PCB Piezotronics 482C27 Manuale utente

Model 482C27

Bridge/Differential, ICP®/Voltage Sensor Signal Conditioner

Installation and Operating Manual

For assistance with the operation of this product,

contact PCB Piezotronics, Inc.

Toll-free: 800-828-8840

24-hour SensorLine: 716-684-0001

Fax: 716-684-0987

E-mail: [email protected]

Web: www.pcb.com

The information contained in this document supersedes all similar information that

may be found elsewhere in this manual.

Total Customer Satisfaction – PCB

Piezotronics guarantees Total Customer

Satisfaction. If, at any time, for any

reason, you are not completely satisfied

with any PCB product, PCB will repair,

replace, or exchange it at no charge. You

may also choose to have your purchase

price refunded in lieu of the repair,

replacement, or exchange of the product.

Service – Due to the sophisticated nature

of the sensors and associated

instrumentation provided by PCB

Piezotronics, user servicing or repair is

not recommended and, if attempted, may

void the factory warranty. Routine

maintenance, such as the cleaning of

electrical connectors, housings, and

mounting surfaces with solutions and

techniques that will not harm the

physical material of construction, is

acceptable. Caution should be observed

to insure that liquids are not permitted to

migrate into devices that are not

hermetically sealed. Such devices should

only be wiped with a dampened cloth

and never submerged or have liquids

poured upon them.

Repair – In the event that equipment

becomes damaged or ceases to operate,

arrangements should be made to return

the equipment to PCB Piezotronics for

repair. User servicing or repair is not

recommended and, if attempted, may

void the factory warranty.

Calibration – Routine calibration of

sensors and associated instrumentation is

recommended as this helps build

confidence in measurement accuracy and

acquired data. Equipment calibration

cycles are typically established by the

users own quality regimen. When in

doubt about a calibration cycle, a good

“rule of thumb” is to recalibrate on an

annual basis. It is also good practice to

recalibrate after exposure to any severe

temperature extreme, shock, load, or

other environmental influence, or prior

to any critical test.

PCB Piezotronics maintains an ISO-

9001 certified metrology laboratory and

offers calibration services, which are

accredited by A2LA to ISO/IEC 17025,

with full traceablility to N.I.S.T. In

addition to the normally supplied

calibration, special testing is also

available, such as: sensitivity at elevated

or cryogenic temperatures, phase

response, extended high or low

frequency response, extended range, leak

testing, hydrostatic pressure testing, and

others. For information on standard

recalibration services or special testing,

contact your local PCB Piezotronics

distributor, sales representative, or

factory customer service representative.

Returning Equipment – Following

these procedures will insure that your

returned materials are handled in the

most expedient manner. Before returning

any equipment to PCB Piezotronics,

contact your local distributor, sales

representative, or factory customer

service representative to obtain a Return

Warranty, Service, Repair, and

Return Policies and Instructions

Materials Authorization (RMA)

Number. This RMA number should be

clearly marked on the outside of all

package(s) and on the packing list(s)

accompanying the shipment. A detailed

account of the nature of the problem(s)

being experienced with the equipment

should also be included inside the

package(s) containing any returned

materials.

A Purchase Order, included with the

returned materials, will expedite the

turn-around of serviced equipment. It is

recommended to include authorization

on the Purchase Order for PCB to

proceed with any repairs, as long as they

do not exceed 50% of the replacement

cost of the returned item(s). PCB will

provide a price quotation or replacement

recommendation for any item whose

repair costs would exceed 50% of

replacement cost, or any item that is not

economically feasible to repair. For

routine calibration services, the Purchase

Order should include authorization to

proceed and return at current pricing,

which can be obtained from a factory

customer service representative.

Warranty – All equipment and repair

services provided by PCB Piezotronics,

Inc. are covered by a limited warranty

against defective material and

workmanship for a period of one year

from date of original purchase. Contact

PCB for a complete statement of our

warranty. Expendable items, such as

batteries and mounting hardware, are not

covered by warranty. Mechanical

damage to equipment due to improper

use is not covered by warranty.

Electronic circuitry failure caused by the

introduction of unregulated or improper

excitation power or electrostatic

discharge is not covered by warranty.

Contact Information – International

customers should direct all inquiries to

their local distributor or sales office. A

complete list of distributors and offices

can be found at www.pcb.com.

Customers within the United States may

contact their local sales representative or

a factory customer service

representative. A complete list of sales

representatives can be found at

www.pcb.com. Toll-free telephone

numbers for a factory customer service

representative, in the division

responsible for this product, can be

found on the title page at the front of this

manual. Our ship to address and general

contact numbers are:

PCB Piezotronics, Inc.

3425 Walden Ave.

Depew, NY 14043 USA

Toll-free: (800) 828-8840

24-hour SensorLineSM: (716) 684-0001

Website: www.pcb.com

E-mail: [email protected]

DOCUMENT NUMBER: 21354

DOCUMENT REVISION: B

ECN: 17900

PCB PIEZOTRONICS, INC. 3425 WALDEN AVENUE DEPEW, NY 14043-2495 PHONE 716-684-0001 FAX 716-684-0987

ICP is a registered trademark of PCB Group, Inc. KS398

43265

Rev. B

ECO-40715

SIGNAL CONDITIONER

Model 482C27

GENERAL OPERATION

MANUAL

For powering ICP

, and bridge sensors, this signal conditioner provides an effective method for

managing small numbers of sensor channels. A simple command set, entered through industry

standard interface, allows the user to generate powerful application-specific programs to automate

system testing. A front panel interface is also provided for standalone operation.

Table of Contents

Table of Contents i

1-0. INTRODUCTION AND SPECIFICATIONS 1

1-1. Introduction: Safety Considerations 1

1-2. Model 482C System Description 2

1-2.1 Model 482C ICP

Input/Output Mode, All Models 2

1-3. Block Diagram 3

1-4 Installation 3

1-4.1. Grounding Techniques 3

1-4.2 Quick Set-up Instructions 4

1-5. Operation: Standard AC Line 6

1-7. Maintenance and Repair 7

2-0. FRONT PANEL MODULE CONTROL 8

2-1. Introduction 8

2-2. Unit Initialization 8

2-3. Main Menu Format 8

2-4. Submenu Format and Command Selections 9

Reference 24

3-0. THEORY OF OPERATION 24

3-1. Sensor Excitation 24

3-2. Input Protection 24

3-3. Input Fault Detection 25

3-4. Input Interface 25

3-5. Gain 25

3-5.1 Programmable Gain 26

3-6. Normalized Output Sensitivity 26

3.7 Overload Detection and Autorange 27

3-7.1 Autorange 27

3-7.2 Overload 27

3-8. Filtering 28

3-9. RMS - DC Conversion Every Channel 28

3-10. Connector Configuration 28

3-10.1 ICP

, Voltage or Bridge Input per Channel 28

3-11 ICP

, Voltage Sensor Connection: 28

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C GENERAL OPERATION MANUAL

3-12 Bridge/Differential Sensor Connection 29

3-13 RS-232 & Ethernet connections 29

3-14 Non-Volatile Memory 29

3-15 Transducer Electronic Data Sheet (TEDS) Interface: 29

4-0. COMPUTER INTERFACE PROGRAMMING GUIDE 30

4-1. Introduction 30

4-2 RS-232 30

4-3. RS-232 Host Set-Up 30

4-4. RS-232 Rear Panel Pinout Listing 30

4-5. Ethernet Communication 30

4-6. Model 482C Communication Guidelines 38

4-7. Model 482C Unit Initialization Procedure 38

4-8. Command Summary 38

4-9. Command Format 39

4-10 Multiple Board Models 40

4-11. Commands 40

GAIN 40

SENS 40

FSCI 41

FSCO 41

INPT 42

IEXC 42

VEXC 43

FLTR 43

OFLT 44

CLMP 44

CLPG 44

SWOT 45

CALB 45

RTED 46

ALLC 46

RBIA 46

CHRD 47

STUS 47

UNIT 48

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C GENERAL OPERATION MANUAL

iii

UNID 49

AZZR 49

LEDS 50

RSET 50

AUTR 50

SAVS 51

Communication Responses 51

5-0 Wiring Information 52

5-1 Full Bridge Mode 52

5-2 Half Bridge Mode 53

5-3 Quarter Bridge Mode 54

5-3 RSE / NRSE Mode for 3 Wire Sensors 54

5-4 Connection of Triaxial Sensors 55

Appendix A: Differential MEMS Sensor Set Up Guide 56

Figure 1 Typical Block Diagram of Model 482C27.............................................3

Figure 2 ICP

Sensor Excitation........................................................................24

Figure 3 Input Fault Window Comparator with LED Indicator .......................25

Figure 4 Input Amplifier Configuration.............................................................25

Figure 5 Selectable Gain Amplifier Configuration...........................................25

Figure 6 Autoscale/Overload Window Comparator........................................27

Figure 7 Recommended Connections for Full Bridge Type Sensors............52

Figure 8 Alternate Connections for Full Bridge Type Sensors......................53

Figure 9 Recommended Connections for Half Bridge Type Sensors ...........53

Figure 10 Recommended Connections for Quarter Bridge Type Sensors...54

Figure 11 Recommended Connections for 3 Wire Type Sensor....................54

Figure A1 Settings for Differential MEMS Sensors……………………………..56

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL

1-0. INTRODUCTION AND SPECIFICATIONS

1-1. Introduction: Safety Considerations

WARNING SYMBOLS AND TERMS

The following symbols and terms may be found on the equipment described in this manual.

This symbol on the unit indicates that the user should refer to the operating instructions located in the manual.

This symbol on the unit indicates that high voltage may be present. Use standard safety precautions to avoid

personal contact with this voltage.

This symbol indicates that the test fixture, Model 482C, must be connected to earth ground via the power cord.

The WARNING heading used in this manual explains dangers that might result in personal injury or death. Always

read the associated information very carefully before performing the indicated procedure.

The Caution heading used in this manual explains hazards that could damage the instrument.

WARNING 1: The power supply/signal conditioner should not be opened by anyone other than qualified service

personnel. This product is intended for service by qualified personnel who recognize shock hazards and are familiar

with the safety precautions required to avoid injury.

WARNING 2: This equipment is designed with user safety in mind; however, the protection provided by the equipment

may be impaired if the equipment is used in a manner not specified by PCB Piezotronics, Inc.

Caution 1: Cables can kill your equipment. High voltage Electro Static Discharge (ESD) can damage electrical

devices. Similar to a capacitor, a cable can hold a charge caused by triboelectric transfer, such as that which occurs in

the following:

•Laying on and moving across a rug.

•Any movement through air.

•The action of rolling out a cable.

•Contact to a non-grounded person

The solution for product safety: 1) Connect the cables only with the AC power off. 2) Temporarily “short” the end of

the cable before attaching it to any signal input or output.

Caution 2: ESD considerations should be made prior to performing any internal adjustments on the equipment. Any

piece of electronic equipment is vulnerable to ESD when opened for adjustments. Internal adjustments should therefore

be done ONLY at an ESD-safe work area. Many products have ESD protection, but the level of protection may be

exceeded by extremely high voltage that is typically present in normal situations.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL

EQUIPMENT RATINGS

For complete specifications, please refer to the enclosed Specification Sheet. This equipment operates optimally at +32

to +120°F (0 to +50°C), in an environment having <85% relative humidity. Its line power frequency range is 50/60 Hz.

The Model 482C requires 10-15 VDC with 500 mA to operate. In turn, it supplies 24 VDC, 2 to 20 mA excitation

voltage to connected ICPor in-line charge converters sensors. The unit gets its power via AC power adaptor, 12 VDC

battery pack, 28 VDC or a car adapter which plugs into the receptacle on the rear panel.

1-2. Model 482C System Description

The model 482C27 is a four-channel, bench top signal conditioner that offers low noise operation and

simplicity of use. Each channel is selectable between two input types: Bridge/MEMS or ICP®/Voltage.

For the bridge inputs, this model offers up to 12 VDC unipolar or bipolar excitation voltage for use with

differential, single-ended, MEMS and bridge sensors like load cells and reaction torque sensors. This mode

features incremental gain of x0.1 to x2000, normalization, shunt calibration and AC/DC coupling. In dc

coupled mode, auto-balance and auto-zero functions automatically compensate the internal circuitry to

provide a zero based output.

The bridge inputs are compatible with full bridge sensors as well as ½ and ¼ bridge sensors with internal

switchable bridge completion resistors. The maximum current available is 30mA, with a current limit set at

40mA to prevent damage from inadvertent shorting.

For the ICP® inputs, the model offers 1 to 20 mA of constant current excitation to power ICP sensors or in-

line ICP® charge converters. This model features incremental gain of x.1 to x200, normalization, and AC/DC

coupling. In dc coupled mode, an auto-zero function is available to automatically compensate the internal

circuitry to provide a zero based output. In Voltage input mode current excitation is set to 0 mA (off).

The base unit of this model is powered from 9 to 18 VDC but is supplied with a universal voltage, AC power

adapter. An optional auto lighter adapter (488A13) is also available.

Model 482C27 offers the following:

•Provides Sensor Excitation Voltage or ICP® Power

•Compatible with Full, ½, and ¼ Bridge Sensors

•Suitable for Conditioning Any Voltage Input Signals

•AC/DC Coupling

•Auto Zero and Auto Balance Functions

•Digital Data Output

•Gain of 0.1 to 2000 for bridge inputs

•Gain of 0.1 to 200 for ICP®/voltage inputs

•Menu-driven Dot Matrix Display

•Keypad, RS-232, and Ethernet Control

•Remote control via either RS-232 or Ethernet using the supplied software

•compatible with PCB’s line of dc accelerometers, such as models 3901 and 3741

1-2.1 Model 482C ICP

Input/Output Mode, All Models

The Model 482C contains a regulated 24 VDC power supply that provides constant current for up to 4 individual

channels. Both the output and input connections utilize BNC connectors and are brought out through the rear panel.

MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL

1-3. Block Diagram

Figure 1 Typical Block Diagram of Model 482C27

1-4 Installation

Model 482C comes in the form of a standard box. The box should be located in such a way as to allow convenient

access to the power outlet for disconnect purposes. Since these units have low power consumption, they can be located

in confined environments.

1-4.1. Grounding Techniques

Integrating the Model 482C unit into an application that links the outputs to other test equipment powered by line

voltages may lead to errors or loss of signal-to-noise ratio due to ground loops. The evidence of ground loops is easily

seen whenever the fundamental frequency (50 or 60 Hz) or a multiple of the fundamental frequency is present in the

system when the sensors are “at rest.” In order to maintain the operating specification of noise and reduce the effects of

line interference, proper grounding techniques should be used. The following procedure may be helpful:

1. Make sure the signal ground lines of all equipment are tied together. The signal grounds of the channels are typically

tied together via the case of the input and output BNC connectors. The individual channels of the Model 482C have

their signal ground line tied together internally at the power supply.

Gain x1, x10

Input filter

order Output filter

order

Continuous Gain

0.1 – 200x

ICP Current Source /

Input Fault detect

Overload

Detection/

ADC

ICP/Voltage

Input

AC/DC

DC offset

correction

-Vexc

sense

Output

+Vexc

+sense

AC/DC

coupling

+sig

-sig

Input filter

order

Gain x1, x5

Bridge

Select

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