Emerson MSP422 User Manual
Reference Manual
IP2013, Rev BA
February 2012
Mobrey MSP422
Ultrasonic Liquid Level Transmitter
Mobrey MSP422
www.mobrey.com
Reference Manual
NOTICE
Rev BA , Rev BA
February 2012
Mobrey MSP422
Mobrey MSP422 Ultrasonic
Liquid Level Transmitter
Read this manual before working with the product. For personal and system safety, and for
optimum product performance, make sure you thoroughly understand the contents before
installing, using, or maintaining this product.
The products described in this document are NOT designed for nuclear-qualified
applications.
This device complies with part 15 of the FCC rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation.
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Reference Manual
Rev BA , Rev BA
February 2012
Mobrey MSP422
Table of Contents
SECTION 1
Introduction
SECTION 2
Transmitter Overview
SECTION 3
Installation
Safety Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Manual Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Product Recycling/Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Components of the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Safety Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Before You Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Mounting Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Liquid Surface Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
In-tank Effects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Mounting the Transmitter Above the Liquid Surface . . . . . . . . . . . 3-5
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Cabling the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
After Completing the Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Lightning / Surge Protection and Other Loop Devices . . . . . . . . . . 3-8
SECTION 4
Starting up
Safety Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Before Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
MSP422 Menu Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Programming The MSP422. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Display Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
First Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Setting the Bottom Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Setting 4 mA and 20 mA Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Setting the Output Damping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Selecting the Action on Alarm Condition . . . . . . . . . . . . . . . . . . . . 4-8
Setting 4 mA and 20 mA Levels Using Ranging. . . . . . . . . . . . . . . 4-9
Learn About Echoes From False Targets. . . . . . . . . . . . . . . . . . . 4-10
Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Power Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
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Mobrey MSP422
Reference Manual
IP2013, Rev BA
February 2012
SECTION 5
Service and
Troubleshooting
APPENDIX A
Reference Data
APPENDIX B
Product Certifications
Safety Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Diagnostics for The MSP422. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
General Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Temperature and Pressure Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . .A-2
Load Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2
Dimension Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-3
Safety Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1
Manufacturing Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-2
European Union Directive Information. . . . . . . . . . . . . . . . . . . . . . . . .B-2
Non-hazardous Location Certifications . . . . . . . . . . . . . . . . . . . . . . . .B-2
American and Canadian Certifications. . . . . . . . . . . . . . . . . . . . . .B-2
TOC--2
Reference Manual
IP2013, Rev BA
February 2012
Mobrey MSP422
Section 1 Introduction
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2
Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2
SAFETY MESSAGES Procedures and instructions in this manual may require special precautions to
ensure the safety of the personnel performing the operations. Infor mation that
raises potential safety issues is indicated by a warning symbol ( ). Refer to
the safety messages listed at the beginning of each section before performing
an operation preceded by this symbol.
Failure to follow these installation guidelines could result in death or serious
injury.
• Make sure only qualified personnel perform the installation.
• Use the equipment only as specified in this manual. Failure to do so may
impair the protection provided by the equipment.
Explosions could result in death or serious injury.
• The Mobrey MSP422 is only for use in a non-hazardous location
Electrical shock could cause death or serious injury.
• Use extreme caution when making contact with the leads and terminals.
Any substitution of non-recognized parts may jeopardize safety. Rep air, e.g. substitution
of components etc., may also jeopardize safety and is under no circumstances allowed.
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Reference Manual
IP2013, Rev BA
Mobrey MSP422
February 2012
MANUAL OVERVIEW This manual provides installation, configur ation, and maintenance info rmation
for the Mobrey MSP422 ultrasonic level transmitter.
Section 2: Transmitter Overview
Section 3: Installation
Section 4: Starting up
Section 5: Service and Troubleshooting
Appendix A: Reference Data
Appendix B: Product Certifications
CUSTOMER SUPPORT For the latest customer support information, visit www.mobrey.com, and then
click on the quick links Mobrey Service or Product Support.
Individuals who handle products exposed to a hazardous substance can avoid injury if they
are informed of, and understand, the hazard. If the product being returned was exposed to a
hazardous substance as defined by OSHA, a copy of the required Material Safety Data
Sheet (MSDS) for each hazardous substance identified must be included with the returned
goods.
PRODUCT
RECYCLING/DISPOSAL
Recycling of equipment and packaging should be taken into consideration.
The product and packaging should be disposed of in accordance with local
and national legislation.
1-2
Reference Manual
Distance
Level
Bottom Reference
IP2013, Rev BA
February 2012
Mobrey MSP422
Section 2 Transmitter Overview
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 2-1
Components of the Transmitter . . . . . . . . . . . . . . . . . . . . page 2-2
THEORY OF OPERATION The Mobrey MSP422 ultrasonic level transmitter is designed to be mounted
above a liquid and uses ultrasonic pulses to continuously measure the
distance to the liquid surface. The microprocessor-controlled electronics
measures the time delay between the transmitting and the receiving of the
reflected signals to calculate the distance (Figure 2-1).
When programmed with the bottom reference of the application – usually the
bottom of a tank – the MSP422 computes the liquid depth (level) and outputs
a 4–20 mA signal proportional to that level.
An LCD screen inside the enclosure displays the selected measurement.
Programming of the MSP422 is achieved using the integral push-buttons
inside the enclosure and the menu system shown on the LCD screen.
Figure 2-1. Typical Applica tio n
Using a Mobrey MSP422
Transmitter
The MSP422 may be mounted in a non-hazardous areas only.
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Mobrey MSP422
M20
Conduit
Thread
Transmitter Face
2-in. Mounting
Thread
Electronics
Housing
MSP422 FEATURES
Supplied With:
1 x Cable Gland and Dust Cap
Reference Manual
IP2013, Rev BA
February 2012
COMPONENTS OF THE
TRANSMITTER
Figure 2-2. The Mobrey MSP
Series Transmitters
The Mobrey MSP422 has a housing containing advanced electronics for
signal processing, and terminals for connecting the external power supply.
The electronics produces an ultrasonic signal from the transmitter face.
It is a two-wire, loop-powered transmitter; the two wires are used for both
24 Vdc power supply connections and the 4–20 mA an alo g outpu t si gn a l.
A two-core, shielded/screened cable is required (not supplied).
A comprehensive specification for the Mobrey MSP422 is in the section
“Specifications” on page A-1.
2-2
Reference Manual
IP2013, Rev BA
February 2012
Mobrey MSP422
Section 3 Installation
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1
Before Yo u Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 3-2
Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . .page 3-3
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-7
SAFETY MESSAGES Procedures and instructions in this section may require special precautions to
ensure the safety of the personnel performing the operations. Infor mation that
raises potential safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.
Explosions could result in death or serious injury:
• The Mobrey MSP422 is only for use in a non-hazardous location
Failure to follow safe installation and servicing guidelines could result in death or
serious injury:
Make sure only qualified personnel perform the installation.
Use the equipment only as specified in this manual. Failure to do so may impair the
protection provided by the equipment.
Do not perform any service other than those contained in this manual unless you are
qualified.
Process leaks could result in death or serious injury.
Make sure that the transmitter is handled carefully.
High voltage that may be present on leads could cause electrical shock:
Avoid contact with leads and terminals.
Make sure the main power to the Mobrey MSP422 transmitter is off and the lines to any
other external power source are disconnected or not powered while wiring.
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Mobrey MSP422
BEFORE YOU INSTALL The MSP422 is used for level measurement.
The transmitter must be installed in a location where it is protected from
ultraviolet radiation to prevent long term degradation of the plastics used
e.g. shrouded from direct sunlight.
It is important to correctly position the transmitter for reliable ultrasonic level
measurement. For maximum accuracy and stability of the level measurement
reading, the transmitter should always be shrouded from direct sunlight and
radiated heat.
The transmitter may be site-tuned to deal with most application conditions, but
it is recommended that the following guidelines be adopted where relevant.
NOTE:
The Mobrey MSP422 is designed to be mounted in a non-metallic fitting or
flange. The use of metallic fittings/flanges is not recommended.
General Considerations Guidelines:
a) Installation must be carried out by suitably trained personnel in
accordance with the applicable code of practice.
Reference Manual
IP2013, Rev BA
February 2012
b) If the equipment is likely to come into contact with aggressive substances,
it is the responsibility of the user to take suitable precautions that prevent
it from being adversely affected, thus ensuring that the type of protection
is not compromised.
Aggressive Substances are acidic liquids or gases that may attack met als
or solvents that may affect polymeric materials.
Suitable Precautions are regular checks as part of routine inspections, or
establishing, from the material's datasheet, that it is resistant to specific
chemicals.
c) The equipment must only be cleaned with a damp cloth.
d) The equipment is not intended to be repaired by the user and is to be
replaced by an equivalent unit. Repairs should only be carried out by the
manufacturer or approved repairer.
e) The transmitter is Double Insulated, and therefore Protective Earthing is
not required.
f) To maintain protection against the possible spread of fire, the supply to
the equipment must be limited to 3.75 Amps by a fuse or other mean s
g) Note that if the equipment is used in a manner not specified by the
manufacturer, the protection afforded by the equipment may be impaired.
h) The transmitter complies with the European Directive for Electro Magnetic
Compatibility (EMC) Class B. To ensure electro-magnetic compatibility in
any member state, it should not be installed in a reside ntial area.
3-2
NOTE:
It is not advisable to mount the transmitter in close proximity to a source of
electrical noise such as a variable-speed drive, or other high-powered
electrical device.
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