2017-05-12
User Manual
SONO-MIX MINI Version 2_7
Page 27
5. Installation of the Probe
The installation conditions are strongly influenced by the constructional circumstances of the respective
mixer types. The ideal installation location must be established individually. The following guidelines
should hereby be observed.
5.1. Assembly Instructions
The following instructions should be followed when installing the probe:
The installation locations may not be situated beneath the inlets for additives, water and cement.
In case of an uneven base, the probe must be installed at the highest point of the base. No water
may accumulate at the probe head as this could falsify the measurement.
Areas with strong turbulences are not ideal for the installation. There should be a continuous material
flow above the probe head.
The stirring movement of the mixer blades should be conducted without gap above the probe head.
The probe should not be installed in the direct vicinity of electrical disturbing sources such as motors.
The probe may not project into the mixer. The installation height of the probe may possibly have to
re-adjusted due to wear of the mixer blades, arms and the mixer base. No material may deposit on
the probe head as this could falsify the measurement.
In case of curved installation surfaces in the mixer, the centre of the probe head should be flush with
the radius of the mixer wall without disturbing the radial material flow in the mixer. The probe may not
project and come in contact with blades or wipers.
Attention! Risk of Breakage!
The probe head is made of special steel and a very wear-resistant ceramic in order to warrant for a long
life-span of the probe. In spite of the robust and wear-resistant construction, the ceramic plate may not
be exposed to any blows as ceramic is prone to breakage.
Attention! Risk of Overvoltage!
In case of welding work at the plant, all probes must be completely electrically disconnected.
SONO-probes need a stabilized power supply with 12V-DC to max. 24 V-DC. With unstabilzed power
supply there is the risk of overvoltage. We strongly suggest not to use unstabilized power supplies.
Attention! Risk of Malfunction!
1. In larger concrete plants it could be possible, that there are different mass potentials for different
power lines in use, especially if the PLC is installed in larger distances to the moisture probe. Here it
could come to problems that the analogue moisture signal 0(4)..20mA could not be measured
correctly in the PLC. With such a problem we recommend to use an isolated powerbox for the SONO
probe. Available upon request by IMKO.
2. Take care that there are no other electromagnetic fields nearby the SONO probe. E.g. another
moisture probe installed beside or in opposite of the SONO probe could influence the measurement
field.
Any damage caused by faulty installation is not covered by the warranty!
Abrasive wear of sensor parts is not covered by the warranty!
