Ectron 451 Manuale utente

INSTRUCTION MANUAL

MODEL 451

LVDT AND RVDT

SIGNAL CONDITIONER

The information contained in this manual is proprietary. Permission to reproduce all or

part must first be obtained in writing from this company.

Ectron Corporation reserves the right to make specification changes at any time.

LIFE-SUPPORT POLICY: Ectron products are not authorized for use in life-support

devices or systems without the express, written approval of the President of

Ectron Corporation.

Please send corrections and suggestions to [email protected].

Ectron Corporation 8159 Engineer Road

858-278-0600

858-732-8159

Fax: 858-278-0372

www.ectron.com

[email protected]

All Ectron instruments are warranted against defects in material and workmanship for one year

from the date of shipment to the original purchaser. Ectron agrees to repair or replace any

assembly or components (except expendable items such as fuses, lamps, batteries, etc.) found to

be defective during this period. Ectron's obligation under this warranty is limited solely to

repairing or replacing, at its option, an instrument that in Ectron's sole opinion proves to be

defective within the scope of the warranty when returned to the factory or to an authorized

service center. Transportation to the factory or service center is to be prepaid by the purchaser.

Shipment should not be made without the prior authorization of Ectron. This warranty does not

apply to products repaired or altered by persons not authorized by Ectron, or not in accordance

with instructions furnished by Ectron. If the instrument is defective as a result of misuse,

improper repair, alteration, neglect, or abnormal conditions of operation repairs will be billed at

Ectron's normal rates. Ectron assumes no liability for secondary charges of consequential

damages as a result of an alleged breach of this warranty; and in any event, Ectron's liability for

breach of warranty under any contract or otherwise shall not exceed the purchase price of the

specific instrument shipped and against which a claim is made. This warranty is in lieu of all

other warranties, expressed or implied; and no representative or person is authorized to represent

or assume for Ectron any liability in connections with the sale of our products other than is set

forth herein.

If a fault develops, notify Ectron or its local representative, giving full details of the difficulty.

Include the model and serial numbers. On receipt of this information, a service date or shipping

instructions will be furnished. If shipment is indicated, forward the instrument, freight prepaid,

to the factory or to the authorized service center indicated in the instructions.

Instruments should be tested upon receipt. If there is any damage, a claim should be filed with

the carrier. A full report of the damage should be obtained by the claim agent, and that report

should be forwarded to Ectron. Ectron will advise the disposition to be made of the equipment

and arrange for repair or replacement. Please include model and serial numbers in all

correspondence.

GENERAL

PROCEDURE FOR SERVICE

DAMAGE IN TRANSIT

TABLE OF CONTENTS

PAGE

Warranty

Inside Front Cover

Section I, Description

General 1-1

Modes of Operation 1-1

Other Features 1-2

Enclosures 1-2

About This Manual 1-2

Section II, Specifications

Input 2-1

Dynamic Response 2-1

Output 2-1

Excitation 2-1

Input Power 2-1

Calibration and Alignment 2-1

Environment 2-2

Physical Parameters 2-2

Compatibility 2-2

Notes 2-2

Section III, Operation

General 3-1

View Angle 3-1

Connections and Enclosures 3-1

Controls 3-2

Updating Memory 3-3

Time Out 3-3

Power On 3-3

Operating Screens 3-3

Operation Scheme and Main Menu 3-4

First Screen 3-4

Gain-mode Setup 3-5

Example-mode Setup 3-5

Scale-mode Setup 3-7

Autozero 3-8

Zero Setup 3-9

Filter Setup 3-9

Cal 3-9

Other 3-10

Secondary Menu 3-10

Excitation Setup 3-10

Units of Measure 3-11

Reset System 3-12

Align 3-12

System Info 3-12

Other Exit 3-12

ENCLOSURES

Model R418-7 3-13

Models 4001 and 4005 3-14

Model E408-6 3-16

Model R408-14 3-17

Section IV, Applications

General 4-1

Selecting the Operation Mode to Use 4-3

Determining the Active Mode 4-4

Crosstalk 4-5

Output Noise 4-5

Phase Control 4-5

Ground Connections 4-5

Emi Protection 4-6

Vehicle Applications 4-6

Response Time 4-6

Update Rate 4-7

Output Polarity 4-7

Null Improvement 4-7

Section V, Theory of Operation

Analog Input 5-1

Firmware 5-1

Gain Mode 5-1

Scale Mode 5-2

Example Mode 5-2

Calibration 5-2

PAGE

Table of Contents

Model 451

Section VI, Alignment

General 6-1

Equipment Required 6-1

Procedures 6-1

Output Alignment 6-1

Input Alignment 6-3

Section VII, Parts Lists

Names of Manufacturers 7-1

Model E408-6 Enclosure 7-2

Model R408-14 Enclosure 7-3

Model R418-7 Series Enclosure 7-4

Model R418-M1028C Enclosure 7-5

Figures

Model 451 1-1

Figure 3-1, Typical LVDT Connection to the Model 451 3-2

Figure 3-2, Main Menu 3-4

Figure 3-3, Secondary Menu 3-11

Figure 4-5, Typical Output Filter 4-5

Figure 6-1, Output Alignment 6-2

Figure 6-2, Input Alignment 6-3

Tables

Table 3-1, Connections 3-1

Table 3-2, Transducer Sensitivity Ranges

(mV/V/Unit of Displacement) 3-5

Table 3-3, Adapting Ectron Enclosures for

Model 451 Operation 3-13

Table 3-14, Model R418-7 14-Channel Enclosures 3-14

Table 7-1, List of Manufacturers 7-1

Schematics and Drawings

Model E408-6Y (Internal-12-V-dc Power Supply) 408-600

Model E408-6X (Internal-28-V-dc Power Supply) 408-601

Model R408-14Y (Internal 12-V-dc Power Supply 408-605

Model R408-14X (Internal 28-V-dc Power Supply 408-606

Model R418-7 Series Rack-mount Enclosure 418-627

Model R418-7-M1028C Rack-mount Enclosure 419-605

Model 451 Outline Dimensions 451-900

Model 451 Operational State Diagram

PAGE

Model 451

Table of Contents

iii

Table of Contents

Model 451

Section I

Description

GENERAL

The Model 451 LVDT signal-con-

ditioner produces an analog volt-

age that represents the

displacement of the shaft of an

LVDT (linear variable displace-

ment transformer). This voltage

and the displacement, in either

milli-inches, millimeters, or de-

grees, are displayed on a backlit

front-panel display. There are three

independent modes of operation

making it the most versatile LVDT-

signal conditioner produced today.

MODES OF OPERATION

The Model 451 is always in one

of three modes of operation:

GAIN

EXAMPLE

, or

SCALE

To activate an inactive mode, the

user simply dials the the knob until

the desired mode is displayed and

answers

YES

to a screen prompt.

The unit then guides the user

through the setup for that particular

mode.

In the

GAIN

mode, the desired

gain of the Model 451 and the

transducer sensitivity are entered,

and it is ready for use.

In the

EXAMPLE

mode, the user places the shaft of the LVDT at a position and “captures”

that point and assigns a voltage to it. This is done a second time for another position, and

after the transducer sensitivity is entered, the unit is ready for use.

In the

SCALE

mode, the user keys in two desired displacement points and corresponding

voltage points, and like the other two modes, after the transducer sensitivity is entered, the

unit is ready to use.

OTHER FEATURES

In addition to the mode of operation, the Model 451 offers complete control over a wide

variety of functions to truly make it unique.

Zero

Two means of controlling zero are provided: manual

and autozero. In manual zero, the user can dial in the

Model 451

LVDT Signal Conditioner

1-1

amount of offset desired and either view the amount of

offset or view the total offset (zero offset plus offset

due to input signal) at the output. When zero is “on,”

the user simply presses the display once to go directly

to autozero so that the unit can be quickly autozeroed.

If zero is not “on,” pressing the display once, turning

the encoder until autozero is displayed and pressing the

display again will turn zero on and initiate the autozero.

Filter

Four input-filter positions are provided to aid in eliminating

undesired signals. They are 1, 10, and 100 Hz in addition

to wideband (WB), which is approximately 300 Hz.

Cal

Both input (in terms of displacement) and output (in

terms of voltage) cals are provided.

Excitation

Two voltages and five frequencies are provided.

Units of Measure

Three units of measure are provided: milli-inches and

millimeters for linear measurements and degrees for ro-

tational measurements.

Alignment

Means to completely align the Model 451 are provided.

ENCLOSURES

Ectron manufactures several enclosures for its product line of ruggedized signal conditioners

and condtioner-amplifiers. These include the Models E408-6, R408-14, R418, 4001, and

4005. The Model 451 as well as the Models 352, 418, T418, 428, and 441A will operate

side by side in any of these enclosures.

ABOUT THIS MANUAL

The following sections are in this manual:

Specifications

This is a complete technical description of the

Model 451 and the performance that is guaranteed.

While the performance specifications are the best in

LVDT signal conditioning, they are conservative. The

user may find that a particular unit will perform well

beyond specification.

Operation

Here the user will find complete instructions to use the

Model 451. An operational-state diagram enhances the

discussion. Also discussed are the various enclosures

available for the Model 451 and other 352 and 400

Series units.

Applications

Because the Model 451 is designed as a universal

LVDT-signal conditioner, it would be impossible to

address every possible use for this product. Rather,

this section is written to help the user get the most

from the data resulting from using the Model 451.

Concerns about cabling, shielding, common-mode

voltage, etc. are addressed.

Description

Model 451

1-2

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