Omega Products PX705 Installation Manual

ENGINEERING, INC.

®

PX703/705 Series

INSTRUCTION

SHEET

M3425/0699

M3425 8/99 DPS-5C-1P-10/99 Printed in U.S.A.

INSTALLATION INSTRUCTIONS FOR OMEGA

®

Mounting

The transducer requires no special
mounting hardware, and can be mount­ed in any plane with negligible position
error. Although the unit can withstand
normal vibration without damage or sig­nificant output effects, it is always good
practice to mount the transducer where
there is minimum vibration. For units
with NPT type pressure fittings apply
Te flon

®

tape or an equivalent sealant to
the threads before installing. When tight­ening, apply a wrench to the hex wrench
flats located just above the pressure fit­ting.

DO NOT tighten by using a pipe

wrench on the housing.

Power Supply

The supply voltage must be within the
range of 10 to 36 Vdc.

Noise

For minimum noise susceptibility avoid
running the transducer's cable in a con­duit that contains high current AC power
cables. Where possible avoid running the
cable near inductive equipment.

Temperature Limits

The storage temperature limits of the
transducer are –65 to 275°F. The unit

can

operate between –40 and 250°F.

WARNING!

This instrument is susceptible to damage
when exposed to static electrical charges.
To avoid damage to the transducer observe
the following:

• Ground the body of the transducer BEFORE
making any electrical connections

• When disconnecting, remove the ground
LAST.

NOTE: The braided shield and drain wire in
the cable (if supplied) is not connected to the
transducer body, and is not a suitable
ground.

CAUTION: Pressure spikes in excess of the
rated overpressure capability of the trans­ducer may cause irreversible electrical
and/or mechanical damage to the pressure
measuring and containing element(s).

WARNING: READ BEFORE INSTALLATION

Fluid hammer and surges can destroy
any pressure transducer and must always
be avoided. A pressure snubber should
be installed to eliminate the damaging
hammer effects. Fluid hammer occurs
when a liquid flow is suddenly stopped,
as with quick closing solenoid valves.
Surges occur when flow is suddenly
begun, as when a pump is turned on at

full power or a valve is quickly opened.

Liquid surges are particularly damaging
to pressure transducers if the pipe is
originally empty. To avoid damaging
surges, fluid lines should remain full (if
possible), pumps should be brought up
to power slowly, and valves opened
slowly. To avoid damage from both fluid
hammer and surges, a surge chamber
should be installed.

Symptoms of fluid hammer and surge’s
damaging effects:

a) Pressure transducer exhibits an output

at zero pressure (large zero offset). If
zero offset is less than 10% FS, user
can usually re-zero transducer, install
proper snubber and continue monitor­ing pressures.

b) Pressure transducer output remains

constant regardless of pressure.

c) In severe cases, there will be no output.

The installation shall be made in accor­dance with the code of the authority hav­ing jurisdiction or, in the absence of a
local code, in accordance with the current
edition of the Canadian Standard or

Natural Gas for Vehicles Installation Code
CAN/CGA-B149.4

or the American

Standard for

Compressed Natural Gas

(CNG) Vehicular Fuel Systems NFPA 52.

TRANSDUCER

METER

POWER
SUPPLY

WHITE (+ OUPUT)

RED (+ POWER)

BLACK (COMMON)

+

–

–

+

Dimensions

3-Wire Voltage Diagram

2-Wire Current Diagram

–

POWER
SUPPLY

–

METER

+

+

RED

BLACK

(+)

V+

(–)

V–

TRANSDUCER

#16 Gage Wires

12˝ Long

1/4 NPT

1.81

(46.02)

0.875
Wrench
Flats

0.25
(6.4)

Housing
Material
304 SS

2.2

(54.9)

Socket Material
17-4PH Stainless
Steel

(38.6)

0.62

(15.6)

1.52

Loop Supply Voltage vs.

Loop Resistance

for 4-20mA Output Only

1182

1000

750

500

250

Loop Resistance (Ohms)

0

0362010

Loop Supply Voltage (Vdc)

V

= 10V + [.022A*(RL)]

min

*includes a 10% safety factor

RL = RS + R

RL = Loop Resistance (ohms)

RS = Sense Resistance (ohms)

RW = Wire Resistance (ohms)

30

W

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.

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 should malfunction, 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 being 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, 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.

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. P. O. 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-W

ARRANTY

REPAIRS,

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

1. P. O. number to cover the COST of the repair,

2. Model and serial number of 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 1999 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 prior written consent of OMEGA ENGINEERING, INC.

MADE IN

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

®

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

®

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

®

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

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

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

[e-mail]

omega.com

OMEGAnet®On-Line Service Internet e-mail

www.omega.com [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LAAmstelveen, The Netherlands

Tel: [phone] FAX: [phone]
Toll Free in Benelux: 06 0993344
e-mail: [e-mail]

Czech Republic: Rudé armády 1868,73301 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: P.O. Box 7, Omega Drive,

ISO 9002 Certified Irlam, Manchester,

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

TM

®