Atec Vishay-P3 User Manual • Micro-measurements, Strain indicator and recorder • Atec Requires Model 1550A Strain Indicator calibrator or other. A true Wheatstone-bridge simulator, the 1550B Strain Indicator Calibrator Reverse switching for plus and minus calibration • High precision Vishay APPENDIX C .-- DATA ACQUISITION SYSTEM CALIBRATION PROCEDURES AND RESULTS 1 1 to the strain indicator was calibrated after installation underground .1550A Micro-Measurements Strain Indicator Calibrator FEATURES True Wheatstone bridge circuitry Simulates quarter, half &full bridge - both 120 /350 This Vishay Measurements 1550A Strain Indicator Calibrator is used and in excellent condition. Show More Description. Important Notice: Other accessories, APPENDIX C .-- DATA ACQUISITION SYSTEM CALIBRATION PROCEDURES AND RESULTS sensor to the strain indicator was calibrated after installation underground . A goal for this investigation was to determine a calibration value with high USA [ 7 ] 1985 Model 1550A Strain Indicator Calibrator Instruction Manual vishay 1550A strain indicator calibrator manual datasheet, cross reference, circuit and application notes in pdf format. 1550A. Strain Indicator Calibrator. Document No.: 11313. Revision: 17-May-2011. A laboratory standard for verifying the calibration of strain and transducer