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CEOMEGA”
PX240A Series
Pressure Transducers
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The OMEGASPX240APressure Transducer Series is
available in gage type to measure pressures ranging from
+/- 2.5 psi to 0-250 psi. The sensor is housed in a rugged
stainless steel body. Media compatibility for oils, fuels,
gasoline, petroleum-based lubricants, hydraulic fluids, alcohol,
water and air is provided by intemal Buna-N O-ring seals.
Termination is by 300mm (12 in.), colour coded 18 gage
lead wires.
FEATURES
* 8.0 Vdc Excitation
* 12 inch Leadwires
* -40 to +85%C
* 1 to 6 Vdc output
* Temperature compensated
* Rugged low profile, easy-to-mount
* Buna-N seals
be installed to eliminate the damaging hammer effects.
be installed on every transducer.
c) In severe cases, there will be no output.
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 meter, install proper snubber and continue monitoring pressures.
b) Pressure transducer output remains constant regardless of pressure.
WARNING! READ BEFORE INSTALLATION
Fluid hammer and surges can destroy any pressure transducer and must always be avoided. A pressure snubber should
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, and a pressure snubber should
MOUNTING: Screw-in (1/8-27 NPT port) or flat-pack
(M5 or #10 fasteners)
WIRING
Vs Red
Common Black
Output Green
WARNING: Damage
may result from reversal
of supply and common
connections.
MOUNTING DIMENSIONS
(for reference only)
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ге во Czech Republic: Rudé armády 1868, 733 01 Karviná 8
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| ema нота са E. Toll Free in Germany: 0800 639 7678
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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.
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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 receiye 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.
ARE RETURN REQUESTS / INQUIRIES :: UU
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 FOR NON-WARRANTY REPAIRS, consult OMEGA for
information available BEFORE contacting OMEGA: current repair charges. Have the following information
1. Purchase Order number under which the product was available BEFORE contacting OMEGA:
PURCHASED, : 1. Purchase Order number to cover the COST of the repair,
2. Model and serial number of the product under 2. Model and serial number of the product, and
warranty, and 3. Repair instructions and/or specific problems relative to
3. Repair instructions and/or specific problems relative to the product.
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 2000 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.
PX243A SPECIFICATIONS at 8.0 +0.01VDC Excitation. 25°C (unless otherwise specified)
Pressure Ranges (psi)
Parameter +2.5 +5.0 +15 Units
Sensitivity per psi, typ. 1.00 0.50 0.177 V
Overpressure, max. 20 15 50 psi
Linearity (Best Fit Straight Line)
P2 > P1, max. +1.50 +1.50 +1.50 %F.S.
P2 < P1, max. +0.75 +0.75 +0.75
Temperature Error. Combined Null
and Sensitivity Shift
25° to -18°, 25° to 63°C, max. +1.00 +1.00 +1.00 %F.S.0.
25° to -40°, 25° to 83°C, typ. +1.50 +1.50 +1.50
GAGE TYPE TRANSDUCERS TEMPERATURE ERROR
GAGE
Gage devices measure one pressure with
respect to another. In gage devices, P1 is
vented to atmospheric pressure and the
measurand is applied to P2.
bh — SENSOR CHIP
Temperature error is calculated with
respect to 25°C and expresses the
deviation that could occur as temperature
is raised or lowered to limits indicated.
Typical (as used herein): the error is within
a EE +1 standard deviation (+5) of the nominal
CHAMBER
specified value, as computed from the
total population.
Gage (+)
FS.0.
Gage (+)
P (GAGE)
Transducer Schematic
Vy SENS.
| COMP
NULL
COMP
PX240A General Specifications*
Parameter Min. Typ. Max. Units
Full Scale Output (F.5.0.)** (1) 4.85 5.00 5:15 V
(2) +2.5
Null Offset (1) 0.95 1.00 1.05 V
(2) 3.45 3.50 3.55
Output at Full Pressure (3) 5.80 6.00 6.20 V
Response Time 1 msec
Excitation 7.00 8.00 16.00 Vdc
Supply Current 8.00 20.00 mA
Output Current
Source 10.0 mA
Sink 5.0
Ratiometricity
7to8or8to9V +0.50 % F.S.O.
8to12V + 2.00
Stability over | year + 1.00 % F.S.O.
Shock
MIL-STD-202, Method 213B (100 G, half sine)
Vibration MIL-STD-202, Method 204C (10 to 2,000 Hz at 10 G)
Temperature
Compensated -18 to +63°C (0 to +145°F)
Operating -40 to +85°C (-40 to +185°F)
Storage -55 to + 125°C (-67 to +257°F)
Media Compatibility
Limited only to those non-caustic media which will not attack the Stainless Steel
housing; silicon chip; glass; or one of the several O-ring materials.
Weight 200 grams (702)
Termination 300 mm (12 in.) long #18 AWG leadwires
Output Ripple None, dc device
Short Circuit Protection Output may be shorted indefinitely to ground
Ground Reference Supply and Output are common
(1) Positive (or negative)
pressure measurement.
(2) Positive and negative
*General specification at 8.0 £0.01 Vdc **F.S.O. is the algebraic difference
Excitation, 25°C inless otherwise between end points (output at null
noted) and full pressure). The F.S.O. will
vary proportionately with supply pressure measurement.
voltage (sensor not internally (3) Out Hi я
put at positive (or negative)
regulated). pressure.
PX241A/PX242A SPECIFICATIONS at 8.0 + 0.01 VDC Excitation, 25°C (unless otherwise noted)
Pressure Ranges (psi)
Parameter 0.5 0-15 0-30 0-60 0-100 0-150 0-250 Unils
Sensitivity per psi, typ. 1.00 .330 167 .083 .050 .033 .020 V
Overpressure. max. 20 45 60 100 200 300 500 psi
Unearity. max. +1.5 +1.5 $11.5 +0.5 +0.5 +05 +0.5 %F.S.0.
Temperature Error, Combined
Null & Sensitivity Shift %F.S.0.
25° to -18°,25° to 63°C. max. +1.5 +1.0 +1.0 +1.5 +1.0 +1.5 +1.0
25° to -41° 25° to 85°C, typ. +3.0 +2.0 +2.0 +3.0 +2.0 +3.0 +2.0
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