Operation; Important Information For Everyday Operation; Inspection Work In Everyday Operation - Mettler Toledo InTrac 777-SL Instructions D'utilisation

InTrac ® 777-SL / InTrac
5.

Operation

5.1

Important information for everyday operation

– Force must never be used to move the immersion tube into
– During operation, the following should never be loosened:
– If any malfunctions occur during operation, the equipment in
– For all work in everyday operation, wear the stipulated pro-
5.2

Inspection work in everyday operation

The following inspection work should be performed in everyday
operation:
• Check all systems (air, rinsing water and, if used, buffer solu-
• Check fastening (ring nut, flange, NPT-thread) of the hou-
• Check the condition of the electrode/sensor. A faulty or dama-
Housings with pressure compensation (InTrac
• Check functioning of pressure gauge.
• Check air pressure in upper part (pressure gauge). The air
• Check level of the reference electrolyte. The level of the refe-
© 06/00 Mettler-Toledo GmbH, CH-8606 Greifensee
Printed in Switzerland
® 776-SL
the "Measuring" position without an electrode/sensor install-
ed, otherwise process medium can flow out via the open
immersion tube!
– the lines of the pneumatic system or of the rinsing and
buffer solutions.
– all fastening components (flange fastening, ring nut,
etc.).
which the housing is installed must first be made safe.
tective clothing (eg. protective goggles, gloves, breathing
apparatus, etc.).
tions) for leaks.
sing at the vessel for firm seating and leaks.
ged electrode/sensor must be replaced immediately.
pressure must be at least 0.5 bar and maximum 2 bar abo-
ve that of the sample medium (take hydrostatic pressure of
the sample medium into account) to ensure the electrolyte
flow from the reference electrode to the sample medium.
Note: The desired overpressure is set with a bicycle pump
via the valve core at the pressure gauge or established by
means of a compressed air supply.
rence electrolyte is steadily lowered owing to outflow through
the diaphragm. If the liquid level has sunk to below the bulb
mouth of the pH/redox electrode, the reference electrolyte
must be topped up (see Section 6 "Maintenance").
® 776-SL):
InTrac 777-SL-04-CH
52 400 841
27