Omega Products PRTXD-12-SL Installation Manual

PRTXD Series RTD Temperature Transmitters

INSTRUCTION

SHEET

M-4115/0507

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MADE IN

PRTXD Series RTD Transmitters

MODEL

PROBE

LENGTH

PROBE

TYPE

PRTXD-*-4 4" Fixed
PRTXD-*-4-SL 4"

Spring-Loaded

†

PRTXD-*-12 12" Fixed
PRTXD-*-12-SL 12"

Spring-Loaded

†

* Insert temperature code

CODE RANGE

100C 0 to 100°C
150C 0 to 150°C
100F 0 to 100°F
200F 0 to 200°F
300F 0 to 300°F

Accuracy

Display: ±0.1% of span, plus sensor error, ±1 digit
Analog output: ±0.1% of span, plus sensor error
Sensor: ±0.3°C at 0°C, ±1.1°C at 150°C

Sensor

100 Ω RTD element, 0.00385 alpha coefficient
IEC-751 Class B: ±0.3°C at 0°C, ±1.1°C at 150°C
10 second time constant

Display (update rate, type, size)

3 readings per second nominal display update rate
3 digit LCD,

1

/2" digit height

Controls

Non-interactive zero and span, ±10% range
Test calibration level; 0-100% range

Loop Supply Voltage

Any DC supply/loop resistance that maintains 8 to 32
VDC at gauge terminals. Minimum 8 V required at
gauge terminals at all times for proper operation.
Reverse polarity protected

Loop Output Characteristics

4-20 mA output
See chart below right for loop voltage characteristics

Test Function

Front panel TEST button when held, sets loop current
and display to test calibration level, independent of
temperature input, to allow testing of system operation.

Wiring Connections (see drawing)

3 ft long, 2-conductor 22 AWG cable

Weight

Transmitter: Approx. 12 ounces
Shipping weight: Approx. 1 pound

Material and Color

NEMA 4X ABS/Polycarbonate housing, light gray
Gasketed rear cover

Connection and Probe Material

1

/2" NPT male hex nipple, 316 stainless steel

316 stainless steel probe sheath

Storage Temperature

–40 to 203°F (–40 to 95°C)

Operating Temperature

–4 to 185°F (–20 to 85°C) at housing

†

Thermowell required for spring-loaded versions

.75"

(+)RED

Remote Device

Omega Engineering Made in USA

3.5"

°F

Span

Zero

TEST

Test

3 ft long,
2-conductor
22 AWG
cable

Loop Power

Supply

24 VDC typical

(–)(+)

(–)

(+)

0.75"

2.0

"

0.25" dia.

Stem

length

“L”

1/2" NPT

316SS

hex nipple

Continuous

weld on

non-spring

loaded

models

1.37"

1.25"

Installation and Precautions

A thermowell is required with flowing material,
pressurized applications, and all applications using
spring-loaded versions of the

PRTXD

.

Install or remove using wrench on probe hex fitting only.
Do not attempt to tighten by turning housing or any
other part of the transmitter. Due to the hardness of 316
stainless steel, it is recommended that a thread sealant
be used to ensure leak-free operation.

Electrical Connections

The 2-wire connection allows the

PRTXD

to be used as
a temperature display powered by a low-voltage DC
source, or as a loop-powered 4-20 mA transmitter.
Connect the loop (+) supply to the RED lead and the
loop (–) supply to the BLACK lead. Reversing the
connections will not harm the transmitter but it will not
operate with incorrect polarity.

Select a loop power supply voltage and total loop
resistance so that when the loop current is 20 mA, the
transmitter will have at least 8 VDC at its terminals. For
correct operation and to avoid erratic or erroneous
readings, the terminal voltage must not fall below 8
VDC. Too large a loop resistance will cause the output to
“limit” or saturate before reaching its full 20 mA output.

The minimum loop supply voltage may be calculated
from the formula:

V

min

= 8V + (20mA x Total loop resistance)

If the terminal voltage falls below about 7.8 VDC erratic
operation may occur. This is an indication that the loop
supply/resistance may not allow adequate power for
reliable operation. This should never occur in normal
use. If it does, examine the loop supply and resistance.

Operation

The

PRTXD

series is designed for continuous operation.
Warm-up time is negligible. The display will show the
temperature, and the loop current will be proportional to
the indicated temperature.

4 mA = Zero or low end

20 mA = Span, full-scale or high end

1400

1200

1000

800

600

400

200

0

Max Loop Resistance (Ohms)

8 121620242832

Loop Supply Voltage (DC)

Voltage Compliance for

4-20 mA Current Loop

3.0"
(–)BLACK

TEST Button

When the front-panel TEST button is held depressed,
the display and loop current are switched, independent
of the temperature, to a test level determined by the
setting of the Test adjustment.

Remove the nylon screw to access the Test
potentiometer. To set the test output level, press and
hold the front-panel TEST button and adjust the Test
level to set the display and loop current. When the
button is released, normal operation is resumed.

Calibration

The

PRTXD

is factory calibrated and there is generally
no need to alter calibration settings. Zero and span
calibration should only be attempted if the user has
access to temperature calibration equipment that has at
least four times the transmitter accuracy.

Remove nylon cover screws to access the front
calibration potentiometers. These potentiometers
calibrate the display. Zero calibration must be done
before span calibration. Record readings at three to five
points over the transmitter range and adjust span control
to minimize error and meet specifications.

Internal zero and span controls adjust the agreement
between the displayed value and the 4-20 mA loop
current. These are set at the factory and should not
normally be adjusted. If adjustment is necessary,
accurate current measurement equipment are required
to successfully complete this calibration.

Spring-loaded

probes

0.25" nom.

compression

(0.50" max.)

Typical

thermowell

PRTXD

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, human 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 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
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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.

Servicing North America:

USA: One Omega Drive, Box 4047

ISO 9001 Certified Stamford CT 06907-0047

Tel: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
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

®

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

FAX: [phone] [e-mail]

OMEGAnet®Online Service Internet e-mail

www.omega.com [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]

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Tel: [phone] FAX: [phone]
Toll Free: 0800-1-66342 e-mail: [e-mail]

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M44 5BD United Kingdom
Tel: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

M-4115/0507

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.
PATENT NOTICE: U. S. Pat. No. 6,074,089; 5,465,838 / Canada 2,228,333; 2,116,055 / UK GB 2,321,712 / Holland 1008153 / Israel 123052 / France

2 762 908 / EPO 0614194. Other patents pending.

FOR W

ARRANTY 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.

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.

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 2004 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.