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 Equipment ratings and certifications are no longer valid on any products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.
3
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
March 2022 00809-0100-4029
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
Rosemount 2110 Level Switch 7
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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.
Rosemount 2110 Level Switch 9
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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
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March 2022 00809-0100-4029
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.
Rosemount 2110 Level Switch 13
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Reference Manual Mechanical installation
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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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OK
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3.2.2 Application considerations
The Rosemount 2110 is a wired point-level device for use on open or closed vessels (tanks)
and in pipework containing liquid mediums.
For most liquids, including coating, aerated liquids and slurries, the function is virtually
unaffected by flow, turbulence, bubbles, foam, vibration, solid particles, build-up, or
properties of the liquid medium.
Avoid process medium build-up on the forks
Avoid situations where a drying and coating process medium may create an excessive
build-up or implement preventative maintenance programs to ensure the build-up is not
enough to impair performance (see Figure 3-2).
Always ensure:
• There is sufficient distance between build-up on the tank wall and the fork.
• There is no risk of ‘bridging’ the level switch forks.
Examples of products that can create ‘bridging’ of forks and impair performance are
dense paper slurries and bitumen.
Figure 3-2: Avoid Product Build-up
Operating temperature and pressure ranges
Ensure the process is operating within the instrument operating temperature and pressure
ranges.
Liquid density requirements
Minimum liquid density is 37.5 lb/ft3 (600 kg/m3).
Liquid viscosity range
0.2 to 10000 cP (centiPoise)
Rosemount 2110 Level Switch 17
SP
HY
SP
0.5
(13)
0.1
(2.5)
0.5
(13)
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Solids content in the liquid medium
As a guideline, the maximum solid particle diameter in the liquid process medium is 0.2 in.
(5 mm). Extra consideration is needed when solid particles are bigger than 0.2 in. (5 mm)
and advice should be sought from Emerson.
Foams
In almost all cases, the Rosemount 2110 is insensitive to foams (i.e. does not see the
foam).
However in rare occasions, some very dense foams may be seen as liquid; known examples
of this are found in ice-cream and orange juice manufacturing.
Switching point
The switching point varies with different liquid densities. The switching point (SP) and
hysteresis (HY) for water are shown in Figure 3-3.
Figure 3-3: Switching Point in Inches (Millimeters)
Note
When mounted vertically, a low density medium has a switching point closer to the
process connection. A high density medium has a switching point closer to fork tip.
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3.2.3 Pre-installation considerations
Measurement accuracy is dependent upon the proper installation of the device. Keep in
mind the need for easy access, personnel safety, practical field calibration, and a suitable
environment for the device.
Device identification
To identify a version of the level switch, see the label on the housing.
How to handle a level switch
Do not hold a level switch by the forks (see Figure 3-4).
Figure 3-4: Handling
Make no alterations to the level switch
Never make any alterations to the mechanical or electrical features of the level switch.
Figure 3-5: Make No Alterations
Allow adequate space outside tank or pipe
Mount the level switch in a position to allow easy access to the wiring terminals. Ensure
there is sufficient room for making electrical connections.
Mounting orientation
Mount the Rosemount 2110 at any angle that allows the level of the process medium to
rise, fall, or flow through the fork gap.
Rosemount 2110 Level Switch 19
D
A
B
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March 2022 00809-0100-4029
Related information
Correct fork alignment
Hygienic installation
For hygienic applications, the level switch must be hygienically cleaned before installation
and handled in strict accordance with hygienic standards.
Refer to the Rosemount 2110 Product Certifications document for hygienic approvals and
compliance requirements.
Pipe installation requirements
• The inside pipe diameter (D) must be 1.4 in. (35 mm) or larger.
• Ensure the fork tines intrude at least 0.9 in. (22 mm) into the pipe.
• Keep at least 0.3 in. (7 mm) of clearance between the fork tines and the pipe wall.
Figure 3-6: Pipe Installation
A. Minimum intrusion 0.9 in. (22 mm)
B. Minimum clearance 0.3 in. (7 mm)
Other recommendations
• Always install in the normally “on” state.
— High-level alarm: recommended Mode setting is Dry = on.
— Low-level alarm: recommended Mode setting is Wet = on.
• Avoid:
— Installing near to liquid entering the tank at the filling-point.
— Heavy splashing on the forks.
• Always ensure:
— The overall system is tested during commissioning by using the local magnetic test
point.
— The installation does not create tank crevices around the forks where a liquid
medium may collect. This event can happen with high-viscosity and high-density
liquids.
— The forks do not come into contact with the vessel (tank) or pipe wall, internal
fittings, or any other obstructions.
20 Reference Manual
B
A
C
D
F
E
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00809-0100-4029 March 2022
• Extra consideration is needed if the plant vibration is close to the 1300 Hz operating
frequency of the fork.
3.3 Installation procedures
3.3.1 Process connection seals
Figure 3-7: Process Connection Seals
A. PTFE tape
B. NPT or BSPT (R) thread
C. Gasket
D. BSPP (G) thread
E. Tri Clamp
Rosemount 2110 Level Switch 21
F. The Tri Clamp seal is supplied in an accessory kit
OK
A
B
OK
OK
OK
OK OK
A
B
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3.3.2 Correct fork alignment
Fork alignment in a pipe installation
The fork is correctly aligned by positioning the groove or notch as indicated (Figure 3-8).
Figure 3-8: Correct Fork Alignment for Pipe Installation
A. Tri Clamp process connections have a circular notch
B. Threaded process connections have a groove
Fork alignment in a vessel (tank) installation
The fork is correctly aligned by positioning the groove or notch as indicated (Figure 3-9).
Figure 3-9: Correct Fork Alignment for Vessel (Tank) Installation
A. Tri Clamp process connections have a circular notch
B. Threaded process connections have a groove
22 Reference Manual
A
A
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3.3.3 Mounting the threaded version
Threaded vessel (tank) or pipework connection
Procedure
1. Seal and protect the threads. Use anti-seize paste or PTFE tape according to site
procedures.
A gasket may be used as a sealant for BSPP (G) threaded connections.
2. Screw the level switch into the process connection.
Note
Tighten using the hexagon nut only.
Figure 3-10: Vertical Installation
A. Gasket for BSPP (G) threaded connection
Figure 3-11: Horizontal Installation
A. Gasket for BSPP (G) threaded connection
Rosemount 2110 Level Switch 23
A
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Threaded flange connection
Procedure
1. Place the customer-supplied flange and gasket on the vessel (tank) nozzle.
A. Gasket (customer supplied)
2. Tighten the bolts and nuts with sufficient torque for the flange and gasket.
3. Seal and protect the threads. Use anti-seize paste or PTFE tape according to site
procedures.
A gasket may be used as a sealant for BSPP (G) threaded connections.
24 Reference Manual
A
A
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00809-0100-4029 March 2022
4. Screw the level switch into the flange thread.
Note
Tighten using the hexagon nut only.
A. Gasket for BSPP (G) threaded connection
3.3.4
Mounting the Tri Clamp version
Procedure
1. Lower the level switch into the flange face.
A. Seal (supplied with Tri Clamp)
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2. Fit the Tri Clamp.
Note
The Tri Clamp and seal are supplied in an accessory kit that has to be ordered
separately. See the Rosemount 2110 Product Data Sheet for ordering information.
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4 Electrical installation
4.1 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 27
Electrical 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.
4.2 Prepare the electrical connections
4.2.1 Cable selection
Twisted-pairs and shielded wiring is recommended for environments with high EMI
(electromagnetic interference). Two wires can be safely connected to each terminal screw.
Maximum wire size is 15 AWG.
4.2.2
Cable glands/conduits
The cable gland is integrated in the four-position plug of the level switch. Do not make any
modifications to the level switch.
28 Reference Manual
0V/N
+V/L
PE
Load
+V
0V
PLC
PE
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4.2.3 Electronics options
Figure 4-1: Direct Load Switching – Electronics Option Code 0
Table 4-1: Electrical Parameters – Electronics Option Code 0
Parameter Value
Load switching ac/dc
Direct load switching ac/dc
Maximum switched load 500 mA
Maximum peak load 5 A for 40 ms maximum
Minimum switched load 20 mA continuous
Voltage drop 6.5 V @ 24 Vdc or 5 V @ 240 Vac
Current draw (load off) < 3 mA continuous
Figure 4-2: PNP Switching – Electronics Option Code 1
Table 4-2: Electrical Parameters – Electronics Option Code 1
Parameter Value
PNP output dc
PNP for PLC/SPS connection dc
Maximum switched load 500 mA
Maximum peak load 5 A for 40 ms maximum
Voltage drop < 3 V
Supply current 3 mA nominal
Output current (load off) < 0.5 mA
Rosemount 2110 Level Switch 29
1
3
2
A B
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4.2.4 Power supply
The Direct Load electronics operate on 21 - 264 Vdc or 21 - 264 Vac (50/60 Hz) at the level
switch terminals.
The PNP electronics operate on 18 - 60 Vdc at the level switch terminals.
4.2.5 Mode selection
Table 4-3 and Table 4-4 show how the mode selection is determined from the wiring
connections. Modes are “Dry on, high level alarm” and “Wet on, low level alarm”.
Figure 4-3: Wiring Connections Orientation
A. Orientation cut-out
B. PE (ground)
30 Reference Manual
R
N (21-264 Vac, 50/60 Hz)L1
0 V (21-264 Vdc)+V
2A
(T)
1
3
R
N (21-264 Vac, 50/60 Hz)L1
0 V (21-264 Vdc)+V
2A
(T)
1
2
R = external load (must be wired)
R
PLC input
(18-60 Vdc)0 V +V
2A
(T)
1
2
3
R
PLC input
(18-60 Vdc)
0 V
+V
2A
(T)
1
2
3
R = external load
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Table 4-3: Mode Selection By Customer Wiring – Electronics Option Code 0
Mode: dry on, high level alarm Mode: wet on, low level alarm
Table 4-4: Mode Selection By Customer Wiring – Electronics Option Code 1
Mode: dry on, high level alarm Mode: wet on, low level alarm
Rosemount 2110 Level Switch 31
0 V
+V
PLC
Sig
∆U
<3V
L
123
+
-I/P
PLC
L
<100µA
123
+
-I/P
PLC
∆U
<3V
L
132
+
-I/P
PLC
L
<100µA
132
+
-I/P
PLC
0 V
+V
R
I
L
V
1
2
3
+V
0 V
∆U
<3V
<100µA
L
1
2
3
+V
0 V
1
2
3
+V
0 V
∆U
<3V
1
2
3
+V
0 V
<100µA
L
V
L /+V
R
I
L
∆U
<12 V
0 VN+V
L1
1
3
<3 mA
0 V
N
+V
L1
1
3
∆U
<12 V
0 VN+V
L1
1
2
<3 mA
0 V
N
+V
L1
1
2
= Load on
= Load off
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4.2.6 Functions
Table 4-5 shows the switched electrical outputs from the PNP and Direct Load electronics
for each mode selection.
Table 4-5: Functions
Mode: dry on, high level alarm Mode: wet on, low level alarm
PLC (positive output)
PNP dc
Load switching ac/dc
LED
Electrical load
LED on continuously LED flashes every
second
LED on continuously LED flashes every
second
32 Reference Manual
B
B
C C
D
A
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Note
For direct load switching, a DPST (Double Pole, Single Throw) (on/off) switch must also be
fitted for safe disconnection of the power supply. Fit the DPST switch as near to the
Rosemount 2110 as possible, keeping the switch free of obstructions. Label the switch to
indicate it is the supply disconnection device for the Rosemount 2110.
Relay connection warning (for direct load switching)
The Rosemount 2110 requires a minimum current of 3 mA, which continues to flow when
it is ‘off’. When selecting a relay to wire in series with the Rosemount 2110, the drop-out
voltage of the relay must be greater than the voltage generated across the relay coil when
3 mA flows through it.
4.2.7 Grounding
Make sure grounding is done according to national and local electrical codes. Failure to do
so may impair the protection provided by the equipment.
Signal cable shield grounding at power supply end
Make sure the instrument cable shield is:
• Trimmed close and insulated from touching the housing.
• Continuously connected throughout the segment.
• Connected to a good earth ground at the power supply end.
Figure 4-4: Signal Cable Shield Grounding at Power Supply End
A. Trim shield and insulate
B. Minimize distance
C. Trim shield
D. Connect shield back to the power supply ground
Rosemount 2110 Level Switch 33
B
B
C C
A
D
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March 2022 00809-0100-4029
Signal cable shield grounding at instrument end
Make sure the instrument cable shield is:
• Trimmed close and insulated at the power supply end.
• Continuously connected throughout the segment.
• Connected to the potential earth (ground) terminal at the instrument end.
Figure 4-5: Signal Cable Shield Grounding at Instrument End
A. Trim shield and insulate
B. Minimize distance
C. Trim shield
D. Connect shield ground at instrument end
4.3 Connect wiring and power up
The Rosemount 2110 meets IP66 and IP67 weatherproof ratings when correctly
assembled with the supplied connector and suitable cable. Ensure seals are in place to
maintain the weatherproof ratings.
Procedure
1. Verify the power supply is disconnected.
34 Reference Manual
A
A
A
B
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2. Remove the plug cover and cable gland.
Keep the fixing screw and screw seal safe.
A. Fixing screw and screw seal
3. Pull the cable through the cable gland.
Cable diameter: 0.24 to 0.31 in. (6 to 8 mm)
A. PG9 cable gland provided
4. Connect the cable wires.
Table 4-3 and Table 4-4 show the wiring connections for each electronics option.
5. Ensure proper grounding.
6. Re-fit the plug cover and tighten the cable gland.
a) The plug cover can be re-fitted in any one of four positions.
A. Fork alignment indicator
B. Optional plug positions
Rosemount 2110 Level Switch 35
OK
OK
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March 2022 00809-0100-4029
b) Ensure the cable gland is pointing downwards or sideways.
c) Secure the plug cover with the plug screw and washer, and tighten cable
gland.
d) If possible, arrange the wiring with a drip loop.
7. Connect the power supply when ready to apply power.
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5 Operation
5.1 LED indication status
Table 5-1 shows the different operation statuses and how they are indicated by the LED.
Table 5-1: LED Indications
LED flash rate Switch status
Continuous Output state is on.
1 every second Output state is off.
1 every 2 seconds Uncalibrated.
1 every 4 seconds Load fault; load current too high; load short
circuit.
2 times / second Indication of successful calibration.
3 times / second Internal PCB fault.
Off Problem (e.g. supply).
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6 Service and troubleshooting
6.1 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 39
S
N
A B
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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.
6.2 Magnetic test point
A magnetic test point is marked on the side of the housing to allow a functional test of the
Rosemount 2110 in the overall system. By touching a magnet to the target, the output
from the level switch will change state while the magnet is present.
Figure 6-1: Magnetic Test-point Function
A. Normal condition
B. Test condition
6.3 Visual inspection
40 Reference Manual
Visually examine the level switch and do not use if it is damaged. Check:
• The connector and seals are correctly fitted, and that the connector fixing screw and
gland are tight.
OK
OK
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00809-0100-4029 March 2022
• The LED flash rate is once every second or continually on.
Figure 6-2: Visual Inspection
Related information
LED indication status
6.4 Maintenance
Figure 6-3: Maintenance
Note
Only use a soft type brush for cleaning.
6.5 Troubleshooting
6.5.1 Does not switch
Symptom or indication
LED is not lit, no power.
Recommended actions
1. Check the power supply.
2. Check the load on direct load switching electronics model.
Symptom or indication
LED is flashing three times per second.
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Recommended actions
Contact Emerson to report an internal PCB fault is being indicated.
Symptom or indication
LED is flashing once every two seconds.
Recommended actions
Contact Emerson to report an uncalibrated device is being indicated.
Symptom or indication
LED is flashing once every four seconds.
Recommended actions
Check the electrical installation for a load fault (current is too high or a short-circuit).
Symptom or indication
Visual inspection found fork damage.
6.5.2
Recommended actions
Contact Emerson to report the damage and discuss how to get a replacement.
Symptom or indication
Visual inspection found thick encrustation on the forks.
Recommended actions
Carefully clean the fork.
Symptom or indication
There is always a five second delay after changing the mode or delay.
Recommended actions
This is a normal function when making any changes to the settings.
Related information
LED indication for operating modes
Incorrect switching
Symptom or indication
Dry = On, Wet = On is set incorrectly.
Recommended actions
Check wiring connections.
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6.5.3 Faulty switching
Symptom or indication
Excessive electrical noise.
Recommended actions
Suppress the cause of the interference.
6.6 Spare parts
See the Rosemount 2110 Product Data Sheet for the latest information about spare parts.
6.7 Service support
To expedite the return process outside of the United States, contact the nearest Emerson
representative.
Within the United States, call the Emerson Instrument and Valve Response Center using
the 1-800-654-RSMT (7768) toll-free number. This center, available 24 hours a day, will
assist you with any needed information or materials.
The center will ask for product model and serial numbers, and will provide a Return
Material Authorization (RMA) number. The center will also ask for the process material to
which the product was last exposed.
CAUTION
Individuals who handle products exposed to a hazardous substance can avoid injury if they
are informed of and understand the hazard. Returned products must include a copy of the
required Safety Data Sheet (SDS) for each substance.
Emerson Instrument and Valve Response Center representatives will explain the additional
information and procedures necessary to return goods exposed to hazardous substances.
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44 Reference Manual
Reference Manual Specifications and reference data
00809-0100-4029 March 2022
A Specifications and reference data
A.1 General
A.1.1 Measuring technology
Vibrating fork
A.1.2 Applications
Point level detection in liquid process mediums, including coating liquids, aerated liquids,
and slurries. Suitable for horizontal and vertical installation.
A.2 Physical specifications
A.2.1 Material selection
Emerson provides a variety of Rosemount products with various product options and
configurations including materials of construction that can be expected to perform well in
a wide range of applications. The Rosemount product information presented is intended
as a guide for the purchaser to make an appropriate selection for the application. It is the
purchaser’s sole responsibility to make a careful analysis of all process parameters (such as
all chemical components, temperature, pressure, flow rate, abrasives, contaminants,
etc.), when specifying product, materials, options, and components for the particular
application. Emerson is not in a position to evaluate or guarantee the compatibility of the
process fluid or other process parameters with the product, options, configuration or
materials of construction selected.
A.2.2
Transmissible Spongiform Encephalopathy (TSE)
declaration
This declaration is applicable to the 2-in. (51 mm) Tri Clamp connection option when
ordered with Surface Finish option codes 3, 4, 7 and 8.
Emerson certifies no process wetted components used in this product contain substances
of animal origin. Materials used in the production or processing of wetted components for
this product meet the requirements stated in EMA/410/01 Rev. 3 and ISO 22442-1:2015.
Wetted components in this product are considered free of TSE.
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A.2.3 Electronics housing
Housing/enclosure materials
• Body: 304 stainless steel with polyester label
• LED window: Flame retardant Polyamide (Pa12) UL94 V2
• Plug: Polyamide glass reinforced
• Plug seals: Nitrile butadiene rubber
Ingress protection
IP66/67 to EN60529
A.2.4
Process wetted connections
Connections
• ¾-in. BSPT (R) or NPT threaded process connections
• 1-in. BSPT (R) or BSPP (G) threaded process connections
• Hygienic 2-in. (51 mm) Tri Clamp fitting option
Materials
316L stainless steel (1.4404)
Gasket for 1 in. BSPP (G1) is non-asbestos BS7531 Grade X carbon fiber with rubber binder.
A.3 Performance specifications
A.3.1 Hysteresis (water)
0.1 in. (2.5 mm)
A.3.2
Switching point (water)
0.5 in. (13 mm) from fork tip if mounted vertically.
0.5 in. (13 mm) from the fork edge if mounted horizontally.
The switching point varies with different liquid densities.
A.3.3
46 Reference Manual
Liquid density requirements
Minimum liquid density is 37.5 lb/ft3 (600 kg/m3).
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A.3.4 Liquid viscosity range
0.2 to 10000 cP (centiPoise)
A.3.5 Solids content and coating
The maximum recommended diameter of solid particles in the liquid is 0.2 in. (5 mm).
Avoid bridging of forks (fork-to-fork).
A.3.6 Switching delay
1 second delay for dry-to-wet or wet-to-dry switching
A.4 Electrical specifications
A.4.1 Switching mode
A.4.2
A.4.3
A.4.4
A.4.5
User selectable (Dry=on or Wet=on) by selecting plug wiring
Protections
Polarity insensitive – Direct Load electronics only, over-current protection, short-circuit
protection, load-missing protection, and surge protection (to IEC61326)
Cable connection
Via 4-way plug provided (DIN43650)
Maximum conductor size is 15AWG
4-position orientation (90° / 180° / 270° / 360°)
Terminal connection (wire diameter)
Maximum 0.06 in.2 (1.5 mm2)
Cable gland
PG9 provided. Cable diameter: 0.24 to 0.31 in. (6 to 8 mm)
Rosemount 2110 Level Switch 47
1450 (100)
1160 (80)
32 (0)
-3.62 (-0.25)
-40
(-40)
122
(50)
302
(150)
32
(0)
A
B
176 (80)
122 (50)
32 (0)
-40 (-40)
32
(0)
-40
(-40)
140
(60)
302
(150)
A
B
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A.5 Environmental specifications
A.5.1 Maximum operating pressures
Figure A-1: Process Pressure
A. Process pressure, psig (barg)
B. Process temperature, °F (°C)
A.5.2
The final rating depends on the process connection.
Threaded connection
See Figure A-1.
Hygienic connection
435 psig (30 barg)
Maximum and minimum operating temperatures
See Figure A-2 for the maximum and minimum operating temperatures.
Figure A-2: Temperature
A. Ambient Temperature, °F (°C)
B. Process Temperature, °F (°C)
48 Reference Manual
1.97
(50)
Ø1.5 (Ø38)
Ø1.5 (Ø38)
Ø1.5 (Ø38)
7.91
(201)
9.41
(238)
D
A
C
B
D
D
3.07
(78)
2.36
(60)
F
F
F
E
E
E
1.73
(44)
1.73
(44)
4.57
(116)
3.86
(98)
7.4
(188)
1.73
(44)
2.72
(69)
1.97
(50)
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A.6 Dimensional drawings
Figure A-3: Threaded Process Connections
A. BSPP thread
B. BSPP thread (semi extended)
C. BSPT/NPT thread
D. 1.61 (41) A/F hexagon with fork orientation groove
E. 0.5 (13) switching point when mounted vertically
F. 0.5 (13) switching point when mounted horizontally
Dimensions are in inches (millimeters).
Rosemount 2110 Level Switch 49
Ø1.5 (Ø38)
7.40
(188)
Ø1.65
(Ø42)
A, B
2.72
(69)
2.52
(64)
C
D
1.73
(44)
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Figure A-4: Tri Clamp Process Connections
A. 2-in. (51 cm) Tri Clamp, hygienically certified (surface finish codes 3, 4, 7, and 8)
B. 2-in. (51 cm) Tri Clamp, not hygienically certified (surface finish codes 1 and 2)
C. 0.5 (13) switching point when mounted vertically
D. 0.5 (13) switching point when mounted horizontally
Dimensions are in inches (millimeters).
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Rosemount 2110 Level Switch 51
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Rev. DA
2022
For more information:
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2022 Emerson. All rights reserved.
Emerson.com
Emerson Terms and Conditions of Sale are available upon
request. The Emerson logo is a trademark and service mark of
Emerson Electric Co. Rosemount is a mark of one of the
Emerson family of companies. All other marks are the property
of their respective owners.
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