26
Units:
The ET System can display settings in either inches or millime-
ters. Use the arrow key to advance to the UNITS setting, and use the
+/- keys to change the units between INCHES and METRIC.
ET Adjust:
This setting adjusts the percentage of monitored ET that
will be used in irrigation calculations. The default setting is 80%,
which seems to fit most landscape applications. However, the adjust-
ment factor can be changed from 10 to 150% in 1% increments to
tweak the irrigation calculation for individual climates.
Use the arrow keys to move to the ET Adjust position, and press +/- to
change the setting up or down.
The adjustment is applied equally to all stations, which are further
modified by their individual settings (Plant, Site Info, and Sprinkler
types). This factor may compensate for non-ideal mounting condi-
tions, where sensor cannot be placed according to ideal specifica-
tions.
Hunter recommends observing performance carefully over the first
weeks of operation and adjusting the percentage only as a last resort
to tweak system performance.
ET Source:
Normally this is set to SENSOR, meaning the ET Sen-
sor station to which the ET Module is connected, and this is how ET
System was designed to operate.
It is also possible to set ET Source to MANUAL, allowing the user to
enter an ET value manually. This could be done to manually override
the Sensor for some reason, or to provide irrigation when the Sensor
is not physically connected.
To enter a Manual ET, use the arrow keys to move to the ET Source
setting, and use the +/- keys to change the display to MANUAL.
An ET value for the day will appear in the display. Use the +/- keys to
enter an ET in .01 in/.25mm increments.
When the dial is turned to the Automatic position, the display will
show the time/date, and then MANUAL ET: followed by the manually
entered value.
If ET SOURCE is set to MANUAL, it will remain the same every day
unless it is manually updated again.
Normal settings for proper ET operation are ENABLE ET: YES and ET
SOURCE: SENSOR. Do not change these except in unusual circum-
stances (such as Winter shutdown, or a disconnected Sensor).
This value will accrue each day, just like sensor-based ET. If the sys-
tem is not set to every day watering, the Manual amount will be added
each day between watering days. On the next watering day the total
accrual will be replenished.
Automatic
For normal operations, the dial is returned to the Automatic position.
ET System will not irrigate unless the dial is in AUTOMATIC!
When the dial is in the Automatic position, the display should normally
show the time, date, and current ET reading from the Sensor.
3:00PM 15MAR06
DAILY ET: 0.07 IN
The Daily ET shows the last 24 hour total ET. The ET may fluctuate up
and down, since every hour the oldest hour is dropping off, and the
latest hour is added. This figure is a rolling 24 hour total and if today
is cooler or cloudier than yesterday, the ET may actually decrease. The
total ET since last watering is tracked by the ET Module, and will be
used in the final watering calculation. The daily ET is only informa-
tional, for recent conditions.
If ET has been set to ET ENABLE: NO, the display will show OFF (to
change, go the ET SETUP dial position).
OFF
3:00PM 15MAR06
DAILY ET: 0.07 IN
(ET DISABLED)
Summary of Contents for ET System
Page 4: ...D 2 A B C E ...
