Hydronix Hydro-Control VI, Installation Manual

Page: 49 / 104

Chapter 4 Commissioning
Hydro-Control VI Installation Guide HD0455 Rev 1.9.0 49
Material addition/Mixing Times
Parameter Units Default Range
Dry Weight kg/lbs 0 0 – 32000 kg
0 – 70547 lbs
Cement Weight kg/lbs 0 0 – 32000 kg
0 – 70547 lbs
Cement Timeout Seconds 0 0 – 999 s
Initial Mix Time Seconds 0 0 – 999 s
Pre-wet Mix Time Seconds 0 0 – 999 s
Dry Mix Time Seconds 0 0 – 999 s
Wet Mix Time Seconds 0 0 – 999 s
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.