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20
Entering the Filter Parameters
BAND
% of FS is the maximum
percentage change in reading that
can occur before the filter directly
follows the changing pressure. This
parameter can be set between 0
and 10% FS.
TIME is the time constant of the
filter; when a small step change in
pressure is applied (less than the
band setting), it is the time to reach
approximately 63% of the final
value. The final value will be
reached in five time constants.
Example
With the TIME set to 2 seconds, the
display shows the full pressure value after 10 seconds.
Proceed as follows:
1.
Make sure the instrument is in measurement mode and
displaying pressure.
2.
Press SET twice and status line shows "MAX/MIN FILTER".
3.
Press F2 to select FILTER settings.
4.
Use F1
and F2
5.
Press SET when the display shows the required value.
6.
Repeat steps 4 and 5 to enter the TIME value. Pressing
SET returns the instrument to measurement mode with
the new filter settings stored and ready for use.
Note:The filter parameters are nonvolatile and remain stored
with the instrument switched off.
K0200 Issue No. 1
to set the BAND value.
DPI 740 User Manual
BAND = <value>%FS
F1
F2
SET
TIME = **
F1
F2
SET
** = value 0 to 99
»
Display returns to
pressure measurement
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