GF PORTAFLOW 330, Инструкция по эксплуатации

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Instrction manual Operating Procedures
29
7.5.5 Adjusting the damping factor
By averaging-out the flow rate over several seconds, the Damping factor can be used to
smooth out rapid changes in flow rate to prevent wild fluctuations in the displayed flow value.
It has a range of 1, 10, 15, 20, 30, 50 seconds, with a default setting of 10.
With the system running in FLOW READING mode:
1. Press the Options key to access the FLOW
READING OPTION screen shown.
2. Scroll down and select Damping (secs).
3. This will open the DAMPING OPTIONS screen.
4.
Select the value of the Damping factor as
required to remove any unwanted display
fluctuations. Increasing the value applies a
greater smoothing affect.
5. Press the ENTER key to apply the selection
and return to the FLOW READING OPTIONS
screen.
If the damping factor is set too high the value displayed may appear stable but it may exhibit
large step changes when the value is updated.
7.6 Performing Monitoring & Logging Functions
This procedure shows you how to set up a basic logging session under manual start/stop
control.
The flow rate and both +ve and -ve totals are logged by the instrument and downloaded to the
USB memory key. The Totals can be selectively displayed in the View Log as Text screen.
7.6.1 How to measure totalised flows (manually)
The basic measurement indicated on the FLOW READING screen is the instantaneous flow
rate, which in some applications may vary over a period of time. Average flow rates are
therefore often required in order to get a better understanding of an application’s true
performance. This is simply achieved by noting the total flow over a specific period (for
example 30-60 minutes) and then calculating the average flow rate over that period of time.
NOTICE