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Alarm
Alarm
Item
No.
description
Concentration
71
lower limit
Concentration
72
device upper
limit
Concentration
73
device lower
limit
Water
temperat
ure
75
Zero calibration
76
Span calibration
Cause
Sample water abnormality
Connection failure in water
temperature sensor
connector
Water temperature sensor
failure
Internal analog circuit board
failure
Connection failure in water
temperature sensor
connector
Water temperature sensor
failure
Internal analog circuit board
failure
Connection failure in water
temperature sensor
connector
Water temperature sensor
failure
Internal analog circuit board
failure
Mismatched calibration
results
Mismatching calibration
temperature
Connection failure in water
temperature sensor
connector
Water temperature sensor
failure
Internal analog circuit board
failure
Mismatched calibration
results
Mismatching calibration
temperature
Connection failure in water
temperature sensor
connector
Water temperature sensor
failure
Internal analog circuit board
failure
Corrective action
(*: Manufacturer service required)
Check sample water temperature.
Inspect water temperature sensor
connection.*
Replace water temperature
sensor.*
Replace internal analog circuit
board (TW-ADC-01).*
Inspect water temperature sensor
connection.*
Replace water temperature
sensor.*
Replace internal analog circuit
board (TW-ADC-01).*
Inspect water temperature sensor
connection.*
Replace water temperature
sensor.*
Replace internal analog circuit
board (TW-ADC-01).*
Reset calibration value and
reexecute calibration.
Check calibration temperature and
reexecute calibration.
Inspect water temperature sensor
connection.*
Replace water temperature
sensor.*
Replace internal analog circuit
board (TW-ADC-01).*
Reset calibration value and
reexecute calibration.
Check calibration temperature and
reexecute calibration.
Inspect water temperature sensor
connection.*
Replace water temperature
sensor.*
Replace internal analog circuit
board (TW-ADC-01).*
8 TROUBLESHOOTING
Reference
page 73
page 73
161
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