Logging Functions (Gf Pf330 V2 Only) - GF PF220 V2 Betriebsanleitung

Operation of the device
8.3.5 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 and
prevent large fluctuations in the displayed flow value. It has a range of 0 to 50 s, with a default setting of 10s. The damping time is
defined as the time required for a step change in flow to reach 98.2% of its final value.
FLOW READING OPTION
Data review
Zero cutoff (m/s)
Set zero flow (m/s)
Damping (secs)
Totaliser
Reset + Total
Reset -Total
Calibration factor
Roughness factor
Diagnostics
Exit
DAMPING OPTIONS
1 second
10 seconds
15 seconds
20 seconds
30 seconds
50 seconds
NOTICE
If the damping factor is, set high the value displayed may appear stable but flow readings may
respond very slowly to large step changes. In this case, consider using dynamic damping.
8.4

Logging Functions (GF PF330 V2 only)

NOTICE
This chapter only applies to GF PF330 V2 and GF PF330 V2 HM models. GF PF220 V2 models do not have logging capabilities.
This is procedure shows you how to set up a basic logging session under manual start/stop control. Logged data is saved to the
instrument's memory and can be copied to a USB flash drive as a CSV (Comma Separated Values) file at a later time. Date, Time,
Flow Rate, Forward (+) and Reverse (-) totals, Velocity, Signal Q(quality), SNR and general signal status are logged automatically. If
the unit has a Heat meter fitted, the Hot, Cold and the Temperature difference values are logged in addition to instantaneous pow-
er, and a total energy figure. Logging writes to internal memory, which may then be copied to a USB flash drive at a later date.
38
DD-MM-YY HH:MM:SS
:
0.00
: 0.00
: 10
: Run
: 1.000
: 0.01
DD-MM-YY HH:MM:SS
1. From the Main menu, use the Up and Down scroll keys
to select Setup Instrument. Press the ENTER Key. With
System or Primary Flow selected in the Options menu,
press the
ENTER Key.
Alternatively, from a Read Flow/Velocity/Energy screen,
press the SYSTEM key (2). The System Settings menu is
displayed.
2. Use the UP/DOWN arrow keys to select Damping Time.
Press the ENTER key.
3. Enter the value of the Damping Time (0 - 50 s) as required
to remove any unwanted display fluctuations. Increasing
the value applies a greater smoothing affect.
4. Press the ENTER key to apply the selection. Not all values
of damping in the range are valid. The instrument will set
the damping time to the nearest valid time, which may not
be exactly as entered. Note that zero seconds is a totally
undamped response.
5. Select the desired Damping Mode. Fixed mode strictly
follows the damping period as initially described in this
paragraph. Dynamic mode switches off damping if the
magnitude of change in flow velocity exceeds a certain
predefined value. Once the change in velocity drops below
this threshold, damping time is reset to the value selected.
6. Return to the System menu.
7. Select Exit and press the ENTER key to return to the Main
menu.
Operating Instructions