![Swann AMI Codes-II Operator'S Manual Download Page 67](http://html1.mh-extra.com/html/swann/ami-codes-ii/ami-codes-ii_operators-manual_1411948067.webp)
AMI Codes-II
Troubleshooting
A-96.250.571 / 050517
65
7.2.
Calibration Errors
7.2.1
Process calibration DIS
Possible error
message
Slope error:
7.2.2
Process pH
Possible error
message
Offset error:
7.2.3
Standard pH
Possible
error message
Offset error or Slope error:
Possible cause
Corrective Action
Wrong manual measure-
ment.
Repeat the manual measurement.
Use fresh reagents.
Wrong reagent mixture
Reagents not
completely solved in
water.
Make a correct mixture.
Mix long and intensively.
Possible cause
Corrective Action
Manual measurement
wrong.
Repeat the manual measurement.
Slope of last calibration
wrong.
Set default calibration values, see
Repeat the calibration
pH sensor dirty, old or
defect.
Clean or replace pH sensor, see
Maintenance of pH sensor, p. 58
.
Cable connector corroded.
Replace cable and sensor.
Possible cause
Corrective Action
Old, dirty or wrong buffer
solutions.
Check buffers expiration date if
necessary order new buffer.
Verify programmed buffer
values with the values of
the buffer solution used.
Change programmed buffer values
or use correct buffer solution.
pH sensor dirty, old or
defect.
Clean or replace pH sensor, see
Maintenance of pH sensor, p. 58
.
Cable connector corroded.
Replace cable and sensor.