YOKOGAWA Vigilant Plant EXA TB Series, Руководство пользователя

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<5. FUNCTIONS>
5-10
IM 12E04A02-02E
c. Sampling Time
After the Hold Time has elapsed, the turbidimeter gives readings without any processing for a
speci fi ed Sampling Time to verify that no fl uctuation occurs in turbidity readings.
The time count begins after the Hold Time. It is unlikely that air bubbles or dust occur
consecutively. Therefore, the Sampling Time may not need to be too short. If the Sampling Time
is set too short, the response is delayed when a sudden change in turbidity actually occurs. First
set the Sampling Time slightly longer. If something is wrong with the behavior of the function,
shorten the time. For the procedure for settings in <PROGRAM1> mode, refer to Section 6.6.
„ Instructions for Use
Be careful when using the function as the following restrictions apply.
(1) The function works only in <MEAS.> mode. As soon as the mode is changed, the Hold or
Sampling timer is reset and the function stops working.
(2) The function does not work during automatic zero calibration or automatic cleaning.
If automatic zero calibration or automatic cleaning begins when the function is active (i.e.,
during a Hold Time or Sampling Time period), the function immediately stops running and
the timer is reset.
(3) During a Hold Time period, both turbidity readings (including communication data) and
analog outputs are held.
(4) The function does not run for approximately 5 seconds right after the turbidimeter is turned
on.
(5) If the turbidimeter is turned off then on again while the function is running, the timer is reset.
(6) Since the reference clock runs at a period of approximately 1.07 seconds, the actual time
are slightly greater than their setpoints, respectively. For example, if the time is set to 10
seconds, the actual time will be: 10 x 1.07 = approximately 11 seconds.
3rd Edition : May. 31, 2010-00