Veris-technologies MSP3 - Operating Instructions Manuel d'utilisateur télécharger pdf (Page 7)

Pub. #OM17-MSP3

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Statement of Use

Intended use of the Veris MSP3 model

The Veris MSP3 Soil EC, Organic Matter, and pH Mapping System collects geo-referenced soil

electrical conductivity (EC), soil reflectance, and soil pH measurements as it is pulled across a field

by a tractor. An electronic device called the Soil EC Surveyor, powered by vehicle’s 12V DC

electrical system, generates a small electrical current, which is transferred into the soil through a

pair of rolling electrode coulter disks. A second pair of disks measures the drop in voltage which is

proportional to the electrical conductivity of soil medium at a given location. Signal response is due

primarily to soil texture/grain size and soil salinity. Clay soils and soils with high salinity levels are

highly conductive, while coarser soils such as sand do not conduct well. Another electronic device

called the OpticMapper controller, powered by vehicle’s 12V DC electrical system, sends power to

an optical sensor which has two wavelengths of LEDs and measures the amount of light reflected

off the soil surface with a photodiode. The optical sensor is mounted inside a standard row planter,

with two discs to cut a furrow in the soil and two depth gauge wheels to keep the sensor at

constant depth. Signal response is due to soil color, darker soils are generally higher in Organic

Matter; while lighter soils are lower in Organic Matter. A final electronic device called the pH

controller, powered by vehicle’s 12V DC electrical and hydraulic system, measures soil pH using

two electrodes. The pH controller cycles the pH sampling shoe into the soil, where a soil core is

collected and brought up and pressed against the electrodes for a measurement. Once a stable

reading is measured, the sampling shoe moves down to collect another soil segment, and the

electrodes are washed off. This process is repeated every 20-30 seconds, as long as the operator

keeps the system engaged, and ground speed is received. The sampling shoe is controlled by

hydraulic solenoids, while the wash jets are powered by two 150 psi pumps. The system records

the data either on its own datalogger, or on a data recording device such as a laptop computer.

Ultimately, the data are displayed in a map format, and variable applications of crop production

materials, such as seed, fertilizer and other inputs are variably applied to the zones delineated on

the maps. The MSP3 system is designed for use in a farm field, and has no dynamic movement

unless vehicle is pulling it, or operator is manually activating switches, so guarding around soil

engaging components is not needed and would interfere with field operations. Unit should not be

operated when people are present in the field, as coulter disks are sharp and automated

movement could cause injury if contact occurs.

Misuse of the Veris MSP3 model

Misuses of the MSP3 model include operation with people in area, and pulling the system at an

excessive speed. In field position, this could result in poor data collection and possible tractor

overturning at extremely high speeds and sharp turns. In raised position, the chance of

overturning is increased, as the center of gravity is higher, so care must be taken to keep speeds

under 15 km/hr, and less when turning.

Abnormal use of the Veris MSP3 model

Abnormal use of the MSP3 model includes using it as a cart for carrying equipment, tools, or

people. Under no circumstances should anyone ride on the implement. Even though the

implement is similar in appearance to a tillage tool, such as a disk harrow, it was not designed for

that usage and should never be used for any purpose other than soil data collection.

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Veris-technologies MSP3 - Operating Instructions Manuel d'utilisateur Page 7

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