Teledyne 4250, Installation And Operation Manual, Page: 64 / 204

4250 Flow Meter
Section 2 Programming
2-36
CLEAR erases an entire data point set from the flow meter’s
memory.
PRINT allows you to print the entire contents of a data point set
you have entered on the flow meter’s internal printer.
SAVE instructs the flow meter to save a set of data points as you
have entered it.
If you select EDIT POINT, the flow meter will display the fol-
lowing:
Enter the number of the data point you want to change, not the
value of it. Press Enter .
The following display will appear:
After you have entered all the data points, the flow meter will
request that you enter a value for MAXIMUM HEAD and
MAXIMUM FLOW. The flow meter uses this value to calculate
the flow profile for the stream. You must know what the
maximum head for your flow stream is. You should enter a value
that is reasonable for your own application, rather than the
largest value possible. The flow calculation is based on this
value.
2.4.5 Step 2 - Flow
Conversion
(Level-to-Flow Rate)
Use this flow conversion only if you do not wish to calculate flow
f r o m a r e a a n d v e l o c i t y. N o r m a l l y, t h e 4 2 5 0 i s u s e d i n
area-velocity installations. This selection allows you to use the
4250 with a primary measuring device, Manning applications, a
custom flow equation, or data points.
)
WEIR/FLUME = weir or flume; EQUATION = equation;
MANNING = Manning; DATA POINTS = data points.
If you select WEIR/FLUME, the following will appear:
For detailed information on weirs and flumes, refer to the Isco
Flow Measurement Handbook . Consulting the manufacturer of
the specific weir or flume is also worthwhile. Note that for weirs
and flumes, there is a preferred location for installing the level
measuring device. Proper mounting of the level measurement
device and accurate measurement of the level in the flow stream
ENTER POINT NUMBER TO EDIT
POINT NUMBER TO EDIT:
X
SET
X
DATA POINT
X
'EXIT' TO QUIT
ENTER: X.XX (level units) X.XX (area units)
FLOW CONVERSION TYPE
• WEIR/FLUME • • EQUATION • • MANNING • • DATA POINTS •
TYPE OF DEVICE:
• WEIR • • FLUME •