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PART NO: 860029-001

Last Revised 01/06/15

Figure 7 15N Sensor Dimensions

Figure 8 20N Sensor Dimensions

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Содержание KD-5100

Страница 1: ...ision Products PART NO 860029 001 A Division of Kaman Aerospace Corporation Last Revised 01 06 15 217 Smith Street Middletown CT 06457 www kamansensors com KD 5100 Differential Measuring System User s...

Страница 2: ...ivity may occur under the following conditions 14 8 2 Additional points of emphasis about cross axis sensitivity 14 9 0 PIN OUT and CONNECTOR ASSIGNMENTS 15 10 0 USER S ABBREVIATED FUNCTIONAL TEST 16...

Страница 3: ...Configuration 8 Figure 5 Aluminum Targets on Invar 8 Figure 6 Mounting Cover Plate Dimensions 10 Figure 7 15N Sensor Dimensions 12 Figure 8 20N Sensor Dimensions 12 Figure 9 Sensor Coil Dimensions 13...

Страница 4: ...d target sensitivity and measuring range We calibrate these systems in a controlled environment using a precision laser as a primary dimensional standard Since it is difficult for users to duplicate o...

Страница 5: ...upling depends upon the gap between them and changes in gap cause an impedance variation in the coil In the KD 5100 the coils of a pair of sensors form the opposite legs of a balanced bridge circuit F...

Страница 6: ...ching the sensors By using electrically matched sensors on opposing legs of the same bridge temperature effects common to the sensors and cabling of a differential sensor pair tend to be cancelled Thi...

Страница 7: ...timum performance stabilize the temperature for the mounting surface electronics at a constant temperature within this range preferably 25o C 4 0 APPLICATION INFORMATION For differential measurement a...

Страница 8: ...h more stable temperature characteristics such as Invar or other substrates as long as target thickness guidelines are observed Figure 5 Figure 5 Aluminum Targets on Invar These systems are set up to...

Страница 9: ...ds on the actual target material used In cases where the sensors are opposing each other aluminum target thickness must be at least 0 050 to prevent sensor interaction Material Thickness in mils Silve...

Страница 10: ...has a smooth surface to enhance thermal conduction away from the electronics Mounting the base plate flush with another surface will enhance thermal dissipation assuming a mount surface with a tempera...

Страница 11: ...uld be in the sensor s field Some loading may be acceptable if it is equal and the sensors are calibrated in place Even then sensor loading may cause non linearity If unable to calibrate loading is to...

Страница 12: ...www kamansensors com 12 PART NO 860029 001 Last Revised 01 06 15 Figure 7 15N Sensor Dimensions Figure 8 20N Sensor Dimensions...

Страница 13: ...ze performance and to keep the target from contacting and possibly damaging the coils in the sensor face The sensor coil is mounted at the face of both types of sensor For purposes of mechanical nulli...

Страница 14: ...fied 0 1 to about 0 3 8 2 Additional points of emphasis about cross axis sensitivity Again the error manifests itself only at the end points of target travel the last 20 when the target tilts fully in...

Страница 15: ...2 S4 S2 Figure 10 Sensor Cable Connections Pin assignments for the Power Signal line connector J5 Figure 11 PIN FUNCTION 1 15 VDC 2 15 VDC 3 Power Supply Common 4 Signal Output Axis 1 5 Return Signal...

Страница 16: ...hand holding and moving the sensor or the target will be sufficient for this check See Figure 11 for power and output connections at J5 The output for sensor S3 and S1 axis 1 is at pin 4 Slowly move t...

Страница 17: ...ee times the sensor s diameter The sensor field radiates in all directions Figure 12 Excessive back loading can also be a problem CAUTION Be careful not to damage the sensor coil during this procedure...

Страница 18: ...ne to J5 and apply power to the system Use the output from the system as a guide in the final positioning of this sensor electrical nulling Slowly move the second sensor toward or away from the target...

Страница 19: ...be possible For example if you purchased a standard system calibrated 0 to 9 volts over a 9 mil measuring range 1V mil and attempted to recalibrate for 9 volts over a 3 mil measuring range 3V mil ther...

Страница 20: ...it is preferable to have the system installed in the application fixture at normal operating temperatures This eliminates any shift in system output caused by moving the system from a calibration fixt...

Страница 21: ...nd the cover plate 12 3 3 Install the calibration cover plate power up the system and allow a 20 minute warm up period Monitor system output to verify stability NOTE Output at null should be ideally 0...

Страница 22: ...good dimensional standard and very stable fixturing located in a controlled environment When measuring at sub micro inch levels the world becomes rubber and the fixturing may have expanded or contrac...

Страница 23: ...havior If unable to calibrate the system in no more than two iterations the problem is most likely poor mechanical repeatability in the fixturing or actuating mechanisms 13 3 There is a way to check i...

Страница 24: ...ptimize performance offset null gap minus max range Measuring Range The measuring range is the full range of target motion over which the various specifications such as resolution linearity and sensit...

Страница 25: ...tive Resolution is an application dependent value determined by multiplying the Equivalent RMS Input Noise specification by the square root of the measurement bandwidth Example An application with a 1...

Страница 26: ...month Thermal Sensitivity at Null 20o F to 165o F KD 5100 15N 5 x 10 6 o F 2 3 x 10 4 o C KD 5100 20N 5 x 10 6 o F 2 3 x 10 4 o C Frequency Response DC to 5 KHz Equivalent RMS Input Noise DC to 5 KHz...

Страница 27: ...m the sensor face to the target that is still within the measuring range Null Gap The distance from the sensor face to the target when the target is equidistant between the sensors Reference figure 15...

Страница 28: ...earity of KD5100 0 00 1 00 2 00 3 00 4 00 5 00 6 00 0 10 20 30 40 50 60 70 80 90 100 Full Range as of Coil Diameter Best Fit Non Linearity as of Full Range Estimated Non Linearity of KD5100 0 00 0 10...

Страница 29: ...ut 0 004 mils o C 0 1 m o C Typically the temperature coefficient of a KD 5100 is the worst when at the extremes of the range and is excellent at the null position because the sensors are balanced Thi...

Страница 30: ...i e 1 is good 0 5 is not as good This also affects the temperature coefficient of the electronics in the same relative manner At a relative sensitivity of 1 the electronics has a temperature coefficie...

Страница 31: ...4 0 032 0 30 0 015 0 0050 70 10 100 60 50 1 60 1 600 0 04 0 040 0 30 0 017 0 0056 77 10 110 65 55 2 20 2 420 0 04 0 044 0 20 0 028 0 0092 84 10 120 70 60 3 00 3 600 0 05 0 060 0 20 0 030 0 0100 91 10...

Страница 32: ...69 35 250 160 125 1 50 3 750 0 04 0 088 0 30 0 042 0 0139 83 35 300 185 150 3 00 9 000 0 05 0 150 0 20 0 075 0 0250 96 35 350 210 175 5 50 19 250 0 06 0 210 0 15 0 117 0 0389 KD 5100 20N Sensor Metri...

Страница 33: ...luminum targets are considered in this appendix In general the KD 5100 is best used with non magnetic relative permeability 1 low resistivity targets The effect this has on the sensor is dependent on...

Страница 34: ...curate from about 10 50 of the coil diameter Ranges of less than 10 will have additional errors not accounted for such as thermal expansion of the sensor body Ranges less than 10 and greater than 50 w...

Страница 35: ...ly controls these KD 5100 characteristics in most applications Output Filter Schematic The output filter is a standard 2 pole Butterworth configuration It is set for a cutoff frequency 3 dB of approxi...

Страница 36: ...equency Hz Magnitude dB Relative Magnitude dB Phase Shift degrees 10 4 03 dB 0 00 0 00 100 4 03 dB 0 00 0 36 1000 4 03 dB 0 00 3 50 2000 4 03 dB 0 00 7 01 5000 4 02 dB 0 01 18 72 10000 3 74 dB 0 29 38...

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