Priva NUTRIJET - Technical Specifications - Process Computer

1)
In order to make a choice, dealers can consult the configuration tooling. The configuration ultimately supplied
and the associated most relevant specifications are summarised in the test report (“Product Delivery” form) that
is supplied with the unit. The manuals of the selected components are also supplied with the unit.
Technical specifications - process computer
The process computer is described in detail in the hardware and software manuals of the relevant
process computer. The table below only provides a summary of the aspects that are important for
the fertiliser dosing unit.
NutriJet with CompassNutriJet with Connext
CompassConnextProcess computer
fertiliser dosing unit is connected
to the I/Os of the process computer
fertiliser dosing unit is a substation
in the network of the process
computer
remotely via external process
computer
remotely via external process
computer
Operation
week with number of starts per day
(see software manual for other
options)
day or week (other options
depending on configuration, see
software manual)
Program cycle
equal to the number of set start
programs
equal to the number of set start
programs
Number of valve groups or valves to be
started independently of each other
1)
46Number of periods per 24-hour period in
which a start for a valve group or valve
1)
can
be defined
among other things time, radiation
level, radiation sum, external
control and manually (see software
manual for all options)
among other things time,
temperature, radiation level,
radiation sum, external control and
manually (see software manual for
all options)
Start based on
2)
duration, quantity of irrigation
water, external control, manually
and malfunction or alarm
duration, quantity of irrigation
water, external control, manually
and malfunction or alarm
Stop based on
2)
8depending on the selected
configuration (see software manual)
Number of recipes (a recipe includes, among
other things, the settings for the desired EC
and pH values)
no (if the option for selecting a
supply water source is not applied,
that option can be used with a small
adjustment of the internal wiring
for the selection of fertiliser tanks)
yesSelection of fertiliser tank (tanks A1, B1, C1,
etc. or tanks A2, B2, C2, etc.)
2)
noyes
Balance level control (with A+B principle)
2)
yes, maximum of 8 tanksyesSelection of supply water tanks or day
storage tanks
2
yesyesIrrigation water flow rate or volume
measurement
2)
no (there is a reaction to the change
via 'feedback' control, but it is
slower than via 'feed forward'
control)
yesDosage can anticipate a change in irrigation
water flow ('feed forward' control)
yesyesControl may take account of the number of
irrigation valves that may be open at the
same time
noyes, both volume and EC (and pH)
of several drain measurements
Drain measurement
2)
The actual moment of starting
(after the start program has been
launched) can be influenced based
on the drain quantity.
yesyesSupply water from different sources can be
mixed on the basis of EC or flow ratio
2)
45NutriJet - user - 00.002
Appendices