Knick Ceramat WA 153, Руководство пользователя

Страница: 21 / 44

21
Installing/Removing a Liquid-Electrolyte Sensor
15° 15°
pH Sensors
You can use sensors with a length of 250 mm and an electrode diameter of 12 mm, eg, Knick SE 551.
To ensure that the electrolyte flows from the reference electrode to the process medium, the air pressure in
the sensor pressure chamber must be 0.5 to 1 bar above that of the process medium. We recommend the
ZU 0670/1 or ZU 0670/2 module (see “Accessories” on page 35) to maintain the defined overpressure in the
pressure chamber of the sensor.
It is connected to the sensor pressure chamber via connection nipple (NW 6 mm) (A).
Check whether the sensor is damaged (glass broken?). Remove watering cap from the sensor tip and rinse
sensor with water.
SER
VICE
PR
O
C
E
SS
ca. 7
0°
As the Ceramat performs a rotary movement in
addition to the stroke movement, you must posi-
tion the sensor (D) in a way that the filling hole (B)
(eg, Schott) or the “TOP” labeling (eg, Mettler)
(C) of the sensor is turned out of the vertical by
approx. 70° when the sensor lock-gate is inclined
(see figure).
Only this prevents electrolyte leakage during
movement of the Ceramat.
A
Within the permitted installation angle the probe
can be positioned as desired (at least at 15°).
B
C
D
NOTICE
In the case of inclined installation, the sensor
must be installed as described below to prevent
electrolyte from flowing out during operation of
the sensor lock-gate. First, move the sensor lock-
gate into SERVICE position.