Sensors With Liquid Electrolyte; Installing The Sensor - Knick SensoGate WA 133 Series User Manual

22

Installing the Sensor

Conditions:
• Sensor: 250 mm, Ø 12 mm, e.g., Knick SE 551
• Air pressure in the sensor pressure chamber: 0.5 to 1 bar above that of the process medium to
ensure that the electrolyte flows from the reference electrode to the process medium
AL
R
S
W
A
E

Sensors with Liquid Electrolyte

Note: Observe the user manual of the sensor.
In the case of inclined installation, turn the elec-
trolyte filling hole (W) of the sensor towards
the top to prevent electrolyte from flowing out.
Check whether the sensor is damaged
(glass broken?).
Remove the watering cap from the sensor tip
and rinse the sensor with water.
1. Before installing the sensor, make sure
2. Loosen the small coupling nut (R) – do not
3. Unscrew and remove the large coupling
4. Insert the sensor (A) through the gaskets
5. Replace the sensor holder you have
6. Connect the air pressure for the sensor
7. Connect the cable jack.
8. Connect the equipotential bonding cable to
F
SensoGate WA 133
that the retractable fitting is in SERVICE
position (see page 17 for information on
installing or removing a sensor).
remove it.
nut (S) and pull the detached sensor holder
upwards.
and Teflon washers.
Push the sensor downwards.
Carefully continue pushing the sensor
against the resistance of the gasket in the
immersion tube until it reaches the stop
position.
detached in step 3.
Hand-tighten the large coupling nut (S) and
then the small coupling nut (R).
pressure chamber to the NW 6 connection
nipple (AL).
Hold the cable in a loop and fix it using
clamp (E).
Note: The cable loop must be long enough
so that the cable does not impede the
stroke movement of the retractable fitting.
terminal (F) (if required).