Remove electrode/sensor from the housing (see Section
3. Remove the housing from the vessel (see Section 4.5.2) and
4. Unscrew the 4 screws of the lock chamber fastening and
5. Remove the indicated seals from the lock chamber and the
6. Lightly grease new O-rings (set of seals) with lab grease!
© 06/00 Mettler-Toledo GmbH, CH-8606 Greifensee
Printed in Switzerland
® 776-SL
been completely dismounted.
and replace only the seals (O-rings/scraper ring) shown in
the figure above. Check the quality of the seals and exami-
ne for possible damage. Ensure correct positioning.
4.5.1) and store it as described in the electrode/sensor ope-
rating instructions.
place it on a clean working surface.
Warning! Never place the housing on the front end of the
immersion tube or the centering spigot (risk of damage).
carefully remove lock chamber from guide tube by tapping it
lightly with a plastic hammer.
immersion tube with a thin hook (see fig. below). Ensure that
you do not scratch the contact surface.
Lock chamber:
– O-rings "2"
®
(VITON : ø17.86x2.62, KALREZ
Immersion tube:
– O-ring "1"
®
(VITON : ø10.50x2.70, KALREZ
Centering spigot:
– O-ring "3"
®
(VITON : ø20.24x2.62, KALREZ
Important! No grease my be applied to the O-ring "1" in
the immersion tube as there is a danger that grease could
adhere to the electrode/sensor tip when the electrode/sensor
is reinstalled and have adverse effects on its function.
®
: ø18.72x2.62)
®
: ø10.78x2.62)
®
: ø20.30x2.62)
InTrac 777-SL-04-CH
52 400 841
31