4220 Flow Meter
Section 5 Options and Accessories
5-8
• It must provide a contact closure for every 0.01" (or 0.1
mm) of rainfall
A cable assembly is available to connect a user-supplied rain
gauge to the flow meter. More information about the rain gauge
is available from the factory or the Rain Gauge Manual.
Figure 5-1 674 Tipping Bucket Rain Gauge
5.5 Isco Flowlink Software Teledyne Isco offers a proprietary software system for data acqui-
sition, 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.
5.6 High-Low Alarm Relay BoxTeledyne 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% increments. Output from the unit is the switching of form C
(SPDT) relay contacts. The unit has 2 relays; one for high alarm