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Table of Contents
Related Manuals for METER MAS-1
Summary of Contents for METER MAS-1
- Page 1 MAS-1...
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Page 2: Table Of Contents
13678-07 9.2023 TABLE OF CONTENTS 1. Introduction ....................1 2. Operation ....................2 2.1 Installation ....................2 2.2 Removal ..................... 3 2.3 Connecting ....................3 2.3.1 Conventional (PLC) ................4 2.3.2 Nonconventional ................5 2.3.3 Testing the Sensor ................6 3. -
Page 4: Introduction
Thank you for choosing the MAS-1 Soil Moisure Sensor from METER Group. This innovative sensor monitors soil moisture accurately with a standard 2-wire, 4- to 20-mA analog interface for use with many data acquisition and control systems. The MAS-1 cannot be used with the standard METER data loggers. -
Page 5: Operation
OPERATION 2. OPERATION Please read all instructions before operating the MAS-1 to ensure it performs to its full potential. PRECAUTIONS METER sensors are built to the highest standards, but misuse, improper protection, or improper installation may damage the sensor and possibly void the manufacturer’s warranty. -
Page 6: Removal
Figure 2 4-20 mA current loop diagram The MAS-1 will operate with a power supply from 12 to 32 V. It will perform best when powered with a square power curve. If the rise time to reach the supply voltage is too long, the MAS-1 can experience measurement processing problems. -
Page 7: Conventional (Plc)
12 to 32 VDC. The black wire is connected to an input terminal that accepts a current input ranging from 4 to 20 mA. For the MAS-1 to function properly, the voltage drop from the red to the black lead must be 12 V or greater. -
Page 8: Nonconventional
Volt It should have a voltage rating higher than the largest supply voltage. Be sure to observe correct polarity. The MAS-1 requires a voltage of at least 12 V. This limits the value of R Volt since part of the total voltage drop will be across the resistor. -
Page 9: Testing The Sensor
The signal is not affected by electrical resistance in the cable, so the sensor output is not affected by cable length or wire gauge. The MAS-1 requires only two conductors, so long lines are both lower in noise and less expensive. -
Page 10: System
MAS-1 3. SYSTEM This section describes the MAS-1 Soil Moisture Sensor. 3.1 SPECIFICATIONS MEASUREMENT SPECIFICATIONS Volumetric Water Content (VWC) Range 0−0.57 m , calibration dependent (0–100% VWC possible with custom calibration) Resolution Depends on current data acquisition device Accuracy 6% VWC with generic calibration for supported growing media up... - Page 11 SYSTEM Operating Temperature Range Minimum –40 °C Typical Maximum 60 °C NOTE: Sensors may be used at higher temperatures under certain conditions; contact Customer Support for assistance. Cable Length 5 m (standard) 40 m (maximum custom cable length) NOTE: Contact Customer Support if a nonstandard cable length is needed or if cables longer than 40 m are desired.
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Page 12: Components
The transmitted 4- to 20-mA current can be converted to the water content of the soil using a simple calibration function. The MAS-1 is designed to be used with standard 4-to 20-mA controllers and monitoring systems. It cannot be used with METER data loggers. -
Page 13: Service
6% VWC as long as the electrical conductivity of the medium is less than 8 dS/m. If the MAS-1 needs to be used in an unlisted medium, the application requires a more than 6% accuracy, or the material has high salinity, contact... -
Page 14: Troubleshooting
Check the wiring and make sure that the supply voltage is in the expected ranges specified range. Ensure good sensor-to-soil contact. When inserted, the MAS-1 Readings are negative should be completely covered up past the black sensor body. while in soil Removing and reinstalling should remedy this problem. -
Page 15: Terms And Conditions
NOTE: For products purchased through a distributor, please contact the distributor directly for assistance. 4.4 TERMS AND CONDITIONS By using METER instruments and documentation, you agree to abide by the METER Group, Inc. Terms and Conditions. Please refer to metergroup.com/terms-conditions... -
Page 16: Index
MAS-1 INDEX accuracy 7 phone number 11 cable length 8 range 7 calibration 10 rise time 3 compliance 8 connector types 8 customer support 11 specifications 7–8 communication 7 data logger compatibility 8 email address 11 measurement specifications 7 physical 7... - Page 17 14566-07 9.2023 METER Group, Inc. 2365 NE Hopkins Court Pullman, WA 99163 T: +1.509.332.2756 F: +1.509.332.5158 E: info@metergroup.com W: metergroup.com METER Group AG Mettlacher Straße 8, 81379 München T: +49 89 1266520 F: +49 89 12665220 E: info.europe@metergroup.com W: metergroup.de...
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