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Uson SPRINT LC Owner's Manual

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SPRINT LC
MULTI-AIR TESTER
Owner's
Guide

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Summary of Contents for Uson SPRINT LC

  • Page 1 Uson SPRINT LC MULTI-AIR TESTER Owner’s Guide...
  • Page 3 Trademarks Trademarked names may appear in this manual for purposes of explaining the capabilities of the Sprint LC tester. Such use is intended to benefit the trademark owners. There is no intention to infringe on such trademarked names in any way.

  • Page 4: Table Of Contents

    Switches and Buttons..........30 Setup Menus............34 Navigation..............36 Parameters Menu ..........39 Test Pressure – Setting...........40 Coupling..............42 Test Params – Sub-Parameter Menu .....47 Vacuum Testing .............53 How Sprint LC Works ...........54 Connections............60 Run Display ............62 Units of Measure............68 Serial Port...............70 Input/Output............86 Page 4...

  • Page 5: Table Of Contents

    Programming Pressure Decay Testing..........90 Occlusion Testing ..........106 Flow Testing ............112 Burst Testing............124 Creep Testing (subset of Burst) ......130 Engineering Calibration: Get Ready ........135 Multi-Channel Calibrations .........136 Calibration Access ..........138 Pressure Calibration ..........140 Flow Calibration ..........144 Timer Verification ..........152 Engineering Data ..........153 Physical Laws ............154 Appendices (Optional Features)
  • Page 6 Safety Follow established safety guidelines about how to install, operate, and maintain electrical test equipment. In addition, Uson recommends observing the specific guidelines below when working with the Sprint LC air tester. Wear eye protection when working with compressed gas.

  • Page 7: Quick Start

    Quick Start This section is for Sprint LC owners familiar with the controls and operation of the tester. If any of the concepts presented here are unfamiliar, start with the section called Full Setup. Fast Setup Connect clean, dry supply air.
  • Page 8 Keypads ENTER/BACK PREVIOUS NEXT INCREMENT DECREMENT FIGURE 1 Number Accelerator keypad becomes Accel (Accelerate) when ENTER/BACK keypads are held. Tap ACCEL INCREMENT DECREMENT to make values change quickly forward or backward. Start Switch Keyswitch LOCKOUT FIGURE 2 Page 8...

  • Page 9: Front Panel Controls

    Front Panel Controls Enter a selection or go back. It also acts to accelerate ENTER/BACK functions. In run INCREMENT DECREMENT mode, this keypad accesses the run mode functions menu. Go to the previous menu item. In run mode, PREVIOUS increments the current test when held for three seconds.

  • Page 10: Back Components

    Back Component Layout FIGURE 4 Page 10...
  • Page 11 . Adjust this control to get the best visibility on Contrast Adjustment the liquid crystal display. . This is a connection for interfacing Sprint LC to Serial Output computers or printers. . Use this control to set tone volume, which affects Tone Adjustment both key-press and alarm tone.

  • Page 12: Run Display

    Each message that can appear in the status box is explained on pages 14 and 15. Display Contrast Remember to set the contrast on the back of Sprint LC to get the best visibility on the liquid crystal display. Page 12...
  • Page 13 Run Display – Overview Sprint LC shows the run display during all test cycles in every test mode. If multiple programs are linked, Sprint LC shows the run display for the program currently running. More information about each item on the run display is in the section.

  • Page 14: Status Box Messages

    Status Box Messages The status box on the run display shows information before, during, and after a test. Three kinds of facts are displayed in the status box—test type set to run, test phase, and results of the completed test. Test Mode Status These messages appear before a test is started.
  • Page 15 Test Results Status These messages appear at the end of test to tell operators whether a test passed or why a test was unsuccessful. PASS The product stayed within all test parameters of each test that was run. ABORT The start button was pressed, ending the test. P ERR Test pressure was above or below the pressure error tolerance set in the parameters menu.

  • Page 16: Decision Lights

    Alert Tone The alert tone (set with the volume control on the back of the Sprint LC) turns on for five seconds whenever the fail light turns on. If the tone volume is turned completely down, the operator won’t hear an alert.

  • Page 17: Key Commands

    Key Commands Re-Test If Sprint LC says there’s a product failure, operators can re-test the product by pressing the keypad. Re-test works only if the last INCREMENT test failed. Operators can’t re-test a part that has passed. If the operator re- tests a failed product, the tested counter does not advance.

  • Page 18: Test Parameters

    When Test Parameters are Available If there are existing test values, it is simply a matter of entering those values into the Sprint LC. Once all values are set correctly, the Sprint LC is either ready to use or ready for fine tuning.
  • Page 19 Choose the Desired Engineering Units Set units of measure before going to the parameters menu. Sprint LC allows programming in units most familiar to the user, and then switch to different units of measure for operation. Sprint LC handles all conversions automatically. Page 19...
  • Page 20 Put Sprint LC to Work When everything is programmed and checked out, Sprint LC is ready to work and start testing products. A few tips: Explain controls and run display messages to operators.
  • Page 21 If there is difficulty setting up the Sprint LC, please read this guide completely. Many “problems” can be solved with a few minor adjustments to the tester. Try the items on this checklist first. If all else fails, call Uson for help.

  • Page 22: Air Supply

    Particulate Filter Step Down Sprint LC Regulator FIGURE 7 How to Have Clean, Dry Air External pressure regulators and air filters are available from Uson. Call for free help in getting the air supply clean, dry, and regulated. Page 22...

  • Page 23: Full Setup

    Check the calibration certificate to determine the maximum pressure range of the Sprint LC. Supply air is connected to the 1/8-inch female NPT bulkhead labeled Air Supply on the back of the Sprint LC. See Figure 4 on page 10.
  • Page 24 Testers with Optional Features Sprint LC-PFB discussed in this guide is the starting point for many variations of air testers. A Sprint LC machine could be a base Sprint LC- PO with fewer features, or have a combination of several options.
  • Page 25 Sprint LC offers extreme flexibility for testing diverse products using various test types and techniques. This Guide explains the most common features incorporated into a broad range of Sprint LC testers. It is unlikely that any particular tester will have all test types and features discussed in this guide.
  • Page 26 Single Channel, Multi-Parameter Sprint The base model Sprint LC-PO has a single test port and can only do pressure decay testing. The LC-PFB has multiple test types available, but all tests are still done through one test port. The tests can be linked together in a sequence or performed one at a time.
  • Page 27 START AC Power Plug the AC power cord into the AC receptacle. After all air and electrical connections are in place, power up Sprint LC with the power switch on the back of the tester. 1 (top position) is on.
  • Page 28 PRESSURE DECAY, OCCLUSION LC tester, please obtain the serial number and revision level of the COMPANY NAME SERIAL NUMBER: 12345-1S firmware before contacting Uson. This information will help Uson technicians to provide the most effective help. Any button to continue... Figure 9...
  • Page 29 Run Mode Functions Menu From run mode, it is possible to access the Run Mode Functions menu. This menu allows changing the current program, printing a program header, printing a test summary or clearing the counters. Exit Highlight and press keypad to return to the run display.

  • Page 30: Setup Menu

    Sprint LC operation from LOCKOUT run to program mode. Turn the key to the vertical position to access programming functions. Only when Sprint LC is in program mode is it possible to set test parameters, measurement units, perform calibration, and configure the RS-232 communication port.
  • Page 31 By pressing and holding the down arrow keypad the current program number is decremented. Release the keypad when the desired program is displayed. Re-Test If Sprint LC says there is a product failure, operators can re-test the product by pressing the keypad. Re-test works only if the last INCREMENT test failed.
  • Page 32 ENTER / BACK In run— Enters the run mode function display. In program— Press to accept a selection or go back. It also acts to accelerate the increment and decrement functions. The function bar at the bottom of the display indicates what action the keypads have when pressed.
  • Page 33 Keypads What each keypad does depends on whether Sprint LC is run or program mode. This chart lists all keypad functions. The function bar at the bottom of the display shows what action the keypads have when pressed. Key-Press Tone Volume Increase or decrease key-press tone by adjusting the volume control on the back of the Sprint LC.

  • Page 34: Setup Menus

    Calibration, and Serial Port. A brief description of the setup menus follows. Test Parameters Menu The test parameters menu is the heart of Sprint LC operations. This is where is entered all information that tells Sprint LC how to decide whether a product under test is accepted or rejected.

  • Page 35: Calibration Menu

    This is where to set criteria for RS-232 communications. It is possible to set baud rate, number of data bits, and number of stop bits. Information sent from the Sprint LC serial port: Cycle number from the tested box Program number Test type (pressure decay, occlusion, flow or burst.)

  • Page 36: Navigation

    This is much more straightforward than any other tester of equivalent sophistication Press keypads shown on the map to reach various setup menus & functions. SPRINT LC SET-UP Test Parameters Units Calibration...
  • Page 37 Test Parameters Program 1-99 Test Type Test Pressure Press. Error Coupling GoTo Time On/Off (Up to three couplings may be available) Test Params GoTo (Test Parameters based on test type) Next Program Units Pressure Volume Flow Volume Flow Time Calibration Pressure Flow Time...
  • Page 38 Parameters Menu The main parameters menu contains all the variables and menus needed to establish one program. The menu is identical for all test types unless special options or multiple channels are installed. In such cases, added parameter lines may be present on the Main Parameters menu. Sequential testers have an added line to select the active channel.

  • Page 39: Parameters Menu

    Immediately after the INCREMENT keypad is pressed, Sprint LC opens the valve that directs INCREMENT pressure to the test port. Adjust the regulator on the back until the desired test pressure is displayed on the Test Press. Parameter line.
  • Page 40 Setting Test Pressure Test pressure is the only parameter requiring connection to supply air before the value can be set. Test pressure must be set for every test type. Regardless of the test type, test pressure is set in the same way so the setup explained here covers all situations.
  • Page 41 Parameters Menu (Continued) Adjust the regulator to set test pressure for each test program to use. PROGRAM 1 Test Type Test Press. 14.999 psig PORT Press. Error .5 psig THEN Coupling GoTo PUSH Test Params GoTo INC. Next Program ADJ. Figure 16 Cap the Test Port The test port is usually capped when setting...

  • Page 42: Coupling

    Press. Error (Figure 41 on page 94) Enter one number in pressure units and Sprint LC sets both the high and low pressure error values. In a pressure decay test, Sprint LC monitors pressure error during the fill and stabilization phases of a pressure decay leak test.
  • Page 43 When off the coupling port is vented to atmosphere. When active it supplies pilot pressure. If ordered with a 4-way valve, Sprint LC will have both normally open and normally closed connections. The normally open connection will operate in reverse.
  • Page 44 The occlusion release option is available only in testers that have the occlusion test capability. Occlusion release is used to open a product to atmosphere during the test phase. This allows Sprint LC to read the gross pressure drop expected on products that have no obstruction.
  • Page 45 Multiple Coupling Valves The standard Sprint LC does not come with a coupling valve, but the coupling menu is available on all Sprint LCs. Sprint LC can be ordered with up to three (3) coupling valves. If the machine has more than one (1)
  • Page 46 Prex or FasTest seals connect air pressure to the bottom of the product. Uncoupling AFTER the test is finished, Sprint LC uncouples in the reverse order set in the coupling menu. FasTest seals disconnect air pressure from the bottom of the product.
  • Page 47 Test Params – Sub-Parameter Menu Sprint LC testers have one secondary menu used to set additional parameters for each test type. The word “GoTo” on the main parameter menu indicates that a sub-parameter menu is available. To access the test parameters pop-up menu, highlight the “Test Params”...
  • Page 48 “Test Params” line is highlighted and the GoTo keypad ) is pressed. This menu is used to set additional timers, reject INCREMENT levels, or special functions associated with each test type. General test parameters are described in the Sprint LC Owner’s Guide. PROGRAM PRESSURE DECAY TEST Test Type Flow Test Press.
  • Page 49 Use the keypads to set the time to INCREMENT DECREMENT zero. When time is set to zero, dump is turned off and Sprint LC will not activate the dump valve. TIME Use the keypads to select a specific INCREMENT DECREMENT time up to 999.9 seconds.
  • Page 50 Product Volume and Flow Rate To have Sprint LC calculate the leak rate in cubic centimeters per minute, it is only necessary to enter the internal volume of the product to be tested. During a test, Sprint LC measures the pressure drop, and calculates the leak rate in units of cubic centimeters per minute.
  • Page 51 Turn off flow rate calculation If the volume is set to zero, then Sprint LC does not convert the leak rate to cubic centimeters per minute. The test results remain in pressure decay. Testers with flow sensors do not have the Prod Volume parameter line because those testers read directly in flow units.
  • Page 52 Next Program The next program is the program that Sprint LC will link to if the product passed the test as established in the previous program or programs. It is important not to link a program to itself as an endless test loop results.

  • Page 53: Vacuum Testing

    Sprint LC. The vacuum level is set by adjusting this regulator on the back of Sprint LC. A venturi is best for test applications in which extreme vacuum levels are not needed (typically lower than 25 inches of mercury or 12.3 psig...

  • Page 54: How Sprint Lc Works

    How Sprint LC Works With the power to run different kinds of tests, Sprint LC is extremely versatile. Sprint LC runs these tests— Pressure Burst Occlusion Flow Decay Each test type can be set to operate in a variety of ways to run tests on all...
  • Page 55 The air is trapped inside the product and inside the internal test circuit of the Sprint LC. The pressure change from a stabilized pressure is monitored for a preset time interval. A pass light turns on if pressure stays above the decay tolerance entered into a program.
  • Page 56 Burst-A Burst-B Dump Valve #4 Valve #6 Valve #2 Flow Control Atmosphere FIGURE 22 Self-Contained Sprint LC has all valves and pneumatic components in one package to perform pressure decay, occlusion, flow, and burst testing, if so equipped. Page 56...
  • Page 57 Valves Sprint LC uses up to sixteen valves to control test actions. The tester can provide up to three coupling valves that can be used to control external test fixtures for clamping and sealing products during the test cycle. Valve List...
  • Page 58 Test Timing and Valve Action Typical Pressure Decay Test (example) Fill Stabilize Test Time Time Time Pressure Dump valve Pressure Pressure value decay valve decay valve is "tared" and opens to Time closes trapping atmosphere opens to fill Pressure Change air in test part.
  • Page 59 Timers Timers are set in tenths of seconds, and each timer can be set to a maximum of 999.9 seconds. Timers are adjustable for pressure decay, flow, and burst testing. Timers for each test type have identical functions for each test mode, yet the number of possible timers may vary with each test type as seen in this listing: Timers Used in Pressure Decay &...

  • Page 60: Connections

    The test port is 1/8 inch NPT and the coupling port a #10 X 32 pitch machine thread for connecting external fittings. (Your Sprint LC might have more or less ports and can be located on the front or back depending on the options selected.) The bulkhead labeled “1”...
  • Page 61 Typical connection for a closed product. The coupling port is capped off. Also used for flow testing through an open product. Part to be tested. Closed on back side. FIGURE 25 Typical connection for an open product when a sealing fixture is used to close the test circuit.
  • Page 62 The readout shows the amount of air flow when Sprint LC goes into test phase and holds the flow rate recorded at the end of test time. The last reading is held until START is pressed again to being a new test.
  • Page 63 Main digital readout PROGRAM during test. Test Press. Tested Reject 9.993 psig .003 psig TEST Mode Test Time Status PROGRAM Main digital readout after end of test. Test Press. Tested Reject 9.993 psig psig PASS Mode Test Time Status FIGURE 27 Value held on Main digital readout at end of test Pressure Decay...
  • Page 64 Main Digital Readout Multi Channel Testers Multi Channel testers divide the run display into 2, 3 or 4 sections depending on the number of channels or test ports. They show individual readings for each channel. Each of the individual channel displays follow the same format as described for the single channel testers.
  • Page 65 In fill phase, the bar graph shows the product being pressurized. Full-scale equals preset test pressure. This is the same in the stabilize time. Figure 29. At the beginning of test time, Sprint LC changes the resolution and the bar graph becomes a very high-resolution trend indicator. The full scale of the bar graph is the reject level set in the test parameters.
  • Page 66 Bar Graph in Flow Mode In flow mode, the bar graph’s full scale is approximately the maximum flow tolerance set in the parameters menu. A reading near full scale means product is flowing at or near maximum flow tolerance. A reading of near zero on the bar graph means little or no air is flowing through the product.
  • Page 67 They show individual bar graphs for each channel. Each of the individual bar graphs follow the same format as described previously for the single channel Sprint LC. They have a smaller scale but convey the same information for the associated channel. PROGRAM Test Press.

  • Page 68: Units Of Measure

    Units of Measure Sprint LC can display pressure, flow and time in several different engineering units—and the tester does all the conversions for you. Change from ml/sec to cc/hr without using a scientific calculator or a conversion chart. It is permitted to program in English units even though test results need to be displayed to operators in metric units.
  • Page 69 Sprint LC does not have a flow test then the flow units will not be available. When Sprint LC does not have a flow test available it provides the ENGINEERING UNITS option to calculate a flow rate (cc...

  • Page 70: Serial Port

    Sprint LC communicates with computers and peripherals over a standard RS-232 port by using any third-party communication program. Use the RS-232 port to transfer test data from Sprint LC to a personal computer or directly to a serial printer. Data transferred is in tab delimited ASCII format.
  • Page 71 Pressure Decay or Occlusion Data —Continued Pressure units Result at the end of test (P ERR, GROSS, LEAK, OCC, PASS or ABORT) Flow Data Cycle number from the Tested box Program number Test type (pressure decay, occlusion, flow, or burst.) Test value from the main digital readout Flow units Result at the end of test (OVR P, P ERR, LOW, HIGH, PASS or...
  • Page 72 Figure 33. Press to view the ENTER/BACK current settings. Follow prompts on the Serial Port Setup display to SPRINT LC SET-UP change serial port parameters. Test Parameters Units Baud Rate The baud rate can be set for speeds Calibration from 1200 to 19200.
  • Page 73 Connecting a Null Modem Cable Sprint Side Peripheral Side 25-pin connector that 25-pin connector on cable plugs into the port labeled end that plugs into a RS-232 IN on the back of computer or printer. Sprint. Transmit Receive Ground Pin 2 on Sprint goes to pin 3 on the peripheral. Pin 3 on Sprint goes to pin 2 on the peripheral.
  • Page 74 RS-232 port provided on the back of the Sprint LC tester. Typically, the RS-232 port is used to transfer test data from Sprint LC to a computer. Data transferred to the computer is in tab delimited ASCII text format.
  • Page 75 (TRM) Test Result Monitoring Software Uson’s Test Result Monitoring and Reporting software is a powerful tool for Sprint LC users. It has been specifically designed for use with the Sprint LC and Uson’s other test equipment. TRM’s reports, graphs and monitoring features make it possible to improve both product quality and the manufacturing process.
  • Page 76 • • match the Sprint LC. Start testing. The Sprint LC will automatically send the test results at the end of each test. Import the information into a spreadsheet program for analysis. At the end of each test, the test results are shown on the computer display.

  • Page 77: Troubleshooting

    Programming the RS-232 port is described in the section on RS-232 in the Sprint LC Owner’s Guide. Baud Rate Make sure the baud rate set on the Sprint LC matches the baud rate established in the communication program on the host. Data Bits Set Sprint LC to either 7 or 8 data bits to match your communication program.
  • Page 78 Reports & Data Logging Sprint provides reports that can be sent to a computer or printer via Sprint’s RS-232 port. The reports also include a data logging function and a summary of the counter statistics. The reports are divided into the three sections described below.
  • Page 79 Report Example ************************************************************************** TESTER # 12345-1S SET-UP PARAMETERS PROGRAM 1 TEST TYPE: PD Test Press 10.000 Press Error : .500 Coupling Timer 1 Parameter List Hold/Fail Fill Time Stab Time Test Time Dump AUTO Next Program Reject Level : .050 Result Heading Product Vol **************************************************************************...
  • Page 80 Start Data Logging Press the keypad while the tester is idle in run mode to enter ENTER/BACK the Run Mode Functions menu. Select Print Header and press ENTER/BACK to get a report header at the start of a report. The test result data are automatically sent to the RS-232 port.
  • Page 81 Example Parameter List and Test Result Heading ************************************************************************** TESTER # 12345-1S SET-UP PARAMETERS PROGRAM 1 TEST TYPE: PD Test Press 10.000 Press Error : .500 Coupling Timer 1 Hold/Fail Fill Time Stab Time Test Time Dump AUTO Next Program Reject Level : .050 Product Vol **************************************************************************...
  • Page 82 Test Result Report The Test Results report is sent automatically at the conclusion of each test. There is no need to press any keypad to send a serial string via the RS-232 port. A sample Test Result report is shown below. The number in the column under “cycle”...
  • Page 83 A partial list of error messages appears on the following page. These error messages apply to all Sprint LC testers. Test result messages appear in the status box on the run display. These test result messages are the same as those in the Result column of the serial string output.
  • Page 84 Explanation of Test Result Messages PASS The product stayed within all test parameters of each test that was run. ABORT The START switch was pressed, ending the test. P ERR (Pressure Error) The test pressure was above or below the pressure error window. GROSS The test pressure dropped below the pressure error limit during the stabilize time.
  • Page 85 Summary Report A Summary report can be obtained by pressing the keypad ENTER/BACK during run display to enter the Run Mode Functions menu. Select Print Summary and press ENTER/BACK The Summary report contains the program number, the total number of tests, the number of passes, and the number of rejects associated with the program number.

  • Page 86: Input/Output

    The I/O connector is typically used to connect Sprint LC to a programmable logic controller (PLC) or other automation equipment. The remote start signal tells Sprint LC to begin a test. Sprint LC has internal contacts that can be used to tell an external device that the test passed or failed, or that the test is completed.
  • Page 87 I/O Connector Pinout Test Over Fail 24V Remote Start Pass Standard 25 pin D-style connector FIGURE 36 Foot Switch Pinout Dry contact used to start Sprint LC FIGURE 37 Page 87...

  • Page 88: Programming

    Introduction Now you’re ready to enter times and limits into programs. Sprint LC comes with ninety-nine factory-installed programs with default parameters. Keep them or change them to suit the testing situation. Please note that not all test types are available in every tester.
  • Page 89 Suggestions When analyzing a product for the first time with a microprocessor- controlled tester such as a Sprint LC, it is often surprising to learn what could be happening in the product during a pressure or flow test—things that simply don’t show up on low-resolution equipment or in bubble tests.
  • Page 90 If the dump parameter is set to auto or a time, the dump valve vents the product to atmosphere and the coupling valve turns off. If another test is linked to the pressure decay test, Sprint LC goes to the next linked test in the series as long as the product passed all tests.
  • Page 91 Pressure Decay Parameters Parameters that must be set in a pressure decay test: Test Pressure Pressure Error Coupling Time Fill Time Stabilization Time Test Time Dump (auto, off or time) Reject Level (maximum decay) Product Volume (optional, to calculate cc/m) Next Program Coupling Timer Setup Time CP1...
  • Page 92 If the regulator is adjusted or inadvertently moved after psig the target test pressure is set, Sprint LC stops the test and shows P ERR in the status box on the run display. P ERR...
  • Page 93 Peak pressure Fill Stabilize Test Dump should be near the preset test pressure PROG Test Press. 9.993 psig TIME Zero FIGURE 40 When we talk about test pressure, we talk about two possible values— Preset Test Pressure is the pressure that was set using the pressure regulator on the rear panel.
  • Page 94 Pressure Error Window Fill Stabilize Test Dump (+ P ERR) Test Pressure (- P ERR) TIME Zero FIGURE 41 Positive Pressure Error Fill (+ P ERR) Test Pressure (- P ERR) TIME Zero FIGURE 42 Page 94...
  • Page 95 In a pressure decay test, the Press. Error is set as an equal plus and minus tolerance around a nominal test pressure value. Figure 41. Enter one number in pressure units and Sprint LC sets both the high and low pressure error values. Sprint LC monitors pressure error during the fill and stabilization phases of a pressure decay leak test.
  • Page 96 Timers in pressure decay tests Coupling Timer Coupling time is used as a delay causing Sprint LC to wait for a preset period after start is activated and before Sprint LC supplies air to the part to be tested. Coupling time can be used in either a manual or automated operation.
  • Page 97 Test Timer In a pressure decay test, test time is the period when Sprint LC takes measurements to determine the amount of pressure drop from a stabilized pressure. The instant the test enters test phase, Sprint LC takes the first pressure reading and stores this value P-1.
  • Page 98 Sprint LC uses the pressure drop to compare to the maximum allowable loss (known as the reject level) to decide whether a product is accepted as good or rejected as bad.
  • Page 99 Reject Level The reject level is the maximum pressure drop allowed in a product before a reject is triggered. The level is the difference between the actual test pressure (P-1) and the value entered in pressure units. If the pressure is equal to or greater than the reject level at the end of test phase, the product passes.
  • Page 100 Gross Leak A gross leak is detected when pressure drops below the negative pressure error PROGRAM during stabilization time. Figure 47. Press. Tested Reject 93 psig When a gross leak is detected, Sprint LC stops the test and shows GROSS in the status box on the run display.
  • Page 101 14.7 psig (1 atmosphere) when calculating the ccm rate. Turn off flow rate calculation If the volume is set to zero, then Sprint LC does not convert the leak rate to cubic centimeters per minute. The test results remain in pressure decay.
  • Page 102 Programming a Pressure Decay Test Follow these steps to program a pressure decay test— Turn the LOCKOUT keyswitch to program mode. Test Parameters is now highlighted on the setup menu. Press the keypad, then use the ENTER/BACK keypads to select the INCREMENT DECREMENT program number to edit.
  • Page 103 Programming a Pressure Decay Test (continued) keypad to highlight Coupling . Use the Press the keypad NEXT GoTo to enter the pop-up menu and set the values for coupling time. If there are no external fixtures connected to the coupling port, set it to OFF and the coupling time to zero seconds.
  • Page 104 NEXT INCREMENT keypads to set the value for test time. Test time is DECREMENT the amount of time Sprint LC takes readings to monitor the pressure drop. keypad to highlight Dump . Dump can be set to Press the NEXT Auto , Off , or a set time.
  • Page 105 Volume . Volume is only used Press the NEXT when the Sprint LC is to convert the pressure drop to a cc/m flow rate. If desiring test results in pressure decay, then leave this value at zero. Press to exit back to the main parameter menu.

  • Page 106: Occlusion Testing

    Occlusion Test (Blockage) How OCC works An occlusion test (also called a blockage test or a gross pressure loss test) is a method of testing in which pressure in an open product must drop below the reject level for a pass condition. Occlusion tests are generally used to evaluate products that have openings to check for potential blockages or obstructions of the flow path.
  • Page 107 Thanks to the commonality of test circuits, it is possible to conduct pressure decay tests followed by occlusion tests. This is easy to accomplish with the program linking ability of Sprint LC. Typically, a pressure decay test is conducted first, then open the product to atmosphere and conduct an occlusion test.
  • Page 108 If the dump parameter is set to auto or a time, the dump valve vents the product to atmosphere. If another test is linked to the occlusion test, Sprint LC goes to the next linked test in the series as long as the product passed all tests.
  • Page 109 Occlusion Test - Pass Couple Fill Stabilize Test Dump Pass – Pressure drops more than the reject level. Reject Level TIME Zero FIGURE 50 Test Time Occlusion Test Pass The figure above illustrates a typical occlusion test sequence when using a coupling valve to seal the open end of the product.
  • Page 110 If the dump parameter is set to Auto, or a time. The dump valve vents the product to atmosphere. If another test is linked to the occlusion test, Sprint LC goes to the next linked test in the series as long as the product passed all tests.
  • Page 111 Open Flow Occlusion Pass Pass - Pressure is within P ERR limits at the Fill Test end of the fill time, a “quick” occlusion test. (+ P ERR) Test Pressure (- P ERR) Reject Level The pressure must also drop more than the reject level during test time to pass.

  • Page 112: Flow Testing

    A flow test continuously supplies air to a product under test and measures the amount of air flowing through the product and going to atmosphere. In a flow test, Sprint LC uses at least one mass flow sensor to measure the air flow, and a pressure transducer to monitor the air pressure.
  • Page 113 Flow Test Parameters Parameters in a flow test— Test Pressure Pressure Error Coupling Time (if external fixtures are used) Fill Time (only required on large products) Test Time Dump (auto, off or time) Max Flow (maximum flow) Min Flow (minimum flow) Next Program Protect the Flow Sensor Do NOT run a flow test unless product is attached to...
  • Page 114 Figure 53. Pressure error is set by entering one pressure number. Sprint LC sets the positive and negative pressure error around the nominal test pressure.
  • Page 115 Press. Tested Reject above the maximum pressure error value, 93 psig Sprint LC stops the test and if dump is active, vents the air to atmosphere (Figure 55). Sprint LC displays P ERR in the status box on the run display.
  • Page 116 Figures 52 and 53. If both the pressure error and flow tolerance are exceeded during a test, Sprint LC shows P ERR in the status box because pressure error has priority over flow tolerance.
  • Page 117 Tested Reject 93 psig maximum flow setpoint at the end of test phase. Sprint LC turns on the reject light and shows HIGH in the status box on the run display. sccm If dump is active, the dump valve opens and pressure is vented to atmosphere.
  • Page 118 Leak Test Using Flow Sprint LC can be used to check for leaks using flow. When setting up this kind of test, set the minimum flow rate to zero. The maximum flow setting is then set to the maximum flow rate to accept. The exact flow rate depends on the product characteristics and specifications.
  • Page 119 Leak Test Using Flow Couple Fill Test Minimum flow setpoint is set to zero. Max Flow TIME Zero FIGURE 58 In a leak test using flow, there is the option of using fill time (shown in Figure 58) or going straight to test phase. Fill time is usually needed for large parts that need to fill with air before they start flowing.
  • Page 120 DECREMENT pressure error. Pressure error is how much overshoot or undershoot is allowed around the test pressure. Pressure error is needed to ensure the product reaches the correct pressure before Sprint LC takes flow readings. Press the keypad to highlight Coupling. Use the GoTo...
  • Page 121 Test time is DECREMENT the period when Sprint LC takes readings to measure air flow. The last reading made during test time is used to decide whether the test was a pass or fail.
  • Page 122 Programming a Flow Test (Continued) Press the keypad to highlight Max Flow. Maximum flow is NEXT the high setpoint Sprint LC uses to decide whether the test was a pass or fail. Use the keypads to set the INCREMENT DECREMENT value for maximum flow.
  • Page 123 Flow Sensor Over Pressure Limits The flow sensor in the Sprint LC can be damaged by too much pressure. The Sprint LC automatically monitors the pressure and will stop a flow test if the pressure is too high. The below table shows the maximum pressure associated with each flow range.

  • Page 124: Burst Testing

    Burst Testing In burst testing, Sprint LC looks for devices to open to atmosphere at some point during pressurization and rapidly drop toward zero pressure. When the burst occurs in the correct pressure range and time period, Sprint LC gives a pass indication. Figures 60 and 61. Test engineers often use a burst test to check pressure relief mechanisms designed to open within a preset pressure range.
  • Page 125 Burst Test Pass (event above minimum burst) Couple Test Max Burst Event Value Min Burst TIME Zero FIGURE 60 Burst Test Pass (event below minimum burst) Couple Test Max Burst Event Value Min Burst TIME Zero FIGURE 61 Page 125...
  • Page 126 The fail light turns on. Figure 62. If pressure goes above the maximum setpoint without the product bursting, Sprint LC stops the test and shows HIGH in the status box on the run display. Figure 67. The fail light turns on.
  • Page 127 Burst Test – Low Reject Couple Test Max Burst Min Burst Burst below minimum stops the test and the fail light turns on. TIME Zero FIGURE 62 Burst Test – High Reject No event, so test stops when pressure exceeds Couple Test maximum set point.
  • Page 128 INCREMENT DECREMENT value for the maximum test time. Test time is when Sprint LC takes readings to look for peak pressure burst and event. If there is no burst within this time, the tester will stop and fail the part as a no burst.
  • Page 129 Press the keypad to highlight Max Burst. Maximum burst is NEXT the high setpoint Sprint LC uses to decide whether the test was a pass or fail. Use the keypads to set the INCREMENT DECREMENT value for maximum burst pressure.
  • Page 130 Figure 68. Setting minimum and maximum setpoint to the same pressure causes Sprint LC to pass product reaching the min/max pressure setting. Products not reaching the min/max setpoint in the allowed test time are rejected. Figure 69. Products opening to atmosphere (bursting) before reaching the min/max setpoint are also rejected.
  • Page 131 Use the procedure on page 128-129 called Programming a Burst Test to enter values for a creep test. Everything is set the same way as a burst test except that that the min and max setpoints are set to the same pressure value.
  • Page 132 Creep Test—Continued Creep Test – Fail Couple Test Min and Max Burst below min/max stops the test and the fail light turns on. TIME Zero FIGURE 70 Figure 70 shows what would happen if PROGRAM the product failed before reaching the Press.
  • Page 133 Suggestions If the product has never been analyzed with a microprocessor-controlled tester such as a Sprint LC, it may be surprising to learn what is happening in the product during a pressure or flow test; things that are not apparent on low-resolution equipment or in bubble tests.

  • Page 134: Engineering

    Attaching Sprint LC to a fixed surface Uson recommends using the feet attaching threads when mounting Sprint LC to a surface or machine. The Sprint LC base has four #6 by 32 attachment points. The rubber feet are typically left on to act as a cushion.

  • Page 135: Calibration: Get Ready

    If Sprint LC is not due for a scheduled calibration, but it appears to have an accuracy problem, check all other possibilities and consult with Uson before starting a calibration. For example: - Verify or compare against a standard first before changing calibration data.

  • Page 136: Multi-Channel Calibrations

    (tests one port at a time) or concurrent (tests all ports at the same time) models. Multi-channel calibration works much the same as in a single channel Sprint LC. There are only a few special features and differences that are noted here. Other than these differences, follow the same procedures starting on page 138.
  • Page 137 Any of the test ports may be used for calibration as long as the remaining test ports are capped and leak tight. Air is sent out of the Sprint LC to supply a calibrated standard for comparison to the Sprint LC, same as in a single channel Sprint LC.

  • Page 138: Calibration Access

    Stop and Leave Calibration To quit proceeding with calibration, exit by pressing the ENTER/BACK keypad when the Exit Calibration line is highlighted. Sprint LC defaults to the Exit Calibration line. Proceed with Calibration To proceed with calibration, use the...
  • Page 139 Calibration Warning Message EXIT CALIBRATION ENTER CALIBRATION STOP - WARNING YOR ARE ABOUT TO CHANGE CALIBRATION Revision Level: 3.XX Serial Number: 12345-1S Enter Prev Next FIGURE 75 Calibration / Verify Menu Exit (“Flow Calibration” will not be present in testers Pressure Calibration without flow sensors.) Flow Calibration...

  • Page 140: Pressure Calibration

    SPRINT LC SET-UP Test Parameters Units Calibration Serial Port Enter Prev Next Help EXIT CALIBRATION Exit ENTER CALIBRATION Pressure Calibration Flow Calibration Time Verification STOP - WARNING YOR ARE ABOUT TO CHANGE CALIBRATION Revision Level: 3.XX Serial Number: 12345-1S Enter...
  • Page 141 When performing a pressure calibration, air is sent out of the Sprint LC to supply a calibrated external standard for comparison to the Sprint LC. First use the...
  • Page 142 10.00 10.000 15.00 15.000 Adjust the pressure regulator on Sprint LC to make the pressure standard match the target value on the calibration menu. Backward Calibration A common mistake is to match the pressure (accept the calibration pressure) by watching the “reading”...
  • Page 143 Procedure Access the flow calibration menu as shown in Figure 77 on page 140 The zero is set first, so ensure the air supply going to Sprint LC is disconnected and the pressure regulator knob is adjusted fully out (off). Press the...

  • Page 144: Flow Calibration

    SPRINT LC SET-UP Test Parameters Units Calibration Serial Port Enter Prev Next Help EXIT CALIBRATION Exit ENTER CALIBRATION Pressure Calibration Flow Calibration Time Verification STOP - WARNING YOR ARE ABOUT TO CHANGE CALIBRATION Revision Level: 3.XX Serial Number: 12345-1S Enter...
  • Page 145 Flow Calibration Setup Sprint LC uses a lookup table to establish flow transducer linearization. The zero point and multiple flow points along the range of the particular tester will be set. The exact flow calibration points in the scale are entered at the factory into the calibration menus.
  • Page 146 Standard Flow Master FIGURE 80 Caution Uson uses highly specialized instruments to calibrate the mass flow transducer. If the proper instruments with the necessary accuracy are not available, return the Sprint LC to Uson for recalibration when needed. Page 146...
  • Page 147 If pressure is over the maximum allowed for the flow sensor when first entering calibration, Sprint LC does not open the flow valves (to prevent sensor damage) and displays OVER in place of a pressure reading on the Pressure line at the bottom of the menu.
  • Page 148 Flow Calibration Example Using Flow Meter Sprint LC Flow Meter Flow Restrictor FIGURE 82 Figure 82 shows the setup for a flow calibration with a flow meter. The flow standard (meter) is connected downstream from a flow restricting device. Connections must be kept as short and direct as possible to get the best accuracy.
  • Page 149 LC should also read zero. If not, make sure your setup is correct. Press and hold the white START switch while momentarily pressing the keypad. The flow reading on Sprint LC ENTER/BACK should now read .00. Connect air pressure to the air input connector on the rear of the tester.
  • Page 150 If there is no access to a flow linearizer, use individual fixed restrictors. These are often used when calibrating Sprint LC at a single flow point. A single flow point calibration is sometimes acceptable when Sprint LC is used at just one flow rate or for a simple verification.
  • Page 151 Flow Calibration Using Certified Flow Master In this procedure, use a fixed restrictor, or flow linearizer, having known (certified) flow rates at various pressures. Access the flow calibration menu as shown in Figure 79 on page 144. The flow zero point is set first, so ensure the air supply to Sprint LC is disconnected and the pressure regulator knob is adjusted fully out (off).

  • Page 152: Timer Verification

    Time Verification The timer verification menu is used to check the accuracy of the internal time base. No adjustment is possible as this is a check to ensure Sprint LC agrees with a calibrated time standard. Use the INCREMENT keypads to set the target value. Maximum target value is 30 DECREMENT seconds.

  • Page 153: Engineering Data

    Converting pressure to flow rate. The leak rate can be determined in flow units (cubic centimeters per minute) based on the pressures (P-1 less P-2) measured by Sprint LC. In a pressure decay test, Sprint LC holds the pressure drop on the main digital readout: large numerals in the center of the LCD.
  • Page 154 Laws We present here an abbreviated history and overview of fundamental Laws dealing with pressure and flow measurement. Pressure In physics, pressure is a force measured in terms of its distribution over an area of an opposing force. This is expressed as force (F) divided by unit area (A) of the surface area to which the force is applied.
  • Page 155 Air Composition Our atmosphere is composed almost entirely of oxygen and nitrogen in their diatomic forms (two atoms bound together by chemical forces). Diatomic nitrogen makes up about 78% of the total molecules in the atmosphere. Diatomic oxygen represents nearly 21%. The inert noble gas, argon, accounts for about 0.9%, and the remaining 0.1% is composed of many trace gases, the most significant being carbon dioxide and water vapor.
  • Page 156 Fluids vs. Solids The distinguishing feature of a fluid (gas or liquid), in contrast to a solid, is how easily the fluid can be deformed. If a shearing force, even a very small force, is applied to a fluid, the fluid will move and continue to move as long as the shear acts on it.
  • Page 157 Fluid Flow—Real Fluids Equations concerning the flow of real fluids are complex. In turbulent flow, the equations are not completely known. Laminar flow is described by the Navier-Stokes equations, for which answers can be derived only in simple cases. Only by using large computers can answers be derived in more complex flow situations.
  • Page 158 Pascal’s Law In 1653, Blaise Pascal came up with the idea that in a fluid at rest, the pressure on any surface exerts a force perpendicular to the surface and independent of the direction or orientation of the surface. Any added pressure applied to the fluid is transmitted equally to every point in the fluid.
  • Page 159 Charles’s Law and Kelvin Temperature Charles’s observations led to the absolute (Kelvin) temperature scale, since the gas, according to the equation, would have zero volume at –273 degrees C. The absolute temperature scale was defined by Kelvin so that absolute temperature equals negative 273 degrees C and each absolute degree is the same size as a Celsius degree.
  • Page 160 Ideal vs. Real Gas Gases are typified as ideal or real. The ideal gas follows certain gas Laws exactly, whereas a real gas closely follows these Laws only at low density. Ideal behavior can be ascribed to a real gas if its molecules are separated by very large distances, so that intermolecular attraction is negligible.
  • Page 161 The electronic regulator replaces the manual regulator and the adjustment knob for the manual air regulator is removed from the rear panel of the Sprint LC. Test pressure is set using the setup parameters menu and the front keypads. The electronic regulator is used to establish test pressures in pressure decay and flow tests and can be used to establish the ramp rate in burst tests.
  • Page 162 Regulator Operation To set the test pressure, first highlight the “Test Pressure” line in the parameter setup menu, then press the keypads INCREMENT DECREMENT to set the desired test pressure value. See figure below. Air is NOT sent to the test port, as with a manual regulator machine, so it is not necessary to cap the test port when the electronic regulator option is used.
  • Page 163 If 10 psig is entered, pressure increases 10 psig every second until the end of the test time. If set to zero, Sprint LC goes directly to the set ramp start pressure and remains there. In Burst testing, pressure increases until a pressure drop is measured, indicating the part has opened (burst), or until time runs out.
  • Page 164 PROGRAM Burst Test Sub- Parameter BURST TEST Menu Using the Test Type Flow Electronic Regulator Test Press. Ramp Start 10.000 psig 3.000 psig Press. Error Ramp Rate .5 psig .8 psi/s Coupling Test Time GoTo 5.0 sec Dump AUTO Test Params GoTo Next Program Max Burst...
  • Page 165 With the electronic regulator Sprint LC will read the pressure and automatically adjust the output to reach the set test pressure. Setting Test Pressure...
  • Page 166 Uson recommends that no adjustment be made. As in a normal calibration, when performing a pressure calibration, air is sent OUT of the Sprint LC to supply a calibrated external standard for comparison to the Sprint LC.
  • Page 167 “Pressure ENTER/BACK Calibration” highlighted, Sprint LC opens the internal solenoid valve to supply air to the external pressure standard used for calibration. The menu below depicts the menu used to select the target values and to adjust the pressure supplied by the electronic regulator to the external pressure standard.
  • Page 168 Appendix B Fast Fill The Sprint LC tester described in this Appendix has an extra valve and regulator to help fill the part quickly. They can also be used to fill the part to a higher pressure to stress the part or to help reduce the stabilize time.
  • Page 169 As in the standard Sprint LC, there is an adjustment knob for the manual air regulator on the back of the Sprint LC. There is also a second regulator attached to the air input port on the back.
  • Page 170 Calibration Additional Manual Regulator with Please refer to the calibration section of the Sprint LC Owner’s Guide. This appendix describes only the differences when performing calibration on testers using the additional manual regulator. Two Channel Concurrent Sprint The calibration functions much the same as with a single regulator. The calibration for each test port (and sensor) is done independently in its own calibration menu.
  • Page 171 I/O Pinout Options The Sprint LC I/O has many options depending on the configuration of the Sprint LC. The number of test ports will affect the pinout of the I/O connector. The other two options that also affect the pinout are the Programmable Controller Interface (PCI) and the Binary Coded Decimal Program Select (BCD).
  • Page 172 Fail 2 Test Over Two Channel Concurrent Pass 2 with BCD General Fail 24V Remote Start Pass 1 24V BCD Bit 0 24V BCD Bit 1 24V BCD Bit 2 24V BCD Bit 3 FIGURE 93 BCD Program Select Input Table Program # Bit 0 Bit 1...
  • Page 173 Hold BCD Inputs High It is recommended that the inputs be held high until after the test is started. This will avoid a race condition when the inputs are turned off. If one of the inputs turns off before the others the selected program will change accordingly.
  • Page 174 Three and Four Channel Concurrent with BCD When a three or four channel concurrent Sprint LC has the BCD program select option, there are not enough outputs to allow a pass and a fail output for each channel. In this case a “General” fail output is used. It is active if any combination of the test ports fail.
  • Page 175 “:”. Start of String Character – # The start of string character is a pound sign, #. The Sprint LC watches for this character as an indication that a command is to follow. Serial Number – 54321-1S The first portion of the string is the serial number of the Sprint LC, including the dash.
  • Page 176 Command Code – ST The second portion of the string is the command code. Our example uses ST which is the start command. The table below -available commands. Function Code Description Start Start a test Retest Retest a failed test. (Doesn’t add to counter totals) Print Header Print the test parameters &...
  • Page 177 Appendix F Pass/Fail Jumps The Sprint LC tester described in this Appendix has additional control to link the test programs together based on either an accept or reject condition. This feature also adds the option to pause the test sequence between linked test programs.
  • Page 178 On Pass/Fail Pause The two pause lines determine if the test will continue automatically or pause and wait for an operator input before continuing. A pause can be a useful option. It can allow time for an operator action to be performed before the test continues.
  • Page 179 Parameters menu. Plot Interval The Sprint LC Test Parameter menu is modified to include a Plot Interval line. It may be set to OFF or 0.1 through 1.0 second. At the end of the test all of the stored values are reported through the serial port. The time interval selected determines how many values are recorded.
  • Page 180 In a concurrent Sprint LC data can be collected from only one channel or test port at a time. Below the Plot Interval line in a concurrent Sprint LC is a second new line. A Plot Channel line is added to select the channel to be plotted.
  • Page 181 Appendix H Program Names The Sprint LC tester described in this Appendix has an option to enter user defined alpha-numeric names for each test program. The names can identify the test to avoid confusion. For example a test might be identified by entering the model number of the part to be tested.
  • Page 182 Sprint LC Owner’s Guide on page 70 and 72. Connect the Sprint LC to a host computer and use a terminal program such as Window’s “Hyper Terminal” to open the serial port.
  • Page 183 Appendix I Crack Testing Crack testing is an optional test in which the Sprint LC is used to detect a slight opening or change in pressure. Crack testing is used in devices such as valves intended to open a certain pressure range. Because a crack is desired, a pass indication is given if the crack happens within established tolerances.
  • Page 184 Sprint LC. The Crack Event In a crack test Sprint LC is equipped with two sensors. The standard transducer measures the pressure rise being feed to the test part, on the upstream side. The second sensor is the downstream sensor. The crack event is a change in pressure or flow on the downstream side of the test part.
  • Page 185 Programming a Crack Test Use the procedure called Programming a Burst Test in the Sprint LC Owner’s Guide to enter values for a crack test. The parameters of a crack test are set in the same manner as a burst test. See page 128.
  • Page 186 Vent Delay Option Vent Delay is an optional feature that is associated with a crack test. It is only available if purchased. In some cases the downstream pressure, or flow through the part, may not start out at zero. This can be caused by the test fixture or the part itself.
  • Page 187 Appendix J Start Options The Sprint LC has options that modify the way it accepts the start input. These options are useful for integrating the Sprint LC with fixtures that seal on the test part. The start options are mutually exclusive. Only one option, (or the “standard”...
  • Page 188 Sprint LC. It requires that two switches be pressed at the same time before it will send a start signal to Sprint LC. It is more than just two switches. It requires that both are pressed at the same time so that one switch can not be “tied down”...
  • Page 189 Appendix K Real Time Clock The Sprint LC tester described in this Appendix has an option to add a time stamp to the serial port output. The real time clock option adds a date/time stamp to the test result report. It records when each test is performed.
  • Page 190 Appendix 30...
  • Page 191 Alert Tone: The alert tone turns on for five seconds whenever the fail light goes on. The loudness of the tone is set with the volume control on Sprint LC’s back. If turned completely down, no tone is audible. Page 16 Atmosphere (1): In this guide, atmosphere means room air pressure.
  • Page 192 Page 13-15, 84 Bulkhead Fitting: A connection passing through a panel or enclosure. One bulkhead on the back of Sprint LC is used for connecting the air supply to the tester. Two bulkheads on the front are used for test and coupling ports.
  • Page 193 See Sequential Contrast: The contrast of the LCD can be adjusted for the best viewing. It is adjusted with the contrast knob on the back of Sprint LC. Page 11, 12 Counters: Sprint LC records the total number of tests performed (both pass and fail) and number of rejects (fail only).
  • Page 194 Creep Test: A creep test is a subset of a burst test. There is no test type listed in Sprint LC as a creep test. To setup a creep test first select the burst test type. A creep test is setup to verify that a part can withstand a minimum proof pressure.
  • Page 195 If dump is not required (for instance, if you want to unplug product to vent pressure), set dump to Dump is valuable if you want to link multiple tests and instruct Sprint LC to vent pressure between tests.
  • Page 196 Fixtures can be mechanical, electrical, pneumatic, or combinations of all. Typical fixtures are pneumatic clamps that seal products during a pressure decay or flow test. Sprint LC can supply air from the coupling port to operate pneumatic fixtures. Customers must specify at order whether they want coupling pressure to be line or test pressure.
  • Page 197 Flow Transducer: A device that converts gas flow into electrical signals. The type of transducer used in Sprint LC is a mass flow transducer, which is both accurate and compensated for room temperature influences. Flow Test: A flow test involves pushing air through a product at a set pressure and measuring the resultant flow sensor.
  • Page 198 Interface: Communication between Sprint LC and a peripheral device such as a PLC, computer or printer. Sprint LC has two interface options: an I/O port for discrete communication and a serial port for quantitative test result output.
  • Page 199 (vertical) position. Page 8-9, 30 Main Digital Readout: In the center of Sprint LC’s run display the main digital readout is visible when Sprint LC is in run mode. This readout shows the pressure and flow values during pressure decay, flow, and burst testing.
  • Page 200 Sprint LC can send discrete test results to and accept signals to tell Sprint LC when to begin a test from a PLC through the tester’s I/O port. Sprint LC can also send quantified test results over its RS-232 output.
  • Page 201 Page 54-55, 90-105 Pressure Error: Pressure setpoints above and below test pressure. One pressure error (a plus and minus value) is used by Sprint LC to insure that a valid test is performed on each product. A lack of test pressure that...
  • Page 202 Page 70-85 Run: When the lockout key is in the horizontal position. Sprint LC is in run mode. Sprint LC is set to run when used in production testing. The only other mode is program mode (lockout key in vertical position).
  • Page 203 (average sea level) Sensor: Sprint LC uses two kinds of sensors—a pressure sensor and a flow sensor. As an option, remote sensors can be connected to Sprint LC for automated processes. Sequential: Testing one test or one part after another is known as sequential testing.
  • Page 204 Page 28 Stored Programs: A set of instructions (parameters) that can be set by the customer to run a variety of tests. Sprint LC is shipped with four stored (factory-installed) programs. There are a total of 99 programs available. Users can alter stored programs to meet specific product testing needs.
  • Page 205 The product to be tested is connected to the test port. From the test port, Sprint LC can supply positive pressure or vacuum for a variety of leak and flow tests. Customized Sprint LCs could have multiple test ports. See Bulkhead.
  • Page 206 Test pressure is set by adjusting the air regulator on the back of Sprint LC. Test pressure can only be set if Sprint LC has supply air connected to the back fitting, and the output port is blocked with a leak-tight cap.
  • Page 207 User: For purposes of this guide, user is the person who sets up and enters test parameters into the Sprint LC. It is the operator who handles the day- to-day product testing with the Sprint LC. Valves: Sprint LC contains modular solenoid valves that direct the flow of air through the measurement circuits.
  • Page 208 FREE T E C H N I C A L HELP (281)671-2000 Uson L.P. 8640 North Eldridge Parkway Houston, Texas 77041 (281) 671-2000 service@uson.com Page R18...

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