Teledyne 4250, Инструкция по установке и эксплуатации, Страница: 38 / 204

4250 Flow Meter
Section 2 Programming
2-10
Again, changing or meeting a condition or set of conditions
triggers the enabling. The conditions that can be used for
sampler enabling are similar to those used for sampler pacing:
level, flow rate, rainfall, temperature, dissolved oxygen, pH, or a
combination of these conditions. The YSI 600 Sonde provides
several measurements at the same time. You must have the
appropriate sensors for rainfall, temperature, D. O., pH and the
YSI outputs.
2.3.7 Step 7 - Alarm Dialout
Mode
Note
You must have the optional modem to make use of this pro-
gram step. The menus will not even appear unless the flow
meter has a modem installed.
This feature allows you to program a 4200 Series Flow Meter to
signal a remote location through a telephone line. The Alarm
Dialout is useful if you need to signal a remote location when
there is a change of condition in the flow stream that could con-
stitute an alarm. You can program as many as five different
eighteen-digit telephone numbers into the flow meter in
decreasing order of importance. The modem is capable of speech.
DISABLE inhibits this function altogether. CONDITIONAL
lets you program the flow meter to signal these alarms for a
variety of reasons. You can use rainfall, time, level, flow rate, dis-
solved oxygen, pH, rate-of-change, a combination of conditions, or
define the operation through Flowlink software from another
computer.
STORM lets you set the alarm through a combination
of rainfall and time. You can also program the interval between
calls and set up the system to reset the alarm condition by
dialing back from the remote telephone.
2.3.8 Step 8 - Printer All 4250 Flow Meters have a built-in printer. The printer is more
than just a printer, as it is capable of plotting linear data along
with printing alphanumeric (letters and numbers) messages. In
this step you set the speed for the chart to advance, from
1
/
2
" to 4"
per hour. Chart speed is set according to the amount of resolution
you want to see on the chart. If there is much activity on the
chart, you would generally choose a faster speed so the marks are
more “spread out” and are easier to interpret. If there is little
activity on the chart and you want the flow meter to run for long
periods without having to change the chart paper roll, you would
probably pick a slower speed.
The flow meter is capable of plotting three separate data lines on
the chart in addition to the alphanumeric messages. These lines
may indicate various things, such as level, flow rate, pH, dis-
solved oxygen, or temperature. Note that you must have the
appropriate sensors for pH, DO, and temperature to make use of
these plots. Rainfall is printed as a bar-graph. The printer is
capable of plotting over-ranges for the data lines it plots. You can