PASCO Specialty & Mfg. CI-6730A User Manual download pdf

Instruction Sheet

for the PASCO

Model CI-6730A

Flow Rate Sensor

012-08624A

Introduction

The PASCO CI-6730A Flow Rate Sensor measures flow

rate in feet/sec (or meters/sec) and is designed for use with a

PASCO 500 or 750 computer interface. The CI-6730A

Flow Rate Sensor comes labeled with a metric/english

measurement scale and is expandable to seven feet.

The Flow Rate Sensor transforms the kinetic energy of

moving water into electric pulses that can be converted into

measurements and viewed in DataStudio software. The

Model CI-6730A Flow Rate Sensor differs from the

previous CI-6730 Flow Rate Sensor in that it uses a Hall

effect sensing element instead of a magnetic reed switch. A

Hall effect sensing element minimizes artifact pulses that

sometimes occur with a magnetic reed switch, allowing for

improved accuracy.

The Flow Rate Sensor uses a removable turboprop propeller

that rotates when only a small amount of water moves past

it. The turboprop is mounted on a low-friction brass shaft, is

protected inside a 2-inch diameter housing, and is designed

to shed debris. There is no direct mechanical linkage

between the turboprop and the sensing element that might

interfere with the free movement of the prop.

The propeller has two magnets. When the propeller

rotates, the Hall effect sensing element built into the

housing of the Flow Rate Sensor generates an electrical

impulse. The propeller makes 4.31 revolutions for each

linear foot of water that passes, so 8.62 pulses are

produced for each linear foot of water passing through

the housing. Thus, the rate at which the impulses are

generated is directly proportional to the flow rate.

The Flow Rate Sensor feeds the electrical pulses into

DataStudio through a digital port in the 500 or 750

computer interface. In DataStudio, the time between the

electric pulses is measured and converted to velocity

measurements (feet/second). Other units, such as

nautical miles per hour (knots), meters per second, or

miles per hour, may be defined by the user in

DataStudio’s Experiment Calculator.

Equipment included:

• Flow Rate Sensor

Additional Equipment Required:

• A PASCO ScienceWorkshop® computer interface

[500 (for outdoors) or 750 (for classroom)]

• Computer

propeller

digital plug for computer

interface

Close-up view of the propeller

propeller

Flow Rate Sensor

1 2 3 4

Summary of Contents

Page 1 - Flow Rate Sensor

Instruction Sheetfor the PASCOModel CI-6730AFlow Rate Sensor 012-08624AIntroductionThe PASCO CI-6730A Flow Rate Sensor measures flowrate in feet/sec (

Page 2 - Figure 1:

Flow Rate Sensor 012-08624A2Interface50012GAIN=1,10:ISOLATEDGAIN =1,10: REF TO GNDGAIN = 1: REF TO GNDAsCONANALOG CHANNELSBnDIGITAL CHANNELSScienceW

Page 3 - Stream Bed

012-08624A Flow Rate Sensor3Flow Rate ActivityEquipment required: Flow Rate Sensor (CI-6730A),ScienceWorkshop 500 interface, DataStudio software, a s

Page 4 - Warranty

Flow Rate Sensor 012-08624A4WarrantyFor a description of the product warranty, see the PASCOcatalog.Address: PASCO scientific10101 Foothills Blvd.P.O.

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PASCO Specialty & Mfg. CI-6730A User Manual

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