Tipping Bucket Rain Gauge - Teledyne 4250 Installation And Operation Manual

4.5 Tipping Bucket Rain
Gauge
Figure 4-5 674 Tipping Bucket Rain Gauge
A Tipping Bucket Rain Gauge is available from Teledyne Isco for
use with 4200 Series Flow Meters. The gauge connects to the
flow meter by a cable terminated in an M/S connector. This con-
nector plugs into the Remote Printer/Rain Gauge connector on
the case. A Y-connect cable is available that allows use of both
the rain gauge and a YSI 600 Multi-Parameter Sonde at the
same time. You can connect extra cable (user-supplied) between
the rain gauge and the factory-supplied cable as long as you do
not exceed a maximum total length of 1,000 feet. Use 18 AWG
wire or larger. Do not cut the M/S connector from the cable.
The rain gauge is factory-calibrated to provide a contact closure
to the flow meter for every hundredth of an inch (0.01") [or 0.1
mm] of rainfall. Software in the flow meter stores this infor-
mation in memory and prints the accumulated data as a text line
on the printer chart. It also allows the printout to be expressed in
metric. You may, if you wish, provide a rain gauge of your own
choice, but to ensure compatibility with the flow meter's oper-
ating environment, it must conform to the following specification:
• It must provide an isolated, dry contact closure.
• It must be a normally open contact configuration.
• It must close for 100 ms (–25 ms +150 ms) with less than
2 ms contact bounce.
• 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.
4250 Flow Meter
Section 4 Options and Accessories
4-11