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9.1.1 Replacing the PTFE washer in the quick-change fitting
✱
Turning the handwheel (6) left (counter-clockwise) opens the
fitting and moves the sensor out of the process medium.
✱
Unscrew the gas-sensitive ammonia sensor from the fitting.
✱
Dismantle the fitting: Loosen the three hexagon socket screws
(1) (do not unscrew them completely)
✱
Pull the electrode fixture (2) out of the fitting.
✱
Unscrew the cap (5) on the lower end of the electrode fixture (2).
✱
Replace the PTFE washer (4).
(1)
Hexagon socket screws M4
(2)
Electrode fixture
(3)
O-ring
(4)
PTFE washer
(5)
Cap (stainless steel, wrench size 16, max 3.5 Nm)
(6)
Handwheel
16
(1)
(2)
(4)
(5)
(6)
(3)