Thermo Scientific 20-35-NM-F User manual

i
Mercury Free Tilt Sensor
User’s Guide
REC 4274 Rev. C Part Number 092241
RAMSEY MERCURY FREE TILT SENSORS
FOR NON-HAZARDOUS AREAS
Manufacturer:
Thermo Fisher Scientific
501 90th Avenue NW
55433 Minneapolis, MN (USA)
[phone]
CONTROL UNITS PROBES
Model 20-35-NM-F Model 20-54-NM-SS
Model 20-35-NM-DIN Model 20-52-NM
Model 20-59-NM
Model 20
-
55
-
N
M
-
P

ii

iii
Revision History
Revision Number Date Released ECO Number Release Specifics
A March 2008 1819 Manual first release
B September 2013 3369 Correct Output Names
C September 2013 3381 Add specifications

iv
2007 Thermo Fisher Scientific. All rights reserved.
This document is confidential and is the property of Thermo Fisher Scientific. It may not be copied
or reproduced in any way without the express written consent of Thermo. This document 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unpublished work of Thermo Fisher Scientific.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this work as an unpublished copyright.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 Scientific 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.
Software Program Licence Terms
The Software Program is licensed, not sold. Thermo Fisher Scientific, grants you a license for the
Software Program only in the country where you acquired the Equipment, as defined below. You
obtain no rights other than those granted you under this license.
The term “Equipment” means the equipment with which the Software Program is used. The term
“Software Program” means the original and all whole or partial copies of the Software Program used
in connection with Equipment sold by Thermo Fisher Scientific to the user, including modified
copies or portions of the Software Program. Thermo Fisher Scientific retains title to the Software
Program, as well as all improvements, modifications and enhancements to the Software Program,
whether made by Thermo Fisher Scientific or any other party. Thermo Fisher Scientific owns, or has
licensed from the owner, copyrights in the Software Program.
You are responsible for the selection of the Equipment.
Following the commissioning of the Equipment, any change made by the user to the Software
Program will terminate all warranties with respect to the Equipment and Software Program.
License
Under this license, you may:
1. Use the Software Program on only one piece of equipment at any one time, unless the license
information specifies otherwise;
2. Copy the Software Program for backup or in order to modify it;
3. Modify the Software Program and/or merge it into another Software Program; and
4. Subject to the following limitations, transfer the possession of the Software Program to another
party, but only in connection with a transfer of the Equipment.

v
If you transfer the Software Program, you must transfer a copy of these License Terms, all other
documentation and at least one complete, unaltered copy of the Software Program to the other party.
Unless you have other copies of the Software Program to be used in connection with other
Equipment purchased from Thermo, or one of its divisions, you must, at the same time, either
transfer all your other copies of the Software Program to the transferee of the Equipment or destroy
them. Your license is then terminated. The other party agrees to these terms and conditions by its
first use of the Software Program.
You must reproduce the copyright notices(s) on each copy of the Software Program.
You may not:
1. Use, copy, modify, merge, or transfer copies of the Software Program except as provided in this
license;
2. Reverse engineer, decompile, or disassemble the Software Program; or
3. Sub-license, rent, lease, or assign the Software Program.
Limitation of Remedies
Thermo Fisher Scientific entire liability under this license is the following:
Thermo Fisher Scientific will: (a) replace defective media, or (b) make a warranted Software
Program operate or (c) replace the Software Program with a functionally equivalent Software
Program, as warranted.
For any claim (including breach), in any form, related in any way to this license, Thermo Fisher
Scientifics liability will be for the actual value of the Software Program.
Thermo Fisher Scientific will not be liable for any lost profits, lost savings, any incidental damages,
or other economic consequential damages, even if Thermo, or its authorized supplier, has been
advised of the possibility of such damages. Thermo Fisher Scientific will not be liable for any
damages claimed by you based on any third party claim.
General
Thermo Fisher Scientific may terminate your license if you fail to comply with the terms and
conditions of this license. In such event, you must destroy all your copies of the Software Program.
You are responsible for payment of any taxes, including personal property taxes, resulting from this
license.
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 authorized inspector. Thermo Fisher
Scientific will use their best efforts to remedy such violation at a reasonable cost to the buyer.

vi

vii
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,
transportation 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 two (2) years after delivery, or two (2) years 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 insofar as it relates to repairs, alterations, or modifications, shall not
be applicable to routine preventive and corrective 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 SIMILAR ITEM FREE FROM DEFECT, AND THE CORRECTION OF ANY DEFECT
IN WORKMANSHIP. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INCIDENTAL
OR CONSEQUENTIAL DAMAGES.”
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]

viii
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 guarantee, 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.

ix
Table of Contents
Table of Contents.................................................................................................................. ix
List of Figures ........................................................................................................................ x
List of Tables .......................................................................................................................... x
About this Manual ............................................................................................................... xii
Who Should Use this Manual? ......................................................................................... xii
Standards Applied and Technical Specifications.............................................................. xii
Organization of the Manual ..............................................................................................xiii
Documentation Conventions ............................................................................................xiii
Safety Messages............................................................................................................. xiv
General Precaution ......................................................................................................... xiv
Safety in Use ................................................................................................................... xiv
Safety in Maintenance..................................................................................................... xiv
How to Get Help ............................................................................................................... xv
Certifications....................................................................................................................xvii
Chapter 1 Introduction................................................................................................... 1-1
1.1 Applications ..........................................................................................................1-1
1.2 Probe Models ......................................................................................................1-1
1.2.1 Specifications ................................................................................................1-2
1.3 Control Units.........................................................................................................1-3
1.3.1 Model 20-35-NM-F (Field Mount Version) .....................................................1-3
1.3.2 Model 20-35-NM-DIN (Internal Cabinet Version) ..........................................1-4
1.4 Symbol Identification ............................................................................................1-5
Chapter 2 Installation..................................................................................................... 2-1
2.1 Control Unit Installation.........................................................................................2-1
2.2 Probe Installation..................................................................................................2-3
2.3 Electrical Installation.............................................................................................2-8
Chapter 3 Operation....................................................................................................... 3-1
3.1 System Configuration ...........................................................................................3-3
3.1.1 Model 20-35-NM-F Function Modes..............................................................3-3
3.1.2 Model 20-35-NM-F Switches Setting.............................................................3-4
3.1.3 Model 20-35-NM-DIN Function Modes..........................................................3-5
3.1.4 Model 20-35-NM-DIN Switches Setting.........................................................3-6
Chapter 4 Maintenance and Troubleshooting ............................................................. 4-1
4.1 Indications of Maintenance...................................................................................4-1
4.2 Control Unit Model 20-35-NM-F Check Procedure...............................................4-2
4.3 Control Unit Model 20-35-NM-DIN Check Procedure...........................................4-2
Chapter 5 Service Repair and Replacement Parts ...................................................... 5-1
5.1 Parts Ordering Information ...................................................................................5-2

x
Chapter 6 Decommissioning and Dismantling ............................................................. 6-1
6.1 Decommissioning of the System ..........................................................................6-1
6.2 Dismantling the Unit .............................................................................................6-1
Chapter 7 Labels ............................................................................................................. 7-1
7.1 Control Unit Mod.20-35-NM-F Labels ..................................................................7-1
7.2 Control Unit Mod.20-35-NM-DIN Labels ..............................................................7-2
7.3 Probe Label..........................................................................................................7-3
List of Figures
Figure 2-1: Tilt Control Unit Model 20-35-NM-F Dimensions............................................2-1
Figure 2-2: Tilt Control Unit Model 20-35-NM-DIN Dimensions.........................................2-2
Figure 2-3: Tilt Sensor Model 20-54-NM-SS .....................................................................2-4
Figure 2-4: Tilt Sensor Model 20-52-NM ...........................................................................2-5
Figure 2-5: Tilt Sensor Model 20-59-NM ...........................................................................2-6
Figure 2-6: Tilt Sensor Model 20-55-NM-P........................................................................2-7
Figure 2-7: Control Unit Model 20-35-NM-F Terminal Wiring ...........................................2-8
Figure 2-8: Control Unit Model 20-35-NM-F Internal Layout ............................................2-9
Figure 2-9: Control Unit Model 20-35-NM-DIN Terminal Wiring .....................................2-10
Figure 2-10: Control Unit Model 20-35-NM-DIN Internal Layout ....................................2-11
List of Tables
Table 1-1: Symbol Identification ........................................................................................1-5
Table 3-1: Model 20-35-NM-F Function Modes Switch Settings ......................................3-3
Table 3-2: SW1and SW2 Settings .....................................................................................3-4
Table 3-3: SW3 Settings....................................................................................................3-4
Table 3-4: SW5 Settings....................................................................................................3-4
Table 3-5: SW4 Settings....................................................................................................3-4
Table 3-6: Model 20-35-NM-DIN Function Modes Switch Settings ..................................3-5
Table 3-7 SW1 and SW2 Settings ....................................................................................3-6
Table 3-8 SW3 Settings......................................................................................................3-6
Table 3-9 SW5 Settings.....................................................................................................3-6

xi

xii
About this Manual
This manual contains the information necessary in order to guarantee a safety an
correct use of the Ramsey Mercury Free Tilt Sensor system (Control Units with
Probe).
Read this manual before working with the product. For personal and system safety
and for best product performance, make sure you thoroughly understand the contents
before using this product.
The manufacturer has a policy of constantly developing and upgrading its products
and hence may make changes without prior notice.
Who Should Use this Manual?
This manual is a learning resource and reference for specialised technical personnel
concerned with installing, operating or maintaining the probe and control.
Standards Applied and Technical Specifications
The system has been made in compliance with the EC, standards.
The products are supplied complete with all the documentation required by these
standards. The installation, use and maintenance manual is an integral part of this
documentation and contains all the informations needed to ensure the efficent
operation of the system, with particular regard to personnel safety.
The following standards have been referred to the design of the Ramsey Mercury
Free Tilt Sensor system:
CAN/CSA-C22.2 Safety Requirements for electrical equipment for Measurement, Control,
No. 61010-1-04 and Laboratory: Use- Part 1 General Requirements
UL Std. No. 61010-1 Safety Requirements for electrical equipment for Measurement, Control,
and Laboratory: Use- Part 1 General Requirements
EC 93/68 Low Voltage Directive
EN 61010 : 2001 Safety Requirements for Electrical Equipment for Measurement
EN 61326-1 :2006 (EMC)

xiii
Organization of the Manual
This manual is organized into 8 chapters.
Chapter 1: Introduction - provides a functional overview of the system and the
technical specifications.
Chapter 2: Installation - provides the steps and instructions necessary to install the
equipment
Chapter 3: Operation – provides information on equipment operation.
Chapter 4: Maintenance and Troubleshooting – provides information on any
maintenance of the equipment and troubleshooting if appropiate.
Chapter 5: Service, Repair, and Replacement Part – discusses how to contact
Thermo Fisher Scientific service departments for assistance and how to order parts
for the equipment.
Chapter 6. Decommissioning and Dismantling
Chapter 7 Labels - provides information on labels description and position.
Documentation Conventions
The following conventions are used in this manual to help easily identify certain
types of information:
Italic is used to introduce new terms and for emphasis.
Italic/blue type is used for references to other sections of the manual and serve
as links in electronic documents.
The names of setup, calibration displays, menu displays, and variables are
shown in full capitals.
The names of keys are shown in BOLD CAPITALS.
Note: Provides information of special importance to the reader.
This symbol indicates a HINT in the text that may be of value but not
necessary for operation.

xiv
Safety Messages
Instructions in this manual may require special precautions to ensure the safety of
the personnel performing the operations.
Please read the safety information before performing any operation preceded by this
symbol.
There are two levels of safety messages: warnings and cautions. The distinction
between the two is as follows:
WARNING
Failure to observe could result in death or serious
injury.
CAUTION
Failure to observe may cause minor injury or
damage the equipment
General Precaution
Do not install, operate, or perform any maintenance procedures until you have read
the safety precautions presented.
The manufacturer is deemed absolved of all liability in the following
circumstances:
-If the products is used improperly
-If the product has not been installed in accordance with the
instructions in this manual
-If the product has been installed in an environment that does
not comply with the conditions set by the manufacturer
-If the product has been altered by the customer in any way
without the express written authorisation of the
manufacturer
-If the user has not followed the instructions given in this
manual
-If the product has suffered the consequences of exceptional
events such as floods, earthquakes, etc. And has been put
back into operation without the necessary checks being
made

xv
WARNING
Failure to follow safe installation and servicing
procedures could result in death or serious injury.
Make sure only qualified personnel perform
installation and maintenance procedures in
accordance with the instructions in this manual.
Allow only qualified electricians to open and work in
the electronics enclosure
WARNING
High voltage that may be present on leads could
cause electrical shock.
All switches must be OFF when checking input AC
electrical connections, removing or inserting printed
circuit boards, or attaching voltmeters to the
system.
Use extreme caution when testing in, on, or around
the electronics cabinet, PC boards, or modules.
There are voltages in excess of 115 V or 230 V in
these areas.
WARNING
Use only the procedures and new parts
specifically referenced in this manual to ensure
specification performance and certification
compliance. Unauthorized procedures or parts
can render the instrument dangerous to life, limb,
or property.
Safety in Use
Once the products has been installed before starting work check:
-For visible defects on the safety devices
-For correct operation of the device
Safety in Maintenance
Before carrying out any maintenance operation on the products it is mandatory:
-Read this instruction manual
-Use the correct tools for the maintenance operations that
have to be done
-Do not clean the electrical parts with water or other fluid
-On completing the repair work, then that all the tools
have been collected up

xvi
WARNING
Only qualified personnel are allowed to carry out
maintenance work.
Maintenance staff must wear working clothes and
individual protective equipment in conformity with
safety legislation and binding safety standards.
Any alteration to the product or replacement of any
parts made without the manufacturer’s
authorisation may cause an accident hazard and
absolves the manufacturer from all civil and
criminal liability.
If an emergency situation arises because of a fire, it
is forbidden to use water toput the fire out, always
user powder-type extinguishers.
How to Get Help
WARNING
Unless you are directed to do so by an authorized
service representative of Thermo Fisher Scientific,
you should not attempt to perform any
troubleshooting or maintenance procedures that
are not described in this manual.
Failure to comply with these warnings can result in
exposure to high voltages or high temperatures,
which can cause personal injury.

xvii
Certifications
CONTROL UNIT
Model : 20-35-NM-F
TAG MARKING
CE Certification CE
CSA International -40°F (-40°C) ≤Ta ≤+122°F (+50°C)
Master Contract : 158791
Model : 20-35-NM-DIN
TAG MARKING
CE Certification CE
CSA International -40°F (-40°C) ≤Ta ≤+122°F (+50°C)
Master Contract : 158791

xviii
PROBE
Models : 20-54-NM-SS / 20-52-NM / 20-59-NM / 20-55-NM-P
TAG MARKING
CE Certification CE

1-1
Chapter 1
Introduction
This chapter describes the applications appropiate for the control units for Mercury Free Tilt Sensor
system and their respective specifications.
1.1 Applications
The strong and simple structure allows for safety in operation and ease of
installation. The principal use conditions are:
-Silos and hopper
-Stock pilings
-Blocking in the charge/discharge areas of conveyor belt
openings
-Signal for material’s presence or lack-of on a conveyor belt
-In other applications where the effect is tilt of the probe.
The probe actuates when it is tilted 15 degrees or more from
it’s vertical position.
1.2 Probe Models
Model 20-54-NM-SS Stainless Steel Probe (AISI 304)
Model 20-52-NM Heavy Duty 2” Metal Probe
Model 20-59-NM Standard Probe, Nickel Chrome Plated Casting
Model 20-55-NM-P Standard Probe, PVC
ACCESSORY AVAILABLES ON REQUEST :
For Model 20-52-NM WEAR PADDLE for extension or anti-abrasion
For Model 20-59-NM WEAR PADDLE for extension or anti-abrasion
STAINLESS STEEL FLOAT BALL
PLASTIC FLOAT BALL
For Model 20-55-NM-P PLASTIC FLOAT BALL

1-2
1.2.1 Probe Specifications
Operating Voltage: (From Control Units Model 20-35-NM-F / Model 20-35-NM-DIN)
Current Flow: Vertical Position 18 mA approx.
Tilted (Inclination Probe Higher 15°) 8 mA approx.
Supply Shorted 26 mA approx.
Failure Supply (Circuit Open) 0 mA
Temperature Ratings: -40°F(-40°C) ≤Ta ≤+122°F(+50°C)
Dimensions: See Figures Chapter 2
Tilt Angle: > 15°
Probe Cable Length: Standard 8m (25 ft); Other lengths on request