OMEGA PRCTL Manual

SPRTX SERIES

Industrial RTD Connector/Transmitter

INSTRUCTION

SHEET

General Description

The OMEGA®SPRTX Series is a high performance, low cost, Industrial RTD
(Resistive Temperature Device) Connector/Transmitter. The SPRTX features
a hermetically sealed micro miniature signal conditioner built into a RTD
Connector that converts the resistive change of any 100 ohm, α = 0.00385 RTD
sensor or probe across a dedicated temperature range to an industry standard
2-wire, 4-20mA analog output. This analog output can be sent hundreds of
feet away from the location of your sensor (probe) to an indicating device,
controller, PLC, computer, data logger or chart recorder. Your SPRTX
Connector/Transmitter has been factory calibrated to provide maximum
performance and requires no field adjustments..

Note: Patented

Unpacking

Remove the packing list and verify that you have received all your
equipment. If you have any questions about the shipment, please call
Customer Service at: 1-800-622-2378 or 203-359-1660.

On the web you can find us at:

omega.com e-mail: [e-mail]

When you receive the shipment, inspect the container and equipment for
any signs of damage. Note any evidence of rough handling in transit.
Immediately report any damage to the shipping agent.

NOTE: The carrier will not honor any damage claims unless all shipping
material is saved for inspection. After examining and removing contents,
save packing material and carton in the event reshipment is necessary.

The following items are supplied in the box with your SPRTX
Connector/Transmitter.

• This User's Manual, # M-3935 (1 ea.)

• Probe/Connector Locking Clips (2 ea.)

SPRTX Series RTD Connector/Transmitter Models Available

Model No. Description Range

SPRTX-S1 with Standard Size Connector -99 to 208ºC (-146 to 406ºF)
SPRTX-S2 with Standard Size Connector 2 to 569ºC (36 to 1056ºF)
SPRTX-M1 with Miniature Size Connector -99 to 208ºC (-146 to 406ºF)
SPRTX-M2 with Miniature Size Connector 2 to 569ºC (36 to 1056ºF)

Recommended Accessories

Power Supply, OMEGA

®

Part No.: PSU-93

Shielded 2-conductor cable (100 ft), OMEGA

®

Part No.: TX2-100

M3935/0311

Shop online at: omega.com e-mail: [e-mail]
For latest product manuals: omegamanual.info

SPRTX Series Industrial RTD Connector/Transmitter

2

Introduction/Safety

Your SPRTX RTD Connector/Transmitter has been designed for ease of use
and flexibility. It is important that you read this users manual completely
and follow all safety precautions before operating your unit.

Precautions

1. FOLLOW ALL SAFETY PRECAUTIONS AND OPERATING
INSTRUCTIONS OUTLINED IN THIS MANUAL.

2. INSURE PROBE/CONNECTOR SAFETY CLIPS ARE ALWAYS
INSTALLED DURING USE.

3. ADD ADDITIONAL SAFE GUARDS TO YOUR SYSTEM IN
CRITICAL APPLICATIONS WHERE DAMAGE OR INJURY MAY
RESULT FROM PROBE/CONNECTOR SEPARATION OR FAILURE.

4. NEVER EXPOSE THE CONNECTOR/MODULE BODY TO
AMBIENT TEMPERATURES ABOVE 85ºC (185ºF) OR BELOW -40°C
(-40°F). DAMAGE MAY RESULT.

5. DO NOT OPERATE IN FLAMMABLE OR EXPLOSIVE
ENVIRONMENTS.

6. DO NOT USE IN HUMAN MEDICAL OR NUCLEAR
APPLICATIONS.

7. NEVER OPERATE WITH A POWER SOURCE OTHER THAN WHAT
IS SPECIFIED IN THIS MANUAL.

8. REMOVE AND OR DISCONNECT POWER SOURCE BEFORE
ATTEMPTING INSTALLATION OR MAINTENANCE.

9. ALWAYS OPERATE YOUR UNIT WITH THE SHIELD WIRE
CONNECTED TO EARTH GROUND.

10. INSTALLATION AND WIRING SHOULD BE DONE BY TRAINED

PROFESSIONALS ONLY.

11. DO NOT OPEN OR DISASSEMBLE YOUR UNIT.

NOTE: There are no user serviceable parts inside your unit. Attempting to
open, repair or service your unit will void your warranty.

SPRTX Series Industrial RTD Connector/Transmitter

3

Theory of Operation

A 4-20 mA loop is a series loop in which a transmitter will vary the current
flow depending on the input to the transmitter. With the SPRTX the amount
of current allowed to flow in the loop will vary depending on the resistance
change, due to changes in the temperature being measured by the RTD
sensor (probe). Some advantages of a current output over a voltage output
is that the signal measured is less susceptible to electrical noise interference
and the loop can support more than one measuring instrument as long as
the maximum loop resistance is not exceeded.

A typical application utilizing a current loop will normally consist of a
power supply, the transmitter and a meter, recorder or controller to
measure the current flow. The loop resistance in the sum of the measuring
instruments and wire used. The maximum allowable loop resistance for the
SPRTX to function properly is found by using the following formula:

Rmax = (power supply voltage – 9 volts)/.02 amps

For applications that require a voltage output, the 4-20mA signal from the
SPRTX can be converted in the field by adding a 250 Ohm shunt resistor
that will convert the transmitters output to a 1-5 Vdc signal when wired
correctly. See “Transmitter Wiring Examples” in this manual.

MANUFACTURING AREA

SPRTX

CONNECTOR/TRANSMITTER

DC POWER SUPPLY

24V

500.1C

PROCESS METER OR CONTROLLER

1000 FT. MAX

+

+

–

–

PT-100
RTD PROBE

a=0.00385

CONTROL ROOM

Mounting Your SPRTX to Probes

The SPRTX Series of connector/transmitters are designed for quick
connection to RTD sensors and probes. The SPRTX will connect to all
industry RTD probes that feature “Omega Style” standard or miniature
RTD connectors such as Omega OTP-U-M standard size connector or MTP­U-M miniature size connector. See below for correct usage.

Probe Locking Clips

Probe locking clips are also provided to help secure your probe to the
SPRTX Connector/Transmitter.

Caution: All though your SPRTX Connector/Transmitter will work with
any RTD sensor or probe, It is recommended that you use only OMEGA

®

RTD probes with you SPRTX unit to insure proper installation and use of
the probe locking clips. Probe locking clips are provided to offer added
protection against the separation of your probe and connector/transmitter.
In critical applications were separation of the RTD probe from the
connector/transmitter during normal operation could cause damage or
harm, it is recommended that you install additional safety and locking
devices to prevent the units from separating and/or shut down your
process.

SPRTX Series Industrial RTD Connector/Transmitter

4

PATENTED

INSTALL LOCKING CLIPS
ON YOUR PROBE

LOCKING CLIPS INSTALLED

Protection from High Ambient Temperatures

Note: Your SPRTX Connector/Transmitter Assembly can be damaged if
exposed to ambient temperatures above 85ºC (185ºF). Some applications may
require that you shield the SPRTX unit from radiated heat as shown below.
You should always use a probe were the length allows for a safe distance of 76
mm (3") or more between the body of the SPRTX and your source of heat.

Transmitter Wiring Examples

4 to 20mA Output (2-wire)

Converting from 4 to 20mA Output to 1 to 5Vdc Output (3-wire)

SPRTX Series Industrial RTD Connector/Transmitter

5

MANUFACTURING AREA

SPRTX

CONNECTOR/TRANSMITTER

DC POWER SUPPLY

24V

500.1C

PROCESS METER OR CONTROLLER

1000 FT. MAX

+

+

–

–

PT-100
RTD PROBE

a=0.00385

CONTROL ROOM

SPRTX

BARE WIRE

RED WIRE

BLACK WIRE

MUST BE

CONNECTED

TO EARTH

GROUND

24 V

POWER SUPPLY

DC VOLTAGE INPUT METER

500.1C

+

+

–

–

SPRTX Series Industrial RTD Connector/Transmitter

Temperature to Analog Output Calculations

Models: SPRTX-S1, SPRTX-M1

Models: SPRTX-S2, SPRTX-M2

Calibration/Service

Your transmitter has been factory calibrated to meet or exceed the
specifications outlined in this manual. No field adjustments are needed or
possible on your unit. If your unit should become damaged or malfunction,
please contact Omega Customer Service at:

On the web you can find us at:

omega.com e-mail: [e-mail]

6

Temp deg. C Temp deg. F RTD Resistance Output mA

-99 -146 60.67 4.00

-50 -58 80.31 6.55
0 32 100.00 9.16

25 77 109.73 10.46
50 122 119.40 11.77

75 167 128.99 13.07
100 212 138.51 14.37
125 257 147.95 15.67
150 302 157.33 16.98
175 347 166.62 18.28
208 406 178.80 20.00

Temp deg. C Temp deg. F RTD Resistance Output mA

-18 0 92.95 3.54
2 36 100.78 4.00

25 77 109.73 4.65

50 122 119.40 5.35
100 212 138.51 6.77
150 302 157.33 8.18
200 392 175.86 9.59
250 482 194.10 11.00
300 572 212.05 12.41
400 752 247.09 15.23
500 932 280.98 18.10

SPRTX Series Industrial RTD Connector/Transmitter

Specifications

Temperature Input Range by model

SPRTX-S1, SPRTX-M1: -99 to 208ºC (-146 to 406ºF)
SPRTX-S2, SPRTX-M2: 2 to 569ºC (36 to 1056ºF)

Accuracy: ±0.5% of full scale @ 23ºC

Repeatability: ± 0.25ºC (.5ºF)

Output Stability/Temp Drift: ± 0.0022mA/ºC

Max Ambient Temperature: -40 to 85 ºC (-40 to 185ºF)

Output: 2-Wire, 4 – 20 mA

Power Supply: 9 to 24 Vdc @ 30mA max

Max Loop Resistance: Ohms = (V supply – 9 V)/.02 A

Sensor Input Type: PT-100 (ohms) α = 0.00385 (2 or 3-wire)

Open Sensor Wire Indication:

Leg One: Open Wire = 27 mA
Leg Two: Open Wire = 2.2 mA
Leg Three: Open Wire = 2.2 mA

Connector Style/Material

Standard Size: Omega Model OTP-U-F (Glass Filled Nylon)

Miniature Size: Omega Model MTP-U-F (Glass Filled Nylon)

Dimensions

SPRTX-M1, SPRTX-M2: 79 x 18 x 24 mm (3.12 L x .70 W x .96" H)
SPRTX-S1, SPRTX-S2: 83 x 18 x 36 mm (3.25 L x .70 W x 1.43" H)

Weight

SPRTX-M1, SPRTX-M2: 106 g. (.24 lbs)
SPRTX-S1, SPRTX-S2: 110 g. (.25 lbs)

Response Time: 120ms (0-63% of full scale)

Note: The SPRTX Series is not designed for use in medical or nuclear
applications, nor flammable or explosive environments.

Note: Patented.

7

It is the policy of OMEGA Engineering, Inc. 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 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 in which wear is not warranted,
include but are 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 the
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY
KIND WHATSOEVER, EXPRESSED 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 / 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.

FOR WARRANTY

RETURNS, please have the following informa-

tion 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 2011 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.

Servicing North America:

U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047

ISO 9001 Certified

Stamford, CT 06907-0047
Toll-Free: 1-800-826-6342 Tel: [phone]
FAX: [phone] e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec), H7L 5A1 Canada
Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

For immediate technical or application assistance:

U.S.A. and Sales Service: 1-800-826-6342/1-800-TC-OMEGA

®

Canada: Customer Service: 1-800-622-2378/1-800-622-BEST

®

Engineering Service: 1-800-872-9436/1-800-USA-WHEN

®

Mexico/ En Español: 001 [phone] FAX: [phone]
Latin Ameica [e-mail] e-mail:[e-mail]

OMEGAnet®Online Service Internet e-mail

omega.com [e-mail]

Servicing Europe:

Benelux: Managed by the United Kingdom Office

Toll-Free: 0800 099 3344 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Czech Frystatska 184
Republic: 733 01 Karviná, Czech Republic

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

United OMEGA Engineering Ltd.
Kingdom: One Omega Drive, River Bend Technology Centre, Northbank

ISO 9001

Irlam, Manchester M44 5BD United Kingdom

Certified

Toll-Free: 0800-488-488 TEL: [phone]
FAX: [phone] e-mail: [e-mail]