Split hopkinson bar testing is a tried and tested method in materials testing. Hopkinsons test lab manual click here testing 601 n. One is acting as a motor and another one as a generator. Federal clia regulations require that we only refer samples for testing. Client services 919 68400 308 crutchfield street, suite d durham, nc 27704 monfri 7. One of these two machines is operated as a generator to supply the mechanical power to the motor and the other is operated as a motor to drive the generator. You can search for tests as well as find information about laboratory operations and policies, our accreditation and licensing, and other helpful resources. Hopkinsons test lab ma nual laboratory manual hopkinson s test on dc motor generator set. By adjusting the field strengths of the two machines, the machine m is made to run as a motor and machine g as a generator. Open circuit and short circuit tests on single phase transformer.
Hopkinsons test is another useful method of testing the efficiency of a dc machine. Johns hopkins genomics dna diagnostic laboratory labs. To calibrate the energy meter using direct loading. The motor m draws current i1 from the generator g and current i2 from the d. List of experiments 1 identifying the terminals of dc motors 2 to study the parts of 3 point, 4 point starter and drum controller starter 3 magnetization characteristic of dc shunt generator 4 load test on dc shunt generator. Regulation20 hopkinsons test on dc motor generator set. In hopkinson test, two identical shunt machines are required which are coupled both mechanically and electrically in parallel. Internal lab test s conducted during the semester carries 10 marks. Sample question paper of the lab external 1 draw the magnetising characteristics of dc shunt generator 2 perform the load test on dc shunt generator 3 perform the load test on dc series generator 4 perform the load test on dc compound generator 5 perform the hopkinsons test 6 perform the field test on dc series motor 7 perform the swinburnes test on dc shunt machine 8 perform the speed controltest on dc shunt motor 9 perform the brake test. It is a full load test and it requires two identical machines which are coupled to each other. Split hopkinson pressure bar testing of unsaturated sand. For most of the tests the operating pressure range is 10 psi to 50 psi.
Connect the two dc machines, coupled mechanically as per the circuit. Honed steel barrels 48 1220 mm long with inside diameter of 1. Load test on singlephase transformer and three phase transformers. When the particular pushbutton is pressed it will cause that particular figure file to open. Split hopkinson pressure bar operations manual 592014 15 j. Speed control of dc shunt motor and swinburnes test on dc. Oct 25, 2020 hopkinsons test is another useful method of testing the efficiency of a dc machine. Apparatus range type quantity 01a mc 1 1 ammeter 020 a mc 2 0300 v mc 1 2 voltmeter 0600v mc 1 wire 3 rheostats 1250. As machines are being tested under fullload conditions, the temperature rise and the commutation qualities of the machines can be observed. The hopkinson bar was instrumented with strain gages in order to obtain the transmitted pulse from incident and reflected waves taking account of wave dispersion fig. Two internals will be conducted for laboratory assessment. To obtain efficiency of a dc shunt machine using swinburns test.
To conduct the no load test on the dc shunt motor and determine its efficiency at. At the end of each laboratory session you must obtain the signature of the teacher along with the marks for the session out of 10 on the lab notebook. Questions or other communications regarding testing should be directed to the appropriate laboratory or area of service. To obtain speed control of dc shunt motor using a armature resistance control b field control. End semester lab examination, conducted as per the jntu regulations, carries 50 marks. To perform hopkinsons test and determine losses and efficiency of dc machine.
The method involving the use of a split hopkinson bar enjoys increasing popularity in many applications thanks to ever more powerful test. Arup chief operations officer jonathan genzen, md, phd, has produced a second video to explain how sarscov2 vaccines work. Pulmonary function tests pfts may be ordered as part of routine health assessment, screening for those with workplace exposures, diagnostic assessment for those with suspected lung disease, or management of those with chronic lung disease over time. High amplitude, split hopkinson pressure bar shpb laboratory tests were conducted on compacted specimens of 5080 silica sand to evaluate the influence of saturation on compressionalstress wave velocity, stress transmission, and attenuation. Internal examination for practical shall be evaluated for 10 marks conducted by the concerned laboratory teacher. Conditions medicare benefit policy manual, chapter 15, section 80. In order to carry out this test, we require two identical d. C shunt machines to determine the efficiency of each machine. Medical reference laboratory providing esoteric and genetic testing services, test selection guidance, result interpretation references, and continuing education for clients worldwide.
To conduct a regenerative test on two identical mechanically coupled d. Electrical machines i lab manual anurag college of engineering. Repeat the above test for different values of load 4. Input your desired threshold, which is the level that the signal must cross to trigger a capture of data. To conduct hopkinsons test or regenerative test or back to back test on a pair of. Ucsf clinical laboratories online manual ucsf clinical. To conduct hopkinsons test on a pair of identical dc machines to predetermine the efficiency of the machine as generator and asmotor. Shpb calibration manual and sample test compression. Name of the equipment range type quantity 1 voltmeter 0600v mc 1 0300v mc 1 030v mc 1 2 ammeter 020a mc 3. When swinburnes test figure file is pressed on gui. Swinburnes test and speed control of dc shunt motor.
Start with a number between 100 mv and 600 mv and adjust if needed due to lab noise, etc. Note down the readings of all wattmeters, ammeters and voltmeters for given load. Hopkinsons test is also known as regenerative test, back to back and heat run test. To find out the types of pathology tests, where they are tested, and the type of samples required for any particular test, please refer to the test list manual below. Search our health care diagnostics tests menu labcorp. To conduct hopkinsons test on a pair of dc shunt machines and determine their efficiency. To conduct hopkinsons test on a pair of identical dc machines to pre determine the efficiency of the machine as generator and as motor. Regenerative or hopkinsons test on dc machines is useful to determine the efficiency which the power. Ee8311 syllabus electrical machines laboratory 1 regulation 2017. An evaluation of this technique has been conducted in the mechanical shock laboratory at sandia national laboratories snl to determine its use in the practical calibration of accelerometers.
Electrical machinesi lab manual anurag college of engineering, aushapur department of eee index s. Each test entry contains information about the testing site, method. To conduct hopkinsons test or regenerative test or back to back test on a pair of dc shunt machine and hence predetermine the efficiency of the machine working as a motor and generator under various load conditions. For providers that do not have access to the hopkins epic system to place orders, please complete a referral form and fax it to 4105026759 all patients are required to have a negative covid19 test results within 72 hours of their pulmonary function test appointment. Technical manual for hopkinsons test manufactured by. Procedure, calculation of efficiency, advantages, disadvantages this as an elegant method of testing d. Shock testing accelerometers with a hopkinson pressure bar. The information contained in this handbook is intended for use by personnel of university of iowa health care. Labcorps test menu provides a comprehensive list of specialty and general laboratory testing services.
No tools range quantity 1 rheostat 700 2a 1 2 rheostat 350 1. Split hopkinson bar test apparatus advance instrument inc. The input to the motor is given by the supply mains. Ee6411 circuit diagram load test on dc shunt motor figure 10. A split hopkinson bar technique has been developed to evaluate the performance of accelerometers that measure large amplitude pulses. Electrical machine lab i ee215f lab manual iii semeee page 7 procedure. Shpb, hopkinson s test,kolsky bar,hopkins bars,shpb test,high strain rate test, hopkinson bar test,bar kolsky. This online laboratory manual contains information about the tests available through the ucsf clinical laboratories. Professional and administrative staff can be reached between 8. Draw output vs efficiency graph as a motor and as a generator.
Spalling tests based on the use of a single hopkinson bar were pioneered by klepaczko and brara 2001 and schuler et al. Unlike quasistatic testing machines a split hopkinson bar enables material properties to be determined in dynamic conditions. The below figure shows the essential connections for hopkinsons test. To obtain speedtorque characteristics of a dc shunt motor. The end examination conducted for 50 marks with duration of 3 hours.
Experiment1 calibration of single phase energy meter aim. Ee2701 electrical machinesi lab 1 electrical machinesi. Shock tube and split hopkinson pressure bar tension and compression test facilities have been commissioned at the university of mississippi, for the high pressure and highstrain rate evaluation of nanoreinforced panels and sandwich composites. Load test on singlephase transformer and three phase transformer connections. Here it will be shown that while power drawn from the supply only corresponds to no load losses of the machines, the armature physically carries any amount of current which can be controlled with ease.
The structure of the proposed model is as shown in fig 1. Rheostats to vary field current of motor and generator respectively. Aug, 2016 direct method indirect method or swinburnes method regenerative method or hopkinsons method types of testing of a dc motor 5. If a desired test is not listed in the laboratory manual, please contact the laboratory at 4153531667 and ask to speak to a laboratory medicine resident, medicalsection director, or our sendout staff to inquire if the test is available. Choose the proper ranges of meters after noting the name plate details of the given machine and make the connections as per the circuit diagram. Iron loss change because of flux distortion is taken into account because of the fullload condition. Daytoday work in the laboratory shall be evaluated for 15 marks. Power required for the test is small as compared to the fullload powers of the two machines. Johns hopkins outpatient center express testing 601 n.
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