Teledyne 4220 Installation And Operation Manual page 61

If you select TRAPEZOID for the Manning flow conversion, the
following displays will appear:
MANNING TRAPEZOID
SLOPE=X.XXXXX ROUGH=X.XXX
(Slope and roughness are entered as for ROUND PIPE previ-
ously.) Then:
MANNING TRAPEZOID
TOP WIDTH=X.XXX FEET (or meters)
Then:
MANNING TRAPEZOID
BOTTOM WIDTH=X.XXX FEET (or meters)
Returning to Step 2, FLOW CONVERSION TYPE, if you select
DATA POINTS, the following will appear:
SELECT DATA SET
• ONE • • TWO • • THREE • • FOUR • • (NONE) •
Then:
LEVEL UNITS FOR DATA POINT ENTRY
• FT • • IN • • M • • MM •
This allows you to enter data points that are in different units
than what you are using. Then:
FLOW RATE UNITS
• GPM • • GPS • • MGD • • CFS • • CFM • • M3S • • M3H • • M3D •
If you press the right arrow key several times, the following
units will appear on the display:
FLOW RATE UNITS
• LPS • • CFD • • GPH • • AFD • • CFH • • CFM • • M3M •
GPM = gallons per minute; GPS = gallons per second, MGD =
million gallons per day, CFS = cubic feet per second; CFM = cubic
feet per minute, M3S = cubic meters per second; M3M = cubic
meters per minute; M3H = cubic meters per hour; M3D = cubic
meters per day; LPS = liters per second; CFD = cubic feet per
day; GPH = gallons per hour; AFD = acre-feet per day; CFH =
cubic feet per hour.
DATA POINT flow conversion allows you to enter measured level
and flow rate values for a number of different points. The 4220
Flow Meter can accept up to four sets of data points with each set
containing as many as fifty points.
The flow meter then performs a three-point interpolation to cal-
culate a flow rate appropriate for the data entered. The common
use of data point flow conversion is with unusual primary mea-
suring devices, specifically devices that the 4220 does not
support in the WEIR/FLUME flow conversion set.
4220 Flow Meter
Section 2 Programming
2-33