Decagon Devices MAS-1 Manuale d'uso - Pagina 17

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6. Troubleshooting

If you encounter problems with the MAS-1, they will usu-

ally be caused by one of two situations

•

If the MAS-1 readings in air and/or water are outside the

ranges given in the Testing the Sensor section, then

there is likely a problem with the connection to the PLC

or other data acquisition system. Check the wiring and

check to make sure that the supply voltage is in the

specified range.

•

If the MAS-1 is reading a negative value for VWC

while it is inserted into the soil, make sure that you have

good sensor-to-soil contact. When inserted, the MAS-1

should be completely covered up past the black over-

molding. Removing and re-installing the full length of

the sensor with good sensor-to-soil contact should rem-

edy this problem.

If problems persist, contact Decagon for assistance.

MAS-1 Soil Moisture Sensor

6. Troubleshooting