Teledyne 4220 - Manual (Page 79)

4220 Flow Meter
Section 2 Programming
2-51
(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.
You would enter here the lowest pH value you expect to see in
your flow stream:
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:
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.
PRINTER LINE A BOTTOM SCALE
X.XX pH (or other condition, as selected previously)
PRINTER LINE A FULL SCALE
X.XX pH (or other condition, as selected previously)
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•