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APPENDIX A VIBRATION UNITS (X) PEAK TO PEAK AMPLITUDE (A) (microns) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 0.005 0.02 0.045 0.08 0.125 0.18 0.245 0.32 0.405 0.5 2.0 4.5 8.0 12.5 18.0 24.5 32.0 40.5 50.0 60.5 72.0 84.5 98.0 112.5 128.0 144.5 162.0 180.5 200.
6.0 CALIBRATION 6.1 When Vibratron II is being used in extensive, long-term studies, it may be appropriate to have the unit calibrated periodically. Factory testing and calibration are available. Please call for more information 7.0 WARRANTY AND SERVICE 7.1 WARRANTY Physitemp Instruments Inc. warrants this system to be free from defects in material or workmanship for 12 months from date of shipment.
Testing is completed when the subject has made a total of five errors. A single error often appears early in the testing sequence. This anomalous data point is compensated for in the data analysis procedure (see below.) It should be noted that accurate measurements below 1 vibration unit (0.5 microns peak to peak amplitude) are not possible with this equipment.
4.1 The recommended method of testing is a “two-alternative” forced choice procedure.” For each trial the subject is required to determine which of the two rods is actually vibrating. The position of vibration is under experimental control, determined by a randomized sequence. The intensity of the sequence is similarly under the control of the experimenter and is determined by a testing algorithm (see below.
22.4 CONNECTION TO AC POWER SUPPLY AND “SWITCH ON” Connect line cord to socket on the back of the controller and to AC outlet. Use POWER switch on rear panel to turn ON. 3.0 OPERATION IMPORTANT NOTE: This instrument is normally calibrated at 60Hz line frequency. If it is to be used at 50Hz line frequency there will be a calibration sticker attesting to this on top of the control unit. SELECT THE RANGE There are two operating ranges: High resolution, 0 - 6.5 vibration units.
VIBRATRON II Vibration Sensitivity Tester 1.0 GENERAL DESCRIPTION The Vibratron II provides a means of measuring sensitivity to vibration in the hands and feet. The instrument consists of two modules with vibrating posts and a controller. Vibration amplitude is measured in microns (1 micron = 10-4cm) and either post can be set to vibrate at different amplitude levels. (The digital display reads in vibration units which bear a square law relationship to the peak to peak amplitude in microns.
OPERATING MANUAL VIBRATRON II Vibration Sensitivity Tester CONTENTS SECTION QX P:\CW shared\Operating Manuals\EB VIB Rev 503 PAGE 1.0 GENERAL DESCRIPTION 2 2.0 INITIAL INSTALLATION 2 3.0 OPERATION 3 4.0 TESTING PROCEDURES 3 5.0 SPECIFICATIONS 5 6.0 CALIBRATION 6 7.
