30
SERVICE
Table 4 Troubleshooting the TEROS 54 (continued)
Problem Possible Solutions
TEROS 54 reading too high
Check to make sure that the media was not packed excessively or
insufficiently during probe installation. Higher density can cause
sensor reading to be elevated.
Ensure the calibration equation being used is appropriate for the
media type.
There are significant differences between calibrations, so be sure to
use the one most suitable to the substrate or consider developing a
substrate-specific calibration for the particular medium.
Some substrates have an inherently high dielectric permittivity (soils
of volcanic origin or high in titanium, for instance). If the substrate
has a dry dielectric permittivity above 6, a custom calibration may
need to be performed.
Cable or stereo plug
connector failure
If a stereo plug connector is damaged or needs to be replaced, contact
Customer Support for a replacement connector and splice kit.
If a cable is damaged follow the guidelines in the Wire Splicing and
Sealing Technique for Soil Moisture Sensors for wire splicing and
sealing techniques.
Data logger is not
recognizing probe
If using a METER logger, update logger firmware. Check the logger
configuration for a non-METER data logger using its user manual.
Data logger is not receiving
readings from the sensors
Check that the connections to the data logger are both correct and
secure. Ensure that data logger batteries are not dead or weakened.
Check configuration of the data logger through software to ensure
TEROS 54 is selected. Ensure the software and firmware is up to date.
High fluctuations of
thevalues
If there are high fluctuations in the values, this may be because the
TEROS 54 has larger gaps to the soil. This can cause air or water to
collect and falsify the values.
In such a case, check whether the TEROS 54 is firmly seated in the soil.
If the TEROS 54 sits too loosely in the soil, it must be removed and
reinstalled so that there is as little gap as possible between the
sensor shaft and the soil.
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