Teledyne 4220 User Manual

Page 73

4220 Flow Meter

Section 2 Programming

2-45

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 over-
ridden 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.

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 674 Rain Gauge, or approved
equal to measure rainfall. The following menus are the STORM
sequence:

Then:

If you press the right arrow key several times, the following
times will appear:

The intervals above are the periods of time over which the
rainfall occurs. The amount of rain entered in the previous step
and detected by the rain gauge must fall during the time interval

SAMPLER ENABLE MODE
• DISABLE • • ENABLE • • CONDITIONAL • • (STORM) •

LEVEL
GREATER THAN X.XXX FT (or other units of measure)

RAINFALL AMOUNT
X.XX INCHES (or other units of measure)

RAINFALL TIME PERIOD
• 15 MIN • • 30 MIN • • 1 HR • • 2 HR • • 4 HR •

RAINFALL TIME PERIOD
• 6 HR • • 8 HR • • 12 HR • • 24 HR • • 48 HR • • 72 HR •