XLINK 500/100 Operations & Maintenance Manual page # 136
14.
Errors
During operation, the system may notice errors. If it does, it will blink the red LED on the front
panel.
To see the error details, check the status with LinkComm. Via command line, type STATUS to see
any potential errors.
14.1.
Clearing Errors
Some errors can only be cleared by fixing the condition that is causing them. Most errors can be
cleared with LinkComm's Clear Status button on the main tab. On the command line, type
STATUS 0 to clear the errors.
14.2.
Measurement Errors
Measurement errors occur as the system collects sensor data. When data from the sensor
contains an error, that error is logged along with the sensor reading. The system notes this error
until the error is cleared. Even if the error were to occur only once, it remains in the system until
cleared.
14.2.1.
Sensor Failure
This error indicates a problem with a sensor or a setup. This error is recorded for SDI-12 sensors
when the SDI-12 sensor does not reply to the measure and to the data commands. It is also
recorded for analog measurements when the analog to digital converter indicates a problem
reading the input which could be to the input voltage being out of range or not being connected
(the system cannot always be able to tell if an analog sensor is present).
When the sensor failure error occurs, the system changes the sensor reading to match the user
set
Log Error Value,
which defaults to -99999. Such outlandish numbers are used to attract the
user’s attention when viewing the log.
14.2.2.
Meas Interval Too Short
If this error is present, then the measurement schedule is inappropriate.
This error means that the station missed a scheduled measurement. This gets logged when the
system realizes that more than one measurement interval has passed between two subsequent
measurements. One of the following likely took place:
The system missed a scheduled measurement (likely due to measurement taking longer
than
Meas Interval
to complete
–
e.g., system was told to measure every 5 seconds even
though the sensor takes 10 seconds to finish a reading
Equations
are enabled, and the
Meas Interval
is short (once a second or once every two
seconds). The system may take several seconds to compute a lengthy equation and
cannot complete a measurement as quickly.