Omega Products RG-2501 Installation Manual
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RG-2501
Series
@m
Tipping Bucket Rain Gauge
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An OMEGA
OMEGx]
Technologies
Company
Operator’s Manual
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Unpacking Instructions
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Remove the Packing List and verify that you have received all equipment, including the following
(quantities in parentheses):
RG-2501 Tipping Bucket Rain Gauge (1)
Operator’s Manual (1)
If you have any questions about the shipment, please call the OMEGA Customer Service
Department.
When you receive the shipment, inspect the container and equipment for signs of damage. Note
any evidence of rough handling in transit. Immediately report any damage to the shipping agent.
The carrier will not honor damage claims
inspection. After examining and removing contents, save packing material and
carton in the event reshipment is necessary.
unless all shipping material is saved for
TABLE OF CONTENTS
Chapter 1 Introduction
1.1 General Description
1.2 Specifications
Chapter 2 Installation
2.1 Site Requirements
2.2 Installation
Chapter 3 Operation
Chapter 4 Calibration
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Table of Standard Calibration Quantities
Chapter 5 Maintenance
Chapter 6 Troubleshooting
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Chapter 1: Introduction
1.1 General Description
The OMEGA@ Model RG-2501 Tipping Bucket Rain Gauge provides an inexpensive yet
accurate method for measuring and recording rainfall. The tipping bucket design provides a
means for operating an magnet-sensitive switch. The switch contact closure may be used with
electro-mechanical counters, event recorders or electronic recording equipment to
automatically obtain a record of the rainfall. The standard model of the rain gauge, Model
RG-2501, produces a switch closure for each 0.01 inch of rainfall. The Model RG-2501M
switch closure represents 1 millimeter of rainfall. Other calibrations of the rain gauge are
available upon request. The tipping bucket design allows unlimited measurements since the
tipping action dumps the water out of the bucket on alternating tips. Drain holes in the base
plate allow the water to drain out of the gauge.
All OMEGA@ rain gauges are made of the highest quality materials to provide long term,
trouble free operation with a minimum of maintenance as long as each gauge has been
properly installed and maintained. Parts of the rain gauge are made of aluminum with
anodized or painted finishes. Fasteners are all stainless steel except for the aluminum pop
rivets used to hold the bug screens in place. Some components are made of plastic, including
the terminal block, the signal cable strain relief, the calibration screw acorn nuts, the bearing
spacers, and the bearing inserts.
The basic rain gauge assembly includes a removable outer funnel, the tipping bucket
assembly, the magnet and switch assemblies, and the outer housing assembly. The main
sensor assembly with the tipping buckets, switch, magnet and signal terminal block is
mounted onto a bracket that is fastened to the base plate. Two adjustable screws provide the
calibration of the buckets by changing the position of the bucket stop point.
Three adjustable legs allow the gauge to be fastened permanently onto a platform or deck
using standard fasteners. Slots in the legs provide some adjustment for leveling the gauge. A
two-conductor, shielded cable with a wire size between 18 and 24 AWG should be used to
connect the rain gauge output into the monitoring or recording equipment. A two position
terminal block is provided for attaching the cable into the switch. Power for operating the
switch originates within the monitoring/recording equipment and is typically a pulse ranging
from 5 to 12 VDC.
The Model RG-2501 and RG-2501M rain gauges are not available in heated versions for use
in cold climates. These two gauges are designed and sold as low cost general purpose rain
gauges and are best suited for standard rainfall measurements only. Refer to the
NovaLynx
catalog or contact the company to obtain information regarding other types of rain gauges
that are available for more specialized uses.
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