Calculating the average flow, How to stop the totalizer temporarily, 2 display of totalizers – Dwyer Series PUF User Manual

Page 29: Starting point, Paragraph 3.6.3, Operating procedures

3: Operating Procedures

Calculating the average flow

To calculate the average flow, wait for the allotted monitoring period to expire then divide the indicated total flow
by the time taken. This will give you the average flow in m/s, galls/hour or whatever units you select.

Note that 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.

How to stop the totalizer temporarily

If you want to stop the totalizer temporarily for operational reasons, set the

Totalizer option to Stall in the

FLOW READING OPTIONS screen as described above. This will stop the totalizer operation without affecting its
current values.

3.6.2 Display of totalizers

Note: This menu selection only affects the Display of the totalizer. Unless the totalizers are stalled, the recorded
volume will still be incremented and the totals will be logged irrespective of the display setting.

3.6.3 How to set up the basic logging application to memory

This procedure shows you how to set up a basic logging session under manual start/stop control. The logged
data is saved to the instrument’s memory and can be downloaded to a PC at a later time.

Starting point

This procedure assumes that the PUF instrument has been correctly installed and is operating in the

FLOW

READING mode.

11. Scroll down and select

Exit to return to the

FLOW READING screen which will now indicate
the instantaneous flow together with the
totalized flow.
Note that in some installations the measured
flow can be in either direction. When this is the
case, the upstream flow is shown separately in
the

–Total field.

FLOW READING

DD-MM-YY HH:MM:SS

Qxx.xx%

Signal

gal/min

+Total: 300.0 gal

–Total: 0.00 gal

To change the display of the totalizers,
select the

Select Totals menu item from

the

FLOW READING OPTION menu.

The display of the totals on the

FLOW

READING screen is controlled by this menu.

Select one, both or no totals to be displayed.
The default is the display of

Both totalizers.

Press the ENTER key.

FLOW READING OPTION

DD-MM-YY HH:MM:SS

Off

Both

+Total

-Total

12.34