4210 Flow Meter
Section 2 Programming
2-43
SELECT OPERATOR allows you to trigger the sampler from a
single condition or from two conditions. Suppose you wanted to
trigger the sampler from only one condition, level. You would
select LEVEL as the condition, and then identify what change in
LEVEL would be the trigger. Then you would select DONE for
the SELECT OPERATOR step. Selection of DONE will advance
the flow meter to the next program step.
However, suppose you wanted to select two conditions, either of
which would trigger the sampler. In this case, you would select
OR for the SELECT OPERATOR step. The menu will return to
the one listing the conditions. This will let you define the second
condition. Now the flow meter will trigger the sampler when
either condition changes.
Finally, suppose you had a situation where you wanted changes
in two conditions to occur before you signalled the sampler. In
this case, you would select AND for the SELECT OPERATOR
step. Then you would define the second condition. Now the flow
meter will signal the sampler only after both conditions have
changed.
The next screen on the flow meter (after you have established the
conditions for sampler pacing) will request the following.
(Entering 0 sends no pulses):
This option allows you to send flow pulses periodically to the
sampler during the time the conditions you established for
sampler pacing are being met. Then:
This option allow 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.
2.11 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 is 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
CONDITION TRUE PACING INTERVAL
PACE EVERY X MINUTES
CONDITION FALSE PACING INTERVAL
PACE EVERY X MINUTES
SAMPLER ENABLE MODE
• DISABLE • • ENABLE • • CONDITIONAL • • (STORM) •
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