Omega PX811 Series Owner Manual

£Y=OMEGA
ENGINEERING, INC.
An OMEGA Technologies Company
One Omega Drive, Box 4047
Stamford, Connecticut 06907-0047
Call OMEGA Toll Free"
Sales: 1-800-82-66342 / 1-800-TC-OMEGA
PX811 SERIES
HIGH ACCURACY
WET ABSOLUTE PRESSURE
TRANSDUCERS
Customer Service: 1-800-622-2378 / 1-800-622-BEST OUTSIDE DIMENSIONS/ ELECT RICAL CONNECTIONS
Engineering Assistance: 1-800-872-9436 / 1-800-USA-WHEN
“In CT: (203) 359-1660 CABLE: OMEGA EASYLINK: 62968934
And International TELEX: 996404
GENERAL DESCRIPTION
The OMEGA® PX811 is a rugged solid-state transducer that
measures true absolute pressure of fluids and gases. For fast
response and high accuracy, the PX811 utilizes a four-arm strain
gage embedded in a silicon crystal. The transducer is free from
hysteresis with high output at low strain. A stainless steel 2886 IF
isolating diaphragm assures compatibility with a wide variety of
liquid media.
FEATURES
* High Accuracy 0.1% BFSL for Ranges < 900 PSIA
® Excellent Overpressure Rating
* Wide Compensated Range —5° to 175° (—20° to 80°C)
2.36 approx.
—7
1.57
FAX: (203) 359-7700 28 5,
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Electrical connection
6 Core shielded/vented cable
Red Supply positive
White Supply negative
Yellow Output positive
Blue Output negative
Shield N/C to transducer body
Any other cores not connected.
SPECIFICATIONS
MODEL RANGE MODEL RANGE
PSIA PSIA
PX811-005GAV Oto5 PX811-150GAV O to 150
PX811-010AV Oto 10 PX811-200AV O to 200
PX811-015AV Oto 15 PX811-300AV 0 to 300
PX811-020AV Oto 20 PX811-500AV O to 500
PX811-030AV Oto 30 PX811-900AV O to 900
PX811-050AV O to 50
PX811-100AV 0 to 100
EXCITATION: 10 Vdc regulated at 5 mA, 12 Vdc max.
OUTPUT: 50 mV for 5 psi range; 100 mV for 10 psi range and above
OUTPUT IMPEDANCE: 2000 ohms nominal
LOAD IMPEDANCE: > 100 kilohms for rated performance
PERFORMANCE ACCURACY: Combined non-linearity, hysteresis, and repeatability .1% BS.L
ZERO BALANCE: +3 mV
SPAN SETTING: +10 mV standard; units of the same range are better than +3 mV from each other.
COMPENSATED TEMPERATURE RANGE: —5° to 175°F (- 20” to 80°C)
TEMPERATURE EFFECTS: +0.5% total error 32° to 122°F (0 to 50°C); +1.5% total error—5° to 175°F
(- 20° to 80°C)
OVERPRESSURE: The rated pressure can be exceeded by 4X (up to 2000 psi max.) causing negligible
calibration change.
BURST PRESSURE: 10x (3000 psi max.)
NATURAL FREQUENCY: 10.5 kHz for 5 psi range increasing to 210 kHz for 900 psi
MECHANICAL SHOCK: 1000g for 1 ms
ACCELERATION:
0.04% FSO/g for 5 psi decreasing to 0.0003% FSO/g for 900 psi
M1020/0589
SPECIFICATIONS (Cont'd)
VIBRATION: 0.5% FS/g @ 30g peak 10Hz-2KHz
CONSTRUCTION PRESSURE MEDIA: All media compatible with 316 stainless steel and Hastelloy C276
TRANSDUCTION PRINCIPLE: Integrated silicon gage bridge
PRESSURE PORT: 74-18 NPT
ELECTRICAL CONNECTIONS: 3 feet 4-wire shielded cable
WEIGHT: 4.2 oz. nominal
WARNING!
READ BEFORE INSTALLATION
eliminate the damaging hammer effects.
begun, as when a pump is turned on at full power or a valve is quickly opened.
and surges, a surge chamber should be installed, and a pressure snubber should be installed on every transducer.
Symptoms of fluid hammer and surge's damaging effects:
meter, 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.
Fluid hammer and surges can destroy any pressure transducer and must always be avoided. A pressure snubber should be installed to
Fluid hammer occurs when a liquid flow is suddenly stopped, as with quick closing solenoid valves. Surges occur when flow is suddenly
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
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
WARRANTY
OMEGA warrants this unit to be free of defects in materials and workmanship and to give satisfactory service for a period of 13 months from
date of purchase. OMEGA 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 our customers receive maximum coverage on each product. If the unit should malfunction, it must be
returned to the factory for evaluation. Our 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. However,
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 or which are damaged by misuse are not warranted. These include contact points, fuses, and triacs.
THESE UNITS ARE INHERENTLY DANGEROUS AND ARE INTENDED TO BE INSTALLED AND USED ONLY BY QUALIFIED
PERSONNEL. NO WARRANTY EXTENDED HEREIN WILL APPLY IF SUCH UNIT IS INSTALLED OR USED BY UNQUALIFIED
PERSONNEL. THERE ARE NO WARRANTIES EXCEPT AS STATED HEREIN. THERE ARE NO OTHER WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND OF FITNESS FOR A
PARTICULAR PURPOSE. OMEGA ENGINEERING, INC. IS NOT RESPONSIBLE FOR ANY DAMAGES OR LOSSES CAUSED TO OTHER
EQUIPMENT, WHETHER DIRECT, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL, WHICH THE PURCHASER MAY
EXPERIENCE AS A RESULT OF THE INSTALLATION OR USE OF THE PRODUCT. THE BUYER'S SOLE REMEDY FOR ANY BREACH
OF THIS AGREEMENT BY OMEGA ENGINEERING, INC. OR ANY BREACH OF ANY WARRANTY BY OMEGA ENGINEERING, INC. SHALL
NOT EXCEED THE PURCHASE PRICE PAID BY THE PURCHASER TO OMEGA ENGINEERING, INC. FOR THE UNIT OR UNITS OR
EQUIPMENT DIRECTLY AFFECTED BY SUCH BREACH.
EVERY PRECAUTION FOR ACCURACY HAS BEEN TAKEN IN THE PREPARATION OF THIS MANUAL, HOWEVER, OMEGA
ENGINEERING, INC. NEITHER ASSUMES RESPONSIBILITY FOR ANY OMISSIONS OR ERRORS THAT MAY APPEAR NOR ASSUMES
LIABILITY FOR ANY DAMAGES THAT RESULT FROM THE USE OF THE PRODUCTS IN ACCORDANCE WITH THE INFORMATION
CONTAINED IN THE MANUAL.
© Copyright 1989 OMEGA ENGINEERING, INC. All rights reserved including illustrations. Nothing in this manual may be
reproduced in any manner, either wholly or in part for any purpose whatsoever without written permission from
OMEGA ENGINEERING, INC.