Probe12 Sap Flow Logger - Irrigation Control

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Probe12 Sap Flow Logger - Irrigation Control

Probe12-IS Irrigation Scheduler is a stand alone water balance measurement system for irrigation automation based on plant transpiration. Twelve TDP Sap velocity sensors read crop water consumption. These measurements are compared to rainfall, soil moisture and irrigation water supplied. The water balance or water deficit then determines the amount of water to be replenished at a predetermined interval. The system informs the grower to manually apply a specific volume for the area intended, or the Probe12 may automatically open irrigation valves until the water balance is replenished.

The internal logger collects the sap flow rates, rainfall, and irrigation history retrieval by PC or remote radio link. Probe12 makes water-efficient crop management easy and precise.

Probe12-DL Datalogger is a stand alone water balance measurement system. Up to 12 TDP sap velocity sensors are recorded with all sensor signals, sap flow, and the weighted average for as many as twelve plants.

Optional sensors for rainfall, soil moisture or solar radiation are recorded at each logging interval. The Probe12-DL stores the irrigation and watering history for direct or remote retrieval. When a PC connects to the Probe12-DL, the detailed log of sensor results may be transferred to spreadsheet files for analysis.

Features

Based on Successful Flow4 technology
High performance irrigation and water balance logging
Real-time sensor status
Measures: Plant transpiration, rainfall, soil moisture
Monitors water applied to crop irrigation zones
12 TDP sensors - expert weighted averages
History data acessed easily by friendly menu software
Number of plants per field, plant size automatically factored
Irrigation adjusted for system inefficiency and evaporation
Communication interface to any Windows based PC

Specifications

US Patent No 7280892

Datalogger
Proprietary embedded microprocessor at 8MHz clock, 27 kb of Non-volatile data logger memory, 4 kb of history, water balance storage for upto 100 days, 28 kb program memory. Based on Dynamax’s Flow4 technology

Sensor Inputs

TDP sap velocity sensors
12 differential inputs: range ±2.5 mV, 0.1 uV res. 4 inputs: range 0-10 V, 1.0 mV resolution

Auxiliary sensor
range 0 - 2.5 V., 0.1 mV resolution

Rain gage
dry contact closure

Flow meter
dry contact or solid state 0-12 V

Irrigation Valve
24VAC, 60Hz / 50 Hz

Sensor Cables
Screw terminals with sensor type and channel label for TDP sensors. Quick connect external sensor inputs for Rain gage, Flow Meter, Auxiliary sensor and Irrigation valve

Control Output - Probe12-IS only
Valve control relay, 15 A @ 28 Vac maximum

Basic Communication
RS-232, 9,600 Baud, 15 ft. cable (5 m)

Optional Communications
RF Modems 900 MHz, upto 20 miles Short-haul Modems Upto 1.3 miles Point-to-Point, Point-to-multi-point configuration

AC Outlet Adapter
Switching regulator, 3.6 A @15 V dc; 120/240 Vac, 50-60 Hz., 6 ft extension (1.8 m)

Battery Power - Voltage Requirements
Sealed lead-acid, 12 V, 5 Ah. Working range 10-15 V. Absolute minimum - 6 V. to keep processor ON

System Current
50 mA without sensors maximum fuse current 3.15 A, 250V,
(5 x 20 mm)

Enclosure Dimensions
6.5" x 11.75" X 13.5" (16.5 x 30 x 34.3 cm)

Weight
15 lb (7 kg)

Ratings
NEMA 1, 2, 3 rain tight. CSA, UL listed