YSI 556 MPS - Manual (Page 109)

Section 13 Troubleshooting
YSI Incorporated YSI 556 MPS Page 103
PROBLEM POSSIBLE SOLUTIONS
Optional Cigarette Lighten Charger
Power cord fuse blown.
1. Unscrew adapter’s cap, remove tip and pull out fuse.
2. Replace fuse with a new 2-amp fast-blow fuse from an
electronics store such as Radio Shack.
3. Reassemble the adapter and securely screw the cap back
onto the adapter body.
File Problems
Upload of files from YSI 556
MPS to PC fails
1. Make sure that cable is connected properly to both 556
and PC.
2. Make certain that the proper Comm port is selected in
EcoWatch for Windows.
Barometer data is not stored
with sensor data file. Make sure Store barometer is active in the 556 Logging
setup menu.
Site Descriptions in the Site
List are “grayed-out” and not
available for appending files
with additional data. There is a parameter mismatch between the current 556
setup and that initially used. Change the current logging and
sensor setup to match the setup that was initially used to
create the file.
Sensor Problems
Sensor not properly calibrated. Follow DO cal procedures.
Membrane not properly installed or may be punctured.
Replace membrane cap.
DO sensor electrodes require cleaning. Follow DO cleaning
procedure. Use 5511 Maintenance kit.
Water in sensor connector. Dry connector; reinstall sensor.
Algae or other contaminant clinging to DO sensor. Rinse DO
sensor with clean water.
Barometric pressure entry is incorrect. Repeat DO cal
procedure.
Calibrated at extreme temperature. Recalibrate at (or near)
sample temperature.
DO sensor has been damaged. Replace sensor. Dissolved Oxygen
reading is
unstable or
inaccurate. Out of Range
message appears during
calibration.
Internal failure. Return probe module for service.