Swan Analytical Instruments A-85.119.010, Руководство пользователя

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6 - Maintenance - Repair
Calibration
During Trides calibration
“No sample
flow or
Reasons for getting the error message:
current value
too lo
w”
Sample
flow low Low sample flow
resulting in no signal
difference to zero. Check rpm on main dis-
play.
Process
value
too low ppm-value is too low
to provide enough
current difference
from the calibrated
zero current. Process value used for
calibration should be
above 0.15 ppm.
pH too
high The higher the pH,
the lower the current
available for calibra-
tion. Process value for calibra-
tion should be higher than
0.5 ppm if pH is > 8.
Zero too
high
Last zero calibration
is too high for the
detection limit to be
achieved. Redo zero calibration
after min. 48 hours of
uninterrupted operation.
Strictly observe proce-
dures in section
6.5, 49 .
Contam-
inated
sensor Sensor does not
provide enough cur-
rent for the value
measured with the
DPD method. Clean sensor, see 41 .
In case of repeated sen-
sor contamination, check
for copper tubes and/or
water treatment chemi-
cals such as cyanuric acid
and corrosion inhibitors.
If calibration is still not possible, contact support@swan.ch ,
indicating
Š
current diagnostic values,
Š
date and values of zero and slope of the last
three calibrations,
Š
sample pH,
Š
pH diagnostics values 2.2.2.x (if on-line pH-compensation
is installed).
AMI Trides Operator’s Manual, A-96.250.101
55