Omega Products PX2300 Installation Manual

User’s Guide

http://www.omega.com

email: [e-mail]

MODEL PX2300

Differential Pressure Transmitters

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http://www.omega.com [e-mail]

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Laval (Quebec) H7L 5A1
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For immediate techincal or application assistance:

USA and Canada Sales Service: 1-800-826-6342/1-800-TC-OMEGASM
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Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

Servicing Europe:

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Czech Republic ul. Rude armady 1868, 733 01 Karvina-Hranice
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France: 9, rue Denis Papin, 78190 Trappes
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Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany
Tel: [phone] FAX: [phone]

United Kingdom: One Omega Drive, River Bend Technology Centre
ISO 9002 Certified Northbank, Irlam, Manchester

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.

Toll Free in Benelux: 0800 0993344
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Toll Free: 0800-1-66342 e-mail: [e-mail]

Toll Free in France: 0800-4-06342
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Toll Free in Germany: 0130 11 21 66
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M44 5EX, England
Tel: [phone] FAX: [phone]
Toll Free in the United Kingdom: 0800-488-488
e-mail: [e-mail]

SS2043 02/26/99 Rev.A

General Information
The PX2300 Series pressure transmitters have been carefully tested and calibrated

before shipment. Specific performance information is listed on the specification bulletin
for the transmitter. The PX2300 is designed to be used as a wet-to-wet differential
pressure transmitter with a 4 to 20 mA output and is contained in a NEMA 4 housing
enclosure.

Environmental Conditions
The PX2300 is designed to be operated and be stored under the following environmen-

tal conditions:

Temperature

Operating: 0 to 1750F (-18 to 800C)
Storage: -65 to 2500F (-54 to 1260C)

Media Compatibility

The media exposure to the wetted parts of the PX2300 Series pressure transmitter must
be compatible with 17-4 stainless steel, 300 series stainless steel, and Viton (Silicone).

Induced Environments

The PX2300 Series can withstand the following environments for vibration, shock and
acceleration. Keep in mind that the unit accuracy is affected during each of these
conditions and, although no permanent changes to performance will occur, means
should be taken to avoid these induced environments to the best extent possible to
provide the most accurate measurement:

Vibration: 2g from 5 to 500 Hz
Shock: 50g operating, 1/2 sine 10 ms
Acceleration: 10g maximum

Electrical Connections

Current Output Transmitters

The current output transmitters are true 2-wire (see Figure 1A), 4-20mA current devices
and deliver rated current into any external load of 0-800 ohms. The 4-20mA current
output units are designed to have current flow in one direction only – please observe
polarity.

We suggest that any electrical cable shield be connected
to the system’s loop circuit ground to improve electrical
noise rejection.
To access electrical connections remove cover on top of
the PX2300 Series transmitter (See Figure 1).

The PX2300 can operate over a voltage range of 9 to
30 VDC. It has been factory calibrated at 24VDC into a
250 ohm load. The minimum and maximum power
supply must be capable of delivering these voltages to
the PX2300. Thus, the minimum and maximum power
supply calculation is shown below and is depicted in
Figure 2.

MIN Supply Voltage: 9 + 0.02 x (resistance of receiver plus line)
MAX Supply Voltage: 30 + .004 x (resistance of receiver plus line)

The PX2300 Series comes with a 7/8” diameter port intended for a 1/2” I.D. conduit
connection. Contact factory for suggested fittings.

Figure 1

Figure 1A

PX 2300

Transmitter

(4 to 20 mA)

+

_

Figure 2

+

Power

Supply

_

Loop Power Supply

vs.

Loop Resistance for 4 to 20mA Transmitters

800

Operating

Range

Loop Resistance (Ohms)

0
9

Loop Supply Voltage (Vdc)

+

_

Load

(Monitor)

30

Mounting and Pressure Fittings
Mounting - The PX2300 Series is supplied with a mounting bracket and two (2) 6-32 x

3/8 hex head screws. First attach bracket to mounting location using holes or band
clamp notches available on large section of the bracket. Next, attach the transmitter to
bracket by using the two 6-32 x 3/8” hex head screws and the two tapped holes located
on the underside of the transmitter.

Pressure Fittings – Typically, standard pipe fittings and procedures should be used.
The PX2300 Series have 1/4”-18 NPT internal fittings. The high pressure port is
labeled with the word “High”.

Installation Precautions

For differential pressure measurements at high line pressure (250 psig max.) it is
recommended that the pressure sensor be installed with a valve in each line, plus a
shunt valve across the high and low (reference) pressure ports as shown in Figure 3.

Valve A

High

Figure 3

Valve C

Low

Valve B

Valve C should be open and valves A and
B closed whenever the system is first
being wetted or pressurized. Valves A
and B should be opened slowly to avoid
hammering. Valve C can then be closed
and the system will then be operating.

When the differential pressure sensor is
to be removed, Valve C must be opened
first, then Valves A and B can be closed.

Differential Pressure

Transducer

Valve A = High Side Valve
Valve B = Low Side Valve
Valve C = Shunt Valve

Figure 4

Bleed
Screws

Bleeding the Pressure Ports

3 bleed screws are on the side of the unit (see Figure 4) 2 for low pressure port, 1 for
high pressure port.

Install the transmitter in its intended location and pressurize the ports. Back off the first
bleed screw mounted on the flat side of the sensor body (2 turns max) until liquid begins
to flow out. After only bubble-free liquid flows out, retighten the bleed screw. Repeat
same procedure for the second set of bleed screws located on the round section of the
low pressure fitting.

Calibration

All PX2300 Series pressure transmitters are carefully calibrated to the specific input
pressure range vs. output current at the factory so little or no field calibrating is neces­sary. Zero and span adjustments are made by removing the cover on the top of the
PX2300 and the 6-32 seal screws in the plastic terminal block. Be sure to reinstall the
seal screws after zero and/or span adjustments. Current output transmitters (4-20mA)
are factory calibrated using a 250 ohm load at 24 VDC. Zero and span adjustments are
approximately +/-1.0 mA, individually.

The PX2300 Series are calibrated with the diaphragm in the vertical position (pressure
ports horizontal). For use in other orientations, position the unit and adjust the zero by
following the calibration procedure listed in the preceding section. Optimum results will
be achieved by using in the factory calibrated position. The PX2300 Series position
effect is as shown in Table 1 (pressure ports in vertical plane):

TABLE 1

Range High Pressure Port Face Up High Pressure Port Face Down

±0.5 psid -2% FS per g +2%FS per g
±1.0 psid -2% FS per g +2%FS per g

1.0 psig -2% FS per g +2%FS per g

2.0 psig -2% FS per g +2%FS per g
All other ranges -1% FS per g +1%FS per g

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 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 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 W ARRANTY 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’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 WHATSO EVER, 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.

RETURN REQUESTS/INQUIRES

Direct all warranty and repair requests/inquires 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 SER VICE DEPARTMENT (IN ORDER T O 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. Purchase Order 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.

OMEGA’s policy is to make running changes, not model changes. 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 the prior
written consent of OMEGA ENGINEERING, INC.

FOR NON-WARRANTY REPAIRS, consult
OMEGA for current repair charges. Have the
following information available BEFORE
contacting OMEGA:

1. Purchase Order number to cover the COST
of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific
problems relative to the product.

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA...Of Course!

TEMPERATURE

● Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies

● Wire: Thermocouple, RTD & Thermistor

● Calibrators & Ice Point References

● Recorders, Controllers & Process Monitors

● Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

● Transducers & Strain Gauges

● Load Cells & Pressure Gauges

● Displacement Transducers

● Instrumentation & Accessories

FLOW/LEVEL

● Rotameters, Gas Mass Flowmeters & Flow Computers

● Air Velocity Indicators

● Turbine/Paddlewheel Systems

● Totalizers & Batch Controllers

pH/CONDUCTIVITY

● pH Electrodes, Testers & Accessories

● Benchtop/Laboratory Meters

● Controllers, Calibrators, Simulators & Pumps

● Industrial pH & Conductivity Equipment

DA TA ACQUISITION

● Data Acquisition & Engineering Software

● Communications-Based Acquisition Systems

● Plug-in Cards for Apple, IBM & Compatibles

● Datalogging Systems

● Recorders, Printers & Plotters

HEATERS

● Heating Cable

● Cartridge & Strip Heaters

● Immersion & Band Heaters

● Flexible Heaters

● Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

● Metering & Control Instrumentation

● Refractometers

● Pumps & Tubing

● Air, Soil & Water Monitors

● Industrial W ater & Wastewater Treatment

M-3244/0399