Xylem WTW DIQ/S 281 Operating Manual page 101

DIQ/S 281
Testing the
operativeness
Settings
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In order to set up the Cleaning function for a relay output, the relay output must
be linked with a sensor (see section 6.4).
The relay of the combination output module assigned always works as a closer.
The cleaning cycle consists of Cleaning duration and Adjustment time.
During the cleaning cycle the Clean display flashes. The outputs linked with this
sensor are frozen. The maintenance condition (see section 4.8) is active.
After the Cleaning duration, the relay is opened. During the following Adjustment
time the outputs remain blocked.
The outputs linked with this sensor are only released when the cleaning cycle is
complete. The Clean display disappears. The maintenance condition is finished.
You can test the operativeness of the cleaning system as follows: Manually
open or close the relay with the Manual control function (see section 6.6.8) and,
while doing so, check the behavior of the cleaning system.
Alternatively, you can test the operativeness of the cleaning system by checking
the performance of the function at the start time set up (reference time ±
interval). To perform a test immediately, the reference time can be set so that
the next cleaning cycle will start in a few minutes (settings: see following table).
Setting
Reference time (h)
Reference time
(min)
Interval unit
Cleaning interval
Cleaning duration
Adjustment time
08/2020
Selection/Values
0 ... 23 h
0 ... 60 min
1 .. 7 d
1 .. 24 h
5 .. 60 min
1/2/3/4/5/6/7 d
or:
1/2/3/4/6/8/12/24 h
or:
5/10/15/20/30/60 min
0 ... 300 s
0 ... 900 s
Explanation
Time at which a cleaning cycle
is started. Further cleaning
cycles will be performed at the
times specified by the cleaning
interval.
Selection of range and unit for
the Reinigungsintervall.
Repeat interval for the
cleaning function:
Time between the start time of
a cleaning cycle and the start
time of the next cleaning
cycle*.
Duration of the cleaning
Time extension to allow the
sensor to adjust to the test
sample after cleaning.
Outputs
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