P
AGE
16
S
PECIFICATION AND
O
VERVIEW
C
HAPTER
2
2.5
Operation principle of Sycon 2501
An analysis cycle consists of 5 steps
[1]
Start delay:
The analysis start can be delayed by between
1 and 30 min (0 = no delay)
When monitoring hot water, it is necessary to cool the
water before it can be analysed. A cool water valve can
be opened via
REL 3
. The delay time should be set to
ensure that the water is cool enough before the inlet
valve is opened and the analysis begins.
↓
[2]
Washing and rinsing measuring-chamber with
sample water.
Programmable rinsing time: 5 sec-10 min
When the inlet valve is opened, the measuring-
chamber and pipes are rinsed until all traces of the
previous analysis are removed and the new water
sample is in the chamber.
↓
[3]
Filling measuring-chamber with sample water.
Monitoring of zero transmission without injection
of reagent
Before an analysis begins, an internal calibration takes
place based on a water sample without reagent
content. If the LED is defect a fault will be reported.
↓
[4]
Stirring water sample and injecting reagent.
Homogenisation and reaction phase while
stirring
The dosing pump injects a defined amount of indicator
into the water sample. The stirrer coil, activated at the
same time, mixes water and reagent. The reagent
causes colouration of the water sample in accordance
with the hardness components of the water. Reagents
are calibrated to change colour at certain limit values.
When unreasonable values are registered
– e.g. no
reagent - a fault will be reported.
↓
[4.1]
Monitor light transmitted through the sample
water.
Evaluation of water hardness limit value alarm
Results are shown by the red/green LED. If the limit is
exceeded, an alarm will be set off. The result of the
analysis is evaluated on the following basis:
Below the limit = Good (green)
Over the limit = Bad (red)
NB. The result is inverted if switch S9
is set to ‘ON’.
↓
[5]
Flushing and rinsing measuring-chamber
NB: During Interval measuring-chamber is kept filled
with water.
Analysis start:
A automatically in 4 programmable
intervals: (0)15 / 30 / 60 / 120 minutes
B manually by pushing the Start-button
C via an external switch if the
programmable switch S10
is ‘ON’
Attention! If the interval (0)15 is
programmed, analysis runs can only be
triggered through an external switch
(interval 0 minutes).
By means of a flow monitor or a timer, the analyses
can be suppressed during periods when the water
conditioning system is switched off or in
regeneration, or no samples are being taken.
In this case the programmable switch S10 must be in
‘OFF’ position.
