4230 Flow Meter
Section 2 Programming
2-55
Enter here the highest pH value (or other condition) you expect
to see in your stream. Note that selection depends on the range
that you would normally expect to see. If your stream varies from
6 to 8 pH units, you would not want to enter 0 and 14 as limits.
The 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 in the flow meter.
Selection of OFF from the INPUT FOR PRINTER LINE menu
will cause the printer to leave this line blank. Selection of condi-
tions other than pH, D.O., TEMPERATURE, or YSI functions
will result in a request that you enter the full-scale value for the
condition being plotted. For example, if you selected LEVEL as a
condition, the following would appear:
The flow meter will automatically go 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 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, temperature, etc.) Note that the
flow meter is capable of multiple over-ranges.
(TEMPERATURE), (YSI pH), (YSI D.O.), (YSI CONDUC-
TIVITY), and (YSI TEMP) may also appear.
Again, just as for line A, you can select another condition to plot
on the chart. The flow meter will request a full-scale value, or
bottom and full-scale values. These values can differ from that
entered for line A.
(TEMPERATURE), (YSI pH), (YSI D.O.), (YSI CONDUC-
TIVITY), and (YSI TEMP) may also appear.
For line C, you can select yet another condition to plot on the
chart. The flow meter will also request entry of a full-scale, or
bottom and full-scale values, as for the previous two lines.
You must have an Isco Rain Gauge connected to the flow meter to
measure rainfall. Output is recorded in either inches or milli-
meters. There is only one over-range for rainfall.
PRINTER LINE A FULL SCALE
X.XXXX FEET (or other units of measure, as selected)
INPUT FOR PRINTER LINE B
•(LEVEL) • • (FLOW RATE) • • (D.O.) • • (pH) • • OFF•
INPUT FOR PRINTER LINE C
•(LEVEL) • • (FLOW RATE) • • (D.O.) • • (pH) • • OFF•
PLOT RAINFALL ON CHART?
• NO • • YES •
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