Omega Products PX791 Installation Manual

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TM

®

User’s Guide

PX791 & PX792 Series

Sanitary Pressure Transducer

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]

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

www.omega.com [e-mail]

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

®

PX791 & PX792 SERIES

OMEGA® SANITARY PRESSURE TRANSDUCER

INSTRUCTION SHEET

Mounting

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. Be
sure to use a gasket that does not interfere with
the sanitary diaphragm. If the gasket I.D. is
smaller than 1.50 inches, an offset due to
clamping force will occur.

Power Supply

The supply voltage for the 1-5 and
1-6 Vdc output transducers must be within the
range of 10 to 36 Vdc. The maximum supply
voltage for a 4-20mA current output transducer
is 36 Vdc while the minimum supply voltage is
dependent upon the loop resistance of the circuit.
Refer to Figure 1. The loop supply voltage vs.
loop resistance shows the minimum supply
voltage (V

min

) required for a given loop resistance

(R

LOOP

).

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).

Excitation (Ratiometric Output Only)

For proper operation a voltage within the range
of 5 to 10 Vdc must be applied between the
transducer’s supply terminals.

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.

Shield Wiring

Connect the braided shield to the guard terminal
on the reading instrument (meter, etc.) if avail­able or to ground or to the power supply nega­tive terminal.

Adjustment Potentiometers

The zero and span pots are accessible through
the top of the case. Loosen the four screws and
separate the top carefully. The zero pot is marked
with a white dot.