Vaisala MAWS201 User's Guide download pdf (Page 149)

Chapter 5 _______________________________________________________________Maintenance

VAISALA _______________________________________________________________________ 147

QMT107

When the probe is extracted, clean the dirt accumulation on the

probe's surface with a soft cloth or sponge using water and mild

detergent. Field repairs are accomplished by replacing the complete

probe.

Soil Moisture Sensor

The ML2x probe is sealed after the factory calibration. It does not

require any routine maintenance and it is constructed of materials

selected for robust field operation. If the measurement rods become

bent in use, they can be carefully unscrewed from the body and

straightened. They have a right-handed thread. Please pay special

attention to the following points:

- Do not remove the cross-head sealing screws. This may damage the

seal and will invalidate your guarantee. No internal maintenance or

repair shall be performed by the user.

- Do not remove the probe from soil by pulling on the cable.

- Do not attempt to straighten the measurement rods while they are

still attached to the probe body. This may break the rods or damage

the case seal.

Water Level Sensors

QMV101/QMV102

To ensure reliable and accurate measurements, we recommend that

during each visit to the QMV101 Water Level Sensor the following

checks be made:

1. Check the drying detergent through the window of the junction

box.

2. If the drying detergent has turned red, change the cartridge. The

cartridge has reached its internal maximum absorption of

humidity. Replace the cartridge and adjust the interval for the

next visit.

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Vaisala MAWS201 User's Guide Page 149