Teledyne 4220 installation and operation guide Printer Line a Bottom Scale

4220 Flow Meter

Section 2 Programming

(TEMPERATURE), (YSI pH), (YSI D.O.), (YSI CONDUC- TIVITY), and (YSI TEMP) can also appear. Remember that menus in parentheses may not appear due to previous program selections. Either pH or D. O. may appear, but not both. The various YSI options will only appear if you enabled the YSI 600 in step 1. You must have the appropriate probes to sense these conditions. Select OFF if you do not need this line. If you select pH, D. O., TEMPERATURE, or any of the YSI options, the flow meter will request that you set limits that will serve as the bottom of the chart and the chart full-scale.

PRINTER LINE A BOTTOM SCALE

X.XX pH (or other condition, as selected previously)

You would enter here the lowest pH value you expect to see in your flow stream:

PRINTER LINE A FULL SCALE

X.XX pH (or other condition, as selected previously)

Enter here the highest pH value you expect to see in your flow stream. Note that selection depends on the range you would nor- mally see. If your stream varies from 6 to 8 pH units, you would not want to enter 0 and 14 as limits. Chart resolution would be poor. You could enter 5 and 9 pH and still have good resolution if there were sharp deviations because of the availability of over-ranges. Selection of OFF from the INPUT FOR PRINTER LINE menu will leave this line blank. Selection of conditions other than pH, D.O., TEMPERATURE, or YSI-functions will result in a request that you enter the full-scale value for the con- dition being plotted. For example, if you selected LEVEL as a condition, the following would appear:

PRINTER LINE A FULL SCALE

X.XXXX FEET (or other units of measure, as selected)

The flow meter automatically goes into over-range if the data goes higher than the full-scale value you have selected. You can easily recognize over-range operation by the plotted line running off the right side of the chart and then immediately reappearing on the left side of the chart. Because of the over-range feature, you can set a full-scale value that gives you good resolution on the chart. At the same time, the automatic over-range will prevent the loss of recorded data if the plotted line rises past the full-scale point. For the other conditions, the full-scale units will be appropriate for what is being measured (D. O., pH, temper- ature, etc.) Note that the flow meter is capable of multiple over-ranges.

INPUT FOR PRINTER LINE B

•(LEVEL) • • (FLOW RATE) • • (D. O.) • • (pH) • • OFF•

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