4230 Flow Meter
Section 2 Programming
2-48
This option allows you to send flow pulses periodically to the
sampler during the time the conditions you established for
sampler pacing are not being met. Again, entering 0 sends no
pulses.
2.12 Step 6 - Sampler
Enable
The operation of step 6, Sampler Enable is similar to step 5,
Sampler Pacing. The menus and options are similar. The dif-
ference is that where sampler pacing only causes the flow meter
to send a momentary signal (flow pulse) to the sampler, sampler
enabling actually controls an inhibit line to the sampler that can
keep the sampler from running its program. Sampler enabling is
useful where the sampler needs to remain idle for long periods of
time, such as storm water runoff applications.
When you select or advance to step 6, the following display will
appear:
(FLOWLINK) may also appear. The FLOWLINK menu option
will not appear unless FLOWLINK software has been installed.
DISABLE means that the sampler will be permanently inhibited
by the flow meter. This condition will remain until you change it
in this program step, or if you are using FLOWLINK, until it is
overridden by a command from FLOWLINK. Select the
DISABLE option with care; it will make the sampler appear to be
inoperative, and that could easily be misinterpreted as an
equipment failure by someone not familiar with the pro-
gramming of the flow meter.
ENABLE means that the sampler is permanently enabled, free
to run its own program without any control from the flow meter.
This condition will remain until you change this menu option, or
until it is overridden by a command from FLOWLINK.
The STORM option will not appear unless you turned on rainfall
measurement in step 1. STORM selection is what you use when
you want to monitor storm water runoff. STORM enabling is
really a combination of conditions. First, enter a value for
LEVEL in the flow stream. Second, enter a value for RAINFALL.
Third, enter an amount of time over which the rainfall occurs.
Finally, you enter a time since the last rainfall. You must have an
Isco Rain Gauge to measure rainfall. The following menus are
the STORM sequence:
Then:
SAMPLER ENABLE MODE
• DISABLE • • ENABLE • • CONDITIONAL • • (STORM) •
LEVEL
GREATER THAN X.XXX FT (Or other units, as selected.)
RAINFALL AMOUNT
X.XX INCHES (Or other units, as selected.)
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