PASCO Specialty & Mfg. CI-6730A User's Manual
Contents
1. flow rate data for each of the intervals Average the flow rate recorded for each of the intervals Flow Rate Sensor 012 08624A 3 To determine the total water output for a given flow Warranty rate multiply the average flow rate by the total cross sectional area of the stream bed For a description of the product warranty see the PASCO catalog stream width Address PASCOscientific interval 10101 Foothills Blvd P O Box 619011 Roseville CA 95678 9011 Phone 916 786 3800 FAX 916 786 8905 Email techsupp pasco com Figure 2 Measuring the cross sectional area of a Web WWwW pasco com stream bed Flow Rate Sensor Specifications Range 0 3 13 ft s 0 1 4 m s Accuracy 0 1 ft s Minimumdepth 1 5 in 3 8 cm Sensor type Protected turboprop propeller with electromagnetic pickup Length 3 7 feet with telescoping tube Materials PVC housing fitting and handle anodized aluminum tube and brass propeller bearing i PASCOH scientific2. the DataStudio online help 2 On the back of the interface use the On Off button to turn on the interface 3 Plug the Flow Rate Sensor into one of the digital ports of the computer interface ScienceWorkshop ANALOG CHANNELS lt 500 Interface GY DORON as fu CHAN ELS ours E ooo onl Plug into a digital channel port Figure 1 Inserting the Flow Rate Sensor s digital plug into a digital port on the computer interface 4 Start DataStudio From the Sensors list drag and drop the Flow Rate icon to the digital port icon that corresponds to the digital port you are using on the computer interface 5 If the flow rate is expected to be less than 1 ft s decrease the sample rate to 2 seconds per sample To change the sample rate double click the sensor icon In the dialog box select the General tab and change the sample rate Click OK 6 On the Setup toolbar click the Logging button and follow the prompts Disconnect the 500 interface for remote data logging For more information on remote data logging see Remote Data Logging in the table of contents of the DataStudio online help 7 Atthe field site Insert the propeller of the Flow Rate Sensor into the body of water to be measured 8 To record data press the LOG button on the interface To end data collection press the LOG button again Note Do not turn off your interface or you will lose all of the data you recorded
3. 9 Reconnect the interface to your computer To retrieve 012 08624A your collected data into a DataStudio display press the Connect button on the Setup toolbar 10 To view a graph of a data run drag a run icon from the Data window to a Graph display Note To express the velocity in terms of meters second miles hour or knots create the appropriate calculation inthe DataStudio s Experiment Calculator Sensor Usage Tips sarery TIPS When using the Flow Rate Sensor outdoors follow standard water and outdoor safety precautions The Flow Rate Sensor is recommended for use in streams and lakes avoid turbulent waters or rivers Always inform students of potential hazardous conditions in the area Do not use the sensor in high winds adverse weather or avalanche conditions near potential land or mudslides or when standing on unstable ground Before using the sensor survey the area When inserting the Flow Rate Sensor into water stand on stable ground or in shallow water Keep the Flow Rate Sensor away from water that has lots of debris or potential obstacles If the propeller or sensor becomes lodged in a high velocity current or near a drop off do not attempt to remove the sensor In high risk situations only allow a water patrol officer or public safety official to remove the sensor e Always hold the pole vertically and keep the propeller in the direction of the current flow facing upstream e For higher water
4. Instruction Sheet for the PASCO Model CI 6730A 012 08624A Flow Rate Sensor Close up view of the propeller 4 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 F SCO 10701 Foothills Blvd Roseville CA 95747 7100 a Phone 916 786 3800 FAX 916 786 8905 www pasco com Flow Rate Sensor propeller digital plug for computer interfa
5. ce 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 e Flow Rate Sensor Additional Equipment Required e A PASCO ScienceWorkshop computer interface 500 for outdoors or 750 for classroom e Computer hanes fo PORD acne Flow Rate Sensor Flow Rate Sensor Operation gt Note The PASCO 500 computer interface is recommended for outdoor studies of flow rate Before collecting data in the field ensure that the 500 interface contains four fresh AA batteries 1 Connect the 500 interface to your computer with the supplied cables Follow the connections instructions provided with the 500 interface and or installation instructions in
6. e a pe 1 foot ot eoet Go in in ri bee E ban 5 S T ea aa oe ae ot 2 feet and in gt K Times 12 14 16 Determining Total Water Output in a Stream Bed Use the equation output average flow rate x area to determine the total water output in a stream bed Field Procedure 1 With a measuring tape or other device measure the width of the steam bed Record the stream width in meters on a piece of paper 2 With the Flow Sensor measurement scale take depth measurements in meters at equally spaced intervals across the stream For an accurate depth measurement submerge the sensor until the propeller housing rests on the bottom of the stream bed Keep the pole vertical Record each depth measurement on a piece of paper 3 With the Flow Rate Sensor connected to a 500 Science Workshop interface take a flow rate measurement in m s for each of the intervals Be sure to take a separate data run for each measurement Estimating the total water output 1 Calculate the cross sectional area of the stream Multiply each interval width by each depth you measured to calculate the area for each interval then add the areas for each of the intervals to obtain the total cross sectional area of the stream Note The more intervals you use the closer your approximation of the area will be to the actual area 2 Connect the interface to your computer Open DataStudio and retrieve your
7. quired Flow Rate Sensor CI 6730A Science Workshop 500 interface DataStudio software a set of four AA batteries pad of paper and pencil Note Calibration of the Flow Rate Sensor is not required 1 Plug the Flow Rate Sensor into a 500 Science Workshop interface and set up your experiment in DataStudio then disconnect the 500 interface from your computer 2 Near the shore of a stream bed insert the propeller of the Flow Rate Sensor about 2 inches below the surface of a moving stream Hold the pole vertically and keep the propeller housing steady 3 On the 500 interface press the LOG button to take a reading To end data collection press the LOG button again 4 On a piece of paper draw a diagram of the stream and shoreline With a pencil mark a point on the stream diagram to indicate where you took the measurement 5 Repeat steps 2 4 at different locations and depths as follows a near the shoreline at one foot b midstream at one foot c midstream at two feet and d midstream at three feet 6 Reconnect the 500 to your computer Use the Connect button on the main toolbar to retrieve data into DataStudio 7 In DataStudio compare the flow rate at the different depth increments and or different locations Is the flow rate higher midstream or near the shore What effect might depth have on the flow rate PASC ON screntific Flow Rate Sensor Sample Data tte eo Peete Pe we ba clita a Oa ve o sooth
8. velocities around gt 1 m s a sample rate of 2 samples sec is recommended e When taking a reading keep the handle steady e If the flow rate reading suddenly falls to zero midstream check the propeller for debris When sand or other particles become lodged in the propeller the propeller stops turning and the reading drops to zero e Erratic readings may occur with turbulent water flow If measuring flow from a stream or creek keep the housing in a stable position away from rocks and turbulence If measuring in low depths you can rest the housing on the stream bed for a more stable reading e Donotconnect the propeller housing to pipes or other tubing e When not using the Flow Rate Sensor store the sensor in a dry environment to avoid corrosion If necessary periodically lubricate the propeller with siliconeoil PASC ON scientific 012 08624A e If using the Flow Rate Sensor from a boat tether the boat such that the boat does not move during measurements Boat movement may interfere with an accurate flow rate measurement gt Note The instruction sheet has been written with the assumption that the user has a basic familiarity with DataStudio Users can gain basic skills with DataStudio by doing the tutorial in the DataStudio CD ROM For more information on datalogging with the 500 interface see Remote Data Logging in the table of contents of the DataStudio online help Flow Rate Activity Equipment re
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