Geokon 6160, Руководство по установке

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4.3. Environmental Factors
Since the purpose of the inclinometer installation is to monitor site conditions, factors that may
affect these conditions should be observed and recorded. Seemingly minor effects may have a
real influence on the behavior of the structure being monitored and may give an early indication
of potential problems. Some of these factors include, but are not limited to: blasting, rainfall,
tidal or reservoir levels, excavation and fill levels and sequences, traffic, temperature and
barometric changes, changes in personnel, nearby construction activities, seasonal changes, etc.
5. TROUBLESHOOTING
Maintenance and troubleshooting of the MEMS sensors used in the Model 6160 and 6161
Tiltmeters are confined to periodic checks of cable connections. The sensors are sealed and there
are no user-serviceable parts.
Consult the following list of problems and possible solutions should difficulties arise. Consult
the factory for additional troubleshooting help.
Symptom: Tilt Sensor Readings are Unstable

Is there a source of electrical noise nearby? Most probable sources of electrical noise are
motors, generators and antennas. Make sure the shield drain wire is connected to ground
whether using a portable readout or datalogger.

Does the readout work with another tilt sensor? If not, the readout may have a low battery or
be malfunctioning.
Symptom: Tilt Sensor Fails to Read

Is the cable cut or crushed? This can be checked with an ohmmeter. The nominal resistance
of the thermistor is 3000 ohms at 25 degrees C. If the approximate temperature is known, the
resistance of the thermistor leads can be estimated and used as a cable check. Remember to
add cable resistance when checking (24 AWG stranded copper leads are approximately
25.7

/1000' or 84.5

/km, multiply by 2 for both directions). If the resistance reads infinite,
or very high (megohms), a cut wire must be suspected. If the resistance reads very low
(

20

) a short in the cable is likely.

Does the readout or datalogger work with another tilt sensor? If not, the readout or
datalogger may be malfunctioning.
Symptom: Thermistor resistance is too high.

Is there an open circuit? Check all connections, terminals and plugs.
Symptom: Thermistor resistance is too low.

Is there a short? Check all connections, terminals and plugs.
]

Water may have penetrated the interior of the tilt sensor. There is no remedial action.