YSI 63 - Manual (Page 29)

25
Symptom Possible Cause Action
10. Conductivity/Salinity Display
reads “OVEr”
•
When calibrating: User cell constant
cal K is >5.25
•
When measuring: Conductivity
reading is >200 mS
•
Salinity reading is >80 ppt
•
Recalibrate with known good
standards (pg 11)
•
Clean conductivity cell (pg 21)
•
Return system for service (pg 29)
11. pH Display reads “undr”
•
When calibrating, pH level is under
range allowed for the buffer value
selected.
•
When measuring, pH level is < 0
•
Recalibrate with known good
standards (pg 6)
•
Clean pH sensor (pg 20)
•
Replace pH sensor (pg 4, 33)
•
Return system for service (pg 29)
12. Conductivity Display reads “undr”
•
User cell constant cal K is <4.9
•
Recalibrate with known good
standards (pg 11)
•
Clean conductivity cell (pg 21)
•
Return system for service (pg 29)
13. Main Display reads “OVEr”
(Secondary display reads “ovr”)
•
Temperature reading is >75°C
•
Measure samples at a temperature
within the range of the system.
14. Main Display reads “undr”
(Secondary display reads “udr”)
•
Temperature reading is <-5°C
•
Measure samples at a temperature
within the range of the system.
15. Main display reads “PErr”
•
User cell constant cal K is 0.0
•
Incorrect sequence of keystrokes.
•
See “Advanced Setup” chapter (pg 18)
•
Refer to manual section for step by
step instruction for the function you
are attempting.
16. Main display reads “LErr”
•
In temperature compensated
conductivity mode, temperature
exceeds the values computed using
user defined temperature coefficient
and/or reference temperature.
•
In cell constant cal mode,
temperature exceeds the values
computed using user defined
temperature coefficient and/or
reference temperature.
•
Adjust user defined temperature
coefficient or reference temperature.
(pg 18)
17. Main display reads “Err”
(Secondary display reads “ra”)
•
System has failed its RAM test
check procedure.
•
Turn instrument OFF and back ON
again.
•
Return the system for service (pg 29)
18. Main display reads “Err”
(Secondary display reads “ro”)
•
System has failed its ROM test
check procedure.
•
Turn instrument OFF and back ON
again.
•
Return the system for service (pg 29)
19. Main display reads “FAIL”
(Secondary display reads “eep”)
•
EEPROM has failed to respond in
time.
•
Return the system for service (pg 29)
20. Readings on main display don’t
change
•
Meter is in recall mode.
•
Press MODE key to return to Normal
Operation (pg 5, 12)