Omega Products MTC-24-SHL-A Installation Manual

MTC SERIES

Multi-Pin Thermocouple Connectors

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WARNING: These products are not designed for use in, and should not be used for, human applications.

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i

Table of Contents

Page

Section 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Section 2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Section 3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3.1 Multi-Pin Connector Bodies . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3.2 Thermocouple Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.3 Backshell Clamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.4 Installing the Thermocouple Contacts . . . . . . . . . . . . . . . . . . 8

3.4.1 Contact Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.4.2 Contact Insertion into the Connector . . . . . . . . . . . . . . . . . . 10

3.4.3 Contact Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1

SECTION 1 INTRODUCTION

1.1 General Description

The OMEGA®Multi-Pin Thermocouple Connectors provide a sturdy
and efficient means of joining multi-wire thermocouple cables. They
can be used with OMEGA Multipair Extension Cable for rapid,
convenient connection and dismantling of apparatus without handling
individual sensors.

The design utilizes a combination of resilient and rigid dielectric
insulators to eliminate internal air voids and prevent the passage of air
and moisture into or through the connector. Connectors can withstand
ambient temperatures up to 392°F (200°C) contributing to an extended
connector life.

The OMEGA Multi-Pin Thermocouple Connectors do not carry a MIL
spec. number; however, they do meet the performance requirements of
MIL-C 26500E and are intermateable with MIL-C 26500 connectors.

1.2 Features

• Thermocouple alloy pins and sockets

• Air and moisture resistant connection

• Rated to 392°F (200°C)

• Removable crimp contacts

• Accepts 20-24 gage wire

• Aluminum shells

• Black anodized finish

• Threaded coupling

2

SECTION 2 UNPACKING

Remove the Packing List and verify that all equipment has been
received. If there are any questions about the shipment, please call
OMEGA Customer Service Department.

Upon receipt of shipment, inspect the container and equipment for any
signs of damage. Take particular note of any evidence of rough handling
in transit. Immediately report any damage to the shipping agent.

NOTE:

The carrier will not honor any claims unless all ship ing
material is saved far their examination. After examining
and removing contents, save packing material and carton in
the event reshipment is necessary

SECTION 3 OPERATION

3.1 Multi-Pin Connector Bodies

The contact cavities in the connectors are identified with a spiral guide
line indicating cavity sequence (see Figure 3-1). The first and last
cavities are numbered and every tenth cavity is bracketed. The number
of available cavities are 5, 12, 24, 41, and 55.

3

Figure 3-1. Cavity Sequence

4

The multi-pin connector bodies come in three styles (plus backshell
cable clamps), MC-male cord, FC-female cord, and FF-female flanged.

A. MC-Male Cord (see Figure 3-2)

In-line cord connectors with threaded couplings. MC style uses
thermocouple alloy pins.

B. Style FC-Female Cord (see Figure 3-3)

In-line cord connectors with threaded couplings. FC style uses
thermocouple alloy sockets.

C. Style FF-Female Flanged (see Figure 3-4)

Rugged flanged body for bulkhead and chassis mounting. It is a
flange mounted receptacle with threaded coupling. FF style uses
thermocouple alloy sockets.

D. Backshell Cable Clamp

Backshell cable clamps provide effective support for the cable at
the male or female connector and prevent twisting and pulling.

3.2 Thermocouple Contacts

The thermocouple contacts must be installed into the multi-pin
connector bodies by the user. Styles FC and FF use the thermocouple
alloy sockets; Style MC uses the thermocouple alloy pins. Pins and
sockets must be matched to thermocouple alloys.

The push-in crimp style contacts are machined from thermocouple
alloy materials and color coded for easy identification. Gold plated
copper (uncompensated) pins and sockets are available for use with
nonthermocouple wire. Sealing plugs are also available to seal unused
positions in lieu of a pin or socket.

5

“M” “S” “T” “V”

Number Backshell Coupling Shell Shell

Connector Shell of Clamp Nut Skirt Internal

Body Size Cavities Thread Dia. Dia. Dia.

MTC-5-MC 10 5

9

⁄16-24 UNEF 0.906 0.526 0.444

MTC-12-MC 12 12

3

⁄4-20 UNEF 1.078 0.696 0.614

MTC-24-MC 16 24

15

⁄16-20 UNEF 1.266 0.892 0.810

MTC-41-MC 20 41 13⁄16-18 UNEF 1.510 1.123 1.041

MTC-55-MC 22 55 1

5

⁄16-18 UNEF 1.625 1.248 1.166

Figure 3-2. MC Style Connector

6

“M” “R” “S” “T” “Y” “Z”

Number Backshell Coupling Flange Locknut Mounting Mounting

Connector Shell of Clamp Thread Width Flats Hole Hole

Body Size Cavities Thread Dia. Flat

MTC-5-FC 10 59⁄16-24 UNEF11⁄16-24 1.10415⁄16 0.076 0.730

MTC-12-FC 12 123⁄4-20 UNEF7⁄8-24 1.291 11⁄8 0.947 0.917

MTC-24-FC 16 2415⁄16-20 UNEF 11⁄16-18 1.516 15⁄16 1.135 1.105

MTC-41-FC 20 41 13⁄16-18 UNEF 15⁄16-18 1.860 19⁄16 1.385 1.350

MTC-55-FC 22 55 1

5

⁄16-18 UNEF 17⁄16-18 1.954 111⁄16 1.510 1.475

1-3/8 MAX.

1.285

.771

R THREAD M THREAD

1-1/8 MAX. PANEL THICKNESS

.081/.087 SIZES 8 TO 14
.122/.128 SIZES 16 TO 24

Figure 3-3. FC Style Connector

7

“M” “R” “S” “T” “Y” “Z”

Number Backshell Coupling FlangeMounting Back Front

Connector Shell of Clamp Thread Width Hole Mounting Mounting

Body Size Cavities Thread Centers Hole Hole

MTC-5-FF 10 59⁄16-24 UNEF11⁄16-24 .937 0.719 0.748 0.572

MTC-12-FF 12 123⁄4-20 UNEF7⁄8-24 1.031 0.812 0.913 0.760

MTC-24-FF 16 2415⁄16-20 UNEF 11⁄16-18 1.250 0.969 1.107 0.948

MTC-41-FF 20 41 13⁄16-18 UNEF 15⁄16-18 1.437 1.156 1.325 1.197

MTC-55-FF 22 55 1

5

⁄16-18 UNEF 17⁄16-18 1.562 1.250 1.452 1.322

.091/.097 SIZES 8 to 14
.122/.128 SIZES 16 TO 24

.125/.116 SIZES 8 to 22
.154/.145 SIZES 24 TO 28

(4) HOLES

1-3/8 MAX. S

S

T

T

1.155

R THREAD M THREAD

Figure 3-4. FF Style Connector

8

3.3 Backshell Clamps

(See Figure 3-9, Page 9).

3.4 Installing The Thermocouple Contacts

3.4.1 Contact Termination

Contacts are crimp terminated onto the wire outside the connector
assembly. A specially designed MS standard crimping tool (OMEGA

®

MTC-CT) must be used to properly crimp wires to the pins or sockets.

1. Strip the wire (20 to 24 gage) .170'' to .201''; avoid nicking the wires
or damaging the insulation as it is a functional part of the sealing
system.

2. Insert the stripped wire into the contact pocket until it is visible
through the inspection hole (see Figure 3-6).

3. Fully seat contact in crimp tool positioner.

4. Crimp in one full stroke. (Ratchet action ensures a complete crimp
every time.)

5. Inspect crimp for wire visibility through inspection hole.

9

Backshelf Max Max

Clamp Dia. B Length Dia. D Dia. E

MTC-5-SHL

3

⁄4 213⁄8

MTC-12-SHL 1 2 11⁄8

1

⁄2

MTC-24-SHL 11⁄8 21⁄2 11⁄2

5

⁄8

MTC-41-SHL 13⁄8 21⁄2 11⁄2

5

⁄8

MTC-55-SHL 11⁄2 31

5

⁄8

7

⁄8

MTC-5-SHL-A

3

⁄4 2

3

⁄4

1

⁄8

MTC-12-SHL-A 1 2

7

⁄8

3

⁄16

MTC-24-SHL-A 11⁄8 21⁄2 1

5

⁄16

MTC-41-SHL-A 13⁄8 21⁄2 11⁄8

7

⁄16

MTC-55-SHL-A 11⁄2 31

1

⁄8

1

⁄2

LENGTH

DIA. "B"

DIA. "E" DIA. "D"

M THREAD
PER FIGURE 3-2, 3-3, 3-4

SILICONE SEAL CLAMP CAP

BODYO-RING

Figure 3-5. Backshell Clamps

10

Figure 3-6. Inserting the Stripped Wire into the Contact

3.4.2 Contact Insertion into the Connector

Once the contacts are property crimped onto the wire, they are inserted
into the appropriate cavity of the connector by means of an insertion
tool (OMEGA’s MTC-IT). Assembly of the contacts into the connector
must be made with reasonable care to avoid damage to the insulation.

1. Lubricate the wire cavities in the back face of insert (on the
connectors) with a very thin film of silicone oil, or equal, before
inserting contacts.

2. Locate contact in insertion tool as shown in Figure 3-7.

3. Align contact with the hole in the rear face of the insert (see Figure
3-8). The alignment of the insertion tool with contact must be
coaxial with the axis of the connector. When the contact has
entered the rear seal portion of the insert, maintain alignment of
contact and tool parallel to and in line with the hole. Insert the
contact to full depth. User will hear contact click-in when seated
fully in retention collet.

4. Remove insertion tool, keeping it aligned with the hole.

11

Figure 3-7. Locating Contact into Insertion Tool

Figure 3-8. Aligning Contact

12

3.4.3 Contact Removal

A contact is removed from the connector insert with the extraction tool

(OMEGA’s MTC-RT).

1. Set the space sleeve in the proper position for removal of male or
female contact.

2. Place too[ over the contact and insert into the cavity (see Figure
3-9). The alignment of the removal tool with the contact must be
coaxial with the axis of the connector.

3. Exert pressure axially to release retention collet. Spacer sleeve
will shoulder at face of insulation when tool is inserted to proper
depth.

4. Push extraction plunger to force the contact out of the rear of the
insert.

5. Grasp contact or wire at the rear of the insert and pull to
complete extraction.

6. Remove tool axially.

7. After using extraction tool the space sleeve should be set forward
in last notch to protect the end of the plunger guide.

13

Figure 3-9. Alignment of Removal Tool

14

Notes

1 . MS standard assembly tools are required to properly crimp and

assemble connectors.

2. Match pins and sockets to thermocouple alloys.
Example: A 12 cavity connector carries 6 thermocouple circuits
(pairs) requiring 6 positive alloy pins or sockets, and 6 negative
alloy pins or sockets per connector.

3. Order connectors in mating pairs. Style MC mates with Style FF.
Style MC mates with Style FC.

4. Backshell cable clamps are recommended with each cord style
connector.

15

Notes

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.

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 2006 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.

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.

M0192/0306

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