Thermo Scientific 61-12C Service manual

Model 61-12C (FM)
or 61-12 C/CSA
Speed Sensor
Operating and Service Manual
REC 3449 Rev M P/N 013984

Revision History
Revision Number Date ECO Number Release Specifics
A March 1995
B December 1995
C January 1990
D March 1991
E September 1991
F February 1993
G May 1999
H February 2001
J April 2001
K July 2006
L December 2007
M November 2008

©2007 Thermo Fisher Scientific. All rights reserved.
This document is confidential and is the property of Thermo Fisher Scientific (Thermo Scientific). It may not
be copied or reproduced in any way without the express written consent of Thermo Fisher Scientific. This doc-
ument also is an unpublished work of Thermo Fisher Scientific. Thermo Fisher Scientific intends to, and is
maintaining the work as confidential information. Thermo Fisher Scientific also may seek to protect this work
as an unpublished copyright. In the event of either inadvertent or deliberate publication, Thermo Fisher Scien-
tific intends to enforce its rights to this work under the copyright laws as a published work. Those having
access to this work may not copy, use, or disclose the information in this work unless expressly authorized by
Thermo Fisher Scientific.
"Microsoft" and "Windows" are either registered trademarks or trademarks of Microsoft Corporation in the
United States and/or other countries.
All other trademarks are the property of Thermo Fisher Scientific and its subsidiaries.
Occupational Safety and Health Act (OSHA)
The Occupational Safety and Health Act clearly places the burden of compliance on the user of the equipment
and the act is generalized to the extent that determination of compliance is a judgment decision on the part of
the local inspection. Hence, Thermo Fisher Scientific will not be responsible for meeting the full requirements
of OSHA in respect to the equipment supplied or for any penalty assessed for failure to meet the requirements,
in respect to the equipment supplied, of the Occupational Safety and Health Act, as interpreted by an autho-
rized inspector. Thermo Fisher Scientific will use their best efforts to remedy such violation at a reasonable
cost to the buyer.
Thermo Fisher Scientific Warranty
The seller agrees, represents, and warrants that the equipment delivered hereunder shall be free from defects in
material and workmanship. Such warranty shall not apply to accessories, parts, or material purchased by the
seller unless they are manufactured pursuant to seller's design, but shall apply to the workmanship incorporated
in the installation of such items in the complete equipment. To the extent purchased parts or accessories are
covered by the manufacturer's warranty, seller shall extend such warranty to buyer.
Seller's obligation under said warranty is conditioned upon the return of the defective equipment, transporta-
tion charges prepaid, to the seller's factory in Minneapolis, Minnesota, and the submission of reasonable proof
to seller prior to return of the equipment that the defect is due to a matter embraced within seller's warranty
hereunder. Any such defect in material and workmanship shall be presented to seller as soon as such alleged
errors or defects are discovered by purchaser and seller is given opportunity to investigate and correct alleged
errors or defects and in all cases, buyer must have notified seller thereof within one (1) year after delivery, or
one (1) year after installation if the installation was accomplished by the seller.
Said warranty shall not apply if the equipment shall not have been operated and maintained in accordance with
seller's written instructions applicable to such equipment, or if such equipment shall have been repaired or
altered or modified without seller's approval; provided, however, that the foregoing limitation of warranty inso-
far as it relates to repairs, alterations, or modifications, shall not be applicable to routine preventive and correc-
tive maintenance which normally occur in the operation of the equipment.

"EXCEPT FOR THOSE WARRANTIES SPECIFICALLY CONTAINED HEREIN, SELLER DISCLAIMS
ANY AND ALL WARRANTIES WITH RESPECT TO THE EQUIPMENT DELIVERED HEREUNDER,
INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR USE. THE
SOLE LIABILITY OF SELLER ARISING OUT OF THE WARRANTY CONTAINED HEREIN SHALL BE
EXCLUSIVELY LIMITED TO BREACH OF THOSE WARRANTIES. THE SOLE AND EXCLUSIVE
REMEDY FOR BREACH OF THE WARRANTIES SET OUT ABOVE SHALL BE LIMITED TO THE
REPAIR OR REPLACEMENT OF ANY DEFECTIVE ACCESSORY, PART OR MATERIAL WITH A SIM-
ILAR ITEM FREE FROM DEFECT, AND THE CORRECTION OF ANY DEFECT IN WORKMANSHIP.
IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAM-
AGES."
Purchaser agrees to underwrite the cost of any labor required for replacement; including time, travel, and living
expenses of a Thermo Fisher Scientific Field Service Engineer at the closest factory base.
Thermo Fisher Scientific
501 90th Ave NW
Minneapolis, MN 55433
Phone: [phone]
Fax: [phone]
Disclaimer
Though the information provided herein is believed to be accurate, be advised that the information contained
herein is not a guarantee for satisfactory results. Specifically, this information is neither a warranty nor guaran-
tee, expressed or implied, regarding performance, merchantability, fitness, or any other matter with respect to
the products, and recommendation for use of the product/process information in conflict with any patent.
Please note that Thermo Fisher Scientific reserves the right to change and/or improve the product design and
specifications without notice.

Contents
Thermo Fisher Scientific
Contents
Chapter 1 Introduction ................................................................ 1-1
Overview ...................................................................... 1-1
Application ................................................................... 1-2
Unpacking and Inspection ............................................ 1-2
Storage........................................................................ 1-2
Chapter 2 Installation .................................................................. 2-1
Overview ...................................................................... 2-1
Coupling Installation ..................................................... 2-1
Restraint Arm Installation ............................................. 2-3
Electrical wiring ............................................................ 2-7
Chapter 3 Operation .................................................................... 3-1
Overview ...................................................................... 3-1
Model 61-12C............................................................... 3-1
Chapter 4 Maintenance................................................................ 4-1
Overview ...................................................................... 4-1
Calibration .................................................................... 4-1
Chapter 5 Service, Repair, and Replacement Parts.................. 5-1
Parts Ordering Information ........................................... 5-2
Contact Information ...................................................... 5-5
Parts List ...................................................................... 5-8
Appendix A Engineering Drawings .............................................A-1
Appendix B Factory Mutual Report .............................................B-1

Contents
Thermo Fisher Scientific

Thermo Fisher Scientific REC 3349 Rev M
List of Figures
Figure 1-1. Model 61-12C Speed Sensor..................................................1 - 1
Figure 2-1. Method A Installation ............................................................2 - 2
Figure 2-2. Method B Installation ............................................................2 - 2
Figure 2-3. Mounting Illustration .............................................................2 - 4
Figure 2-4. Field Wiring Model 61-12 C Speed Sensor ...........................2 - 7
Figure 3-1. Method B Installation.............................................................3 - 1
Figure 3-2. 61-12C Output Voltage Waveform........................................3 - 2
Figure 5-1. Centering Template for Speed Sensor ..................................5 - 6

REC 3349 Rev M Thermo Fisher Scientific

Thermo Fisher Scientific iREC 3449 Rev M
About This Manual
This manual provides information you need to install, operate, and
maintain a Model 61-12 C (FM) or Model 61-12 C/CSA Speed Sensor.
Read this manual before working with the product. For personal and
system safety and for the best product performance, make sure you
thoroughly understand the contents before using this machine.
Who Should Use
this Guide?
This Model 61-12 C (FM) Speed Sensor manual is a learning resource
and reference for anyone concerned with installing, operating or
maintaining the speed sensor.
Organization of
this Guide
This Guide is organized into five chapters and two appendices.
Chapter 1: Introduction to the Model 61-12C (FM) Speed Sensor – gives you
an overview of the device’s capabilities, describes its functions, and
lists it technical specifications.
Chapter 2: Installing the Model 61-12 C (FM) Speed Sensor– provides
information about the installation of the speed sensor.
Chapter 3: Model 61-12C (FM) Speed Sensor Operations- provides
information about setting up, testing, and operating the speed sensor.
Chapter 4: Maintaing and Troubleshooting the 61-12 C (FM) Speed Sensor –
provides information about maintenance and troubleshooting. It
includes procedures for determining and correcting operational
problems.
Chapter 5: Service Repair and Replacement Parts - tells you how to contact
Thermo Fisher Scientific and how to order parts.
Appendix A: Engineering Drawings
Appendix B: Factory Mutual Report

About this Manual
ii REC 3449 Rev M Thermo Fisher Scientific
Documentation
Conventions
The following conventions are used in this manual to help easily identify
certain types of information.
Bold is used the first time a new term is introduced.
Italic is used to for emphasis and terms that have already been
introduced.
Blue is used for references to other sections of the guide and serve as
links in documents.
SMALL CAPS are used in the names of setup, calibration, menu displays,
and variables.
BOLD CAPITALS are used for the names of keys.
NOTE. Provides information of special importance to the reader. S
HINT. This symbol indicates a hint that may be of value but not
necessary for operation. S

About this Manual
Thermo Fisher Scientific iii REC 3449 Rev M
Safety Messages Instructions in this manual may require special precautions to ensure the
safety of the personnel performing the operations.
There are two levels of safety messages: warnings and cautions. The
distinction between the two is as follows:
General Precautions Do not install, operate, or perform any maintenance procedures until you
have read the safety precautions presented.
• Make sure only personnel trained by a Thermo Fisher Scientific
representative perform installation and maintenance
procedures in accordance with the instructions in this manual.
• Allow only qualified electricians trained by a Thermo Fisher
Scientific representative to open and work in the electronics
cabinet and terminal boxes.
• Covers over the electronics and moving parts must always
remain in place during normal operation. Remove only for
maintenance with the machines power OFF. Replace all covers
before resuming operation.
• During maintenance, a safety tag (not supplied by Thermo
Fisher Scientific) is to be displayed over the ON/OFF switch
area instructing others not to operate the unit (ANSI:B157.1)
CAUTION. Failure to observe could result in death or serious
injury. S
WARNING. Failure to observe could result in death or serious
injury. S
WARNING. Failure to follow safe installation and servicing
procedures could result in death or serious injury. S

About this Manual
iv REC 3449 Rev M Thermo Fisher Scientific
• The main isolator switch must be OFF when checking input AC
electrical connections, removing or inserting any electrical
item, or attaching voltmeters to the system.
• Allow a minimum of 5 minutes between turning the mains
isolator to the OFF position and opening the access panel of
the machine.
• Use extreme caution when testing in, on, or around the
electronics cabinet, high voltages in excess of 115 V or 230 V
are present in these areas.
Inspection Inspect the packages for external damage before opening. After
unpacking, inspect the unit for damage and compare parts to those and
the shipping invoice.
CAUTION. High voltage that may be present on leads could cause
electrical shock. S
WARNING. Do not make changes to this equipment of any kind
without prior consultation with Thermo Fisher Scientific. S

About this Manual
Thermo Fisher Scientific vREC 3449 Rev M

About this Manual
vi REC 3449 Rev M Thermo Fisher Scientific

Thermo Fisher Scientific REC 3449 Rev M 1-1
Chapter 1
Introduction
Overview The Model 61-12 C (FM) Speed Sensor is designed and constructed for
direct connection to a conveyor tail pulley, snubbing roll, or large
diameter return roller.
The speed sensor employs a brushless pulse generator producing a stream
of pulses, each pulse representing a unit of belt travel. Frequency of the
pulse stream is proportional to true belt speed.
The Model 61-12 C (FM) is Factory Mutual (FM) approved for Class I,
Division II, Groups D and Class II, Divisions I and II, Groups E, F, G.
Figure 1-1. Model 61-12C Speed Sensor

Introduction
Unpacking and Inspection
1-2 REC 3449 Rev M Thermo Fisher Scientific
Application The speed sensor is coupled to a rotating shaft which drives a generator
inside the housing. The Model 61-12 C Speed Sensor has a usable range
between 20 and 200 RPM. The frequency of the speed sensor output
signal is exactly proportional to shaft speed and provides the required
speed input to a Integrator/Totalizer.
Unpacking and
Inspection
The Model 61-12 C Speed Sensor has been properly packaged and
inspected prior to shipment. Before unpacking, be certain to check the
package for external damage, as the carrier may often times be held
responsible for shipping damage.
Storage The Model 61-12 C Speed Sensor can be safely stored indoors, with hole
plugs installed, between -50 and +70 degrees C (-58 to +158 degrees F).
The unit must be protected against moisture.

Thermo Fisher Scientific REC 3449 Rev M 2-1
Chapter 2
Installation
Overview The Model 61-12 C Speed Sensor must be attached to a pulley shaft
which turns at true conveyor belt speed. Normally, the tail pulley shaft or
a snubbing roll shaft satisfies this requirement. In installations where the
tail pulley or snubbing roll shaft is not accessible, an additional pulley
must be installed specifically for the speed sensor.
Coupling Installation Two methods of coupling the speed sensor to the pulley shaft are shown
in Figure 2-1 and Figure 2-2. Other methods may work as well. The most
important requirement is that the speed sensor remains free floating and
not rigidly coupled to the conveyor frame.
Use the following procedures for coupling installation:
Method “A” Locate the exact center of tail pulley or snubbing roll shaft. Figure 5-1
may be cut out and used as a centering guide. (Refer to Figure 2-1)
1. Locate circle guide over tail pulley shaft and punch center. Drill a
1-3/4" deep hole using a 17/32" drill. (Drilling a smaller pilot hole is
helpful in assuring correct centering).
2. Tap this hole using a 5/8"-11 tap.
3. Clean out oil and dirt with an appropriate solvent and apply a thread
lock retaining compound, such as "LOCKTITE thread locker 262".
4. Thread in supplied stub shaft coupling (part# 037711) so that
coupling collar bottoms out against tail pulley or snubbing shaft. See
Figure 2-1.
5. Insert 61-12 C speed sensor into coupling. Be sure to align shaft flat
spot with set screws on coupling. Tighten all set screws securely.
Note. Never mount speed sensor on a driven pulley. S

Installation
Overview
2-2 REC 3449 Rev M Thermo Fisher Scientific
Figure 2-1. Method A Installation
Method “B” If customer's tail pulley shaft has a 5/8" diameter stub shaft extending
from it and is concentric with the centerline of the driving shaft, use part
#002931 to couple 61-12 speed sensor to tail pulley shaft. (Refer to
Figure 2-2.) This coupling is not supplied with the speed sensor but may
be purchased separately from Thermo Fisher Scientific.
It would be advisable to provide two flat surfaces, 90°apart, on the stub
shaft for a good set screw holding power.
Align shaft flat spots with set screws on coupling. See Figure 2-2.
Tighten all set screws securely.
Figure 2-2. Method B Installation
Note. If possible, weld coupling to tail pulley shaft. Do not weld to
any part of 61-12 C speed sensor. S