GF PF220 V2 Betriebsanleitung Seite 31

Operating Instructions
Calculating the Average Flow or Power
To calculate the average flow, wait for the allotted monitoring period to expire then divide the indicated total volume or energy by
the time taken. This will give you the average flow in m/s, gals/hour or whatever units you select. Follow the same procedure for
average power, taking note of the issue below.
NOTICE
In a bi-directional flow situation you must calculate the difference between the indicated positive and negative flow totals before
carrying out the average flow rate calculation.
NOTICE
If flow is reversed, then normally energy might be considered reversed, however, as the systems under measurement do not
behave in this way, when flow is reversed, the power is set to zero, irrespective of the magnitude of flow. The period of flow
reversal would have to be taken into account if an average power is calculated.
Resetting Totals
System Settings
Back-light Timeout
Audible Keypress
Set Date & Time. .
Display Total
- >Reset Totals. .
Damping Mode
System Settings
Set Energy Total
- >Set Fwd Volume Total
Set Rev Volume Total
Reset Energy. .
Reset Volume. .
Exit
DD-MM-YY HH:MM:SS
60 sec
ON
Both
Fixed
DD-MM-YY HH:MM:SS
0 kJ
0 1
0 1
1. From the MAIN menu, use the Up and Down arrow keys
to select Setup Instrument. Press the ENTER Key. With
System 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. Select Reset Totals.. and press the ENTER key.
3. Enter the code 71360. The Reset Total screen is displayed.
4. Set the reset values for Energy Total, Fwd
Volume Total and Rev Volume Total as
required. The totals can be set to any value, but most
commonly the reset value will be zero.
5. Select Reset Energy or Reset Volume.
6. Select Yes to confirm the action
(or No to cancel).
7. If Yes was selected, the total will be reset and the word
"Done.." appears against the quantity that was reset.
8. Reset the remaining quantity (Energy or
Volume) if required.
9. Select Exit and press the ENTER key to return to the MAIN
menu.
Operation of the device
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