User Manual
SONO-MIX MINI Version 2_7
2017-05-12
Page 12
the batch. For applications without a PLC the “freezed” signal of the SONO probe can be used for
displaying the moisture value to a simple 7-segment unit as long as a new batch process will start.
With the parameter
Moisture Threshold,
the SONO probe can be configured to the start moisture level
where the summation starts automatically. Due to an automatic recalibration of SONO probes, it is
ensured that the zero point will be precisely controlled. The start level could be variably set dependent
to the plant. Recommended is a level with e.g. 0.5% to 1%.
With the parameter
No-Material-Delay
a time range can be set, where the SONO probe is again ready
to start a new batch process. Are there short material gaps during a batch process which are shorter
than the “No-Material-Delay”, with no material at the probes surface, then the SONO probe pauses
shortly with the summation.
Is the pause greater as the “No-Material-Delay” then the probe is ready to
start a new batch process.
Please note:
If the PLC already accumulates single moisture values in higher cycle rates, than an
additional automatic summation of a moisture quantity inside the SONO-probe during one batch
process will produce errors. Here mode CS is recommended.
How can the mode CC be used, if the SONO
probe cannot detect the „moisture threshold“ by
itself, e.g. above a conveyor belt if there is constant material covering above the probe head
over a longer time:
In this case, a short interrupt of the probe´s power supply, e.g. for about 0.5
seconds with the help of a relay contact of the PLC, can restart the SONO probe at the beginning of the
material transport. After this short interrupt the SONO probe starts immediately with the summarizing
and averaging.
Please note:
It should be noted that no material sticks on the probes surface. Otherwise the moisture
zero point detection of the probe will be shifted up and the probe would not be detect a moisture low
value below the “Moisture-Threshold”.
Time chart for mode CC
