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12. Start-up
12.1 Installation of electrodes and sensors
12.1.1 Reference electrode, pH and redox single-rod
electrodes
1. Unscrew the screw plugs of the holders (A, B) used for the
flow armature (F).
2. Remove the moisture retention caps of the electrodes or
single-rod electrodes (A1, A2, B1) used, and keep them for
possible electrode removal.
3. Screw in the electrodes or single-rod electrodes (A1, A2, B1)
used by hand into the holders (A or B).
Observe the installation and operating
Caution
instructions of the electrodes!
A
Fig. 10 Holders for electrodes
12.1.2 Water sensor
The water sensor (O) is optional.
Note
The holder for the water sensor is on the float
body.
1. Screw the water sensor (O) into the appropriate holder of the
measuring cell, and secure it using the screw.
2. Slacken the screw (O1), insert the water sensor as far as it will
go (O), and gently tighten the screw.
O
O1
Fig. 11 Holder for water sensor
12.1.3 Temperature sensor
The Pt100 temperature sensor is integrated into
Note
the measuring electrode (D).
14
B F
F
12.2 Water connections
Only tighten the union nut by hand. Do not use
Caution
any tools!
Observe the local pressure! The permissible
primary water pressure is 0.3 to 3.0 bar. Fit a
Caution
pressure booster pump, if necessary. Check the
tightness of the measuring cell.
To avoid a siphon effect: Let the sample water
Caution
outlet (U2) point downwards. There must be no
counter-pressure (open outflow)!
1. Close the shut-off spindle for sample water inlet (V1) and
outlet (V2).
2. Connect the sample water inlet and outlet to the connections
for the sample water inlet (U1) and outlet (U2).
V1
U1
Fig. 12 Water connections
12.3 Floater stopper
The measuring cell is supplied with a built-in floater stopper. If the
sample water flow rate is increased, the float body (N) will
therefore not move outside of the detection range of the water
sensor (O). See the figure in section 12.3.1 Removing the floater
stopper. An alarm is not triggered, and the control output remains
active.
The advantage of this is that in the event of frequent peaks in the
sample water flow rate, the alarm is not continuously triggered,
and the control output remains active.
Warning
If the sample water flow rate is set too high or is
increased temporarily, no alarm is triggered and
the control output remains active!
If the sample water flow rate is set too high or is
increased temporarily, there is a risk that the
sample water will overflow at the overflow
mechanism. In this state, no alarm is triggered,
and the control output remains active!
If the detection range of increased sample water flow rate is to be
activated, the floater stopper must be removed. When the floater
stopper is removed, an alarm is triggered, and the control output
is disabled each time the sample water flow rate is increased.
V2
U2
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