EAZY-CAL™ LVC-4000 User Manual
Contents
1. Yellow indicates Slave mode NULL Green indicates Master mode FULL SCALE ZERO Buttons During Normal Operation Press both buttons for 3 seconds to enter Calibration Mode During Calibration Press ZERO button to set core minimum endpoint position Press FULL SCALE button to set core maximum endpoint position Press both buttons for 3 seconds to abort Calibration Mode AST Macro Sensors LVC 4000 User Manual Page 8 of 14 WWW macrosensors com Manual P N 0653 0006 0000 Rev E 5 CALIBRATION PROCEDURE Calibrating the LVC 4000 consists of entering Calibration Mode finding the NULL center position of the LVDT attaching the core to the object to be measured and then moving the core to set the ZERO and FULL SCALE positions that will correspond to the minimum and maximum output voltage or current The LVC 4000 returns to Operating Mode immediately after both positions have been set The basic calibration instructions are printed on the side of the LVC 4000 for reference Directions are as follows 1 Set the LVC 4000 DIP Switches for the desired application The factory default settings provide a O 10VDC output and are typical for most standard LVDTs Refer to section 3 0 for details 2 Connect the LVDT to the LVC 4000 as shown in the connection diagram and apply power The OPER CAL LED will light along with the Green NULL LED if the unit is in Master Sync mode or the Yellow LED if the unit is in Slave mode 3 minutes2. SW1 7 5VDC SW1 8 10VDC All Off 4 20 mADC Frequency Select one of four Excitation Frequencies Filter Select one of 4 filter cutoffs Bus Address Select one of 16 RS 485 Bus Address ADDRO sb via a 4 switch binary number See ADDR1 table for switch combinations Also ADDR2 used to select order of ADDR3 b Synchronization Master Slave order ias BUSADDR 00 01 02 03 04 05 06 07 sw2 5 OFF OFF OFF OFF SW2 6 SW2 7 SW2 8 BUSADDR 08 09 10 11 12 13 14 15 SW2 5 SW2 6 sw2 7 OFF OFF OFF OFF SW2 8 Factory default settings AST Macro Sensors LVC 4000 User Manual Page 7 of 14 WWW macrosensors com Manual P N 0653 0006 0000 Rev E 4 FRONT PANEL The front facing side of the enclosure contains the push buttons and LED indicators which are used for calibrating the LVC 4000 to the LVDT Ze MAC 20 SENSO 25 LVC 4000 OPER O car v CALIBRATE e EAZY CAL LVDT SIGNAL CONDITIONER Front Panel Description OPER CAL LED Red On indicates Operating Mode Blinking indicates Calibration Mode POSITION LEDs During Calibration Yellow Yellow indicates core is above null position Green NULL Green indicates core is at null position Yellow Yellow indicates core is below null position During Normal Operation Error Condition Yellow blinking indicates Primary Wire Break Yellow blinking indicates Secondary Wire Break Synchronization State
3. 1 with PRI 2 LVDT connections will reverse the direction indicated by the Position LEDs e Calibration mode can be canceled by pressing the 2 buttons simultaneously for 3 seconds AST Macro Sensors LVC 4000 User Manual Page 9 of 14 WWW macrosensors com Manual P N 0653 0006 0000 Rev E 6 RS 485 DIGITAL INTERFACE Included on the LVC 4000 is a 2 wire multi drop RS 485 communications port This allows a host computer to perform remote calibration receive operational status and retrieve measurement data Data can be exchanged between one or more units and a PC with a USB to RS485 adapter attached A terminal program Hyperlink or 3 party software is required Port parameters are currently set to 9600 bps no parity 8 data bits and 1 stop bit 9600 NP 8 1 Data is ASCII 6 1 Command Format Units respond to commands in the format aa cmd param CR where Se is the colon character aa is the Unit Address 00 15 as set by the Digital Address DIP switches cmd is the command param is the optional command parameter CR is a carriage Return character A space character is required between the address and command and between the command and parameter Commands are not case sensitive AST Macro Sensors LVC 4000 User Manual Page 10 of 14 WWW macrosensors com Manual P N 0653 0006 0000 Rev E 6 2 Commands The currently implemented commands and their descriptions are as follows getConfig Showsthe operating
4. of warm up time is recommended 3 Enter the Calibration Mode by pressing and holding both buttons simultaneously for 3 seconds minimum The OPER CAL LED will begin blinking 4 Move the LVDT core to NULL position by observing the 3 Position LEDs The and LEDs indicate that the core is inserted or extended beyond the NULL respectively 5 Attach the core to the workpiece to be measured so that the workpiece center of motion is aligned with the LVDT NULL 6 Move workpiece to its minimum position and press the ZERO button Wait for the Position LEDs to stop blinking 7 Move workpiece to its maximum position and press the FULL SCALE button The unit will exit Calibration Mode and operate with its new calibration The OPER CAL LED will be steady On 5 1 Notes on Calibration e tisimportant that the NULL position be set as close as possible to the center of the displacement range Otherwise non linearity errors may result at or near the endpoint positions e The LVDT core MUST NOT protrude from the LVDT during the calibration or erroneous calibration will result e Calibration may be performed by setting the FULL SCALE position first rather than ZERO position Either end position may be on either side of NULL e Any portion of the LVDT specified displacement can be calibrated to produce a full output span If the desired displacement is asymmetrical set the endpoint that is farthest from NULL first e Swapping SEC 1 with SEC 2 or PRI
5. signal conditioners The following sections describe the features and operation of the LVC 4000 AST Macro Sensors LVC 4000 User Manual Page 4 of 14 WWW macrosensors com Manual P N 0653 0006 0000 Rev E 2 ELECTRICAL CONNECTIONS There are four color coded terminal plugs each having 4 screw terminals The 16 terminals are labeled 1 through 16 Terminal plugs can be easily plugged and unplugged to facilitate LVC 4000 replacement in system The terminal names and their function shown below Color Terminal Red Nam Funton 0 0 0 3 PRA PrimaryExdtatintolVDT O 4 PR2 PrimaytxdtationtolVDT Rm 5 SHIELD GND Optional cable Shield connection 6 SEC CT Optional Secondary CT conn n c 7 SECA Secondary signal from LVDT os 8 0 seca SecondavsignalfromWOT Blue Blue o v cour VDC OUT Output OutputVoltage O O 10 nc NoCometon O 1 GND VOUT IOUT Return es 02 COT WS 05 0 n5 O RS48B5 Data RS 485 BUS 14 RS 485 A RS 485 Data VIN GND Supply Voltage Return Supply Voltage In PRIMARY PRIMARY PRIMARY PRIMARY ERROR FLAG ERROR FLAG 2 580 l IN2 3 4 SYNC f rS INE SYNC HY DN DND O Ae s KA I JUMPER i Al d SEC wow mm Z x JN d E ANV ia 9 10 11 12 AAA v i j YYY DC OUT NA OC OUT v
6. state of the unit and displays a list of all of the significant parameters as shown in the example below Macro Sensors LVC 4000 Configuration H W Version REV F W Version 0 7 Serial No Bus Address O Excitation Freq Z 0RHZ Filter Select NONE Invert NORM Output Range VOUT U10 ADC Slope 4 048681 ADC Offset 301 INA Gain 2 ADC Range 1 Sync State MASTER Note that the ADC Slope ADC Offset INA Instrumentation Amplifier Gain and ADC Range parameters are computed during calibration and can be downloaded into another unit This allows for hot swap configuration where a replacement unit can instantly function in place of the old unit without the need for rerunning the calibration process getOut Returns nominal analog output value scaled in units that depend on the setting of the Output Range DIP switches sADCsl Set the ADC Slope coefficient during hot swap reconfiguration sADCos Set the ADC Offset coefficient during hot swap reconfiguration cal Enter Calibration Mode getLEDs Get state of LEDs during calibration setFull Set the Full displacement position during calibration setZero Set the Zero displacement position during calibration SetINA Set the Instrumentation Amplifier gain during hot swap reconfiguration abortCal Terminate the calibration procedure and go to Operate Mode The LVC 4000 uses parameters which were in place before the start of the calibration getError returns the error status help Lists all t
7. 14 m Manual P N 0653 0006 0000 Rev E WWW macrosensors co 1 GENERAL DESCRIPTION The EAZY CAL LVC 4000 is a standalone signal conditioner supporting a wide range of LVDTs RVDTs and Half Bridges and providing several choices of voltage current and digital RS 485 outputs Push button calibration offers intuitive operation as compared to units with span and offset trim pots Fault conditions such as a wire break on LVDT connections are indicated by blinking LEDs output of an error voltage or current and Error Flag Open Collector signal The LVC 4000 operates from a 9 30VDC power supply and is housed in a polyamide DIN rail mounted enclosure Calibration instructions terminal functions LVDT connection diagram and DIP switch functions are printed on the side panels for convenience Synchronization to other signal conditioners is accomplished by a daisy chain connection to a synchronization bus One unit will assume the Master function based on DIP switch priority setting Ifa fault should occur the next highest priority unit will take over as Master With the use of the RS 485 port a host computer is able to retrieve measurement data receive operational status perform remote calibration and perform hot swap reconfiguration Hot swap is further simplified by the pluggable terminal block feature An LVC 4000 can be quickly replaced in a live system without the need to unscrew terminal connections or sever connections between other
8. DC OU 13 14 15 16 13 14 15 16 B B TAM A Gre _ LY 85 485 BUS ge LVDT LVRT Connection Diagram Half Bridge Connection Diagram Note select either voltage factory default or current output using DIP SW1 AST Macro Sensors LVC 4000 User Manual Page 5 of 14 WWW macrosensors com Manual P N 0653 0006 0000 Rev E 3 DIP SWITCHES There are two 8 section DIP switches on the PCB The switches provide selection of Primary Level Excitation Frequency Bandwidth Output Voltage Range Select Output Invert and RS 485 Bus Address To access the DIP switches the front cover and PCB must be withdrawn from the housing Use a screwdriver or similar tool to depress the top latch The cover will spring forward Repeat with the bottom latch then gently pull the PCB out as shown e M d Cover Release Latch Withdraw PCB 1 2 a A amp 6 1 a SW i Orr ON 2 a 4 4 6 7 a AST Macro Sensors LVC 4000 User Manual Page 6 of 14 WWW macrosensors com Manual P N 0653 0006 0000 Rev E The following table shows the control settings of the DIP switches SWITCH Primary Drive Select between 3Vrms High amp SW1 1 1 5Vrms Low Excitation Output Reserved No Function SW1 2 Output Invert Normal Invert Reverse the direction of SW1 3 OFF ON Output vs displacement Output Range SW1 4 0 10VDC Only 1 switch Select one of five VDC SW1 5 0 5VDC on at a time outputs or the IDC output SW1 6 0 5 4 5VDC
9. ature Range 20 C to 75 C EMC Compliance Emissions EN55011 2007 Immunity EN61000 4 2 2009 EN61000 4 4 2004 EN61000 4 6 2009 EN61000 4 3 2010 A2 2010 Synchronization Capability Master Slave Synchronization via single wire bus Automatic Calibration Via Front Panel Push Button or RS 485 command Null Detection Via Front Panel LEDs or RS 485 command Digital interface RS 485 2 wire multi drop network 16 addresses selectable Error Detection Primary or Secondary Wire Break Detect indicated by LED Error Flag and Error Output Level Error Flag Open collector output 50 mA 30 V DC max AST Macro Sensors LVC 4000 User Manual Page 13 of 14 WWW macrosensors com Manual P N 0653 0006 0000 Rev E Some of our business partners are SIEMENS QWOILSTATES Schlumberger Ex onMobil MIC Technologies CAMERON E MER SON Process Management inve ns S DRESSER RAND P EPIEP E wA ar SET ConocoPhillips BAKER AT MAC 30 SENSO S Pinon Ch Howard A Sehaawiir Fecireoeoioegiesg Joe 7300 US Route 130 North Bldg 22 Pennsauken NJ 08110 1541 USA tel 856 662 8000 fax 856 317 1005 WWWw macrosensors cor lvdts macrosensors com All specifications subject to change without notice 2012 Macro Sensors 05 12 AST Macro Sensors LVC 4000 User Manual WWW macrosensors com Manual P N 0653 0006 0000 Rev E Page 14 of 14
10. de MAC XO SENSO YS EAZY CAL LVC 4000 LVDT Signal Conditioner ss A Led 2 ge e F Sg E ss Si EN 2 eg g m S 2s22 8mm mmc E MAAINOIMMIAGNOD TX IN S IS LOAI d DS E be a IWD AZWA CE User Manual Macro Sensors 7300 US Rt 130 North Bldg 22 Pennsauken NJ 08110 U S A 856 662 8000 www macrosensors com Manual P N 0653 0006 0000 Rev E July 3 2013 Position Sensing o0LUIIONS Linear Rotary Spring Loaded Free Core and Custom Position Sensors x p Your Sensor Business Partner 1 Wx C x AXE Geet C 20 SENSO 2985 Diwi giton GF Howard A tenar riir Yechnmeogien dee IA PELI AST Macro Sensors LVC 4000 User Manual Page 2 of 14 enso Manual P N 0653 0006 0000 Rev E TABLE of CONTENTS 1 GENERAL DESCRIP TION e 4 2 EBECIRICAL CONNECTIONS creena isse Susie E A e Us end uui su sese RR ER roNebese pA DIEI R T KU KUIDE 5 3 FRONTPAN Ec 8 A DIP SWEACHE EH 6 5 CALIBRATION PROCEDURE E 9 EN MEE TR c c 9 6 RAS DIGITAL INTE ie iC E E 10 61 Command demit DE EU 10 O2 COMIN NS orc cess 11 7 SYNCHRONIZATION ME 12 S ERROR DETECTION ANDINDICATION H 12 9 XSENERALSPECIFIEATIONS ee eege 13 AST Macro Sensors LVC 4000 User Manual Page 3 of
11. he available LVC 4000 commands AST Macro Sensors WWW macrosensors com LVC 4000 User Manual Manual P N 0653 0006 0000 Rev E Page 11 of 14 7 SYNCHRONIZATION When multiple LVC 4000s share interconnecting wiring interference may occur between them because of differences in excitation frequency This may produce noise oscillations on the voltage or current outputs In order to prevent this the LVC 4000s can be synchronized with each other Synchronization of LVC 4000 signal conditioners is accomplished by connecting the SYNC I O terminals of each unit into a daisy chain One unit will assume Master Mode based on the priority set by the Digital Address DIP switches With each unit set to a unique address the lowest addressed unit becomes Master All other units enter Slave Mode If the current Master ceases to function the next consecutively addressed unit enters Master Mode without user intervention If a unit is hot swapped or reconnected it will enter Slave Mode In an interconnected group of units one and only one LVC 4000 is guaranteed to be Master even if duplicate addresses exist Synchronization mode is indicated by the Yellow LED for Slave Mode and the NULL Green LED for Master Mode 8 ERROR DETECTION AND INDICATION The LVC 4000 detects and reports operational failures including broken connections to the LVDT Primary and Secondary windings Error conditions are indicated as follows LEDs Primary Open cond
12. ition is indicated by a blinking Yellow LED Secondary Open condition is indicated by a blinking 7 Yellow LED Error Flag The Error Flag is an Open Collector output signal requiring an external pullup resistor The output is low transistor turned on during normal operation and high turned off for any error condition Error Output Voltage or Current Level An error condition causes the LVC 4000 Voltage or Current Output to go to a level outside of the measurement range For 0 10 VDC or 0 5 VDC ranges the error voltage is 0 5 VDC and 0 25 VDC respectively For 4 20 mADC range the error current is O mADC RS 485 Bus The getError command returns the error status AST Macro Sensors LVC 4000 User Manual Page 12 of 14 WWW macrosensors com Manual P N 0653 0006 0000 Rev E de LVC 4000 GENERAL SPECIFICATIONS Parameter Commen Input Voltage 9 30 VDC 90 mA max 24 VDC Primary Voltage nominal 3 Vrms 1 5 Vrms selectable Primary Impedance 900 min 1 5 Vrms Primary Frequency 2 5 kHz 5 kHz 7 5 KHz or 10 kHz Signal Output Voltage Output 0 10 VDC 0 5 VDC 0 5 4 5 VDC 5 VDC or 10 VDC Output Voltage Ripple 1 mV rms max 2 5KHz Excitation no Filter Output Current Ripple 10 uA rms max 2 5KHz Excitation no Filter 20 uA rms max 10KHz Excitation no Filter Output Non Linearity lt 0 1 of FSO Environmental Temp Co Gain lt 0 02 FRO C Temp Co Offset lt 0 02 FRO C Operating Temper
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