Omega Products OM2-160 Installation Manual

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®

User’s Guide

OM2-160

Signal Conditioner System

Servicing

North America:

USA:

ISO 9001 Certified

One Omega Drive, Box 4047
Stamford, CT 06907-0047
Tel: [phone]
FAX: [phone]
e-mail: [e-mail]

Canada:

976 Bergar
Laval (Quebec) H7L 5A1
Tel: [phone]
FAX: [phone]
e-mail: [e-mail]

For immediate technical or

application assistance:

USA and Canada:

Sales Service: 1-800-826-6342 /
1-800-TC-OMEGA

SM

Customer Service: 1-800-622-2378 /
1-800-622-BEST

SM

Engineering Service: 1-800-872-9436 /
1-800-USA-WHEN

SM

TELEX: 996404

EASYLINK: 62968934 CABLE: OMEGA

Mexico and Latin America:

Tel: [phone]
FAX: [phone]
En Espan~ol: [phone]-7803
e-mail: [e-mail]

omega.com

OMEGAnet®On-Line Service Internet e-mail

http://www.omega.com [e-mail]

OMEGA

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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 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 which wear are not warranted, including but 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 it will be as specified and free of defects. OMEGA MAKES
NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER,
EXPRESS 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.

USA

MADE

IN

8 Specifications

NOTES

8-8

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing
certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device
upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts no liability for any
errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.

Benelux:

Postbus 8034, 1180 LA Amstelveen
The Netherlands
Tel: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic:

ul. Rude armady 1868, 733 01 Karvina-Hranice
Tel: [phone] FAX: [phone]
Toll Free: 0800-1-66342
e-mail: [e-mail]

France:

9, rue Denis Papin, 78190 Trappes
Tel: [phone] FAX: [phone]
Toll Free in France: 0800-4-06342
e-mail: [e-mail]

Germany/Austria:

Daimlerstrasse 26, D-75392
Deckenpfronn, Germany
Tel: [phone] FAX: [phone]
Toll Free in Germany: 0130 11 21 66
e-mail: [e-mail]

United Kingdom: ISO 9002 Certified

One Omega Drive
River Bend Technology Centre
Northbank, Irlam, Manchester
M44 5EX, United Kingdom
Tel: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

RETURN REQUESTS / INQUIRIES

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

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.

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.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 1998 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, 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.

Servicing Europe:

NOTE

The carrier will not honor damage claims unless all shipping material
is saved for inspection. After examining and removing contents,
save packing material and carton in event reshipment is necessary.

OM2-160
Signal Conditioner System

Unpacking Information

Remove the Packing List and verify that you have received all
equipment, including the following (quantities in parentheses):

OM2-160 System (1)

Operator’s Manual (1)
If you have any questions about the shipment, please call the
OMEGA Customer Service Department.

When you receive the shipment, inspect the container and
equipment for signs of damage. Note any evidence of rough
handling in transit. Immediately report any damage to the
shipping agent.

TABLE OF

CONTENTS

i

Specifications 8

8-7

Stability is defined after a 5 minute warm-up period and with
constant line, load and ambient temperature unless otherwise
specified.
Quiescent current for amplifiers only, the current drawn from the
bridge supply must be added to the +15 Vdc current drain for total
current draw.
Referred to pin J, this is a high impedance output and should not
be loaded greater than 50 micro-amps. Buffer this reference with
an op-amp for greatest accuracy.

(13)

(14)

(15)

8 Specifications

8-6

Specifications referred to the filter output (Pin N).
Using on board coarse and fine gain adjust trimpots.
Warm-up drift is specified as the input offset drift for the first 5
minutes after the application of power with G = 1000 V/V, Bridge
supply = 10V driving a 350 ohm bridge.
Measured at 25°C Ambient with unit fully warmed up.
Measured from -Input to +Input with respect to ground.
Specified with 1 kohm source impedance imbalance, 100<Gain <
1000 V/V.
Filter frequency set with DIP switches.
Small signal response, switch or resistor/capacitor selectable, see
Section 1.4.
This is the instrumentation amplifier basic gain bandwidth
product, the filtered output will provide for a constant cutoff
frequency regardless of gain.
The low pass filter cutoff frequency is adjustable to 10, 100 and
1000 Hz using the on board DIP switches and from 1 Hz to 10 kHz
using external resistors and capacitors.
Bridge supply must be operated with +Sense connected to the
Bridge Supply Pin and with -Sense connected to Common.
The bridge supply maximum output current is a function of input
to output voltage differential and temperature. See the graphs in
earlier chapters and Chapter 1 for more information.

(1)
(2)
(3)

(4)
(5)
(6)

(7)
(8)

(9)

(10)

(11)

(12)

NOTES

OM2-165

Strain Gage Bridge Signal Conditioner

Page

Chapter 1 Introduction

1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.2 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.3 Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.4 Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

1.4.1 Digital Scales with Remote Tare Adjustment . . . . . . . . . . . . .1-3

Chapter 2 Instrument Amplifier

Chapter 3 Active Filter

Chapter 4 Filter Cutoff Frequency Adjustment

Chapter 5 Bridge Supply

Chapter 6 Half Bridge Completion/Bridge Balance

Chapter 7 General Calibration Procedures

Chapter 8 Specifications

ii

TABLE OF

CONTENTS

1-1

2-1

3-1

4-1

5-1

6-1

7-1

8-1

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OM2-160

Signal Conditioner System

TABLE OF

CONTENTS

iii

8-5

Specifications 8

8 Specifications

8-4

Min. Typical Max. Units

Output Noise, 10 Hz - 1 k Hz 200 µV p-p

Internal Reference Voltage (15) 6.46 6.80 7.14 Vdc

Half Bridge Completion

Nominal Resistance Value 20 k ohms

Initial Accuracy 1 %

Temperature Tracking 5 ppm/°C

Balance Adjustment Range 5 %

Power Requirements

Voltage Rated Performance ±15 Vdc

Operating ±12 ±18 Vdc

Current (14) ±12 mA

Environmental

Ambient Operating -25 70 °C

Storage -40 100 °C

Dimensions See Figure 8-1

Weight 1.5 oz (42.5 g)