Mode 7: First Flush / Rain Water Harvest
Rain Gauge output on means rain water is being
harvested and first flush has occurred.
Switch Behavior
8 7 6 5 4 3 2 1 Level (in) Gallons Clean Time (days)
0 1 1 1 X 0 0 0 0.02 12 3
0 0 1 0.04 25 5
0 1 0 0.08 50 9
0 1 1 0.16 100 13
1 0 0 0.20 125 15
1 0 1 0.24 150 17
1 1 0 0.28 175 19
1 1 1 0.32 200 21
0 X X X Normal Clean Time
1 Gets Dirty Fast
Note: Switch 8 must be off for this mode.
The RG-11 can be used in a Rain Water Harvest / First Flush
application. In this mode, the RG-11 will not change the relay state
until a certain amount of water has fallen. After a certain amount of
water has been detected, the relay opens, diverting the water to a
proper holding tank. So configured, the output relay acts as an
"Enable Harvest" control, indicating that at least the desired amount
of rainfall has accumulated.
Level
The amount of water that will accumulate before the relay closes.
Gallons
The number of gallons per thousand square feet of collected area
that are diverted. Note that a conventional first flush diverter system
totalizes water after it has made it through the collection system. The
RG-11 enables the system as soon as the threshold has fallen, which
may be substantially sooner. Take this into account when designing
your system.
Clean Time
After the rainstorm is over and the relay of the RG-11 is once again
open, it will take some time for the collecting surface to become dirty
again, and once again require a complete first flush. Clean time
means how many days, after the water stopped, it takes for the
system to require a full flush. Up to that time, the system will flush
less. For example, a system is set to flush 0.08 of accumulation, and
thus the clean time is 8 days. If a storm comes after only 4 days, the
system will flush only half as much water before enabling harvest
again.
Gets Dirty Fast = Switch 4 ON
If switch 4 is on, the system remains enabled for only 12 hours after
the rain storm stops. Also, the Clean Time is halved. Use this setting
if the surface becomes contaminated especially quickly.
SAFETY, LIMITS OF RAIN GAUGE LIABILITY,
AND WARRANTY
Only the rain sensor is covered-- absolutely no consequential
damages. If this policy is unacceptable in your installation, do
not use the RG-11.
It is the responsibility of the systems integrator and purchaser of the
Rain Gauge to insure a safe installation. Any mechanical system,
including one that incorporates a Rain Gauge, requires appropriate
safety interlocks. Hydreon Corporation (Hydreon) warrants only the
actual cost of the sensor, and only that it is free from defects in
workmanship.
The Rain Gauge is warranted to be free from defects for a period of
one year from date of purchase. Under no circumstances will
Hydreon be liable for any consequential damages due to failure or
any other mishap involving a Rain Gauge. Hydreon's liability in the
event of a failure, or inability to sense a condition, is limited to the
actual cost of the particular sensor. Explicitly, if other objects are
destroyed due to water damage, or if any object is destroyed
because of a false indication of water, Hydreon is in no way
whatsoever liable for anything other than the cost of the Rain Gauge,
and then only if the Rain Gauge is shown to have some defect in
materials or workmanship. Limitations and imperfections of the Rain
Gauge do not constitute a defect. Further, if some valuable data is
not gathered because an erroneous indication of any sort due to the
Rain Gauge, Hydreon is liable only for the cost of the Rain Gauge.
It is the responsibility of the system designer and purchasers of the
Rain Gauge to insure that a failure of the Rain Gauge will not cause
consequential damages. If a failure in Rain Gauge would cause
disaster, we recommend against deployment of the Rain Gauge, or
against the system in which the Rain Gauge is deployed. If a failure
of a Rain Gauge would cause great expense, Hydreon recommends
redundant Rain Gauges, and even in that case do not assume any
liability for consequential damages. It is the responsibility of the
system designer and purchasers of the Rain Gauge to be aware of
performance limitations of the device. If a Rain Gauge fails for any
reason Hydreon will not be responsible for the labor of servicing and
or installing and/or removing the Rain Gauge. Labor is NOT
COVERED. Hydreon recommends that the system designer perform
a Failure-Mode Effects Analysis that includes the possibility of Rain
Gauge failure. If a potential purchaser of the Rain Gauge does not
agree with these terms, we ask that the potential purchaser not buy
the Rain Gauge. Deployment of the Rain Gauge implies
understanding and agreeing to these limits of liability.
Apply engineering judgment: Hydreon does not claim the RG-11 is a
perfect rain sensor. It is what it is, and senses what it senses.
CASE and COSMETIC POLICY
Some amount of yellowing or discoloration of the case is considered
normal cosmetic aging of the device, and sensors so affect will not be
replaced under warranty. Tiny cracks or crazing within the lens is
also considered cosmetic, and units so affected will be replaced only
if they are deemed by Hydreon corporation to be considered to be of
a functional nature.
Rain Gauge Model RG-11 Instructions PN 55-005-100 Manual for SW rev 016
