Baseline Systems BaseStation 1000 - Manual (Page 120)

BaseStation 1000 Irrigation Controller Manual
ET-based watering A watering methodology that uses the principles of evapotranspiration to
water when needed rather than on an established schedule
evaporation Loss of water as vapor from the soil surface or from moisture on the
surface of a leaf. Differs from transpiration in that the water does not
pass through the plant parts.
evapotranspiration
(ET)
The process of transferring moisture from the earth to the atmosphere
by evaporation of water and transpiration from plants.
field capacity This is the maximum water holding capacity of the soil, in other words,
the level of soil moisture left in the soil after drainage of the gravitational
water. Irrigation to levels above field capacity will result in runoff or
drainage as gravitational water.
flow device A device that is capable of measuring water flow and water used
GPH The abbreviation for gallons per hour
GPM The abbreviation for gallons per minute
hydrozone A grouping of plants that have similar water requirements and can be
watered the same
infiltration The process by which water passes through soil – the liquid permeates
the soil by passing through the pores in the soil
Intelligent Soak
Cycle™
When a zone waters using an Intelligent Soak Cycle, the total watering
run time includes periods of watering interspersed with periods of soak
times, or non-watering times. Baseline’s Intelligent Soak Cycles prioritize
runtimes for zones that have already started to water over zones that
have not started in order to maximize watering efficiency and minimize
total irrigation time.
K-value (also known as K-factor) A calibration factor for a flow device expressed
in pulses per unit volume. The K-value is used to calibrate the volumetric
throughput of a flow device. Manufacturers give the K-value (or K-factor)
of their flow device in the device specification.
lower limit When you set up a start or stop condition based on soil moisture sensor
readings, you can set the lower limit as the trigger for the condition.
Then, when the moisture level drops below this limit, the program will
start or stop.
master valve (MV) An automatic or manual valve installed at the supply point which
controls water flow into the system mainline piping. The BaseStation
1000 controller supports one master valve and can be upgraded to
support up to four. By default, all master valves are assumed to be
Normally Closed, unless they are specifically programmed to be Normally
Open.
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