Omega Products LD600-100 Installation Manual

One Omega Drive, Box 4047
Stamford, CT 06907-0047
[phone] Telex: 996404 Cable: OMEGA FAX: [phone]

Operator’s Manual

LD200/300/400/500/600
SERIES LINEAR VARIABLE
DISPLACEMENT
TRANSDUCERS

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One Omega Drive, Box 4047
Stamford, CT 06906-0047
[phone] Telex: 996404
FAX: [phone]

One Omega Drive, Box 4047
Stamford Connecticut 06907-0047

Call OMEGA Toll Free*
Sales: 1-800-82-66342 / 1-800-TC-OMEGA
Customer Service: 1-800-622-2378 / 1-800-622-BEST
Engineering Assistance: 1-800-872-9436 / 1-800-USA-WHEN
*In CT: [phone] CABLE: OMEGA EASYLINK: 62968934
And International TELEX: 996404 FAX: [phone]

Return Requests/lnquiries

Direct all warranty and repair requests/inquiries to OMEGA Customer Service Depaltment,
telephone number [phone]. BEFORE RETURNING ANY INSTRUMENT, PLEASE
CONTACT THE OMEGA CUSTOMER SERVICE DEPARTMENT TO OBTAIN AN AUTHORIZED
RETURN (AR) NUMBER. The designated AR number should then be marked on the outside
of the return package.

To avoid processing delays, also please be sure to include:

1. Returnee’s name, address, and phone number.

2. Model and Serial numbers.

3. Repair instructions.

OMEGA’s policy is to make running changes. not model changes, whenever an improvement is
possible. That way our customers get the latest in technology and engineering.

OMEGA

®

is a registered trademark of OMEGA ENGINEERING, INC.

© Copyright 1990 OMEGA ENGINEERING, INC. All rights reserved including illustrations. Nothing
in this manual may be reproduced in any manner, either wholly or in part for any purpose
whatsoever without written permission from OMEGA ENGINEERING, INC.

Printed in U.S.A

M1120 / 1289

WARRANTY

OMEGA warrants this unit to be free of defects in materials and workmanship and to give satisfactory service for a period
of 13 months from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one
(1) year product warranty to cover handling and shipping time. This ensures that our customers receive maximum
coverage on each product. If the unit should malfunction, it must be returned to the factory for evaluation. Our Customer
Service Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon
examination by OMEGA, if the unit is found to be defective it will be repaired or replaced at no charge. However, this
WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of being damaged as a
result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or
other oporating conditions outside of OMEGA’s control. Components which wear or which are damaged by misuse are
not warranted. Those include contact points, fuses, and triacs.

THESE UNITS ARE INHERENTLY DANGEROUS AND ARE INTENDED TO BE INSTALLED AND USED ONLY BY
QUALIFIED PERSONNEL. NO WARRANTY EXTENDED HERE IN WILL APPLY IF SUCH UNIT IS INSTALLED OR USED
BY UNQUALIFIED PERSONNEL. THERE ARE NO WARRANTIES EXCEPT AS STATED HEREIN. THERE ARE NO OTHER
WARRANTIES EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND OF FITNESS FOR A PARTICULAR PURPOSE. OMEGA ENGINEERING, INC. IS NOT
RESPONSIBLE FOR ANY DAMAGES OR LOSSES CAUSED TO OTHER EQUIPMENT, WHETHER DIRECT, INDIRECT,
INCIDENTAL, SPECIAL OR CONSEQUENTIAL WHICH THE PURCHASER MAY EXPERIENCE AS A RESULT OF THE
INSTALLATION OR USE OF THE PRODUCT. THE BUYER’S SOLE REMEDY FOR ANY BREACH OF THIS AGREEMENT
BY OMEGA ENGINEERING, INC. OR ANY BREACH OF ANY WARRANTY BY OMEGA ENGINEERING, INC. SHALL NOT
EXCEED THE PURCHASE PRICE PAID BY THE PURCHASER TO OMEGA ENGINEERING, INC. FOR THE UNIT OR UNITS
OR EQUIPMENT DIRECTLY AFFECTED BY SUCH BREACH.

EVERY PRECAUTION FOR ACCURACY HAS BEEN TAKEN IN THE PREPARATION OF THIS MANUAL, HOWEVER,
OMEGA ENGINEERING INC. NEITHER ASSUMES RESPONSIBILITY FOR ANY OMISSIONS OR ERRORS THAT MAY
APPEAR NOR ASSUMES LIABILITY FOR ANY DAMAGES THAT RESULT FROM THE USE OF THE PRODUCTS IN
ACCORDANCE WITH THE INFORMATION

CONTAINED IN THE MANUAL.

TABLE OF CONTENTS

LD200/300/400/500/600

SECTION PAGE

SECTION 1

Description .......................................................... 1

SECTION 2

Unpacking .......................................................... 2

SECTION 3

Operation ............................................................ 2

SECTION 4

Transducer Mounting Information ...................... 2

SECTION 5

LVDT Selection Factors ...................................... 3

SECTION 6

Wiring .................................................................. 3

SECTION 7

Specifications ..................................................... 4

NOTES

i

1

NOTES

LD200/300/400/500/600

LINEAR VARIABLE

DISPLACEMENT

TRANSDUCERS

RANGE (mm)

1.25

2.5
5

7.5

10

15
25

50
100
150
250
300

1

2.5
5

1

2.5
5

15
25

50
100
150
250
300

MODEL NO.

1.25

2.5

LD200 - 5

7.5
10

15
25
50

LD300 - 100

150
250
300

1

LD400- 2.5

5

1

LD500- 2.5

5

15
25
50

LD600- 100

150
250
300

FEATURES

RUGGED - Designed for use on machine

tools and vehicles where infinite resolution
and high repeatability are very important
characteristics.

LONG STROKE AC - High accuracy and our
longest stroke up to ±:12". Armatures are
spring loaded up to 6" length. AC operation
provides the highest accuracy and
performance.

MINIATURE DC - Supplied with delrin
bearings these miniature transducers provide
near frictionless motion to detect the smallest
displacement.

PRECISION GAUGING - Designed for
industrial automation, these transducers have
hardened steel shafts, O-ring seals and
titanium push rods to give highly repeatable
readings.

LONG STROKE DC - These transducers
include a custom hybrid IC which provides a
mV/mm output. This enables extremely
simple setup and operation with standard DC
amplifiers.

SECTION 1 DESCRIPTION

The Omega®LD200/300/400/500/600 series of linear variable
displacement will measure a wide range of displacement. The
following models are available:

2

SECTION 2 UNPACKING

Remove the Packing list and verify that all equipment has been
received. If there are any questions about the shipment, please call
OMEGA Customer Service Department at 1-800-622-2378.

Upon receipt of shipment, inspect the container and equipment for
any signs of damage. Take particular note of any evidence of rough
handing in transit. Immediately report any damage to the shipping
agent.

NOTE
The carrier will not honor any claims unless all shipping
material is saved for their examination. After examining and
removing contents, save packing material and carton in the
event reshipping is necessary.

SECTION 3 OPERATION

OMEGA'S® LD200/300/400/500/600 displacement transducers are
essentially miniature transformers, have one primary winding, two
symmetrically wound secondary coils, and an armature core that is
free to move along the linear axis in precision bearing guides. A
push rod connects the monitored component to the armature core,
such that the displacement of that component moves the core off­center.

A voltage is applied across the primary winding and the EMF
induced in the magnetic circuit produces corresponding voltages in
the secondary windings, which are connected differentially to
produce a zero output signal when the armature core is in its central
position. When the core is displaced off center in either direction,
the efficiency of transformation in the secondary winding on that
side is increased and decreases in the other secondary coil. This
results in a positive (+ve) voltage output signal when the core
moves off center in one direction and a negative (-ve) voltage output
in the other direction. The intensity of the output signal is directly
proportional to the linear displacement of the core and, hence, of the
monitored component.

SECTION 4 TRANSDUCER MOUNTING INFORMATION
CLAMPING (DISPLACEMENT TRANSDUCERS)

The clamp should be non-metallic whenever possible. If a metal
clamp is used, care should be taken to ensure that it is linear over
the entire body of the transducer.

Mounting at one end of the transducer can give rise to non-linearity
of five per cent (5%) or worse.

Where possible, all large metal parts should be at least six inches
(6") from the transducers at all times to reduce their effect on the
transducer.

PROBE TIPS (GAUGING TRANSDUCERS)

Care should be taken not to overtighten the probe tip of the
transducer. The tip should be finger tight only and a thread locking
compound used on tip to prevent movement. Any overtightening is
likely to damage the internal mechanism of the transducer and
cause poor repeatability. The tip used should be carefully selected
to prevent excessive side pressure. The maximum step height that
the tip is to climb should not exceed 0.3R of the tip.

NOTES

3

PROBE CLAMPING (GAUGING TRANSDUCERS)

When clamping the probe, care should be taken not to exceed 50Kg
point load at any point on the body of the transducer. Exceeding this
may cause distortion of the case and result in damage to the internal
components.

The most common method of clamping the transducer is to use a
split collar or sleeve arrangement to spread the load over as large
an area as possible.

CABLE OUTLET (ALL TRANSDUCERS)

Maximum Bend Radius for the cable should not be less than six
inches (6") for long life. The cable should be reinforced with
Spiroband or a protective sleeve where it is likely to sustain damage.

Support for the cable should be provided at the point where it exists
for the transducer body whenever possible.

Continuous flexing of any part of the cable should be avoided.

SECTION 5 LVDT SELECTION FACTORS

Particular attention should be made to the following factors when
selecting an LVDT for a specific application:

• Nominal transducer linear stroke (core displacement)

• Non-linearity

• Typical sensitivity

• Primary excitation requirements (voltage and frequency)

• Residual voltage at null core position

• Electrical terminations (wire leads, connector, cable length)

• Environment (temperature, humidity, vibration, etc.)

• Core dimensions and weight

SECTION 6 WIRING

The transducer cables are color coded. Connections should be
made as indicated. Refer to Figure 1.

SECTION 7 SPECIFICATIONS

LD200 LD300 LD400 LD500 LD600

(RANGE ±MM) 1.25 2.5 5 7.5 10 15 25 50 100 150 250 300 1 2.5 5 1 2.5 5 15 25 50 100 150 250 300

MECHANICAL CHARACTERlSTICS

ARIMATURE GUIDANCE NONE XXXXX

GUIDED XXXXXXX X X X X X X X

BALL BEARING XXX XXX

ARMATURE M2-6g XXX

CARRIER THREAD M3-6g X X

M4-6g XXXXX XX X X

M5-6g XXXX X X X X

OR 6-40 \UNF XXXXX XX X X

ARMATURE TYPE THREADED CORE XXXXX

CAPTIVE ARMATURE XXX

SPRING ARMATURE XXXXXXX XXX X X X X X X X

BODY DIAMETER 19mm X X X X X X X X X

20mm XXXXX

25mm XXXX

ENVIRONMENTAL CONDITIONS

MAX PRESSURE AMBIENT XXXXX XXXXXXX XXX XXX X X X X X X X

TEMPERATURE °C -20 to 80 X X X X X X X X X X X X X

-40 to 100 XXXXXXX

-55 to 150 XXXXX

ELECTRICAL CHARACTERISTICS

EXCITATION VOLTAGE 10 - 24 Vdc X X X X X X X X X X X X X

1 to 10 V RMS XXXXX

5V RMS XXXXXXX

EXCITATION FREQUENCY

1 KHZ XXXXX

2-5 KHZ XXXXX

5 KHZ XXXXX XXXXXXX

10 KHZ X X

LINEARITY

TOTAL STROKE .25% X Y X X X XXX

.30% XXXXXXX XXX X X X X X X X

SIGNAL CONDITIONERS A/C INPUT A/C INPUT D/C INPUT D/C INPUT D/C INPUT

SENSITIVITY -

SEE CALIBRATION SHEET ZERO BALANCE - SEE CALIBRATION SHEET

Figure 1. Wiring Diagram

Primary

Yellow/
Black

Black

Green
Blue

Red

White

Green

Yellow

Yellow/
Red

Red

Blue

Secondary Primary Secondary

4