10. Glossary
Rain Bird
®
ET Manager Series - Installation and Operation Manual
74
Enable A then B:
This Output Method operates the
same as the Enable method with one significant differ-
ence, where watering is allowed on only one valve
group per day. Watering on the other valve group will
be delayed until the following day.
ET:
An abbreviation for evapotranspiration (see evapo-
transpiration).
ET and Rain Pulse:
An Output Method that delivers ET
and rain data to a compatible sprinkler controller. A
dry contact switch closure represents 0.01 inches of ET.
The rain output signals 0.01 inches of rain with a dry
contact switch closure. Compatible sprinkler con-
trollers use this information to make watering schedul-
ing decisions.
ETc:
Evapotranspiration calculated to include land-
scape adjustments and crop coefficients.
ET Manager (Model ETMi):
An accessory to a sprin-
kler controller to automate watering schedules based
on real-time weather data ensuring watering occurs
only as needed.
ET Manager 120-volt AC Plug-in Transformer
635640 (Model ETMi-TRAN):
An optional ET
Manager power source is the plug-in transformer and
it draws power from a standard 120-volt AC outlet.
ET Manager Outdoor Enclosure (ETMi-OE):
ET
Manager outdoor enclosure option made of industrial
lockable fiberglass, a NEMA 4X cabinet with 110-volt
AC outlets.
ET Manager Programming Software (ETM-PS):
The
ET Manager Programming Software is a software pro-
gram that simplifies ET Manager programming. The
ETM-PS allows you to connect your ET Manager to a
personal computer to perform several key functions.
ET Manager Scheduler:
The Rain Bird ET Manager
Scheduler software program uses site specific informa-
tion to help you prepare a watering schedule that can
be programmed in your sprinkler controller. The ET
Manager Scheduler can also be used to help in deter-
mining initial settings for your ET Manager.
ET Manager Settings:
Your ET Manager operation
requires programming specific settings. Most of the
programmable settings are site specific.
ETMi:
Model number for the ET Manager controller
interface, for indoor use only.
ET Manager Remote Antenna Kit (ETMi–ANT):
If the
weather signal is regularly missed with the built-in
antenna, the ET Manager Remote Antenna Kit may be
connected and mounted in a location for better recep-
tion.
ET Pulse with Weather Interrupt:
An Output Method
that delivers ET to a compatible sprinkler controller
and interrupts watering during high winds, freezing
temperatures and rainfall. A dry contact switch closure
signal represents 0.01inches of ET. A second output
acts as a sensor interrupt to prevent watering if any one
of the three Weather Interrupt conditions occurs.
Compatible sprinkler controllers use this information
to make watering scheduling decisions.
Evapotranspiration or ET:
A measurement of the
water that evaporates from the soil and transpires from
a plant. ET represents the total moisture loss from the
root zone.
Exposure:
Environmental exposures, such as sun expo-
sure, high winds, or shade, can increase or decrease the
rate of evaporation. Exposure areas that would increase
the rate of evaporation may need longer station run
times, while exposure areas that would decrease the
rate of evaporation may be fine with shorter station run
times.
Historical ET:
The ET Manager can be set to operate
using historical ET data, instead of the weather signal
data. If a problem occurs and the ET Manager is not
receiving the weather signal, it will continue to operate
using historical ET data as a default ET. This setting
represents an average daily ET for each month.