RDP Group S7TW Technical Manual Download

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RDP

USTOMER

OCUMENT

Technical Manual

TRANSDUCER AMPLIFIER

TYPE S7TW

Doc. Ref CD1210Z

This manual applies to units of mod status 13 ONWARDS

Affirmed by Declaration

of Conformity

USA & Canada

All other countries

RDP Electrosense Inc.

RDP Electronics Ltd

2216 Pottstown Pike

Pottstown, PA 19465

U.S.A.

Grove Street, Heath Town,

Wolverhampton, WV10 0PY

United Kingdom

Tel (610) 469-0850

Fax (610) 469-0852

Tel: +44 (0) 1902 457512

Fax: +44 (0) 1902 452000

E-mail

[email protected]

www.rdpe.com

E-mail:

[email protected]

www.rdpe.com

Summary of Contents for S7TW

Page 1: ...y Declaration of Conformity USA Canada All other countries RDP Electrosense Inc RDP Electronics Ltd 2216 Pottstown Pike Pottstown PA 19465 U S A Grove Street Heath Town Wolverhampton WV10 0PY United Kingdom Tel 610 469 0850 Fax 610 469 0852 Tel 44 0 1902 457512 Fax 44 0 1902 452000 E mail info rdpe com www rdpe com E mail sales rdpe com www rdpe com ...

Page 2: ...tentiometer 8 3 3 Zero Input Switch 8 3 4 Span Switch Coarse gain 8 3 5 Fine Span Potentiometer 9 3 6 Filter Switch 9 4 SETTING UP PROCEDURE 10 4 1 Bipolar or Half stroke Applications 10 4 2 Offset Stroke Applications 10 5 SPECIFICATION 11 6 WARRANTY AND SERVICE 12 Index of Figures Fig 1 General view of S7TW 5 Fig 2 Connection for LVDT Transducers 6 Fig 3 Connection Schematic 6 Fig 4 Signal Cable ...

Page 3: ...ows selection of optimum bandwidth noise The differential signal amplifier circuit allows the use of long transducer cables The two wire supply output system allows use with long cables from the supply monitor with a wide range of supply voltage and high noise immunity In order to meet the primary impedance requirements of the S7TW some RDP transducers are modified to TM202 Section 2 4 refers Note...

Page 4: ...n West Midlands WV10 0PY United Kingdom We declare that the product described in this technical manual is manufactured by RDP Electronics Limited and performs in conformity to the following The Electromagnetic Compatibility Directive 2014 30 EU The RoHS Directive 2011 65 EU R D Garbett Director RDP Electronics Limited ...

Page 5: ... solenoids Note 4 ESD precautions should be used when working on the instrument circuit board with the lid removed The user should ensure he is grounded by use of a wrist strap or at least touching ground before touching any component including wires terminals or switches Note 5 The body of the transducer and the S7TW case should be grounded If the transducer fixing attachments to not provide a go...

Page 6: ...ut is not as required for example an inward moving armature causes a rising amplifier output when a falling output is required then reversing the signal high and signal low wires will correct this Fig 3 Connection Schematic Primary Input 1 Excitation High Primary Input 2 Excitation Low Secondary Output 1 Signal High Secondary Output 2 Signal Low PRIMARY COIL SECONDARY COIL Shield Gland Gland S7TW ...

Page 7: ...nsducers Some RDP transducers as standard have input impedance that is too low for use with the S7TW To correct this a modification is available TM202 for these transducers The modification code will be indicated on the transducer BUT if more than one modification is applied to the transducer the code may not be TM202 In this case contact the factory List of RDP transducers requiring TM202 D5 25 D...

Page 8: ... coarse zero switch to set the 4mA output level Refer also to Section 3 1 Avoid applying excessive tightening force to the locking nut 3 3 Zero Input Switch Toggle lever 7 of the Zero Switch when set to ON zeroes the amplifier input signal irrespective of the transducer position This simulates the transducer mid stroke zero output signal and may be used to set the mid range output level e g 12mA o...

Page 9: ...V for mod 6 onward as used in the calculations above The following table shows the band of transducer full scale output voltages appropriate to each of the 8 Gain Range Settings For example a transducer with a full scale output of 1 15V would be correctly set as gain range 2 The table below shows the V r m s signals required for full output with the Fine Span either at minimum or maximum Lever On ...

Page 10: ... Fine Span for 20mA output Note primary or secondary connections may be reversed to reverse the output polarity 7 Move the armature to the required zero position an equal but opposite displacement to that in step 6 and check the output is 4mA Trim Fine Span and zero if necessary for optimum linearity over the 4 20mA range 4 2 Offset Stroke Applications 1 Carry out steps 1 to 5 in Section 4 1 then ...

Page 11: ...utput Overload 45mA EMC Performance When subjected to radiated electromagnetic energy as EN61000 4 3 an additional error can occur at certain spot frequencies Field Strength Typical Max Error 30V m 0 5mA 3V m 0 25mA Operating Temperature 20 to 85 C to 100 C possible Dimensions 125 x 80 x 57mm 4 7 x 3 2 x 2 1 inches Weight 550g 1 2lb Seal To IP65 Gland Cable Diameter 3 to 6 5mm 0 12 to 0 25 inches ...

Page 12: ... repairs and investigations are subject to at least the minimum charge prevailing at the date of return The type and serial number of the instrument should always be quoted together with full details of any fault and services required IMPORTANT NOTES 1 No service work should be undertaken by the customer while the unit is under warranty except with the authorisation of RDP Electronics 2 If the ins...

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