RDP Group D5 Series User manual

RDP Customer Document
Technical Manual
DISPLACEMENT TRANSDUCERS
D5 & D6 SERIES
Doc. Ref CD1064D
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 [phone]
Fax [phone]
Tel: [phone]
Fax: [phone]
E-mail [email protected]m
www.rdpe.com
E-mail: [email protected]
www.rdpe.com

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OPERATION MANUAL FOR THE D5 AND D6 SERIES OF DISPLACEMENT
TRANSDUCERS
1. INTRODUCTION
Our standard range of AC energised LVDTs are for use in many applications including
those where ambient temperature or vibration are too high to allow the option of integrated
electronics. These AC LVDTs are a compact short stroke series and can be used
whenever physical space is limited.
The D5 and D6 requires separate signal conditioning and will deliver its optimum
performance when energised with between 0.5V and 7V rms at 5kHz using a high quality
carrier amplifier, such as those available from RDP.
The D5 and D6 are available as either unguided or spring return versions.
Type Suffix Outline Drawing
D5, unguided, no cable K D12654
D5, unguided, end exit cable HK D12657
D6, unguided, end exit cable U D16236
D5, unguided, side exit cable HKRA D13427
D6, unguided, side exit cable URA D16572
D5, spring return, end exit cable AG D11662
D6, spring return, end exit cable A D16566/D16568/D16340
D5, spring return, side exit cable AGRA D12346
D6, spring return, side exit cable ARA D16567/D16569/D16341
2. HANDLING PRECAUTIONS
2.1 Do NOT pull the cable.
2.2 The cable should be positioned away from moving components and correctly
protected and supported.
2.3 If the cable is flexed, then a minimum bend radius of 150 mm should be maintained.
2.4 Protect the transducer from extreme shock or vibration.
2.5 Ensure the transducer pressure rating is not exceeded.
2.6 Do not energise with a voltage higher than 7 volts rms.
2.7 Do not use below -20ºC or above 100ºC.
3. INSTALLATION

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3.1 Mount the transducer by clamping the body. A suitable mounting method is with the
body clamped by a split block type of clamp as shown below:
3.2 On a free armature version, the armature (probe) should be mounted on the moving
part to be measured so that the armature moves centrally in the bore of the
transducer body.
3.3 On a spring return version, the probe tip is positioned against the part to be
measured.
3.4 The standard cable has a polyurethane sheath (jacket) with an overall copper
screen (shield). It has a diameter of 2.9/3.25 mm and a length of 2m (unless
ordered with special cable length).
4. ELECTRICAL CONNECTIONS
4.1 The D5 and D6 transducer requires an oscillator –demodulator type instrument
such as one of the following RDP instruments: S7AC, S7M, S7TW, 621, DR7AC,
E309, E725-AC.
Note: the black wire is not used when connecting to RDP instrumentation. Ensure that this
wire is insulated: it must not be allowed to short to other connections or screen.
The yellow and green are in-phase when the probe is fully extended.
4.2 The cable screen (shield) is not connected to the body of the transducer. It should
be grounded at the instrument.
4.3 If it is ever required to change the phase relationship eg change from standard
positive display or signal voltage for a probe movement outward from null to a
negative display, then simply reverse the energisation connections at the instrument
connector.
5. CALIBRATION

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Full calibration details of a D5 and D6 transducer with an RDP instrument are contained in
the Technical Manual for the particular instrument.
The general principles are:
5.1 Zero the instrument.
5.2 Move the transducer actuator (probe tip) to its centre stroke (null) position. The
instrument will read zero or output zero voltage (depending on type).
5.3 Move the actuator to the full stroke position by using a micrometer, slip gauge or
similar precision method.
5.4 Adjust the gain (span) of the instrument to obtain the requested full-scale display, or
output, from the instrument.
6. MAINTENANCE AND INSPECTION
6.1 The transducer is fairly well protected from water splash, oil and dust by the rubber
gaiter, where fitted. This gaiter should be regularly inspected to ensure it is
functioning correctly and is not torn or holed.
6.2 Check that the cable is undamaged.
6.3 The insulation resistance, between primary and secondary coils and between coils
and case, should be a minimum of 100M ohm.
6.4 Check that the black core, when not used, is correctly insulated.
7. WARRANTY AND SERVICE

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WARRANTY.
R.D.P. Electronics products are warranted against defects in materials or workmanship.
This warranty applies for one year from the date of delivery. We will repair or replace
products that prove to be defective during the warranty period provided they are returned
to R.D.P. Electronics.
This warranty is in lieu of all other warranties, expressed or implied, including the implied
warranty of fitness for a particular purpose to the original purchaser or to any other person.
R.D.P. Electronics shall not be liable for consequential damages of any kind.
If the instrument is to be returned to R.D.P. Electronics for repair under warranty, it is
essential that the type and serial number be quoted, together with full details of any fault.
SERVICE.
We maintain comprehensive after-sales facilities and the instrument can, if necessary be
returned to our factory for servicing.
Equipment returned to us for servicing, other than under warranty, must be accompanied
by an official order as all 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 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. R.D.P. Electronics can accept no liability whatsoever for damage
sustained during transit.
3. It is regretted that the above warranty only covers repairs carried out at our factory.
Should the instrument have been incorporated into other equipment that requires
our engineers to perform the repair on site, a charge will be made for the engineer's
time to and from the site, plus any expenses incurred.
The aforementioned provisions do not extend the original warranty period of any product
that has been either repaired or replaced by R.D.P. Electronics.
THIS WARRANTY MAY BE NULL AND VOID SHOULD
THE CUSTOMER FAIL TO MEET OUR TERMS OF PAYMENT.