Teledyne 4220 - Manual (Page 75)

4220 Flow Meter
Section 2 Programming
2-47
determine whether both conditions are necessary for enabling
(AND) or whether either condition will enable the sampler (OR).
If you select FLOW RATE:
You would select one of these options, and then enter a value, as
for LEVEL, previously.
The rest of the menus will appear the same as they did for
LEVEL and FLOW RATE. D. O., pH, TEMPERATURE, and
RAINFALL all require activation in step 1 and use of the appro-
priate sensor. Only one parameter condition (pH, D. O.) can be
measured by the flow meter at a time. pH and D. O. will not
appear on the display at the same time.
It is possible to program the sampler enable option so that it
operates in two different modes, latching and non-latching.
To explain this, in the non-latching mode the sampler will be
enabled only as long as the condition that caused the enabling
remains outside of “normal.” If the enabling condition returns to
“normal,” the sampler enable will turn off until the next time the
condition goes outside of “normal.”
In the latching mode, the sampler will be enabled the first time
the condition goes outside of normal and the sampler will stay
enabled regardless of any later changes to the enabling condition.
If this is the case, the following menu will allow you to reset the
sampler enable feature. Note that this menu will not appear
unless the condition necessary to enable the sampler has been
met and the sampler is currently enabled.
Or:
Select YES to reset the sampler enable feature; select NO to
leave the sampler enabled.
This selection allows you to turn the flow meter's internal printer
on or off when the sampler is enabled from the flow meter. This
allows you to conserve battery power and only print a chart when
the sampler is enabled. This feature is useful for monitoring
storm water runoff.
2.4.9 Step 7 - Alarm Dialout
Mode
This step lets you signal an alarm to a remote location from the
flow meter. The conditions that can cause an alarm are the same
as described previously for sampler enabling.
FLOW RATE
• GREATER THAN • • LESS THAN • • RATE OF CHANGE •
WHEN ENABLE CONDITION IS NO LONGER MET
• DISABLE SAMPLER • • KEEP ENABLED •
ENABLE CURRENTLY LATCHED, RESET
• NO • • YES •
PRINTER ON/OFF WITH ENABLE
• YES • • NO •