Teledyne 4250, Инструкция по установке и эксплуатации, Страница: 86 / 204

4250 Flow Meter
Section 2 Programming
2-58
Program selections made in this step will determine the
appearance of the printer/printer’s chart. The first menu will
request the speed of the chart.
If you select OFF, the printer will be disabled. No data will be
printed. The flow meter will, however, still print reports if you
activate that in
step 9 . The choice made from the other speeds
depends on the amount of data you need to record. If you are
recording from a stable situation and are using only one data
line, and you want to achieve maximum life for the paper roll,
select a lower speed for chart advance. If there is a great deal of
activity in your stream, and you need to use all three data lines,
selection of a faster chart speed will produce a chart more easily
read and interpreted. After you select the printer speed, the flow
meter will ask you to define what you want depicted by LINE A.
(The printer can print as many as three separate lines at the
same time.) The following will appear:
(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. Selection depends on the range you would normally 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
ENTER PRINTER SPEED
• OFF • • 1/2"/HR • • 1"/HR • • 2"/HR • • 4"/HR •
INPUT FOR PRINTER LINE A
• (LEVEL) • • (VELOCITY) • • (FLOW RATE) • • (pH) • • OFF •
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)