4210 Flow Meter
Section 4 Optional Equipment
4-9
4.7 Isco FLOWLINK
Software
Isco offers a proprietary software system for data acquisition,
storage, retrieval, and analysis. This software system,
FLOWLINK, contains programs that allow 4200 series flow
meters to store blocks of level and other data readings in the flow
meter's memory. You retrieve this stored data with either a
laptop computer or central computer connected to the flow meter
by modem. You can use other programs in the package to process
the retrieved data for further analysis. In addition to storing
data, this software makes it possible to divide part of the flow
meter's memory into partitions. These partitions may be for-
matted in “rollover” or “slate” mode of data storage. You can also
set up the flow meter to store data as a result of some sort of
“triggering” event, such as level rising to a predetermined point,
the passage of a predetermined time interval, or the occurrence
of a storm event, such as rainfall.
Consult the factory. A detailed explanation of the FLOWLINK
Software is beyond the scope of this manual. Information on
FLOWLINK Software is available from its manual or from the
factory.
4.8 High-Low Alarm Relay
Box
Isco offers a control box that monitors flow rate data available
from any 4200 Series Flow Meter. Alarm relays trip when the
flow rate exceeds or falls below pre-selected limits. High and low
set points are user-set and range from 0% to 99% in 1% incre-
ments. Output from the unit is the switching of form C (SPDT)
relay contacts. The unit has 2 relays; one for high alarm and the
other for low. The availability of form C contacts (both NO [nor-
mally open] and NC [normally closed] contacts) means you can
switch loads either on or off. Relay contacts are rated 3 Amperes
at 24 volts AC or DC. The alarm box operates on 12 VDC sup-
plied from the flow meter. Current consumption in standby con-
dition is approximately 10 mA. In alarm, current increases to
190 mA. You can connect as many as four alarm boxes to a flow
meter, if the flow meter is powered from the AC line.
Note
Do not use the alarm box if your flow meter has a modem or
uses FLOWLINK software (through either a modem or laptop
computer).
Use the alarm box with caution in battery-powered installa-
tions, as it will significantly increase power consumption.
In standby condition, an alarm box consumes about one
ampere-hour of battery capacity in four days (or reduces capacity
approximately 25%). In alarm condition, one alarm box will com-
pletely discharge a fresh (4 Ah) battery in 21 hours. Isco recom-
mends using only one alarm box in a battery - powered
installation, and you can expect to change the battery more
often.
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