horiba TW-150 Instruction Manual page 186

8 TROUBLESHOOTING
Alarm Alarm
Item
No. description
66 Span calibration
Conducti
vity
Analyzer
67
abnormality
Water
Concentration
70 temperat
upper limit
ure
160
Cause
Mismatched calibration
results
Mismatching calibration
solution
Connection failure in
conductivity sensor
connector
Conductivity sensor
expiration or failure
Internal analog circuit board
failure
Mismatched calibration
results
Dirt in conductivity sensor
Conductivity sensor
expiration or failure
Internal analog circuit board
failure
Sample water temperature
abnormality
Connection failure in water
temperature sensor
connector
Water temperature sensor
failure
Internal analog circuit board
failure
Corrective action
(*: Manufacturer service required)
Reset calibration value and
reexecute calibration.
Check calibration solution and
reexecute calibration.
Inspect conductivity sensor
connection.*
Replace electric-conductivity
sensor.
Replace internal analog circuit
board (TW-ADC-01).*
Perform calibration.
Clean conductivity sensor.
Replace electric-conductivity
sensor.
Replace internal analog circuit
board (TW-ADC-01).*
Check sample water temperature.
Inspect water temperature sensor
connection.*
Replace water temperature
sensor.*
Replace internal analog circuit
board (TW-ADC-01).*
Reference
page 53
page 138
page 144
page 53
page 144