Vishay Precision Group LVD 3 Page 15 Operating And Installation Instructions Download | Manualshive

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LVDT

Signal

Conditioner

LVD

3

11

Cable

Cable

Demodulator

Amplifier

Oscillator

Gain

Bal.

24 V

Channel 1

Demodulator

Amplifier

Oscillator

Power Supply

Gain

Bal.

Channel 2

LVD 3

Output signals

Cable

Cable

24 V

Position Transducer
type LVDT

Position Transducer
type LVDT

Power Supply

Output signals

Figure

6.

System

for

position

measurement.

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Summary of Contents for LVD 3

Page 1: ...Op Ins erati tallat ng a tion i and instru LVDT uctio T Sig ons nal co onditi LV oner D 3 GB ...

Page 2: ......

Page 3: ...NS General 5 Potentiometers 5 Test sockets 5 INSTALLATION General 7 Connections 7 Set up procedure 7 Calibration 8 FAULT FINDING General 11 Transducers 11 Transducer cables 11 Signal conditioner module 12 Cables with load 13 APPENDICES 1 Table of settings 2 Declaration of Conformity ...

Page 4: ......

Page 5: ...a at surface A plug in termi ccessible at t n er module d type LVDT t annel are an ally isolated asily installed All electrical c nal block for he front pan Figure 1 designed for thus forming alogue volta from each o d on a DIN ra connections r each chann nel 1 Signal con use togethe g two channe age and a cur ther and ail or attache to LVD 3 are nel Adjustme nditioner LV LVDT Sign er with els for...

Page 6: ...e position signal is adjusted by a potentiometer in one of three ranges selected by switches Zero offset for the signal is also adjusted by a potentiometer The position signal is a current loop 4 to 20 mA and a monopolar voltage 0 to 10 V DC or a bipolar voltage 10 to 10 V DC LVD 3 4 20 mA 4 Demod Current Output Sec 1 Osc U Bal Gain high mid low 1 2 3 SW1 SW2 Sec 2 I Amplitude Control LVDT Signal ...

Page 7: ...6 kohm Current output 4 20 mA Rload 500 ohm Linearity 0 05 Offset adjust range 2 7 of range Offset drift max 2 mV Gain ranges low 2 1 5 8 differential AC input mid 5 2 15 to bipolar DC output high 14 39 Gain drift max 0 1 Filter bandwidth 125 Hz 3 dB Power supply per channel Supply voltage 24 V DC 20 Fuse 200 mA slow Continuous current 120 mA Surge current 250 mA CE conformity EMC industrial proce...

Page 8: ...de through a single plug in terminal block on one side of the LVD 3 module C om Prim Sec 1 Sec 2 Bal G ain V out LVD 3 Channel 1 V out G ain Sec 1 Sec 2 C om Bal Prim Channel 2 COM PRIM COM SEC 1 COM SEC 2 COM V OUT COM I OUT 24V 1 2 3 4 5 6 7 8 9 10 11 12 CHANNEL 1 ARTNR S N 110 171 COM PRIM COM SEC 1 COM SEC 2 COM V OUT COM I OUT 24V 1 2 3 4 5 6 7 8 9 10 11 12 CHANNEL 2 ...

Page 9: ... is set for an output signal of 10 to 10 V Then with correct adjustment 0 V will correspond to the core centre position for the connected transducer Consequently 10 and 10 V will correspond to the limits of the measurement range for the connected transducer Potentiometers Gain Adjustment of gain for the channel Bal Adjustment of zero offset for the channel Adjustment of gain and zero offset is tho...

Page 10: ...rating and Installation instructions 6 30 7 35 75 100 110 5 60 85 Mounting holes 2 x 4 mm dia The snap lock for the DIN rail can be opened with a fine screw driver Figure 4 Mechanical dimensions for LVD 3 ...

Page 11: ... 2 terminals 3 4 and 5 6 Output signals Two output signals are available for each channel one current loop output 4 20 mA from terminal 10 to terminal 9 one voltage output 0 10 V or 10 10 V at terminal 8 with 0 V reference at terminal 7 The voltage output can also be measured at test socket V out reference Com Set up procedure General Figure 5 Each channel has a separate circuit board with test so...

Page 12: ...sting the zero point Figure 5 For a position transducer type LVDT the core centre position is an accurate reference point It should correspond to the centre of the output signal range 0 V for bipolar and 5 V for monopolar voltage 12 mA for current loop Setting of this zero reference point should be performed in four steps STEP 1 Set the amplifier gain in medium range by the switches SW1 SW1 no 1 a...

Page 13: ... increase the output signal turn counter clockwise to decrease it If a sufficiently high output signal cannot be obtained the high gain range must be selected by SW1 SW1 no 3 set to ON SW1 no 2 and no 1 set to OFF If a sufficiently low output signal cannot be obtained the low gain range must be selected by SW1 SW1 no 1 set to ON SW1 no 2 and no 3 set to OFF If the gain range has been changed by SW...

Page 14: ...Operating and Installation instructions 10 ...

Page 15: ... Oscillator Gain Bal 24 V Channel 1 Demodulator Amplifier Oscillator Power Supply Gain Bal Channel 2 LVD 3 Output signals Cable Cable 24 V Position Transducer type LVDT Position Transducer type LVDT Power Supply Output signals Figure 6 System for position measurement ...

Page 16: ... is operating or not The signal paths of the system can be measured with the power on or off Transducers Use a multimeter set to resistance measurement to check that the transducer coil resistances correspond to the values in the transducer specification Generally the primary coil has the lowest resistance and the secondary coils mutually have the same resistance Check the transducer attachment an...

Page 17: ...other cases there is a fault in the oscillator and the circuit board must be changed If the fault disappeared the transducer and transducer cable must be checked with respect of short circuits If the oscillator function is correct you can proceed and check the input signals from the transducer Input signals from transducer Input signals to LVD 3 from the transducer can be checked at the test socke...

Page 18: ...rim Com must be less than 6 VAC or the transformer ratio of the transducer is not suitable for secondary feedback Output signals Disconnect the output load and check that output signals are obtained in response to transducer core movements over the entire measuring range as follows Bipolar output 10 V DC at test sockets V out Com Monopolar output 0 10 V DC at test sockets V out Com Current output ...

Page 19: ...LVDT Signal Conditioner LVD 3 15 1 3 2 SW1 ON OFF SW3 10 0 10 SW2 SEC PRIM Com Prim Sec 1 Sec 2 Bal Gain V out Fuse Component side of LVD 3 circuit board Equal for Channel 1 and Channel 2 ...

Page 20: ......

Page 21: ...ary SEC Channel 2 Primary PRIM Secondary SEC Output selection SW3 Channel 1 Monopolar 0 10 Bipolar 10 Channel 2 Monopolar 0 10 Bipolar 10 Gain adjustment SW1 Channel 1 Gain 14 39 high SW1 No 1 ON No 2 OFF No 3 OFF Gain 5 2 15 mid SW1 No 1 OFF No 2 ON No 3 OFF Gain 2 1 5 8 low SW1 No 1 OFF No 2 OFF No 3 ON Channel 2 Gain 14 39 high SW1 No 1 ON No 2 OFF No 3 OFF Gain 5 2 15 mid SW1 No 1 OFF No 2 ON ...

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Page 23: ...LVDT Sign A De nal Condition ppendix 2 eclaration o ner LVD 3 2 of Conformi ity ...

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Page 26: ... Box 423 SE 691 27 Karlskoga Sweden Phone 46 586 63000 Fax 46 586 63099 pw se vishaypg com www weighingsolutions com Document no 35181 Article no 600 382 R5 Vishay Nobel AB 2011 05 19 Subject to changes without notice ...

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