S2Tech EL646 User manual

EL646 signal conditioning card
for LVDT transducers
Version : V1r1.UK dated
10/01/07 Page: 1/3
S2Tech Srl Via Imperia 28 Milano –Italy
Phone: [phone] Fax: + 39 02 89124848
e-mail: [email protected]
web: www.s2tech.it
MOD. EL646 INSTRUCTION MANUAL
CONDITIONING CARD FOR LVDT POSITION TRANSDUCERS
ELECTRICAL CONNECTIONS
Screw
terminal
Description
DS
Europe
LVDT
color code.
1
+ Output signal
2
- Output signal
3
+ Vps power supply to EL646 card
(12 or 24Vdc filtered and stabilized)
4
- Vps power supply to EL646 card
5
- Vps power supply to EL646 card
6
Earth
7
Power supply to LVDT primary
Red
8
Power supply to LVDT primary
Red
9
Secondary LVDT
Yellow
10
Connect with 11
Blue
11
Connect with 10
Green
12
Secondary LVDT
Black
• LVDT signal conditioning card mod. EL646:
Mod. EL546 are SMD signal conditioning cards that need to be
fed, from external power supply (not included), a filtered and
stabilized power supply and then they feed the Vac power
supply to the primary coils of the connected LVDT.
The extractable female connectors are included.
The EL%46 output impedance is approximately 10 Ohm.
• Color connection code of DS Europe LVDT:
DS Europe LVDT color connection code listed in the chart can
be changed without notice.
• Electrical features:
Power supply: 12Vdc o 24Vdc filtered and stabilized.
Zero regulation: 100% FS
Gain regulation: 1-1000
Working temperature: -30 up to +70°C
Power supply to LVDT primary coil: 0-30Veff., 2,5KHz.
(sinusoidal wave).
Current drawn: 60mA max. (depending on connected LVDT).
Notice: The information in this manual is subject to change without notice.DS Europe shall not be liable for technical or editorial errors or omissions
contained herein, nor for incidental or consequential damages resulting from the furnishing, performance, or use of this material. This manual contains
information protected by copyright. No part of this manual may be photocopied, or reproduced in any form, or translated without prior written consent
from DS Europe. C:\DOCUME~1\marco\IMPOST~1\Temp\notesFFF692\ManualeEl646.V0.r1.UK.doc

EL646 signal conditioning card for
LVDT transducers
Version : V1r1.UK dated
10/01/07 Page: 1/3
S2Tech Srl Via Imperia 28 Milano –Italy
Phone: [phone] Fax: + 39 02 89124848
e-mail: [email protected]
web: www.s2tech.it
• Mechanical fixing:
LVDT core:
DS Europe transducers include a core, connected to the object which position is to be measured,
together with the transducer tube probe (where there is cable output).
Core is to be mechanically guided inside the channel along the LVDT transducer inner through
hole.
Core is to be mechanically fixed to its M3 threads using shafts of amagnetic materials (stainless
steel series 300, aluminum, plastics, glass etc.) in order not to mechanically interfere with the
LVDT working.
Core is to be guided in order not to touch the inner walls of the LVDT through hole.
The color or marked side of the core is to be facing the LVDT side where there are electrical
conductors.
Core is to stay inside the LVDT channel in order to measure its position.
LVDT measuring probe:
The tube probe of LVDT can be mechanically fixed in his housing by means of screws, clamps,
vices etc.
It is advisable to ground the LVDT tube probe to reduce electrical noise.
EL646 card:
EL646 card has 4 fixing holes at its 4 corners for mechanical fixing on the customer’s machine.
DS Europe can optionally provide the EL546 on DIN rail or in IP67 box for mechanical fixing.
• Calibration procedure:
Check if electrical connections are correct and feed power supply to EL646 card.
Use a voltmeter or an oscilloscope to measure the electrical values of EL646 card.
Ground EL646 card as well as all electrical connection cable shields to the same earthing well
(avoiding current loops between different grounding wells) accordingly the local safety
regulations.
It is advisable to calibrate EL546 with the connected LVDT after approximately 30min power
supply has been fed in order to thermally stabilize the zero signal.
DS Europe transducers are working in a linear way therefore it is necessary to calibrate by zero
and full scale end points with the matching values in engineering units (mm, inches etc.) of the
line function.
Notice: The information in this manual is subject to change without notice.DS Europe shall not be liable for technical or editorial errors or omissions
2
contained herein, nor for incidental or consequential damages resulting from the furnishing, performance, or use of this material. This manual contains
information protected by copyright. No part of this manual may be photocopied, or reproduced in any form, or translated without prior written consent
from DS Europe. C:\DOCUME~1\marco\IMPOST~1\Temp\notesFFF692\ManualeEl646.V0.r1.UK.doc

EL646 signal conditioning card for
LVDT transducers
Version : V1r1.UK dated
10/01/07 Page: 1/3
S2Tech Srl Via Imperia 28 Milano –Italy
Phone: [phone] Fax: + 39 02 89124848
e-mail: [email protected]
web: www.s2tech.it
1. LEVEL trimmer setting:
Level trimmer sets the sinusoidal Vac power supply magnitude that EL646 feeds to the primary
coil of the connected LVDT: the higher the power supply on the primary coil, the higher the
signal on the secondary coils.
It is advisable to feed 6Vac to the primary.
2. ZERO trimmer setting:
Connect, to each other, LVDT conductors connected to 10 and 11 pins (Blue and Green of DS
Europe transducers) in order to have phase opposition between the two sinusoidal waves on the
two secondary coils.
Move the transducer core in order to reach a 0Vac signal (in the proximity of the mechanical
halfway of the LVDT transducer) between Yellow and Black transducer electrical conductors.
In this electrical zero position it is to be set ZERO trimmer in order to set 0Vdc output signal
between pins 1 and 2.
3. GAIN trimmer regulation (use of the two available calibration procedures):
• Micrometer:
Using a micrometer and starting from the electrical zero position, move the core up to
reaching the positive or negative mechanical transducer full scale and then set the gain
trimmer in order to set 5Vdc output signal (between 1 and 2 pins).
• Scale factor:
LVDT final test certificate lists its scale factor (mV/mm/Vac).
Scale factor allows to calculate the transducer signal (between Yellow and Black transducer
conductors) that is proportional to core position along its measuring range.
Multiply scale factor for the Vac power supply fed to the LVDT (= LEVEL regulation
between 7 and 8 pins) and also for the “mm” Full Scale to calculate the electrical signal
proportional to the mechanical full scale (between Yellow and Black transducer conductors).
Move core along the transducer channel, starting from electrical zero position, up to measure
the proportional signal between Yellow and Black transducer conductors.
Set GAIN trimmer, with core at full scale position, up to measure 5Vdc signal between pins
1 and 2.
Date
Firmware
Hardware
Description
11/01/07
First version EL646
CE Declaration
EL600 cards are satisfying the following regulations:
EN 61326-1(1997) + A1(1998) + A2(2001) + A3(2003); EN 61000-6-2(2001); EN 61000-3-2(2000) + A2(2005);EN 61000-3-3(1995) + A1(2001);
EN 61000-4-2 (1995) + A1(1998) +A2(2001); EN 61000-4-3(2002) + A1(2002); EN 61000-4-4(1995) + A1(2001) + A2(2001); EN 61000-4-5(1995)
+ A1(2001); EN61000-4-6(1996) + A1(2001); EN 61000-4-8(1993)+A1(2001); EN 61000-4-11(2004)
Notice: The information in this manual is subject to change without notice.DS Europe shall not be liable for technical or editorial errors or omissions
3
contained herein, nor for incidental or consequential damages resulting from the furnishing, performance, or use of this material. This manual contains
information protected by copyright. No part of this manual may be photocopied, or reproduced in any form, or translated without prior written consent
from DS Europe. C:\DOCUME~1\marco\IMPOST~1\Temp\notesFFF692\ManualeEl646.V0.r1.UK.doc