Badger Meter 735 Sensors User Manual

Series 735PV

Plastic Tee Type Impeller Flow Sensor

Sections of this document marked with or must be consulted for safe use of the product.

880096-0001-EN (January 2013)

Rev. 3 Installation & Operation Manual

Series 735PV Plastic Tee Type Impeller Flow Sensor

CONTENTS

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

ELECTRONIC TYPES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

IR Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Model 735PV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

MECHANICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

ELECTRICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

INSTALLATION INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Calibration Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Calibration Table for Series 735PV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

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Installation & Operation Manual

INTRODUCTION

Used in conjunction with any Badger Meter flow monitor or endpoint, Badger Meter non-magnetic Impeller flow sensors
provide an accurate reading of the rate of liquid flow as well as total accumulated flow. A number of sensor models are
offered, which cover applications for a wide range of pipe sizes and pressure/temperature specifications.

The flow sensors generate a frequency which is proportional to flow rate. An internal preamplifier allows the pulse signal
to travel up to 2000 feet without further amplification. The impeller bearing assembly, shaft and o-rings are replaceable
in the field.

The Series 735 Impeller flow sensors feature a four-bladed impeller design, using a proprietary, non-magnetic sensing
technology. As the liquid flow turns the impeller, a low impedance signal is transmitted with a frequency proportional
to the flow rate.

Sensors of similar type are interchangeable, so there is no need for recalibration after servicing or replacement.

ELECTRONIC TYPES

Sensors are normally supplied with two single-conductor 18 AWG solid copper wire leads with U.L. Style 116666 direct burial
insulation. These IR models are used in below grade applications such as irrigation, municipal, and groundwater monitoring.
All Badger Meter Series 735 sensor electrical components are self-contained. Pressure/temperature ratings for the various
models are contained in "SPECIFICATIONS" on page 10. These models can be further described as follows.

IR Sensor

Designed for below grade applications such as irrigation, municipal, and groundwater monitoring where the flow rates are
between 2...20 feet/second and temperatures are below 110° F. IR sensors are supplied with two single conductor, 18 AWG
solid copper wire with U.L. Style 116666 direct burial insulation.

Model 735PV

These models feature a modified PVC tee with solvent weld socket end connections, and a removable PPS sensor insert. Available
sizes include 1/2", 3/4", and 1" BSP threaded adapters also available.

The impeller style flow sensor described in this manual is not intended for use in safety critical applications.
Use of the device in this manner is done at the sole discretion of the customer and/or end user of the device

The impeller style flow sensor described in this manual is not intended for use in systems with flammable liquids or
gases. Additionally, the device is not intended for systems containing hazardous fluids, or fluids other than water.

The impeller style flow sensor described in this manual must be installed in accordance with all local and federal codes
or end use standards as applicable.

If the devices described in this manual are used in a manner not specified by the manufacturer, the protection provided
by the equipment may be impaired.

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Series 735PV Plastic Tee Type Impeller Flow Sensor

MECHANICAL INSTALLATION

Depressurize and vent piping system prior to any installation or maintenance of the flow sensor.

General

The accuracy of flow measurement for all flow measuring devices is highly dependent on proper location of the sensor in the
piping system. Irregular flow velocity profiles caused by valves, fittings, pipe bends, etc. can lead to inaccurate overall flow
rate indications even though local flow velocity measurement may be accurate. A sensor located in the pipe where it can be
affected by air bubbles, floating debris, or sediment may not achieve full accuracy and could be damaged. Badger Meter flow
sensors are designed to operate reliably under adverse conditions, but the following recommendations should be followed to
ensure maximum system accuracy:

• Choose a location along the pipe where ten pipe diameters upstream and five pipe diameters downstream of the sensor
provide no flow disturbance. Pipe bends, valves, other fittings, pipe enlargements and reductions should not be present
in this length of pipe.

• The preferred location for the sensor around the circumference of a horizontal pipe is on top. If trapped air or debris will
interfere, then the sensor should be located further around the pipe from the top but not more than 45 degrees from
top dead center. The sensor should never be located at the bottom of the pipe, as sediment may collect there. Locations
off top dead center cause the impeller friction to increase, which may affect performance at low flow rates and increase
wear. Any circumferential location is correct for installation in vertical pipes. Rising flow preferred to reduce effects of any
trapped air.

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