YSI 6500 Environmental Process Monitor - Manual (Page 45)

Laboratory and Field Calibration Section 4
Now simply press the Enter key to return to the Calibration display and proceed to calibration of
the other sensors using the same basic procedures as described above for specific conductance.
4.3 6500 CALIBRATION WARNING AND ERROR MESSAGES
When you calibrate the 6-Series Sonde sensors with the 6500 Monitor, you may occasionally
encounter an error message display similar to those shown below when attempting to confirm a
calibration value. The examples below show two “alert” categories, a warning and an error.
Warning messages can be overridden, while error messages can not be overridden. Examples are
shown below.
If any of these messages occur, it is usually due to one of three causes: (1) a contaminated standard,
(2) improper implementation of the recommended calibration procedure (e.g., not immersing the
sonde completely in the standard), or (3) a malfunctioning sensor. If you encounter a warning or
error message, first begin the calibration procedure again. Be certain that the value you enter for the
calibration standard is correct, that your calibration standard has not been contaminated (use a new
standard if necessary), and that you have followed the suggested calibration procedure for each
sensor as outlined below.
If you still encounter a calibration error message, contact YSI-authorized service for advice. You
can “override” a calibration warning, but you should not do this unless you have additional
knowledge regarding the cause of the message. Also see Section 7, of the sonde manual for more
information on error messages and general troubleshooting.
After following the above instructions for laboratory or field calibration, your sonde is ready for
attachment to the 6500 Monitor and deployment in your stream. After installation is complete,
proceed to Section 5, Proper Use and Care of the 6500 Monitor System, for tips on system usage
and quality assurance procedures.
YSI Incorporated 6500 Environmental Process Monitor 42