Omega PX2700 User guide

PX2700 SERIES

M-5262/0213

OMEGAnet Online Service

®

omega.com

Internet e-mail

[email protected]

Servicing North America:

U.S.A: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047

ISO 9001 Certied Stamford, CT 06907-0047 USA
Toll Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] email: [email protected]

Canada: 976 Bergar
Laval (Quebec), Canada H7L 5A1
Toll Free: 1-800-826-6342 [phone]
FAX: [phone] email: [email protected]

For immediate technical or application assistance:

U.S.A and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA®

Customer Service: 1-800-622-2378/1-800-622-BEST®
Engineering Service: 1-800-872-9436/1-800-USA-WHEN®

Mexico: En Español: 001 [phone] FAX: [phone]
[email protected] e-mail: [email protected]

Servicing Europe:

Benelux: Managed by the United Kingdom Ofce

Toll-Free: 0800 099 3344 TEL: [phone]
FAX: [phone] e-mail: [email protected]

France: Managed by the United Kingdom Ofce

Toll-Free: 0800 466 342 TEL: [phone]
FAX: [phone] e-mail: [email protected]

Germany/Austria: Daimlerstrasse 26
D-75392 Deckenpfronn, Germany
Toll-Free: 0 800 6397678 TEL: [phone]
FAX: [phone] e-mail: [email protected]

United Kingdom: OMEGA Engineering Ltd.
ISO 9001 Certied One Omega Drive, River Bend Technology Centre, Northbank

Irlam, Manchester M44 5BD England
Toll-Free: 0800-488-488 TEL: [phone]

FAX: [phone] e-mail: [email protected]

It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is
constantly pursuing certication of its products to the European New Approach Directives. OMEGA will add the CE mark to every
appropriate device upon certication.
e 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 specications without notice.
WARNING: ese products are not designed for use in, and should not be used for, human applications.

Operating Instructions

PX2700

General Information

Your Omega transducer has been carefully calibrated before shipment to you, and it should be han­dled with t he same care given any precision instrument. Pressure range and dimensions are report-

ed on the specications bulletin for the transducer.

Ambient Conditions

Do not use in ambient conditions corrosive to anodize aluminum, or submerge in liquids, subject to
spray or vibration environment.

Electrical Conditions

Standard

“Belden” Cable Lead Option

Function

Positive Excitation Red White

Positive Output Green Yellow

(#8723 Grey Cable) “Tensolite” Cable Lead

Negative Output White Brown

Negative Excitation Black Black

Case Shield Shield

Electrical

The electrical circuit is equivalent to a 4-terminal network which can be grounded at only one point,
either at the negative excitation or the negative signal output lead, but must not be commoned or
grounded at more than one point.

The pressure transducer must be operated with the case connected either to the negative excitation
terminal or to the negative output terminal. Failure to do this may result in damage to, or unsatisfac­tory operation of the unit. This connected may be made by connecting shield and black (negative
excitation) leads or alternatively by connecting the shield and negative output signal leads together.
Best shielding against noise will be obtained by connecting the shield and negative excitation leads.
Circuit is reversed voltage protected for at least 5 minutes. Internal transient suppression network is
provided for short duration transients to 150 volts.

In some instances, use of long cables (several hundred feet long), may introduce enough cable
capacitance into the output circuit to cause output oscillation. If encountered, this oscillation may be
eliminated by connecting a 100 ohm resistor (1/8 watt or larger) in series in each of the output leads
at the end of the 2 foot transducer cable. These series resistors of course add to the output resis­tance.

Adjustments (with cover removed)

CAUTIONS:

1. Before making any adjustments, determine which circuit board diagram on Page 2
matches the circuit board in your transducer.

2. Turn off excitation power during cover removal or replacement.

3. Touching any adjustments other than zero of span may necessitate recalibration and
voids the warranty.

ZERO OUTPUT:

Output can be adjusted to zero by potentiometer as shown in diagram. Unit factory adjusted to 0.00
VDC output (±5mV).

SPAN:

Can be adjusted bu potentiometer as shown in diagram. Unit factory adjusted to 5.00 VDC full scale
output (±5mV).

LINEARITY - DO NOT TOUCH
Factory adjusted for best linearity.

NOTE: When circuit cover is removed, a zero shift can be noticed. The zero will return by the same
amount when the cover is replaced. This displacement of the output should be taken into account
when making adjustments or during recalibration.

*Adjustments: Due to the high accuracy of this transducer, adjustments to zero and span should
only be made with the use of primary pressure standards of known accuracy higher than that of the
PX2700.

INSTALLATION INSTRUCTIONS FOR MULTIPLE HOOK-UP

OF 4-WIRE OMEGA PRESSURE TRANSDUCERS

OPTION #1

Uses a single, ground referenced power supply for excitation and separate, isolated (not ground refer­enced) readout or “differential input) to a data acquisition system for each pressure transducer output.

OPTION #2

Uses a separate, isolated power supply for each pressure transducer’s excitation and a single ground

referenced readout or “single ended input” to a data acquisition system for all outputs.

Power Supply (Nominal 24 VDC)

PT - Pressure Transducer (4 Wire Circuit)

DVM/DAS - Digital Volt Meter or Data Acquisition System

OPTION #3

Uses a single, ground referenced power supply for excitation and either a single, isolated readout with
a bipolar switch that “breaks before makes” both the + output and - output of each pressure transduc­er, or a single data acquisition system with a multiplexer (MUX).

NOTE: The shield is internally commoned to the case and pressure port of the transducer. When the
shield is connected to ground the case and pressure port of the transducer will also be commoned to
that ground.

RETURNING PRODUCTS FOR REPAIR

Please contact Omega at 1-800-826-6342 or 1-203-359-1660 before returning unit for repair to review

information relative to your application. Many times, only minor eld adjustments may be necessary.

When returning a product to Omega, the material should be carefully packaged and shipped prepaid
to:

Omega Engineering, Inc

One Omega Drive

P.O. Box 4047

Stamford, CT 06907-0047

To assure prompt handling, please supply the following information and include it inside the package
of returned material:

1. Name and phone number of person to contact.

2. Shipping and billing instruction.

3. Full description of the malfunction.

4. Identify any hazardous material used with product.

Notes: Please remove any pressure ttings and plumbing that you have installed and enclose any re­quired mating electrical connectors and wiring diagrams. Allow approximately 3 weeks after receipt at
Omega for the repair and return of the unit. Non-warranty repairs will not be made without customer
approval and a purchase order to cover the repair charges.

Calibration Services

Omega maintains a complete calibration facility that is traceable to the National Institute of Standards
& Technology (NIST). If you would like to recalibrate or re-certify your Omega pressure transducers or
transmitters, please call our Sales Department at 1-800-826-6342 or 1-203-359-1660 for scheduling,
cost and turnaround estimates.

Thank you,
Omega Engineering, Inc.

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 interfac-

ing, operation outside of design limits, improper repair, or unauthorized modication. 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 cor-

rosion; or current, heat, moisture or vibration; improper specication; 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 specied 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, indemnication, 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. BEFORE RETURNING
ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OME-

GA’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 specic 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 2009 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.

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 specic problems

relative to the product.

TEMPERATURE

Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies
Wire: Thermocouple, RTD & Thermistor
Calibrators & Ice Point References
Recorders, Controllers & Process Monitors

Infrared Pyrometers

PRESSURE, STAIN AND FORCE

Transducers & Strain Gages
Load Cells & Pressure Gages
Displacement Transducers

Instrumentation & Accessories

FLOW/LEVEL

Rotameters, Gas Mass Flowmeters & Flow Computers
Air Velocity Indicators
Turbine/Paddlewheel Systems

Totalizers & Batch Controllers

pH/CONDUCTIVITY

pH Electrodes, Testers & Accessories
Benchtop/Laboratory Meters
Controllers, Calibrators, Simulators & Pumps
Industrial pH & Conductivity Equipment

DATA ACQUISITION

Data Acquisition & Engineering Software
Communications-Based Acquisition Systems
Plug-in Cards for Apple, IBM & Compatibles
Datalogging Systems
Recorders, Printers & Plotters

HEATERS

Heating Cable
Cartridge & Strip Heaters
Immersion & Band Heaters
Flexible Heaters

Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

Metering & Control Instrumentation

Refractometers
Pumps & Tubing
Air, Soil & Water Monitors
Industrial Water & Wastewater Treatment
pH, Conductivity & Dissolved Oxygen Instruments