YSI 55 - Manual (Page 17)

13
SYMPTOM POSSIBLE CAUSE ACTION
9. Main display reads "Er 1"
or
Main display reads “Err”
(Secondary display reads “ra”)
A. Instrument's self-test detects a
variance in RAM
B. System requires service
A. Remove battery lid, wait 15 seconds
for reset, replace lid. (Page 3)
B. Return system for service (Page 14)
10. Main display reads "Er 2"
or
Main display reads “Err”
(Secondary display reads “ro”)
A. Instrument's self-test detects a
variance in ROM checksum
B. System requires service
A. Remove battery lid, wait 15 seconds
for reset, replace lid. (Page 3)
B. Return system for service (Page 14)
11. Main display reads "Er 3"
or
Main display reads "FAIL"
(secondary display reads “eep”)
A. Instrument's self-test detects a
system malfunction or component
failure
B. System requires service
A. Remove battery lid, wait 15 seconds
for reset, replace lid. (Page 3)
B. Return system for service (Page 14)
12. Main display reads "Er 4" A. Sample O
2
concentration is more
than 20 mg/L
B. System requires service
A. Recalibrate using correct altitude and
salinity compensation (Page 8).
B. Replace membrane and KCl (Page 6)
C. Clean anode (Page 7)
D. Clean cathode (Page 7)
E. Return system for service (Page 14)
13. Main display reads "Er 5" A. Displayed O
2
concentration is below
-0.5 mg/L.
B. System requires service
A. Recalibrate using correct altitude and
salinity compensation (Page 8).
B. Return system for service (Page 14)
14. Main display reads "Er 6" A. Sample O
2
concentration is over
range (% mode)
B. System requires service
A. Recalibrate using correct altitude and
salinity compensation (Page 8).
B. Replace membrane and KCl (Page 6)
C. Clean anode (Page 7)
D. Clean cathode (Page 7)
E. Return system for service (Page 14)
15. Main display reads "Er 7" A. Displayed O
2
concentration is below
-3.0%
B. System requires service
A. Recalibrate using correct altitude and
salinity compensation (Page 8).
B. Return system for service (Page 14)
16. Secondary display reads "Er 8"
or
Main Display reads “OVEr”
(Secondary display reads “ovr”)
A. Sample temperature is more than
+45.9 o C
B. System requires service
A. Reduce the sample temperature
B. Return system for service (Page 14)
17. Secondary display reads "Er 9"
or
Main Display reads “OVEr”
(Secondary display reads “udr”)
A. Sample temperature is less than
-5 o C
B. System requires service
A. Increase sample temperature.
B. Return system for service (Page 14)
18. Main display reads "Er A" A. Short in probe/cable assembly
B. System requires service
A. Replace probe/cable assembly
B. Return system for service (Page 14)