YSI 6500 Environmental Process Monitor - Manual (Page 58)

Troubleshooting Section 6
unique address. A conflicting address will cause the described communication errors between the
6500 monitor and the conflicting sondes. This problem is characterized by repeated alarm sounds
and loss of 6500 Monitor functionality. If this error condition occurs, disconnect all sondes from
the 6500 Monitor and proceed as outlined below.
It is possible to remedy this problem by changing a conflicting SDI-12 addresss. Connect a
single sonde to the 6500 Monitor and change the SDI-12 address by using the “Change sonde
address” option in the Main menu (please refer to section 3.3.6).
It is recommended that you begin SDI-12 addressing at address 0 and increment for each
additional sonde that is connected. This will ensure that no conflicting addresses exist. Once the
desired address is chosen, press Enter to select it. The sonde has now been given a new SDI-12
address. Disconnect the re-addressed sonde and connect the second sonde. Repeat the address
change process, ensuring that a unique address is assigned each time. Once all your sondes are
re-addressed, you can reconnect them all and proceed with your setup.
Also, be sure that any future sondes connected to the 6500 monitor are assigned a unique SDI-12
address before including them in a multi-sonde configuration.
6.2 6500 MENU CHOICE PROBLEMS
Symptom: After plugging in the 6-Series sonde, sensor values appear on
the 6500 display, but the default selections are not those desired.
Possible Cause and Suggested Action: The proper sensors and parameters have not been configured
properly in the sonde software. Press the Esc and Enter keys simultaneously for 1 second to enter the
6500 Main menu. Use the “Sensor” and “Report” selections to configure your displayed parameters
as described in Section 3, System Setup, of this manual. Use the “Display” selection to configure the
character size of your display as described in Section 3. When the desired selections have been
completed, press Esc from the Main menu to return to the Run display.
Symptom: After pressing the Cal key from the Run display, the
parameter you desire to calibrate is “shaded out” and cannot be
highlighted with the up and down arrow keys.
Possible Cause and Suggested Action: User-calibration of this parameter has not been activated.
With supervisory permission, the calibration can be enabled from the Main menu. Press the Esc
and Enter keys simultaneously for 1 second to enter the 6500 Main menu. Highlight the
“Calibrate setup” selection and then the “Calibrations enabled” selection. Finally, highlight the
parameter you desire to calibrate and use the Enter key to toggle on the ability to calibrate. If the
calibration is activated, a check mark will appear in the box next to the parameter. Press Esc
repeatedly to return to the Run display and proceed with the calibration.
NOTE: Temperature can not be calibrated and will remain shaded on the 6500 display screen.
YSI Incorporated 6500 Environmental Process Monitor 55