18
be watered for approx. 2 hours prior to measurement.
It then needs to be recalibrated.
b.) The sensors may only be used with the correspon-
ding units. The use of the sensors in combination with
unsuitable units can destroy the unit and the sensors!
c.) Unit and sensor must be handled with care and
used in accordance with the technical data outlined
above. Always protect the connector and connection
socket against soiling and dirt.
d.) Do not insert the connector at an angle. If the con-
nector is inserted properly, you should be able to press
it in without using force.
When disconnecting the sensor, do not pull it by the
cable but always by the connector sleeve.
e.) Remove the sensor storage cap before performing
measurements.
11.3 Design of the sensor
The housing of the sensor probe is made of PVC. With
the exception of the sensor shaft, all parts must be
serviced regularly and replaced if necessary.
Storage cap: The storage cap is used to moisten the
membrane. This increases the service life of the sen-
sor. The storage cap contains deionised water.
Membrane cap: the diaphragm head is covered with
a Teflon membrane.
The diaphragm cap is filled with KOH electrolyte and
screwed onto the sensor shaft in such a way that the-
re are no air bubbles.
Sensor
shaft
O - R i n g -
seal
membrane
cap
Refill
opening
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