Hydronix Hydro-Control VI Installation Manual page 65

Chapter 5 System Design
START MIX COMPLETE
Pre-wet 1st Main 2nd Main
Add Wet Mix
Water Dry Mix Water Dry Mix Water
Cement Time
Added Time Addition 1 Time Addition 2
Moisture
Time
Admix Type Set to: Admix Output
Water
Admix
All
Admix Enable %
Point set by the "Admix Enable"
parameter in the recipe
Figure 45: The Admix output signal during a 2-step mix cycle
If the recipe is configured to 2-step addition mode then, when the Main Water addition is added
using Preset Mode, the mix cycle will add the Main Water to the mixer in two portions, defined
by the Admix Enable parameter in the recipe. After Main Water Addition 1, the Dry Mix phase
will be run a second time.
At the end of each of the Dry Mix phases, the system will obtain an average reading of the
sensor value as defined by the 'Averaging Time' parameter in the System Parameters.
If this 2 step batch is used to calibrate a recipe, then a second gain and offset value will be
calculated for the recipe and this will be used to calculate the moisture whenever the unscaled
value rises above the average unscaled vale from the second Dry Mix phase. This will happen
in either AUTO or CALC Modes.
This functionality is useful if an admixture is being used which makes a large change to the
calibration of the material in the mixer. The 2 step addition mode will rescale the moisture
display on the graph on the main screen so that it is more representative of the moisture in the
mixer.
Hydro-Control VI Installation Guide HD0455 Rev 1.9.0 65