Rosemount Manual: Rosemount 2110 Compact Vibrating Fork Liquid Level Switch Manuals & Guides
Rosemount™ 2110 Level Switch
Vibrating Fork
Reference Manual
00809-0100-4029, Rev DA
March 2022
Safety messages
NOTICE
Read this manual before working with the product. For personal and system safety, and for optimum product performance,
ensure you thoroughly understand the contents before installing, using, or maintaining this product.
For technical assistance, contacts are listed below:
Customer Central
Technical support, quoting, and order-related questions.
• United States - 1-800-999-9307 (7:00 am to 7:00 pm CST)
• Asia Pacific- 65 777 8211
North American Response Center
Equipment service needs.
• 1-800-654-7768 (24 hours a day — includes Canada)
• Outside of these areas, contact your local Emerson representative.
WARNING
Failure to follow safe installation and servicing guidelines could result in death or serious injury.
Ensure the level switch is installed by qualified personnel and in accordance with applicable code of practice.
Use the level switch only as specified in this manual. Failure to do so may impair the protection provided by the level switch.
WARNING
Explosions could result in death or serious injury.
The level switch must only be installed and operated in non-hazardous (ordinary) locations.
WARNING
Electrical shock could cause death or serious injury.
Ensure the power to the level switch is off, and the lines to any other external power source are disconnected or not powered while
wiring the level switch.
Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical shock.
Ensure the wiring is suitable for the electrical current and the insulation is suitable for the voltage, temperature, and environment.
WARNING
Process leaks could result in death or serious injury.
Ensure the level switch is handled carefully. If the process seal is damaged, gas might escape from the vessel (tank) or pipe.
2
WARNING
Any substitution of non-recognized parts may jeopardize safety. Repair (e.g. substitution of components) may also
jeopardize safety and is not allowed under any circumstances.
Unauthorized changes to the product are strictly prohibited as they may unintentionally and unpredictably alter performance and
jeopardize safety. Unauthorized changes that interfere with the integrity of the welds or flanges, such as making additional
perforations, compromise product integrity and safety. Equipment ratings and certifications are no longer valid on any products
that have been damaged or modified without the prior written permission of Emerson. Any continued use of product that has
been damaged or modified without the written authorization is at the customer’s sole risk and expense.
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end users’ equipment. This could
be intentional or unintentional and needs to be protected against.
Physical security is an important part of any security program and fundamental to protecting your system. Restrict physical access
by unauthorized personnel to protect end users’ assets. This is true for all systems used within the facility.
CAUTION
The products described in this document are NOT designed for nuclear-qualified applications.
Using non-nuclear qualified products in applications that require nuclear-qualified hardware or products may cause inaccurate
readings.
For information on Rosemount nuclear-qualified products, contact your local Emerson Sales Representative.
CAUTION
Hot surfaces
The flange and process seal may be hot at high process temperatures. Allow to cool before servicing.
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4
Reference Manual Contents
00809-0100-4029 March 2022
Contents
Chapter 1 Introduction.............................................................................................................. 7
1.1 Using this manual........................................................................................................................ 7
1.2 Product certifications...................................................................................................................7
1.3 Product recycling/disposal...........................................................................................................7
Chapter 2 Level switch overview................................................................................................ 9
2.1 Measurement principles.............................................................................................................. 9
2.2 Process characteristics.................................................................................................................9
2.3 Vessel characteristics...................................................................................................................9
2.4 Application examples.................................................................................................................10
2.5 Components of the level switch.................................................................................................12
Chapter 3 Mechanical installation............................................................................................ 15
3.1 Safety messages........................................................................................................................ 15
3.2 Installation considerations.........................................................................................................16
3.3 Installation procedures.............................................................................................................. 21
Chapter 4 Electrical installation................................................................................................27
4.1 Safety messages........................................................................................................................ 27
4.2 Prepare the electrical connections............................................................................................. 28
4.3 Connect wiring and power up.................................................................................................... 34
Chapter 5 Operation................................................................................................................ 37
5.1 LED indication status..................................................................................................................37
Chapter 6 Service and troubleshooting.................................................................................... 39
6.1 Safety messages........................................................................................................................ 39
6.2 Magnetic test point....................................................................................................................40
6.3 Visual inspection........................................................................................................................40
6.4 Maintenance..............................................................................................................................41
6.5 Troubleshooting........................................................................................................................41
6.6 Spare parts................................................................................................................................ 43
6.7 Service support..........................................................................................................................43
Appendix A Specifications and reference data............................................................................. 45
A.1 General......................................................................................................................................45
A.2 Physical specifications............................................................................................................... 45
A.3 Performance specifications........................................................................................................46
A.4 Electrical specifications..............................................................................................................47
A.5 Environmental specifications.....................................................................................................48
A.6 Dimensional drawings............................................................................................................... 49
Rosemount 2110 Level Switch 5
Contents Reference Manual
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6 Reference Manual
Reference Manual Introduction
00809-0100-4029 March 2022
1 Introduction
1.1 Using this manual
The sections in this manual provide detailed information on installing, operating, and
maintaining the Rosemount 2110 Level Switch - Vibrating Fork.
The sections are organized as follows:
Level switch overview provides a description of the level switch and its basic principles.
Mechanical installation contains mechanical installation instructions.
Electrical installation contains electrical installation instructions.
Operation contains operation and maintenance techniques.
Service and troubleshooting provides troubleshooting techniques for the most common
operating problems.
Specifications and reference data supplies reference and specification data.
1.2 Product certifications
See the Rosemount 2110 Product Certifications document for detailed information on the
existing approvals and certifications.
1.3 Product recycling/disposal
Recycling of equipment and packaging should be taken into consideration and disposed of
in accordance with local and national legislation or regulations.
Related information
Service support
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2 Level switch overview
2.1 Measurement principles
Using the principle of a tuning fork, a piezo-electric crystal oscillates the forks at their
natural frequency. Changes to the oscillation frequency are continuously monitored by
electronics as it varies depending on the liquid medium in which the forks are immersed.
The denser the liquid, the lower the oscillation frequency.
When used as a low-level point alarm, the liquid medium in the vessel (tank) or pipe drains
down past the fork, causing a change of oscillation frequency that is detected by the
electronics and switches the output state i.e. wet-to-dry.
When the level switch is used as a high-level point alarm, the liquid rises in the vessel
(tank) or pipe making contact with the fork and causing the output state to switch i.e. dryto-wet.
2.2 Process characteristics
Emerson's vibrating fork technology is virtually unaffected by turbulence, foam, solids
content, coating products, and liquid properties. The natural frequency (1300 Hz) of the
fork avoids interference from plant vibration that may cause false switching to a wet state.
This allows for minimum intrusion into the tank or pipe using a short fork.
2.3 Vessel characteristics
The level switch should be mounted using its process connection, and in a horizontal or
vertical orientation so that the liquid medium can flow freely in the gap between the forks.
A vessel (tank) or pipe can be almost any shape or type, but check that the process
conditions are within the operating limits of the level switch.
Avoid installing near agitators and inlet pipes where the forks are likely to be splashed and
cause a false switch to a wet state.
Never force the level switch into a vessel (tank) or pipe space. Any contact with the
opposite wall, or in-tank objects, could damage the forks and other wetted-process parts.
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2.4 Application examples
Overfill prevention
Spillage caused by overfilling can be hazardous to people and the environment, resulting
in lost product and potentially high clean-up costs.
High and low level point alarm
Maximum and minimum level detection in tanks containing different types of liquids are
ideal applications. It is common practice to have an independent high level alarm switch as
a backup to an installed level device in case of primary failure.
Pump control or limit detection
Many processes have batching and header tanks with the need to control a pump to
maintain levels between set points. The Rosemount 2110 is ideal for these situations,
since these tanks are often manufactured from thin wall materials and cannot support the
weight of heavy instrumentation.
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Pump protection or empty pipe detection
With the fork projecting only 2 in. (50 mm) (dependent on connection type), the
Rosemount 2110 can be installed in small diameter pipes. Short forks mean minimum
intrusion on the wetside and allow for simple, low cost installation at any angle into pipes
or tanks. By selecting the option of direct load switching electronics, the Rosemount 2110
is ideal for reliable pump control and can be used to protect against pumps running dry.
Leak detection
Flanges, gaskets, seals, corrosive liquids all have the potential to leak at the most
inconvenient times. Many use site tanks and vessels above trays, or in containments to
prevent any liquids from escaping. A Rosemount 2110 can quickly and accurately detect
any leakage, thereby eliminating costs.
Hygienic applications
With the highly polished forks option providing a surface finish (Ra) better than 0.8 μm,
the Rosemount 2110 meets the most stringent hygienic requirements used in food and
beverage, and pharmaceutical applications. The Rosemount 2110 is robust enough to
easily withstand CIP (Clean-In- Place) and SIP (Steam-In-Place) cleaning routines.
Rosemount 2110 Level Switch 11
A
B
C
E
D
F
Level switch overview Reference Manual
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2.5 Components of the level switch
Figure 2-1 shows the components of a Rosemount 2110.
Figure 2-1: Rosemount 2110 Features
2.5.1
2.5.2
A. Industry standard DIN 43650 plug/socket
B. Stainless steel housing with magnetic test point
C. Hexagonal nut for tightening a threaded process connection, and for fork orientation
D. Threaded and Tri Clamp process connection options
E. ‘Fast drip’ fork design
F. Visible ‘heartbeat’ LED
Short fork technology
Using short-fork technology, the device can be used in almost all liquid applications.
Extensive research has maximized the operational effectiveness of the fork design, making
it suitable for most liquid mediums including coating liquids, aerated liquids, and slurries.
Fork design
The “fast drip” design allows the liquid to be quickly drawn away from the fork tip, making
the Rosemount 2110 quicker and more responsive in high density or viscous liquid
applications.
Figure 2-2: “Fast drip” forks
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2.5.3 Heartbeat LED
The level switch has a ‘heartbeat’ LED indicating it is operating, and can be seen at all
times. The LED flashes when the level switch output is ‘off’ and is constantly lit when 'on'.
2.5.4 Magnetic test point
A magnetic test point is located on the side of the housing, allowing a functional test of
the Rosemount 2110 and a system connected to it. Holding a magnet to the test point
causes the output to change state.
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Level switch overview Reference Manual
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Reference Manual Mechanical installation
00809-0100-4029 March 2022
3 Mechanical installation
3.1 Safety messages
Instructions and procedures in this section may require special precautions to ensure the
safety of the personnel performing the operations. Information that potentially raises
safety issues is indicated by a warning symbol ( ). Refer to the following safety messages
before performing an operation preceded by this symbol.
WARNING
Failure to follow safe installation and servicing guidelines could result in death or
serious injury.
Ensure the level switch is installed by qualified personnel and in accordance with
applicable code of practice.
Use the level switch only as specified in this manual. Failure to do so may impair the
protection provided by the level switch.
Repair, e.g. substitution of components, etc. may jeopardize safety and is under no
circumstances allowed.
WARNING
Explosions could result in death or serious injury.
The level switch must only be installed and operated in non-hazardous (ordinary)
locations.
WARNING
Electrical shock could cause death or serious injury.
Ensure the power to the level switch is off, and the lines to any other external power
source are disconnected or not powered while wiring the level switch.
Avoid contact with the leads and terminals. High voltage that may be present on leads can
cause electrical shock.
Ensure the wiring is suitable for the electrical current and the insulation is suitable for the
voltage, temperature, and environment.
WARNING
Process leaks could result in death or serious injury.
Ensure the level switch is handled carefully. If the process seal is damaged, gas might
escape from the vessel (tank) or pipe.
Rosemount 2110 Level Switch 15
OKOK
Mechanical installation Reference Manual
March 2022 00809-0100-4029
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or
misconfiguration of end users’ equipment. This could be intentional or unintentional and
needs to be protected against.
Physical security is an important part of any security program and fundamental to
protecting your system. Restrict physical access by unauthorized personnel to protect end
users’ assets. This is true for all systems used within the facility.
CAUTION
Hot surfaces
The flange and process seal may be hot at high process temperatures. Allow to cool before
servicing.
3.2 Installation considerations
Before installing the level switch, review the safety, environmental, application, and preinstallation sections.
3.2.1
Environmental considerations
The Rosemount 2110 is weatherproof and protected against the ingress of dust, but must
be protected from flooding. Avoid installing the level switch near heat sources.
Figure 3-1: Environmental Considerations
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