PASCO Specialty & Mfg. PS-2222 User's Manual
Contents
1. trademarks or registered trademarks of PASCO scientific in the United States and or in other countries For more information visit www pasco com legal Product End of Life Disposal Instructions This electronic product is subject to disposal and recycling regulations that vary by country and region It is your responsibility to recycle your electronic equipment per your local environmental laws and regulations to ensure that it will be recycled in a manner that protects human health and the environment To find out where you can drop off your waste equipment for recycling please contact your local waste recycle disposal service or the place where you pur chased the product The European Union WEEE Waste Electronic and Electrical Equipment symbol to the right and on the product or its packaging indicates that this product must not be disposed of in a standard waste container 8 PASC Cm2. Instruction Sheet pasforl 012 12917A General Flow Sensor PS 2222 PS 2222 General Flow Sensor Low Pressure Tube Threaded Hole 1 4 20 High Pressure Luer Plug Tube Female Luer Barb Male General Flow Sensor PS 2222 PASPORT Sensor Extension Cable PS 2500 PASCO Data Acquisition Sofware See the PASCO catalog or the PASCO web site at www pasco com for more information Accessories used with the sensor Accessories used with the sensor ME 2220 Venturi Tube ME 2221 Pitot Tube ME 2224 Pressure Tap Cl 9874 Sensor Handles 4 Pack J A I f M 8 1 916 786 3800 800 772 8700 a support pasco com www pasco com Model No PS 2222 Product Description Product Description The PS 2222 General Flow Sensor is a versatile device for measuring differential pressure in air or water It mea sures the difference in pressure between the two input tubes The PASCO General Flow Sensor is designed to work with the ME 2220 Venturi Tube or the ME 2221 Pitot Tube The Venturi Tube and Pitot Tube attach to the General Flow Sensor by way of a flexible twin tube hose The connectors on the sensor are reversed from the connectors on the Venturi Tube and Pitot Tube so that they cannot be attached incorrectly Using the PASCO data acquisition software the user can select which device is attached to the sensor and what fluid air or water is flowing through the device Once these selections are made the se
3. f the General Flow Sensor Connect the Sensor Connect tubes from either the Venturi Tube ME 2220 or the Pitot Tube ME 2221 to the General Flow Sensor Be sure that connections are sealed prior to the introduction of any liquids to the system Plug the General Flow Sensor PS 2222 into a PASPORT input port on a PASPORT compatible interface and turn on the interface Check the PASCO web site for compatible interfaces If you are using a computer make sure that the interface is connected to the computer and turned on Prepare the PASCO Capstone Data Acquisition Software Hardware Setup Interface icon a eases sso unensatvnenrace o JE oR Fed Fe e Inthe PASCO Capstone software click the Hardware Setup icon in the Tools palette to open the Hardware Setup panel Confirm that the General Flow Sensor icon appears with the interface s icon a General Flow Sensor icon Hardware Setup Panels General Flow Sensor PS 2222 e Click the Data Summary icon in the Tools palette to open the Data Summary panel The panel lists the sensor s measure ments for example Differential Pressure Diff Press kPa Data Summary A f u n Sensor Data Summary a General Flow Sensor Diff Press kPa e To select the units of measure or make other changes to the measurement properties select the parameter in the Sensor Data Summary panel and then click the Properties icon shaped like a gear to open t
4. grees C This implies accuracy within 1 25 kPa Better accuracy may be attained by doing a calibration of the sensor at the temperature of use and maintaining the sensor in a sta ble position PASC Ci 3 General Flow Sensor Critical Use Considerations For low flow Venturi measurements at a rate of 1 standard cubic foot per minute SCFM the measured value of Ps was approximately 11 pascals Pa and the theoretical P was 6 Pa These are uncorrected values with a baseline noise level of approximately 3 Pa Repeatability is excellent with a variation within the noise band Item Value Range 0 to 50 kPa Differential Pressure Accuracy 2 5 of Full Scale at 50 kPa Venturi Tube in Water 2 1 gallons per minute gpm Venturi Tube in Air 2 5 scfm Repeatability 0 25 of Full Scale at 50 kPa Resolution 0 02 of Full Scale General Flow Sensor with the Venturi Tube and Pitot Tube Item Value with Venturi Tube Value with Pitot Tube Range Water 0 to 0 00530 m s 0 to 84 gpm 0 to 9 98 m s 0 to 22 3 miles per hour Range Air 0 to 0 0488 m s 0 to 773 gpm 0 to 92 1 m s 0 to 206 mph Critical Use Considerations Maximum Operating Pressure Do not subject the sensor to gauge pressures greater than 29 pounds per square inch psi or 200 kilopascals kPa as permanent damage will occur Do not use the sensor to measure flow in systems pressurized to more than 29 psi No
5. he Properties panel To change units click Names and Symbols Both metric and non metric Pitot Speed m s Venturi Volumetric Flow Rate L s v Clock Time s units are selectable Data Summary Panel Properties e In the event that a fluid other than air or water is used input appropriate values for density in the user input values in the PASCO Capstone software x Names and Symbols Default Measurement Name Measurement Type Measurement Name Short Name Variable Symbol Default Units y Numerical Format Number Style Fixed Decimals Allow Scientific Notation Thresl es gt Scientific Notation Thresholds 4 7 Allow Zero Level Thresholds iz 0 000000 Sensor Measurement Properties Zero Level Thresholds Set Up a Data Display e Set up a data display For example drag the Graph icon from the Displays palette onto the workbook page or dou ble click the icon to create a Graph display Create a Graph display PASC Ci 5 General Flow Sensor Critical Use Considerations e Set up the Graph display to show one of the sensor s measurements on the vertical axis For example click the Select Measurement menu button on the vertical axis and pick Diff Press kPa from the menu Time s automatically shows on the horizontal axis a mmr Oo E T E y 3 General Flow Sensor Zeroing the Sensor Prior to measurement the sensor should be placed in its operati
6. locity Relationship e Pump Delivery Studies Measure fluid velocity as a function of pump speed and working head e Measurement of Velocity and Pressure Losses in Piping Networks when used with the PS 2107 Absolute Pressure Sensor and the ME 2224 Pressure Tap e Measurement of Velocity and Pressure Losses in Valves when used with the PS 2107 Absolute Pressure Sensor and the ME 2224 Pressure Tap PASC Ci 7 General Flow Sensor Suggested Laboratory Activities Technical Support For assistance with any PASCO product contact PASCO at Address PASCO scientific Web WWww pasco com 10101 Foothills Blvd Roseville CA 95747 7100 Phone 1 916 786 3800 worldwide Email support pasco com 800 772 8700 U S For the latest information about the General Flow Sensor visit the PASCO web site at www pasco com and enter PS 2222 in the Search window Limited Warranty For a description of the product warranty see the PASCO catalog Copyright The PASCO scientific Instruction Sheet is copyrighted with all rights reserved Permission is granted to non profit educational institutions for reproduction of any part of this manual providing the reproductions are used only in their laboratories and classrooms and are not sold for profit Reproduction under any other circumstances without the written consent of PASCO scientific is prohibited Trademarks PASCO PASCO Cap stone PASPORT SPARK Science Learning System SPARK SLS and SPARKvue are
7. nsor provides the pres sure and the calculated values for flow velocity or volumetric flow assuming standard temperature and pres sure The units of measure are selectable as metric or non metric Venturi Tube ME 2220 Slip Joint Flow Direction _ 4 2 The General Flow Sensor Inlet area 3 44 x 10 m measures the fluid pressure in High Pressure Throat area 1 24 x 104 m two areas of different diame Tube ter and calculates the speed Slip Joint Hose Length is 3 from the difference in pres feet 0 91 m sure Low Pressure The Venturi Tube is designed Tube to be used with standard 3 4 inch 1 91 cm diameter poly vinyl chloride PVC pipe The inlet cross sectional area of the Venturi Tube is 3 44 x 104 m 3 44 cm and the throat cross sectional area is 1 24 x 104 m 1 24 cm ME 2220 Venturi Tube The plastic used in the Venturi Tube is compatible with standard PVC glues and it is recommended that it be glued into a piping network to measure flow rates Alternatively the Venturi Tube may be temporarily placed in a piping network using tape The hose length is three feet 0 91 m PASC Ci 2 Model No PS 2222 Product Description Pitot Tube ME 2221 Flow oe The Pitot Tube is designed to measure flow veloc Direction ity in open channels The Pitot Tube has a detach able handle attached to a 1 4 20 nut The overall hose length is 6 feet 1 82 m The tube with the male luer plug is f
8. onal position any fluids to be used should be introduced to the system and hoses should be restrained Immediately prior to a data run the unit should be zeroed using the Diff Press kPa PASCO Capstone software zero function Zero drift can occur due to tempera Pitot Air m s ture position or hose placement changes Venturi Air SPARK vue Setup e When SPARKvue starts up it shows the Home Screen for a moment and then shows a screen that lists the parameters for the General Flow Sensor such as Diff Press in psi Pa and in of Hg Fiii G SPARK SLS screen for the General Flow Sensor e Select a parameter to display on a graph For example touch Diff Press psi and then touch Show A graph display of Diff Press psi versus Time s opens Example Touch Diff Press and then touch Show gt Prem T A e Touch the Start button to begin recording data e Touch the Stop Ca button to end data recording SETUP For more information on setting up the data acquisition software and recording data refer to the User s Guide and the online help for the software 20 00 00 0 f Pevodc 10He Be Graph Display 6 PASC Cm Model No PS 2222 Suggested Laboratory Activities Xplorer GLX Setup Make sure that the Xplorer GLX is turned on and insert the General Flow Sensor into one of the PASPORT input ports at the top of the GLX e Inthe GLX Home screen use
9. or low pressure measurement and the other tube is for high pressure measurement Static Taps evenly spaced around circumference Static Taps fishes A Handle F i F Stagnation i P i an H Hp Low Pressure High Pressure T Tube AF AHi ube Overall hose length is 6 feet 1 82 m ToS A pe Luer Plug Male o Sensor jj ME 2221 Pitot Tube Quick Start e Plug the General Flow Sensor into one of the PASPORT interac input ports of a PASCO interface such as the 850 Universal ati SO UNVERSAL INTERFACE Interface Xplorer GLX or SPARK Science Learning Sys ie nput Por tem Or connect the sensor to the PASPORT Sensor Exten sion Cable and then connect the cable to an input port a e Connect an accessory such as the ME 2220 Venturi Tube or ie I the ME 2221 Pitot Tube to the General Flow Sensor SOS a e Start the PASCO data acquisition software such as PASCO Capstone Select the type of fluid air or water Set up a data display in the software e Click Record 9 press the gt button on the GLX or touch Start gt to begin recording data SETUP For more information on setting up the software and recording data refer to the end of this document or the User s Guide and online help for the data acquisition software Specifications The pressure sensing element used in this sensor will provide accuracy of 2 5 of the full scale reading 50 kilopascal at temperatures between 0 and 85 de
10. te that municipal water systems normally exceed this value Maximum Differential Pressure The maximum differential operating pressure between the high pressure and low pressure input is 7 25 psi or 50 kPa Differential pressures greater than 7 25 psi may result in permanent damage to the sensor causing inaccu rate measurement High Pressure Low Pressure Reversal Operation of the sensor with reversed pressure applied the pressure applied to the low pressure port is higher than the pressure applied to the high pressure port may result in permanent damage to the sensor Changing Fluid Use Care must be taken when changing from measurement in liquids to measurement in gases It is normal for small amounts of liquid to migrate into the hoses during use This may be minimized by insuring that the hoses are tightly attached to the sensor prior to introducing liquids to the system The large diameter of the venturi and pitot tube hoses minimizes capillary flow Placing a high point in the hoses above the fluid level in the systems will also help limit fluid migration After fluid use hoses from the Venturi or Pitot Tube should be carefully blown clear of any migrated fluid and dried prior to use measuring a gas such as air Fluid left in the line may obstruct flow causing inaccurate measure ment Fluid may also vaporize during use causing inaccurate measurement of flow 4 PASC Cm Model No PS 2222 Critical Use Considerations Setup and Use o
11. the cursor buttons to highlight Sensors ggqq7am oana Oee oe and then press the Checkmark button es Data Files igi Meter Stopwatch Settings AL Calculator EEA e Inthe General Flow Sensor screen use the Up and Down cursor somam onan Pe Gone buttons to select a choice such as Pitot Air and then press the Checkmark button to change the selection from Visible to Not Vis General Flow Sensor ible or vice versa Reduce Smooth Averaging Off 25 Diff Press Visible Pitot Air isible 2 Venturi Air Not Visible v v v v Vv 9 52 28 AM 01 31 13 XplorerGLx gj hoe e Press the Home button to return to the Home screen and use the cur sor buttons to select a display Press the Checkmark button to open T gt C7 Q your display choice Data Files Meter Stopwatch RN FO 112 Care ee Bo N Timing Settings After use with fluids care should be taken to remove all fluid from the left A hoses that attach the sensor to the Venturi Tube or the Pitot Tube Fluids ets in the hoses may migrate into the sensor and cause damage over time Graph Suggested Laboratory Activities Visit the PASCO Web site at www pasco com and enter PS 2222 in the Search window Click the User Resources tab to see the Downloads menu for the downloadable suggested activity write ups Activities may be similar to the following e Derivation of the Venturi Pressure Ve
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