Dwyer Series PUF - Manual (Page 24)

3: Operating Procedures
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3.4.2 Changing a site name
To change a site name, use the same method described above for generating a new site: but in this case access
a current site name to change rather than an EmptySite. If you change a site name while the site is logging, the
logging will stop.
3.5 Instrument Calibration
The PUF is fully calibrated before it leaves the factory; however the following adjustments are provided to allow
you to further ‘fine tune’ your instrument to suit local conditions and application where necessary. Apart from the
zero flow offset adjustment, these are normally carried out only where the instrument is to be used in a permanent
or semi-permanent location.
3.5.1 Adjusting the zero cut-off
This adjustment allows you to set a minimum flow rate (m/s) below which the instrument will indicate ‘0’. The
default setting is 0.1 m/s (0.33 ft/s) but you may adjust this value if required.
1. With the instrument operating in FLOW READING mode, press the Options key to access the FLOW
READING OPTIONS menu shown.
8. Scroll down through the menu list and enter/
change the pipe parameters and other data
pertaining to the site.
Note that this menu allows you to choose a
Sensor Set, unlike the QUICK START menu
which recommended the sensor set to use. If
you enter an inappropriate sensor set in this
menu, you will be presented with an error
message later when you go to the
SENSOR
SEPARATION screen.
VIEW EDIT SITE DATA DD-MM-YY HH:MM:SS
Choose from list of sites
Site name : MyNewSite
Dimensions : Inches
Pipe outside diameter: 0.00
Pipe wall thickness : 0.00
Pipe lining thickness: 0.00
9. When all the data is correct you can either:
a) Select Save current site & read
flow to continue fitting the transducers
and opening the
FLOW READING screen.
b) Select Delete this site to delete the
site name and values and restore it to the
original
EmptySite name.
c) Select Download & save current
site to save the site details and download
them to a PC via RS232/USB provided the
RS232/USB link is connected and
correctly set-up.
d) Select Exit to return to the MAIN MENU.
Pipe wall material : Mild Steel
Lining material : ---------
Sensor set : A-ST
Sensor mode : Reflex
Fluid type : Water
Save current site & read flow
Delete this Site
Download & save current site
Exit
2. Select Zero Cutoff (m/s) and press the
ENTER key.
3. Enter the value for the Zero Cutoff (e.g. 0.06
m/s) then press the ENTER key.
4. Scroll down to select Exit and press the ENTER
key to return to the FLOW READING screen.
FLOW READING OPTION DD-MM-YY HH:MM:SS
Data review
Zero Cutoff (m/s) : 0.00
Set zero flow (m/s) : 0.00
Damping (secs) : 10
Totalizer : Run
Reset +Total