1. Manuals
  2. Brands
  3. RDP Manuals
  4. Amplifier
  5. DR7AC
  6. User's & technical manual

RDP DR7AC User's & Technical Manual

Transducer amplifier
Hide thumbs
Table of Contents

Advertisement

Quick Links

RDP C
D
USTOMER
OCUMENT
Technical Manual
TRANSDUCER AMPLIFIER
TYPE DR7AC
Doc. Ref CD2402M
Affirmed by Declaration
of Conformity
USA & Canada
All other countries
RDP Electrosense Inc.
RDP Electronics Ltd
2216 Pottstown Pike
Grove Street, Heath Town,
Pottstown, PA 19465
Wolverhampton, WV10 0PY
U.S.A.
United Kingdom
Tel (610) 469-0850
Tel: +44 (0) 1902 457512
Fax (610) 469-0852
Fax: +44 (0) 1902 452000
E-mail
info@rdpe.com
E-mail:
sales@rdpe.com
www.rdpe.com
www.rdpe.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DR7AC and is the answer not in the manual?

Questions and answers

Related Manuals for RDP DR7AC

Summary of Contents for RDP DR7AC

  • Page 1 RDP C USTOMER OCUMENT Technical Manual TRANSDUCER AMPLIFIER TYPE DR7AC Doc. Ref CD2402M Affirmed by Declaration of Conformity USA & Canada All other countries RDP Electrosense Inc. RDP Electronics Ltd 2216 Pottstown Pike Grove Street, Heath Town, Pottstown, PA 19465 Wolverhampton, WV10 0PY U.S.A.

  • Page 2: Table Of Contents

    I N D E X INTRODUCTION ....................3 Certificate of EMC conformity ............... 4 INSTALLATION INSTRUCTIONS ..............5 EMC Requirements ..................5 Unit Mounting ....................5 Connections General ..................6 Internal Controls ................... 6 Transducer connections (LVDT and half bridge) .......... 7 CONTROLS .......................

  • Page 3: Introduction

    The DR7AC is a single channel signal-conditioning unit for use with transducers requiring AC excitation and synchronous demodulation, producing a DC output voltage or current. The DR7AC incorporates a DC-DC converter ensuring that the output of the unit is electrically isolated from the supply.

  • Page 4: Certificate Of Emc Conformity

    Wolverhampton, 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 RoHS2 Directive 2011/65/EU R D Garbett...

  • Page 5: Installation Instructions

    (electrically) as possible to this point. Unit Mounting The DR7AC housing is a standard DIN rail enclosure which can clip directly to a 35 mm top hat rail. The units can be mounted side by side if in an ambient temperature up to...

  • Page 6: Connections General

    Screen Internal Controls To access internal controls the front part of the DR7AC case needs to be removed. To do this, use a small screw driver to gently press in the clips behind terminal 1-4 and 13-16. At the same time pull forward the front of the case. The front of the case and pcb assembly should now slide forward.

  • Page 7: Transducer Connections (Lvdt And Half Bridge)

    Shield See fig. 1 for pin designations. Most RDP LVDT transducers also have a BLACK wire. This is not required with the DR7AC amplifier and should be insulated and left unconnected. If the above configuration does not give the required output phase (i.e. the output rises for outward transducer movement instead of falling);...

  • Page 8: Voltage/Current Output

    (0.230/5) x 1 x 50=2.3V The standard excitation of the DR7AC is 1V, 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 2.3V would be correctly set as gain range 3.

  • Page 9: Fine Zero (On Front Panel, Labelled Zero)

    Zero Input SW2 toggle 6 which, when switched to ON, zero’s the signal, input voltage to the amplifier irrespective of transducer position. This enables a true amplifier zero to be realised. Fine Zero (On front panel, labelled ZERO) A screwdriver-adjusted, 25-turn potentiometer allowing adjustment of output zero by ±1V to ±4V depending on Fine Gain setting.

  • Page 10: Setting Up Procedures

    15-minute warm-up period (for maximum accuracy). 4.1.3 Switch on the ZERO INPUT switch (SW2 toggle 6) and adjust the ZERO controls on the DR7AC for either 0 volts or 12 mA output (depending on which output is being used). Switch off the ZERO INPUT switch.

  • Page 11: Specification

    SPECIFICATION Supply 9 to 36 V DC 250 mA max (Isolated from output) Voltage Output ±10V into 2k Current Output- 4-20mA into 100/550 max. Overload internally limited to 30mA max. This is an active output that should not be connected to any external power supply as this will damage unit.

  • Page 12: Warranty And Service

    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 instrument is to be returned to R.D.P. Electronics for repair, (including repair under warranty) it is essential that it is suitably packed and that carriage is insured and prepaid.

Table of Contents