Hach LXV322.99.00002, Руководство по устранению неисправностей

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A: For DS calibration curves, setting the point to zero is the only way of removing it from the
calibration curve. If you intent to delete stored data for all calibration curves please enter code
379 in the system menu.
Q: How does the RESET function work under CALIBRATION?
A:
The RESET function is used to reset changes in the C-TU curve. To return the C-TU curve to
default the calibration points will also need to be set to zero.
Q: What are the default calibration points for turbidity entered into the meter?
A: Default calibration is factory set after an individual calibration of the probe. There are no
fixed FNU values as the calibration standards may vary slightly depending on the stock solution
used in manufacturing. They are in the range of : < 0.1 FNU; 400 FNU; 2000 FNU
Q: Is there a factory default calibration for suspended solid DS curves?
A:
The factory DS calibration is based on the probe response of a single point at 4 g/L, obtained
from a comprehensive analysis of many different sludge types. It is a kind of mean value that fits
many types of sludge. A user calibration is recommended for accuracy.
Q: What could be the cause of the error messages: Calibration insufficient - or Calibration insufficient
+?
A: errors “calibration insufficient -” means: Further calibration point with lower concentration is
missing in order to receive good results.
error “Calibration insuff” means: Further calibration point with greater concentration is
missing in order to receive good results.
Q: How do the errors “calibration insuff” and “overflow area” differ in how they are
generated?
A:
Error: “overflow area” designates that a probe is measuring in an unsuitable medium – It may
be necessary to recalibrate. This error accurse when the sludge concentration is at the upper
end of the measurement range and almost no light is reflected back to the sensors detector.
Setting up a new calibration curve is recommended. If the problem continues, the sludge
concentration is too high to be measured with the TSS portable probe; the value is beyond the
probes measurement range.