Noncontact Displacement Measuring System User`s Manual
Contents
1. 12 o 10 O 8 gt 6 2 4 e 12V in Aluminum a 2 m 12V in 303 Stainless A A 12V in 4130 Steel 0 100 150 200 250 Displacement Mils 0 50 Outputs at Medium Gain amp 24 Volt Input 12 10 D amp 8 gt 6 5 Q 4 5 e 24V in Aluminum O 2 g 24V in 303 Stainless o 24V in 4130 Steel 0 50 100 150 200 250 Displacement Mils Example Output Noise 12Vdc Input Mid Gain Medium Displacement T 4 00 gt 3 50 E 3 00 O 2 50 S 2 00 i 1 50 E 1 00 S 0 50 0 00 m 4130 Steel 304 Stainless Aluminum 1000 10000 Bandwidth Hz 100 Aluminum Output for 12 amp 24 Volt Inputs 13 24Vdc High Gain o 11 g 9 12Vdc High Gain S 12Vdc Low Gain 24Vdc Low Gain 55 O O 3 O 1 0 50 100 150 Displacement Mils 303 SS Output for 12 amp 24V Inputs 14 24 Vdc High Gain o 12 10 8 12 Vdc High Gain gt 2 6 c Low Gain m 6 4 ckow Gain O 2 m 0 0 50 100 150 Displacement Mils 4130 Steel Output for 12 amp 24 Volt Inputs 18 24 Vdc Low Gain DC Output Voltage 12 Vdc Low Gain 0 50 100 150 Displacement Mils Outputs at Medium Gain amp 122. Target Material 9C Sensor Measuring Range Non Ferrous Aluminum 0 0 175 in 0 4 45 mm Non Magnetic Steels 304 0 025 0 200 in 0 64 5 08 mm Stainless Magnetic Steels 4130 0 040 0 275 in 1 02 6 99 mm 5CM Sensor Specifications 160 Dia 4 1 Ae 1 60 40 6 pi 1 85 47 0 Target Material 5CM Sensor Measuring Range Non Ferrous Aluminum O 0 100 in 0 2 54 mm RG179 coax cable M5 x 0 8 THD hie SMA Male Connector 120 3048 Non Magnetic Steels 304 0 010 0 125 in 0 254 3 18 mm Stainless Magnetic Steels 4130 0 015 0 150 in 0 38 3 8 mm Dimensions are in inches millimeters 9C Sensor Response Data Aluminum Output for 12 amp 24 Volt Input 14 Vdc High Gain o 12 O AN amp 10 l T O 12 Vdc High Gain gt 8 a 6 Vdc Low Gain 6 4 Vdc Low Gain 2 0 0 50 100 150 200 250 Displacement Mils 14 12 v 10 l T gt Vdc High Gain gt 8 Vde Low Gain 3 6 oar Q 5 4 Vdc Lo O O 5 2 0 100 150 200 250 Displacement Mils 4130 Steel Output for 12 amp 24 Volt Inputs 0 50 14 24 Vdc High Gain S eet 30 Vdc High Gai S c High Gain 5 26 m oo 24 Vide tow Gain a2 12 Vde Low Gain 0 100 150 200 250 Displacement Mils 0 50 Outputs at Medium Gain amp 12 Volt Input
3. KD 2440 Noncontact Displacement Measuring System User s Manual This apparatus when installed and operated per the manufacturer s recommendations conforms with the protection requirements of EC Council Directive 89 336 EEC on the approximation of the laws of the member states relating to Electromagnetic Compatibility Please refer to the KD 2440 Declaration of Conformity or contact Kaman Precision Products for details a Z S o zZ a 2 SWITCH 3 SWITCH J 47VIN KD 2440 Kaman Precision Products Displacement Measuring system Model KD 2440 is a noncontact linear proximity measuring system This low cost easy to use system makes precision static and dynamic measurements of metal targets and thickness measurements of non conductive material backed by metal The system includes a switching output that will track RPM measurement to 10Khz Features Summary Advantages e Outstanding Precision Static Resolution to 12 Microinches Easy to Adjust Excellent Performance with Ferrous Targets Variable Voltage Input from 12 to 24 Volts DC Adjustable Gain for up to 22 Volts Output with 24 Volts Input Compact Rugged Electronics and Sensors Temperature Tolerant Sensors to 400 F Level Adjustable Switched Output to 10Khz for Process Control e Drop in Replacement to Kaman s KD 2400 with Accessories Kit KD 2440 Unit The KD 2440 system consists of three subassemblies the sensor with integrated cable the
4. Volt Input 12 o 10 o nd i 8 6 A e Aluminum 54 O m 303 Stainless oO 2 O 4130 Steel 0 0 50 100 150 Displacement Mils Outputs at Medium Gain amp 24 Volt Input 14 i 10 S n 8 Q 5 Aluminum 7 4 g 303 Stainless a 2 4130 Steel 0 0 50 100 150 Displacement Mils Example Output Noise 12Vdc Input Mid Gain Medium Displacement e 4130 Steel a Aluminum 304 Stainless gt 0 80 O70 E 0 60 0 50 0 40 0 30 0 20 0 10 0 00 ise Differential No 1000 Bandwidth Hz 100 10000
5. point adjust clockwise until the analog output saturates 3 Slowly increase the gain potentiometer counter clockwise until it saturates at its maximum point this will be approximately two volts below the input voltage 4 Atthis point the module is calibrated to a maximum output per displacement condition As the sensor is moved toward the target from approximately 058 the output will decrease If the sensor target displacement is increased beyond 058 the output will saturate at approximately two volts below the input Switched Output Operation The KD 2440 s switched output is a simple on off switch with a corresponding LED indicator lamp The switch is in a closed condition when the LED is illuminated The switch can be adjusted to trip anywhere along the sensor range using the Switch Setpoint potentiometer CLEANING The KD 2440 is not designed to be immersed or operated while immersed in liquids Solvents may damage electronics module sensor or power I O cable Clean the unit with a damp cloth EMI PERFORMANCE The KD 2440 conforms with the applicable standards of Council Directive for Generic for Light Industrial and Commercial Use Under some EMI environments at specific frequencies the KD 2440 unit may experience a change in output voltage In general when exposed to those environments covered by the EMC directive the user can expect less than 5 deviation of output Contact Kaman Instrumentatio
6. point in the cable will keep liquids from running down the cable and into the electronics Take care to route the sensor cable to avoid crushing or crimping it during use Damage to the sensor cable may affect the desired set points and overall operation of the electronics Theory of Operation The KD 2440 system operates on a traditional Colpitts oscillator circuit where the sensor acts as the resonating coil for the oscillator The proximity of the target to the sensor face pulls the oscillator changing its frequency and amplitude of modulation controlling a variable gain oscillator section within the electronic circuit 5CM Sensor Response Data 5CM Sensor Response Data The signal is half wave rectified and filtered to obtain an analog voltage proportional to the target position or displacement The analog voltage output can be varied by adjustment of the gain The input power is diode protected and regulated to provide a clean low noise signal The output is short circuit current protected Adjustment and Calibration The KD 2440 is instrumented with a ten volt regulator to provide a clean repeatable output signal The input voltage must be maintained at a minimum of twelve volts for the regulator to function The gain ratio of output voltage to target displacement is used to adjust the output slope output per displacement When changing types of target materials or power supply voltages it will be necessary to readjust t
7. he gain for the desired output voltage The KD 2440 can easily be adjusted or calibrated to obtain maximum output per displacement maximum range or any variation in between Note that when the KD 2440 is adjusted for maximum output per displacement it is at a minimum usable range whereas a minimum gain gives a voltage change throughout the largest displacement for the same sensor target and range as depicted in the following graph 4130 Steel Output for 12 amp 24 Volt Input 18 24 volt input w ith high gain o 16 3 14 12 volt input w ith S 12 high gain 5 10 gt 8 O 9 6 12 or 24 volt input 4 with low gain 0 50 100 150 Displacement Mils The minimum gain is defined as being the lowest gain obtainable without pulling the circuit into saturation Minimum gain can be obtained by setting the sensor displacement to a point within the usable range preferably mid range then slowly decreasing the gain potentiometer clockwise until the output saturates At this point increase the gain slightly to a point just above saturation the output begins to change with a gain increase Example Calibration To maximize the output slope for an application using a 5CM sensor with a 010 offset and a range of 040 follow these steps 1 Adjust the sensor target to its maximum displacement plus the offset plus approximately 20 of the range 058 2 Adjust the gain potentiometer to its minimum
8. n for specific data or for recommended solutions if you experience problems with the KD 2440 KD 2440 Specifications ELECTRICAL INPUT Voltage Regulated 12 VDC to 24 VDC Current Fuse limit input current from power source to 11 mA 28W maximum at full load ANALOG OUTPUT Current Full load 4 2 mA maximum Impedance 50 ohms Voltage 0 22 VDC minimum with 24 VDC input 0 10 VDC minimum with 12 VDC input SWITCHED OUTPUT Opto lsolated Load Current 100 mA maximum AC or DC Load Voltage 30V rms 42 4V peak or 60Vdc On Resistance 30 ohms minimum 50 ohms maximum Switch Point Hysterisis 0 56 of full scale for 9C sensor and 0 97 of full scale for 5CM sensor using 24Vdc input on 4130 steel FREQUENCY RESPONSE 0 10 KHz 3db RESOLUTION Better than 0 008 of measuring range using a 5CM sensor on a 4130 steel target at mid scale and 12Vdc input ENVIRONMENTAL ENCLOSURE RATINGS Sensor IP 67 Electronics IP 61 OPERATING TEMPERATURE RANGE Sensor and cable 0 F to 400 F 18 C to 205 C Electronics 32 F to 150 F 0 C to 66 C STORAGE TEMPERATURE RANGE Sensor and cable 60 F to 400 F 52 C to 205 C Electronics 58 F to 212 F 50 C to 100 C THERMAL DRIFT Less than 0 22 per C of full scale for sensor electronics or system 9C Sensor Specifications 320 Dia RG179 coax cable 3 8 24 THD 8 13 Ap NN SMA Male Connector 1 030 26 16 1 250 31 75 96 2438
9. signal conditioning electronics module and the power and output cable The KD 2440 electronics uses a standard DB 9 connector to bring 12 Vdc to 24 Vdc into the electronics and provide outputs for the analog voltage and switch functions Electronics DB 9 Connector Face I O Cable DB 9 Connector Face DB 9 Connections and Power I O Cable Color Chart Wire Color Pin Signal Lo EN o oo po BN po BN ORN 9 VOUT CLR CABLE SHIELD Electronics The KD 2440 electronics has two potentiometers accessible through openings in the enclosure for adjusting the GAIN and SWITCH SET POINT level An LED indicates when the optically isolated switch is in the closed position The KD 2440 electronics and sensors utilize SMA type coaxial connectors female on the electronics and male on the sensor cable Two production sensor configurations are available the 9C and the 5CM Data for these two sensors is shown on the following pages The sensor must be attached snugly finger tight to the electronics assembly for the unit to function properly Mounting Instructions Mounting the KD 2440 electronics module can be done using either of the two holes in the enclosure and an M 3 or 4 screw It is preferable not to remove both screws from the case for mounting purposes An easier mounting method may be to use a cable tie wrap or zip tie Positioning the electronics module so that it is not the low
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