Omega ACC101, ACC102A, ACC103, ACC301A, ACC310 User guide

User’s Guide

Shop online at

omega.com

e-mail: [email protected]

For latest product manuals:

www.omegamanual.info

SM

ACC101, ACC102A, ACC103,

ACC301A, ACC310, ACC320

Accelerometers

omega.com [email protected]

Servicing North America:

U.S.A. Omega Engineering, Inc. Headquarters: Toll-Free: 1-800-826-6342 (USA & Canada only)

Customer Service: 1-800-622-2378 Engineering Service: 1-800-872-9436 Tel: (203) 359-1660

e-mail: [email protected]

For Other Locations Visit omega.com/worldwide

(USA & Canada only)

Fax: (203) 359-7700

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.

ACC

101,102A,103,301A,310,320

ACCELEROMETERS OPERATOR'S MANUAL

TABLE OF CONTENTS

SECTION 1 - INTRODUCTION

SECTION 2 -

·UNPACKING

3 -

SECTION

What is an Accelerometer?.................................................................................. 2

How Does it Work?

High Impedance or Low Impedance? ....

Low Impedance Micro Circuit

Noise in Accelerometers

General Characteristics ...............

UNDERSTANDING YOUR ACCELEROMETER ............

..

........................................................................................

..

..........................................

SECTION 4 - POWER REQUIREMENTS ..............................................

Power Supplies .................................................................................................. 5

SECTION 5 - CONNECTOR WIRING ...................................................

Coaxial Connectors............................................... ....... ............. ........................ 7

Two Pin Connectors..........

Four Pin Connectors

....

........................................................................................... 7

SECTION 6 - CABLING TECHNIQUES.................................................

Splicing and Extending Cables............................................................................ .8

Securing Cables

.................................................................................................. 8

SECTION 7 - MOUNTING THE ACCELEROMETER ............................ 10

Stud Mounting.. Adhesive Mounting

Adhesive Mounting Bushings..........................

Magnetic Mounting…………..........

................................................................................................... 10

.....

....................................

SECTION 8 - SPECIFICATIONS.......................................................... 1

Basic Sensitivity ................................................................................................. 14

Basic Frequency Response ........

ACC 101 Specifications .......

ACC 102A Specifications ..................

.

ACC 103 Specifications

ACC 301A Specifications .....

ACC 310 Specifications

ACC 320 Specifications .....

Notes……………………………………………………………………………………. 21

WARRANTY………………………………………………………………………….… 22

........................

.

........................

...................................................................... ..1

YOUR ACCELEROMETER ...................... 1

..........................................................

.

..

....................

.

.....................................

............................................................................. 7

..................................................

...........

.

.......

....

.

............

.

............

.

..........

......................

......................................... .3

...

...................

...

...................

....

......................................................... 14

.....................

..

............................................................... 16

...

.......................................................... 17

....

...

.........................

...

.......................................................... 19

....

...

.........................

...

............................

...............

...

.................. 3

................................. 4

.....

........................ 10

.....

....................... 11

.................... 12

...

........... 15

.................. 18

..................... 20

.....

2

.. 2

2

5

7

8

4

jj

1

SECTION 1 • INTRODUCTION

Thank you tor selecting our accelerometer for your application. You made

an

and

outstanding choice

we

are glad

to

provide you with the

by

selecting this OMEGA Engineering

best

accelerometer that technology can offer. This equipment has set the world standard excellence and should provide you with years

of

faithful

service.

Before you use your accelerometer, please read this manual to ensure

maximum performance

equipment, please

this

1

(800) 622-2378. There

you

between 8:30 AM

of

your

unit. If

you should have any problem

call our Customer Service Department

are customer service people available to help

and 5:00 PM (EST) Monday through

•

SECTION 2

Remove the there a re any questions Service Department

Upon signs transit.

The carrier

UNPACKING YOUR ACCELEROMETER

packing list

and verify that

all equipment has been received. If

about the shipment, please call OMEGA

at 1-(800) 622-2378 or (203)

receipt

of

the shipment, inspect the container

damage. Take particular note of any evidence of

Immediately report any damage

NOTE:

will

not

honor any claims unless

to

359·1660.

the shipping

all shipping material is saved

and equipment for

agent.

their examination. After examining and removing contents, save the

material and carton

The accelerometer comes packaged in

also contain a cable (

with

an i

nsulating thermal boot. The boot may already

in

the event reshipment Is

Integral or

separate). Each

necessary.

its

own protective case which may

accelerometer

accelerometer and may or may not be removable depending

model. The

package may also contain an isolating mounting stud,

washers, a magnet assembly, or other special part. Care should be

to lose

not

accommodate the accelerometer, accessories, and calibration data

any part including the case which can continue to be

Notice that the serial number and sensitivity of the unit is indicated on calibration data sheet. The data sheet also includes specifications that are endorsed for the particular

unit.

have

product

modern

the

with

at

Friday.

Customer

any

rough handling i

packing

is equipped

be

fitted over

upon

the

spacing

taken

used

sheet.

the

performance

for

n

for

the

to

SECTION 3 • UNDERSTANDING YOUR ACCELEROMETER

WHAT IS AN ACCELEROMETER?

An accelerometer is a device for measuring shock and vibration. accelerometer transduces the acceleration of an analog acceleration

HOW DOES

Piezoelectric Accelerometers

Mounted within small mass. This through acceleration, charge output

signal.

The analog signal indicates the real-time,

of

the object on which the accelerometer

IT WORK?

the

piezoelectric

the

mass exerts a force

of

accelerometer

mass

is coupled to

crystal.

the crystal that

housing

When the accelerometer

is a

the supporting accelerometer

on

the

is

directly proportional to the

object into a proportional

Instantaneous

IS mounted.

piezoelectric crystal affixed

is

crystal. This

force results

acceleration. There are many piezoelectric crystal materials that are useful

accelerometer construction. The most

Lead

Metaniobate, Lead Zirconate, There are crystals within

The materials are For more information the

also many

selected

the

to

different

accelerometer

and

physical construction used

furnish the p

about

appropriate sales bulletin

mechanical configurations

case.

articular

the construction

or

contact OMEGA Engineering, Inc

common materials used

Lead

Titanat e and natural quartz

of

iIn an

accelerometer

performance characteristics

of

your accelerometer refer

the masses

HIGH IMPEDANCE OR LOW

There

are two manufactured. These are high i Essentially, as

10mV/g

if the

output sensitivity

or

100mV/g, then you the output sensitivity is specified in units then

you are

working with

IMPEDANCE?

distinctly different types

mpedance and low

is

specified i n

are

working with

of pC/g

a high

impedance sensor.

of

accelerometers

mV/g

(millivolts

a low

impedance

(pico

coulombs

impedance"

OMEGA's (see

electronics required are built right into the transformation is signals desirable virtually

accelerometers

Figure

3-1

are

transmitted from

for

driving

all

conventional

are the low

impedance type

). A low impedance

to

detect the

case

done

at the

long

cables and it provides a proper Impedance match

data

charge

of the

sensor.

point

the

acquisition

of

sensor.

of

accelerometer

accelerometer is one in

generated

In this

by the

piezoelectric crystal

way, "high" to "low" impedance

measurement and only

The

low

impedance output

systems.

base

subjected

to an

in input

are ceramic

crystal.

and

design

desired.

.

that are

types.

per g) such

sensor. If

charge per g)

which the

low

impedance

An

to

in

to

a

is

to

2

3

Figure 3-1. Low Impedance Accelerometer

Figure 3-2 Case

LOW IMPEDANCE

OMEGA impedance filtering capabilities properties are

extremely rugged without schemes

•

ESO

•

cross

•

over voltage

When used proper ly within specified provide

NOISE IN ACCELEROMETERS

Electrical Grounding

An

accelerometer

the output

MICRO

CIRCUIT

has a broad line of micro circuits which yield

output

characteristics.

These hybrid circuits often include

and protection schemes. The specific micro

are

damage

Include:

protection

wire

protection

engineered

or degradation of performance. Additional

protection

to create the output

and

capable

limits, OMEGA accelerometers

years of reliable, trouble-free

service.

signal ground either connected

may be

designed

to the case of the accelerometer or isolated

accelerometer.

from the case of

Case Grounded Accelerometers

Case grounded accelerometers are connected electrically to any conductive surface on which they are mounted. When these units care must be due to

ground noise. grounded accelerometer be

allowed

potential

to conduct to

or noise

The case ground type accelerometer should not be where

ground

loops might be

OMEGA

Model ACC 103 is a case

(see Figure 3-2)

exercised

source.

are

used,

to avoid errors

These

cases should not

any

outside

problem,

grounded

of

with

the

case

characteristics

withstanding extremely

Grounded Accelerometer

such as

accelerometer.

selected

machinery monitoring. The

excellent low

special

desired.

high

circuit

shock

protection

will

for applications

chip

They

Case

Isolated Accelerometers

Case isolated accelerometers (see Figure any conductive surface from OMEGA are built i possibility and

ACC

of

301

ground

are case isolated

on

which

n a variety

noise

interference. OMEGA Models ACC

Figure 3-3. Case Isolated Accelerometer

GENERAL

CHARACTERISTICS

Axis of Sensitivity

Most

accelerometers are Normally, normal to accelerometer

the

accelerometer will transduce shock

the

accelerometer's mounting

will have orthogonal axes. This usually amounts

Triaxial Accelerometers

T

riaxial units essentially

into

a

single

package. signals. In conductor accelerometers

triaxial units the three sensors share

requiring

are two wire

to less than 5% of

built to be

some sensitivity

transverse

have

Triaxial units

only a

4-wire

4-wire sy st e ms.

they are mounted.

of

configurations

accelerometers.

sensitive

base. It

or

cross axis sensitivity

the major

three single axis

have

connector. Note

systems and

most

3-3) are

isolated electrically

Isolated

and

to

motion

in

one

and

vibration that i

should

be noted that the

to

motion

in

axis sensitivity.

accelerometers three

independent

the

that most

triaxial accelerometers

from

accelerometers

eliminate

101, ACC 102,

any

major axis.

s input

the other

is minor and

same

single axis

two

integrated

output

ground

are

4

5

SECTION 4

The low current analyzers, data collectors, built in.

The power or 24 volts. for accelerometers will constant current powering may impede some of range,

You supply with

POWER SUPPLIES

If the data

• POWER REQUIREMENTS

impedance type

power source.

required

Please refer

clarification

should tak the output to insure

on its

as high as10 mA

temperature range and noise

e care not to

is

used, it must incorporate

acquisition system being used does power supply then a ma nufacture s sing l e supplies.

Low impedance preferable reason, it is accelerometer. Th characteristics battery these applications where power Please refer for accelerometer should schematic power supply.

that a

often appropriate

and can be

pack versions.

to

the appropriate sales bulletins and

each OMEGA power

diagram shows the basic components

Figure

4a. - Low

of

accelerometer must

Modern

data

acquisition systems (oscilloscopes,

etc.)

often have this constant current

to drive

not be

the accelerometer

to

the specifications describing your

power requirements. Further note that

damaged

exceed

that the

even If the

or

voltage

the

operating characteristics

level.

the 10

a 2

mA

accelerometer

separate power supply must

be

powered

is

typically 2-4 mA

power

as

high

as 30 volts.

such as

mA current

constant current diode in

limit. If a custom power

Is not over-powered.

not

incorporate its

be used.

channel and multiple channel accelerometer

accelerometers

very

low noise

e battery

offered in either NiCad rechargeable

Regulated

supply.

be

connected

Impedance Accelerometer

do not

regulated power

to use a

-powered unit offers line power

must stay on for extended periods of time.

Figure

to a

require much

supply be used. For this

battery powered

the

supplies

operating

4-1

illustrates

constant

current power supply. This

within the

Interconnection

power and it is

unit

cleanest (low

are also available for

manuals

how a low

accelerometer and

by a constant

FFT

power

supply

at either

particular model

all

supply provides

15

OMEGA

Incorrect

dynamic

series

own

OMEGA

power

for powering

or

the

noise)

disposable

provided

impedance

Some data acquisition systems incorporate the power supply portion of schematic diagram. In data acquisition or “Integrated

Circuit Power" (see Figure

thes

e i

nstances, the accelerometer

system's input connector which may be labeled

4·2).

is

simply

Figure 4·2. Low Impedance Wiring Directly to Instrumentation

For those applications where the data acquisition system does not constant current power, an external power supply must be used. accelerometer should "Acceleration In connected

Figure 4-3. Low Impedance Wiring to Power Supply and

to the

be connected to

".

The

power supply connector

input of the data acquisition

the power

system

supply

labeled

being used (see Figure

''Output" should

the

fed

into

the

"Accelerometer In"

supply

Essentially, the

connector labeled

Instrumentation

the

be

4-3).

6

7

SECTION

Figure

5-1.

Coaxial

COAXIAL CONNECTORS

5-

Most single axis sensors use a connector power to the transmit shield of acceleration

TWO PIN

CONNECTORS

Some single axis accelerometers use a two pin connector in place of the typical coaxial type. accelerometer result Is that the shield of a to be wired with Figures 5-1 and

Cable

FOUR PIN CONNECTORS

Triaxial accelerometers use four pin connectors.

the

pins are used for powering _the

three

independent

three

lines. three integral senso_rs. triaxial

unit to determine the particular pinout configuration.

CONNECTOR WIRING

coaxial cable terminating

.

In these cases the center conductor is used for sending

accelerometer.

the dynamic acceleration

the coaxial cable

signal. Figure 5·1 shows the coaxial

in

the same way that

two

pins

coaxial accelerometer.

either

coaxial cable

5·2 depict

Connection

The center conductor is also used to

signal from the

accelerometer.

is used as ground for the power supply and

connection.

_ The two pins are

connected

coaxial connectors

correspond

these two

to the center conductor and

The

two pin

or with

conventional

Figure

configuration

shielded

wiring schemes.

5-2.Two-Pin Cable Connection (Twisted

Pair)

in a

coaxial

within the

are wired. The

lends itself

twisted pair wire.

In these cases, three of

three

individual

acceleration signals are also present on these same

The fourth pin Is the ground conductor and is shared among all

Please refer t o the individual specifications for your

accelerometers.

The

SECTION 6 • CABLING TECHNIQUES

As

stated,

no

special "noise treated" cables low impedance accelerometers. Signals may be Instrumentation grade two wire twisted pair shielded

SECURING

Figure conventions minimize cable or connector fatigue failures and data. Typically, low or

CABLES

6-1

cable motion.

shows

the recommended method of

impedance devices are

are

not

required when operating

run over

or coaxial cable.

securing

affected

any

conventional

cables. These

consequent loss of

by sharp

cable

with

bends

Figure

6-1.Cable

Routing

and

SPLICING & EXTENDING

Common

sense and care

cables. Of course, it is

CABLES

should

always

be used

a good

when splicing and

Idea

to tur n off all power and, if possible, disconnect the accelerometer and power this work.

When extending Male

and

a

coaxial cable, it is

female cable connectors

advisable

are

readily available (i.e., BNC to BNC, TNC to TNC, 10-32 to 10-32,etc.). These extension

cables are

available from

OMEGA.

8

Securing

to use coaxial connectors.

supply

when

for this

extending

performing

purpose

adapters

and

9

The outside ground. The splice ground or conduct to any connector loop

When working recommended that 6-2). Some heat which

shell of

(whic h is signal

noise

Interjection.

provides a

NOTE

these splicing connectors

connector shell should

outside potential or noise

common)

with permanently routed cable

the

splices be

shrink

products

water tight

sealed wi th

contai

seal over the splice.

Is the

not be allowed to touch

touch ground

heat

n heat

activated two-part

accelerometer

source. Letting

can

cause

systems it is

shrink

(see

Figure

epoxy

signal

a

ground

Figure 6-2. Cable Splice with Heat

Shrink

SECTION

For that your techniques the relative merits

7-

MOUNTING THE ACCELEROMETER

reliable vibration data, particularly

accelerometer

provide

accelerometer.

of

seven common mounting

be

for

different frequency

Figure 7-1

is a

at high

mounted correctly.

frequency response

frequencies, it is important

Different mountin

response characteristics fro

plot

describing

techniques.

g

m

the

Figure

7-1.Frequency Response

MOUNTING

Most

from the

removable,

OMEGA accelerometers

bottom

of the unit. This stud may or may not be

depending

STUD

acc el er ometer w i t h the mounting stud,

the mating hole is clean of debris and that it is

accommodate

the

mounting stud.

of

Different

Mounting Techniques

have a mounting stud protruding

upon

the model. When attaching the

you

should make certain that

deep

The surface should be

clean, and dry. Refer to Tables I and II below for the recommended flatness,

perpendicularity,

and bolt seating

torque.

For those

applications requiring light film of gr ea s e may be applied the transmission at

10

mounting

surface. The grease film provides

the

higher

frequencies.

a flat bandwidth above 4KHz, a

between

the

accelerometer enhanced

enough to

flat,

and

dynamic

11

Surface Preparation and Bolt Seating Torques

Table I

Mounting

Surface Roughness: 32 Microinch rms Armstrong A36

Balzona Super Metal

Hole Perpendicularity: 1 degree causes

0.015% error

Tap Class: 2

Ciba-Geigy 8504

Eastman 910

Hysol 309

Tridox F88

Mounting torque: 6-32, 10 in-lb

Ultra Bond 522

10-32, 20 in-lb

Cyanoacrylate Type

1/4-28, 35 in-lb

Cements

Table II

Adhesives

ADHESIVE MOUNTING

Practically bonded different tacky (such as Krazy or broken off in shear. with two part epoxy adh esi ves . R efer recommended adhesives permanent, accelerometer bonding. Further note that the durability of the adhesive fast curing

all

accelerometers

to

an

object. Temporary bonds can be achieved with many

adhesives, beeswax,

Glue). These types of bonds are easily peeled off

two part adhesives which may be used f

is

quite often better for slow curing adhesives that it is for

types.

lend themselves to be adhesively

or

cyanoacrylate

More permanent

.

Notice that there

bonds can be achieved

to

Table II above for a list of

are

many other good,

type cements

or

Mounting Bushing

ADHESIVE MOUNTING BUSHINGS

An adhesive mounting bushing may bonded

to

an object so that

accelerometer

may

be

screwed into bushing rather than into the object measured. This applications where drill into an

is

appropriate

it is

not practical

object for stud mounting. It is

for

be the the

being

those

to

also appropriate for applications where it is

anticipated

need

to be

that

the accelerometer

removed

will

periodically.

may

be

welded

The bushings adhesively should bushings to make certain

bonded

in

place.

be

taken when bonding the

no adhesive allowed to seep into the mounting

hole.

or

Care

is

bushing's

Figure 7-2.

This can bushing before bonding prevent accelerometer or bolt is

MAGNETIC MOUNTING

be

avoided

by

threading the

It to

the surface.

uncured adhesive from being

removed.

accelerometer

Additional

drawn

up

Magnets are not generally recommended for measurements above are quite adequate for lower frequency a

single accelerometer obvious requirement that the magnet

is

used

is

that the measurement point must

can stick

to

it.

measurements

to

measure a great number

A

flat magnet with smooth machined surfaces

is

recommended. This allows the

magnet

and perpendicular

to

bond efficiently surface providing good dynamic transmissibility. For those magnet does not seat well, it may magnetic bushing. Note that Series 300

stainless steel which will not rust and is

most

be

necessary to bond

adhesive

mounting

As with other mounting techniques, a

the dynamic transmissibility when

using

thin film

a magnet.

of

grease

Using horse-shoe (or U-shaped) magnets popular, should an example of magnetic

be

restricted

mounting.

to

measurements below

on

curved

Adhesiv

e

or a dummy bolt into the

care should

be

taken to

through the hole when the

5KHz.

They

and can

be

helpful when

of

points. The

be

ferro-magnetic so

mounting

to the

points

a

sizeable ferro-

bushings are made

hole

mounting

where the

of

not fer ro·magnetic.

can

be

used

to

enhance

surfaces, although

1 KHz.

See figure

7-3

for

12

13

Figure

7-3.

Magnetic

Mounting

SECTION

Figure 8-1.Typical Frequency Response

Plot

8- SPECIFICATIONS

The

performance specifications for OMEGA accelerometers defined

well bulleti accelerometer

n and

and listed in

the calibration certificate

product for

BASIC SENSITIVITY

OMEGA's

low

impedance accelerometers output sensitivity groups: 10mV/g specification represents

course,

100 Hz. Of within fixed limits.

A ±5% 100mVIg unit between verified

specification

95mV/g

at 100

the basic

This limit is

may

and 105mV/g.

Hz and

certificate.

BASIC

FREQUENCY

RESPONSE

frequency response specification

The

much

the

actual sensitivity

ypically

T

this

frequency response specification

specified frequency

response

frequency response specification is indicated

between points A and B.

frequency response specification should

sensitivity

specification.

a unit has an

frequency within a ±5% frequencies

is

Th basic

Exam ple: If frequency response specification frequency within

the

100mV/g or as low as

this

section. Refer to the

which is

more information.

are

and

100mV/g. The

the

output

of the

accelerometer

sensitivity

usually

on

this

basic

be

manufactured with a sensitivity which

varies

specified

sensitivity

The actual sensitivity for each

recorded

on the

for an

may

vary

over the

range.

for an

Figure

8·1

depicts a typical wide

accelerometer. The

actual sensitivity

of ±5% the

operating frequency

90mV/g

.

supplied with each

standardized

from

one unit to the next

at ±5%.

means that a

accelerometer's calibration

accelerometer Indicates

useable frequency

is

state

useable

not be

of

95mVIg

actual sensitivity

range

may

are very

appropriate

sales

Into two major

basic sensitivity

as measured at

particular

is

actually

unit is

how

range.

d to be ±5% over a

band

frequency

range

by the

confused with

the

at 100Hz and

at

be as high as

a a

14

15

ACC 101 SPECIFICATIO NS

Power Requirements

2 - 6 mA constant current

@ 24 to 30 VDC

Reference Sensit ivity (±12%)

100 mV/g @ 100 Hz

Frequency Range (±10%)

3 Hz - 5 kH z

Frequency Range (±3dB)

1 Hz - 10 kHz

Amplitude Range

±70 g-pk

Amplitude Linearity

<1%

Temperature Range

-10 to 200 °F (-20 to 95 °C)

Transverse Sensi t ivity

<5%

Shock Lim it

5,000 g-pk

Mounted Resonant Frequency

18 kHz

Output Impedance

100 ohms

Bias Voltage

12 VDC (typ.)

Base Strain (@250 µ-in/in)

<.008 g-pk/µ-in/in (t yp.)

Noise Fl oor (wideband)

250 µg-rms (typ.)

Weight

50 grams

Material

6061 Al

Dimensions

1.5" H x 1" Hex

Connector

Side exit 10' integral c oax ial cable to BNC

Mounting

1/4-28 removable stud

Mounting Torque

35 in-lb (3.9 N-m)

ACC 102A SPECIFICATIO NS

Power Requirements

2 - 6 mA constant current @ 24 to 30 VDC

Reference Sensit ivity (±10%)

Frequency Range (±5%)

5 Hz - 5 kH z

Frequency Range (±3dB)

2 Hz - 7 kH z

Amplitude Range

±65 g-pk

Amplitude Linearity

Temperature Range

-10 to 200 °F (-20 to 95 °C)

Transverse Sensi t ivity

<5%

Shock Lim it

5,000 g-pk

Mounted Resonant Frequency

Output Impedance

100 ohms

Bias Voltage

12 VDC (typ.)

Base Strain (@250 µ-in/in)

<.001 g-pk/µ-in/in (typ.)

Noise Fl oor (wideband)

300 µg-rms (typ.)

Weight

45 grams

Material

Welded stainless steel wit h composite polymer

Dimensions

Connector

Side exit 10' integral c oax ial cable to BNC

Mounting

10-32 captive throughbolt

Mounting Torque

20 in-lb (2.2 N-m)

100 mV/g @ 100 Hz

<1%

18 kHz

1.0" H x 1.2" dia.

16

17

ACC 103 SPECIFICATIO NS

Power Requirements

2 - 6 mA constant current @ 15 to 30 VDC

Reference Sensit ivity (±5%)

10 mV/g @ 100 Hz

Frequency Range (±5%)

3 Hz - 10 kHz

Frequency Range (±3dB)

1 Hz - 30 kHz

Amplitude Range

±500 g-pk

Amplitude Linearity

<2%

Temperature Range

-40 to 250 °F (-40 to 121 °C)

Transverse Sensi t ivity

<5%

Shock Lim it

5,000 g-pk

Mounted Resonant Frequency

50 kHz

Output Impedance

1000 ohms

Bias Voltage

7 VDC (typ.)

Base Strain (@250 µ-in/in)

Noise Fl oor (wideband)

1500 µg-rms (typ.)

Weight

16 grams

Material

303 stainless steel

Dimensions

.82" H x .5" Hex.

Connector

Side exit 10-32 connector

Mounting

10-32 removable stud

Mounting Torque

20 in-lb (2.2 N-m)

<.003 g-pk/µ-in/in (t yp.)

ACC 301A SPECIFICATIO NS

Power Requirements *

2 - 6 mA constant current @ 15 to 30 VDC

Reference Sensit ivity (±5%) *

10 mV/g @ 100 Hz

Frequency Range (±5%) *

3 Hz - 7 kH z

Frequency Range (±3dB) *

1 Hz - 10 kHz

Amplitude Range *

±500 g-pk

Temperature Range

-40 to 250 °F (-40 to 121 °C)

Transverse Sensi t ivity *

<5%

Shock Lim it *

5,000 g-pk

Mounted Resonant Frequency*

25 kHz (typ.)

Output Impedance *

1000 ohms

Bias Voltage *

7 VDC (typ.)

Base Strain (@250 µ-in/in) *

<.005 g-pk/µ-in/in (typ.)

Noise Floor (wideband) *

1500 µg-rms (typ.)

Weight

14 grams

Material

Dimensions

.85" H x .85" W x 1.1 D

Connector

Side exit 4-pin connector

Mounting

10-32 removable stud

Mounting Torque

* Each axis

Titanium

20 in-lb (2.2 N-m)

18

19

ACC 310 SPECIFICATIO NS

Power Requirements

2 - 6 mA constant current @ 24 to 30 VDC

Reference Sensit ivity (±10%)

Frequency Range (±5%)

5 Hz - 10 kHz

Frequency Range (±3dB)

2 Hz - 20 kHz

Amplitude Range

±70 g-pk

Amplitude Lineari t y

Temperature Range

-40 to 250 °F (-40 to 121 °C)

Transverse Sensi t ivity

<5%

Shock Lim it

5,000 g-pk

Mounted Resonant Frequency

>40 kHz

Output Impedance

100 ohms

Bias Voltage

12 VDC (typ.)

Base Strain (@250 µ-in/in)

.001 g-pk/µ-in/in (typ.)

Noise Fl oor (wideband)

350 µg-rms (typ.)

Weight

68 grams

Material

316L stainless steel

Dimensions

Connector

Top exit 2-pin MIL 5015

Mounting

1/4-28 removable stud

Mounting Torque

35 in-lb (3.9 N-m)

100 mV/g @ 100 Hz

<1%

1.8" H x 7/8" Hex

ACC 320 SPECIFICATIONS

Power Requirements

2 - 6 mA constant current @ 24 to 30 VDC

Reference Sensit ivity (±10%)

100 mV/g @ 100 Hz

Frequency Range (±5%)

5 Hz - 4 kH z

Frequency Range (±3dB)

2 Hz - 12 kHz

Amplitude Range

±70 g-pk

Amplitude Linearity

<1%

Temperature Range

-40 to 250 °F (-40 to 121 °C)

Transverse Sensi t ivity

<5%

Shock Lim it

5,000 g-pk

Mounted Resonant Frequency

>18 kHz

Output Impedance

100 ohms

Bias Voltage

12 VDC (typ.)

Base Strain (@250 µ-in/in)

Noise Fl oor (wideband)

350 µg-rms (typ.)

Weight

155 grams

Material

304L stainless steel

Dimensions

1.05" H x 2.2" L X 1.0" W

Connector

Side exit 2-pin MIL 5015

Mounting

1/4-28 through bolt

Mounting Torque

35 in-lb (3.9 N-m)

<.005 g-pk/µ-in/in (t yp.)

20

21

NOTES

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s 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 OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s 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. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in such a manner.

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.

RETURN REQUESTS/INQUIRIES

BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.

FOR WARRANTY RETURNS, please have the following information available BEFORE contacting OMEGA:

1. Purchase Order number under which the product was PURCHASED,

2. Model and serial number of the product under warranty, and

3. Repair instructions and/or specific problems relative to the product.

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

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.

FOR NON-WARRANTY REPAIRS,

consult OMEGA for current repair charges. Have the following information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the

COST of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems relative to the product.

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at omega.com

TEMPERATURE

MU

Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies

MU

Wire: Thermocouple, RTD & Thermistor

MU

Calibrators & Ice Point References

MU

Recorders, Controllers & Process Monitors

MU

Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

MU

Transducers & Strain Gages

MU

Load Cells & Pressure Gages

MU

Displacement Transducers

MU

Instrumentation & Accessories

FLOW/LEVEL

MU

Rotameters, Gas Mass Flowmeters & Flow Computers

MU

Air Velocity Indicators

MU

Turbine/Paddlewheel Systems

MU

Totalizers & Batch Controllers

pH/CONDUCTIVITY

MU

pH Electrodes, Testers & Accessories

MU

Benchtop/Laboratory Meters

MU

Controllers, Calibrators, Simulators & Pumps

MU

Industrial pH & Conductivity Equipment

SM

DATA ACQUISITION

MU

Communications-Based Acquisition Systems

MU

Data Logging Systems

MU

Wireless Sensors, Transmitters, & Receivers

MU

Signal Conditioners

MU

Data Acquisition Software

HEATERS

MU

Heating Cable

MU

Cartridge & Strip Heaters

MU

Immersion & Band Heaters

MU

Flexible Heaters

MU

Laboratory Heaters

ENVIRONMENTAL MONITORING AND CONTROL

MU

Metering & Control Instrumentation

MU

Refractometers

MU

Pumps & Tubing

MU

Air, Soil & Water Monitors

MU

Industrial Water & Wastewater Treatment

MU

pH, Conductivity & Dissolved Oxygen Instruments

M5097/0117