Irritrol PCW Control - Manual (Page 29)

PCW Control S Installation
27
ET Adjustment*
The Advisor ET Adjustment (Figure A2.3) allows the user
to adjust the watering recommendations provided by the
scheduling advisor. The ET adjustment is NOT a simple
multiplication of the runtime. Instead, the adjustment
changes the ET value used to create the watering sugges-
tions so a change of 10% in the adjustment might reflect
the advisor suggesting an increase of 20% to your runtime,
not a 10% increase.
If the Global Seasonal Adjustment is not at 100% the
Advisor will inform the user so that they can make more
accurate decisions when adjusting the ET value.
*(NOT compatible with Scheduling Advisor)
Working with Different Adjustments:
The user can affect the runtimes in various ways using
the different adjustment settings. In the example
below, each zone has a single watering event set
to run for ten minutes, and the global seasonal
adjustment set to 100%.
By changing the Schedule Seasonal Adjustment to
120% (Figure A2.4) the new runtimes for the stations
are twelve minutes.
Notice, that zone five is set to 115% for the Zone
Seasonal Adjustment. When viewing the schedule
zone five has a runtime of seventeen minutes, whereas
all the other stations have a twelve minute runtime
(Figure A2.5). This is consistent with the multiple
seasonal adjustments interacting with each other.
Figure A2.3
Figure A2.4
Figure A2.5