Rion KS-19F, Инструкция по эксплуатации, Страница: 46 / 62

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Function for cancelling erroneous count
Function for cancelling erroneous count
This function is for canceling erroneous count caused by noise or other fac-
tors and indicated by count values that are clearly different from the normal
particle count. If such a count occurs during periodic measurement in auto-
matic measurement mode, the value is replaced by data from the immediately
preceding measurement or the moving average value up to the preceding
measurement.
The result of cancelling erroneous count is not shown on the display screen of
connected KE-40B1 but is refl ected in the data stored on CF card and output
to the printer, serial interface, and D/A converter interface (factory option).
For details on setting periodic measurement, see the instruction manual of
KE-40B1.
Note
When the function for cancelling erroneous count is
valid, the averaging measurement is not carried out.
Erroneous counts in particle sensors
Particle sensors using a high-output laser have a tendency to occasionally
produce erroneous counts caused by temporary instability of light output due
to changes in environmental temperature, return of the emitted light beam to
the source (optical feedback), and other indeterminate factors.
Several tens to several thousands of such erroneous counts tend to occur over
a very short period, but it has been verifi ed that they return to the normal
condition within a few minutes.