Hydronix Hydro-Control VI Installation Manual page 49

Chapter 4
Material addition/Mixing Times
Parameter
Dry Weight
Cement Weight
Cement Timeout
Initial Mix Time
Pre-wet Mix Time
Dry Mix Time
Wet Mix Time
The Dry Weight parameter is the weight of all of the recipe ingredients, as weighed, in their dry
state. With aggregates this should be without free water (the weight at the SSD value). It
should include the weight of the cement in the mix. This is used as the basis of the calculation
mode.
The Cement Weight parameter is the quantity of cement added to the mix. This is used to
calculate the Water/Cement ratio in the mix log.
The Pre-wet Mix Time is the time the system will mix for after adding the pre-wet water, before
activating the Pre-wet Done output and moving to the next phase.
The Cement Timeout parameter defines how long the Hydro-Control will wait after sending the
Pre-wet Done signal for the batch control system to add the cement. If the Cement In signal
has not been received by the end of this time, then it will trigger the Cement Timeout Alarm.
The Initial Mix Time is the time period that the system will mix prior to the pre-wet water being
added. The Pre-wet Mix Time is the time period that the system will mix after the pre-wet water
has been added before issuing the pre-wet done signal. The Dry Mix Time is the time the
system will mix for after the pre-wet done signal (or cement In signal if used) is raised before
moving on to the main water addition. The Wet Mix Time is the time the system mixes for after
the main water addition before giving a mix complete signal.
If the auto-track feature is used then during operation these mix times are doubled and used as
maximum mix times for more information on using the auto-track feature see Chapter 5 System
Design section 4.4Auto-Track.
Units
kg/lbs
kg/lbs
Seconds
Seconds
Seconds
Seconds
Seconds
Hydro-Control VI Installation Guide HD0455 Rev 1.9.0
Commissioning
Default Range
0 0 – 32000 kg
0 – 70547 lbs
0 0 – 32000 kg
0 – 70547 lbs
0 0 – 999 s
0 0 – 999 s
0 0 – 999 s
0 0 – 999 s
0 0 – 999 s
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