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1.5.2 Non-Isco Flow Meters
1.5.3 Samplink for Sampling
Data Retrieval
Certain flow meters, when equipped with a rain gauge, monitor
rainfall. You can program the flow meter to enable the sampler
when the measured amount of rainfall reaches a predetermined
set point. You can select set points or pairs of set points (pairs
can be level and rainfall rates, level and elapsed time, rainfall
and elapsed time, and so on) from the sampler-enable control con-
dition. A control condition is simply the set of parameters
defining the conditions in which a flow meter will enable the
sampler. For example, the user can program a flow meter with a
control condition, which is satisfied when the flow meter detects
1
/
inch of rainfall in 15 minutes. Although you can enter
4
level-control conditions directly at the flow meter's front panel,
you must download most control conditions to the flow meter
from an IBM-compatible computer running Teledyne Isco's
®
Flowlink
software.
In addition to enable-control conditions, Teledyne Isco's 4200
Series Flow Meters, 2100 Series Flow Modules, and 4100 Series
Flow Loggers provide an internal memory module. When pro-
grammed with the Flowlink software, the flow meters store level
or flow rate readings, rainfall measurements, and sample-event
data from the samplers. The 3700 Sampler sends event marks to
Isco Flow meters each time a sample is taken.
You can retrieve the stored data from the Isco Flow Meter, which
expands the information available from the sampler's results dis-
plays, with a computer running Flowlink. For more information
on sampler-enable control conditions and data retrieval, refer to
the help section provided with the Flowlink software.
You can connect certain non-Isco Flow meters directly to a 3700
for flow-paced sampling. The flow meter must have an isolated
contact closure of at least 25 milliseconds to provide acceptable
flow pulses to the sampler. The frequency of the contact closure
must be directly proportional to total flow.
If the flow signal is not compatible with Teledyne Isco's standard,
Teledyne Isco offers special interfacing devices. See Sections
4.3.2 and 4.3.3.
Teledyne Isco provides an additional software package that col-
lects data from the sampler's memory: Samplink, which runs on
a PC or laptop computer that can be transported to the sampling
installation to collect the data through the connector on the side
of the sampler controller labeled PRINTER. Samplink collects
data and formats a text file that can load into a word processor
for editing, and a Flowlink-compatible sample-event file. Sam-
plink's file contains the same reports produced by the Teledyne
Isco Field Printer, which is no longer sold by Teledyne Isco. The
first report contains sampler-status information and program
settings.
The second report contains the sampling results. Because the
text file is preformatted into report form, you can use DOS
printing commands to print the file without editing with a word
processor. The sample-event files are identical to those created by
3700 Portable Samplers
Section 1 Introduction
1-9
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