Xylem WEDECO SMOevo PLUS Series Original Manual page 110

OFF
ON
Status
Status indication of the Trim function
Disabled
Stand-by
Normal Operation
Fault
Start-up Delay
Start-up Delay (T = Time)
Measuring the ozone in the process is possible after a certain introduction time only. The
start of the Trim function must be delayed by this time. After this delay time, the Trim function
starts the Dose correction.
The start-up delay is set via the input field. When the Trim function is in operating status
"start-up delay", the remaining start time can be read in the output field.
Operating Mode
Time Control Mode – Interval
After the start delay time, the timer for the control interval starts. The setpoint / actual value
comparison is not carried out continuously, only after the control interval is completed. After
the comparison the interval starts again. The control inverval is set via the input field.
When the Trim function is in operating status "Normal Operation", the remaining time until the
next setpoint / actual value comparison can be read in the output field.
Volume Control Mode – Interval
After the start-up delay has elapsed, the Trim function starts summing up the current process
water flow at intervals of one minute. Depending on the set reaction volume (Trim
parameter), the time is calculated how much time remains until the reaction volume is
completely exchanged. As soon as the reaction volume is completely exchanged, the interval
starts again.
The calculated time until the next setpoint / actual value comparison can be read in the
output field.
Process Value (Ozone in water / ozone in offgas / Redox value)
SP
PV
Manual_SMOevoPLUS_eng_01.2019.doc
Manual Ozone Generating System SMOevo
Ozone Dose correction is not carried out.
Dose Trim output = 0.0%
The Trim function starts once the start sequence is completed and
the converter is in operation.
Function is off.
Function is ready for operation (ozone production is off).
Function in normal operation, calculation of the correction factor.
Refer to Fault Messages.
Start time not elapsed, see current time (T).
Setpoint in ppm,g/Nm³,mV of the process feedback variable
Actual value in ppm,g/Nm³,mV
PLUS
Operation
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