FlowKinetics FKS 1DP-PBM-E, Руководство пользователя

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FKS 1DP- PBM-E User Manual - Copyright © 2018 FlowKinetics

LLC, All Rights Reserved
10
called exponential smoothing) can be used (somewhat similar to a normal moving
average) and of the form:
2 ) 1 ( 1 2
*
P f f P P
  
(
Exp. Smoothing
)
where P2* is the new pressure estimate (shown on the display), P2 is the latest
pressure value measured from the transducer and P1 is the last pressure
estimate. In the PBM-E meter,
f is adjusted continuously (adaptive) depending on
the level of fluctuation of the measured pressure. If there is little fluctuation f will be
close to zero. If fluctuation is large,
f has a maximum value of 0.9. Thus f is
continuously adjusted by the meter (between 0 and 0.9) to provide the most stable
reading.
The second method that can be used is a simple averaging of readings
(
Average
). The meter will read the output from the pressure transducer
multiple times, and then average these values. The meter will continuously adjust
the number of averages (from 5 to 75 averages). This operation may be
noticeable, as the screen update rate may change as the meter changes (adapts)
the number of averages to give the best and most stable estimate of the pressure
or speed.
To select the method you want set the Range selector to Menu. The menu will
cycle through various functions. When
Smooth/Average
appears, rotate
(any direction) the Range control to select it. The menu will cycle,
Exp.
Smoothing
followed by
Averaging
. Rotate the Range selector (any
direction or unit) when the desired method is displayed. The instrument will then
return to measurement mode. The method you selected is stored in memory and
will be retained after switching the unit off. For very unstable readings, the
exponential smoothing may offer a more stable estimate, where the averaging will
offer a quicker estimate.
Measuring Pressure
Q: How Do I Change Units?
Units are changed by rotating the Range selector knob. The knob has no stop and
can rotate more than 360 degrees.
Q: How Do I Measure the Minimum (L) and Maximum (H) Reading
The Minimum and Maximum readings are continuously shown by the FKS meter
on the second line of the display. The maximum reading is preceded by H and the
minimum reading is preceded by L. No units are shown but correspond to the units
displayed on the first line.