Description Of Function; Manually Operated Housings - Mettler Toledo InTrac 777-SL Instructions D'utilisation

InTrac ® 777-SL / InTrac
3.3

Description of function

With the InTrac
ings, electrodes/sensors can be cleaned or replaced without in-
terrupting the ongoing process. Furthermore, it is possible to cali-
brate the measurement system with the electrode/sensor install-
ed, using appropriate ancillary equipment.
3.3.1

Manually operated housings

– InTrac
– InTrac
For manual versions, the immersion tube is moved into the desir-
ed end position ("Measuring" or "Maintenance") by hand after
releasing the locking pin "B" by pulling out the red knob.
Important: The housings are equipped with an automatic sen-
sor detection arrangement. If no electrode/sensor has been fitt-
ed in the housing, it is not possible to release the locking pin.
The housing remains in a locked position.
A
B
A
B
© 06/00 Mettler-Toledo GmbH, CH-8606 Greifensee
Printed in Switzerland
® 776-SL
® 777-SL and InTrac
® 777-SLM
® 776-SLM
"Measuring" position, manual versions
In the "Measuring" position, the immersion tube is fully
inserted. The process medium flows past the tip of the
electrode/sensor through the openings at the end of the
immersion tube.
O-rings seal the housing against ingress of process
medium.
In the "Measuring" position the locking pin must latch
into the groove of the immersion tube. In addition, the
positioning pin "A" must engage the recess in the hand-
le (protective sleeve). To do this, rotate the immersion
tube clockwise until pin "A" engages the groove.
"Maintenance" position, manual versions
In the "Maintenance" position, the electrode/sensor can
be cleaned or removed/exchanged, or the complete
measuring system calibrated with the electrode/sensor
installed. O-rings seal the housing against ingress of
process medium.
In the "Maintenance" postion the locking pin "B" must
snap into the hole in the piston. This is achieved by
turning the immersion tube clockwise.
® 776-SL retractable hous-
InTrac 777-SL-04-CH
52 400 841
11