Hydronix Hydro-Control VI, Operator'S Manual

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Using Moisture Control Chapter 8
48 Hydro-Control VI Operators Guide HD0456 Rev 1.7.1
Unscaled
Time
Mixer
Loading
Dry Mix Time
Main Water
Addition
Wet Mix
Time
Discharge
Largest Unscaled
difference
Very small Unscaled
difference
100
0
Figure 22: Comparing Measurement Modes
2.11
Dry weights
If the raw material dry weights change between batches then this value must be updated in the
recipe. This can either be manually entered for each batch or sent by the control system to the
Hydro-Control. Using incorrect values will result in the calculation incorrectly determining the
moisture change for the calibration.
Even when using a mixer moisture control system, it is important to correct for the weight of the
moisture in the raw material being used to ensure that the mix design is consistent. Any
moisture in the raw materials will affect the weight of raw material dosed and will affect the
aggregate/cement ratio.
It is important to use a control system that controls all of the raw materials being added into the
mixer, in particular all materials should be added to the mixer in the same order each time and
admixtures should be dosed at the same time during the cycle so that the effect of any materials
on the sensor signal is consistent.