Xylem 6-Series Multiparameter - Manual (Page 284)

Troubleshooting Section 6
YSI Incorporated Environmental Monitoring Systems Operations Manual 6- 2
6.2 SONDE COMMUNICATION PROBLEMS
SYMPTOM
POSSIBLE CAUSE ACTION REF
Cannot communicate
with sonde Sonde not powered Check 12 vdc source 2.3.3
Cable connection is loose Check both ends of cable; secure
connectors 2.3.4
Damaged connectors Check pins at both ends; insure
they are straight, dry and clean.
Com port not selected Change to other com port, other
peripheral on the same port
(Internal mouse). Try other PC,
650 display/logger or dumb
terminal 2.4.3
Scrambled data Unmatched baud rate between
host and sonde Match the baud rate 2.4.3
Host is too slow Use faster computer
Interface cable failure Check cable for damage. If
necessary, return for service 2.3.4
Internal failure Return sonde for service 9