Baseline Systems BaseStation 1000 - Manual (Page 121)

BaseStation 1000 Irrigation Controller Manual
maximum
allowed
depletion
(MAD)
When the soil moisture content reaches this level, irrigation needs to start.
In most cases, the maximum allowed depletion level is just before the plants
begin to show visible signs of stress.
microclimate The climate of a specific location within a landscape. Variations in climate
are influenced by subtle differences in temperature, humidity, and wind
exposure. Microclimates can have a significant impact on plant water needs.
NCMV Normally closed master valve – built in to the BL-5402NCMV flow device
NOMV Normally open master valve – built in to the BL-5402NOMV flow device. It
can monitor high flow and shut down independently from the controller.
offset value A calibration factor for a flow device that compensates for limitations in the
device’s ability to measure small signals adequately. Manufacturers give the
maximum amount of offset associated with their flow device in the device
specification
permanent
wilting point
When soil moisture content reaches this level, plants can no longer get
water from the soil, and they will wilt and die
powered
biCoder
A decoder device that interprets the signals that it receives from the
controller and tells the valve to turn on or off. A powered biCoder is
designed to retrofit into existing systems and requires 120 VAC service at
installation location.
program The controller uses a program to organize watering events. Each program
can have different schedules, water days, start/stop/pause conditions, and
associated devices. The BaseStation 1000 supports 20 programs and can be
upgraded to support up to 40.
pump start A relay or relay-type device that initiates turn on of a pump, typically a high
horsepower electrical or motor driven pump
runoff When the soil moisture content is at the saturation level, any excess water
from rain, snow melt, or irrigation drains to a low point in the landscape
saturation When the soil moisture content is at this level, nearly all of the spaces
between soil particles are filled with water. After a soil has reached
saturation, it does not become more saturated; although, in some situations
where water is trapped, it can become flooded.
soak cycle When a zone waters using a soak cycle, the total watering run time includes
periods of watering (run times) interspersed with periods of non-watering
times (soak times).
soil-moisture
content
The ratio of the volume of contained water in a soil compared with the
entire soil volume
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