Commissioning of the water sampling station
24
© Lutz-Jesco GmbH 2020
BA-42840-02-V03
Water sampling station
EASYPRO COMPACT
Operating instructions
8.4 Commissioning of TOPAX
®
MC multi-channel controller
Outputs
Controller functions
Behaviour
Relays
Optocoupler
Ser
vomotor relay
Ser
vomotor 20 mA
x
On/Off
n
The output switches if a value is exceeded.
n
Hysteresis can be set from 0,1 – 50 %
x
x
Pulse frequency
2-sides pulse frequency
n
Relay: 10 – 100 pulses per minute
n
Optocoupler: 10 – 350 pulses per minute
n
The pulse frequency is dependant on the control deviation and the set control
parameters.
n
With a control output power of Y = 25 % and a maximum pulse frequency of 100
pulses/min., the controller would output 25 pulses/min.
x
Pulse length
2-sides pulse length
n
0 – 3600 seconds cycle duration
n
Relay output (e. g. for solenoid valve)
n
Depending on the control deviation and the defined control parameters, the relay
pulls in or drops out for the set cycle duration. If the cycle lasts 30 seconds and the
controller output power is 40 % the relay applies for example for 12 seconds,
followed by 18 seconds of non-application.
x
Servomotor with a
feedback potentiometer
n
A feedback potentiometer can be connected (1 – 10 kΩ) for servomotors with
position feedback.
n
Compensate the feedback potentiometer. During compensation, the servomotor is
first started and then stopped automatically.
x
Servomotor without a
feedback potentiometer
n
For servomotors without feedback.
n
Measure and set the runtime of the servomotor.
x
Continuous output
n
Continuous control output from 0/4 – 20 mA for the actuation of constant actors.
x
Servomotor with 20 mA
feedback
n
Servomotors which are controlled via 0/4 – 20 mA and have a 0/4 – 20 mA
position feedback.
Tab. 27: Functions of the individual controllers
Pre-conditions for actions:
ü
The installation of the water sampling station, the electrics, the
hydraulics and the measuring cells has been performed successfully.
ü
A facility is available for performing the DPD method for the manual
measurement of the chlorine content.
ü
The sample water is chlorinated.
Perform the following work steps:
1.
Take a sample of the process water and conduct the DPD method for
determining the chlorine content.
2.
Enter the measurement results for the values free chlorine according
to the instructions of the
TOPAX
®
MC
documentation on the
controller.
ü
The disinfection measuring cell has been calibrated success-
fully.
