Teledyne 4220 installation and operation guide Then

4220 Flow Meter

Section 2 Programming

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.

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