Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 125
13.
Errors
During operation, X-Link may notice system 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.
13.1.
Clearing Errors
Some errors can only be cleared by fixing the condition that is causing them. For
example ‘Time Not Set’ can only be fixed by setting the time.
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.
13.2.
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 system is rebooted or until the error is
cleared. Even if the error were to occur only once, it remains in the system until
cleared or rebooted.
13.2.1.
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 (X-Link cannot always be
able to tell if an analog sensor is present).
When the sensor failure error occurs, X-Link 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.
13.2.2.
Meas Interval Too Short
If this error is present, then the measurement schedule is inappropriate.
This error means that X-Link 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: