Swan Analytical Instruments AMI Codes-II CC Operator's Manual page 70

AMI Codes-II CC
Troubleshooting
7.2.
7.2.1
Possible error
message
7.2.2
Possible error
message
7.2.3
Possible
error message
70
Calibration Errors
Process calibration tc or fc
Slope error:
Possible cause
Wrong manual
measurement.
 Wrong reagent mixture
 Reagents not completely
solved in water.
Process pH
Offset error:
Possible cause
Manual measurement
wrong.
Slope of last calibration
wrong.
pH sensor dirty, old or
defect.
Cable connector corroded.
Standard pH
Offset error or Slope error:
Possible cause
Old, dirty or wrong buffer
solutions.
Verify programmed buffer
values with the values of
the buffer solution used.
pH sensor dirty, old or
defect.
Cable connector corroded.
Corrective Action
Repeat the manual measurement.
Use fresh reagents.
 Make a correct mixture.
 Mix long and intensively.
Corrective Action
Repeat the manual measurement.
Set default calibration values, see
5.4.2, p. 104
Repeat the calibration
Clean or replace pH sensor, see
Maintenance of pH sensor, p.
Replace cable and sensor.
Corrective Action
Check buffers expiration date if
necessary order new buffer.
Change programmed buffer values
or use correct buffer solution.
Clean or replace pH sensor, see
Maintenance of pH sensor, p.
Replace cable and sensor.
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