Hydronix Hydro-Control VI, Installation Manual

Page: 67 / 104

Chapter 5 System Design
Hydro-Control VI Installation Guide HD0455 Rev 1.9.0 67
On the overview screen the mix time will appear twice as long as the time set in the recipe. The
auto-track process is as follows:
• Mix until mix phase time is less than the mixing time minus the auto-track time
• Record the sensor value and start auto-track. Two green lines will appear on the graph
to indicate the plus and minus tolerance of the auto-track
• If the sensor value moves outside of the recorded sensor value +/- auto-track deviation
re-start auto track
• If the sensor reading stays within the auto-track bounds for the auto-track time exit the
mix phase
• If the system has not exited the mix phase for the mixing time entered in to the recipe
times 2 an alarm is issued allowing the user to select whether to repeat the phase (the
mix time is automatically doubled in the recipe) or to exit out of the mix phase and
continue with the rest of the cycle
4.4.1 Auto-Track with Preset Mode
Auto-Track can be used with Preset mode to ensure that the sensor reading is stable at the
end of the dry and wet mixes. When the system is running with Auto-Track, the average
taken at the end of each of the mixing phases is the average value during the Auto-Track
time and not that defined by the Averaging Time value in the System Parameters. This will
ensure that any values used for calibration are representative of the sensor value in the
mixer.
4.4.2 Auto-Track with CALC Mode
When Auto-Track is used with the CALC Mode, the Auto-Track parameters should be set
so that the Dry Mix Deviation gives a stable reading (for example, 0.1%) for the calculation
as described in the previous section. The Wet Mix Deviation should be set dependant on
the quality of the concrete required.
4.4.3 Auto-Track with AUTO Mode
Auto-Track can be used with AUTO Mode on the dry mix to achieve a degree of homogeneity
from which to start adding water. This can be useful if raw materials sometimes vary in
moisture causing differences in the initial mixing action (for example, if the cement takes
longer to homogenise due to wetter aggregates). During the wet mix the Auto-Track can be
used to control the final homogeneity of the mix.