Omega Products PX624 Installation Manual

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TM

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User’s Guide

PX624 Series

Transducers

Servicing North America:

USA: One Omega Drive, P.O. Box 4047

ISO 9001 Certified 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

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

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

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TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico: Tel: [phone] FAX: [phone]

En Espan˜ ol: [phone]-7803 e-mail: [e-mail]

[e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Rudé armády 1868, 733 01 Karviná

TEL: [phone] FAX: [phone]
Toll Free in Czech Rep.: 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: 0800 TC-OMEGA

SM

e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5EX, United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in the United Kingdom: 0800 488 488
e-mail: [e-mail]

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OMEGAnet®On-Line Service Internet e-mail

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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.

TM

®

PX624 OMEGA®PRECISION PRESSURE TRANSDUCER

INSTALLATION AND OPERATING INSTRUCTIONS

IMPORTANT

Please read the operating and installation instructions
thoroughly before using this instrument or attempting
any repair work. Installation and operation of this
instrument should be performed by a qualified instru­mentation engineer or technician only.

This instrument is not field repairable outside of rou­tine zero and span adjustment. Problems which cannot
be remedied by following the instructions in this man­ual should be referred to Omega Engineering

SAFETY PRECAUTIONS

Electronic pressure instruments must be selected in
accordance with industry codes and safety practices to
avoid the possibility of misuse or misapplication which
could result in personal injury or property damage.
Personnel responsible for selection and installation
should also be familiar with the safety recommenda­tions of ASME B40.1, that apply to elastic pressure ele­ments and their application in general and specific
services. ASME B40.1 is available from:

ASME
345 47th Street
New York, NY 10017

Pressure – Select a range so that the maximum applied
pressure will never exceed the upper range limit.

Vibration – Excessive vibration could cause loosening
of components resulting in loss of instrument accuracy
or failure to provide valid data.

Pulsation – Excessive pressure pulsation could result
in fatigue failure of the pressure element.

Temperature – Operation of the instrument in an envi­ronment where temperatures are in excess of design
ratings may result in loss of accuracy and failure.

Process – Pressure boundary materials must be resis­tant to the process media. Failure to assure compatibili­ty may result in pressure sensing element deterioration
or failure. Instruments used on high pressure gas, or
potentially hazardous service, such as oxygen should
be carefully selected in accordance with the recommen­dations of ASME B40. 1.

Hazardous Location – Only approved explosion proof
or intrinsically safe instruments should be used in haz­ardous locations.

Electro-Magnetic Interference – Instruments used in
locations where EMI/RFI conditions exist may exhibit
erroneous performance.

WARNING – THESE INSTRUMENTS ARE NOT
EXPLOSION PROOF OR INTRINSICALLY SAFE.
POWER LEVELS PRESENT PRECLUDE USE IN
HAZARDOUS LOCATIONS.

INSPECTION

Examine the instrument carefully for any visible signs
of damage that may have occurred during shipment.
In the absence of any damage proceed with installa­tion.

Theory of Operation

The PX624 pressure transducer uses an optical means
of detecting the effective pressure acting on an elastic
member (an Inconel diaphragm up to 250 psi and an
Inconel Bourdon tube above 250 psi), therefore, there is
no physical contact between the force summing ele­ment and the means by which the electrical output sig­nal is produced. This unique sensor design results in
extraordinary repeatability and accuracy.

The basic operation of the sensor is simple. The
diaphragm or Bourdon tube element moves only 0.020
of an inch during a full span pressure excursion. This
small motion combined with the use of high strength
materials result in minimum stress levels, well below
metal yield points, to assure stability, repeatability, and
long sensor life. Attached to the diaphragm or Bourdon
tube is an opaque vane, the movement of which is
sensed by an optical system comprised of an LED light
source adjacent to a monolithic dual diode package.
See figure 1 below.

Figure 1. Sensor Cutaway

BOURDON TUBEDIAPHRAGM

Ref.
Diode

Meas.
Diode

Measured Pressure

LED

Ref.
Diode

Meas.
Diode

LED

Measured Pressure