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Reference Manual
IP2013, Rev BA
February 2012
Mobrey MSP422
Mobrey MSP422
Ultrasonic Liquid Level Transmitter
www.mobrey.com
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Reference Manual Rev BA , Rev BA February 2012 Mobrey MSP422 Mobrey MSP422 Ultrasonic Liquid Level Transmitter NOTICE 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. Operati
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Reference Manual Rev BA , Rev BA February 2012 Mobrey MSP422 Table of Contents SECTION 1 Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Introduction Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Product Recycling/Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 SECTION 5 Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Service and Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Troubleshooting Diagnostics for The MSP422. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 General Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Error
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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
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 MANUAL OVERVIEW This manual provides installation, configuration, and maintenance information 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
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Reference Manual 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
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 COMPONENTS OF THE The Mobrey MSP422 has a housing containing advanced electronics for signal processing, and terminals for connecting the external power supply. TRANSMITTER 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 analog output signal. A two-core, shielded/screened cable is require
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 Section 3 Installation Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1 Before You Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-2 Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-3 Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-7 SAFETY MESSAGES Procedures and instructions in this
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Reference Manual IP2013, Rev BA February 2012 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
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 MECHANICAL INSTALLATION Mounting Guidelines: Considerations a) The transmitter should be mounted above the liquid surface using the 2-inch thread provided, but not closer than 12 in. (0,3 m) to the surface. The transmitter does not detect any liquid surface closer than 12 in. (0,3 m) to the transmitter face. (See "Mounting the Transmitter Above the Liquid Surface" on page 3-5). Optional flanges and bracket kits are available to he
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 Figure 3-1. Min And Max Max. 3° Distances From Tank Wall Use Non-metallic Fitting / Flange 6° Beam Half Angle C C =1.3 in./ft. (11 cm/m) C Min. = 12 in. (0,3 m) Liquid Surface Guidelines: Conditions a) Foaming liquids can reduce the size of the returned echo because foam is a poor ultrasonic reflector. Mount an ultrasonic transmitter over an area of clear liquid, such as near the inlet to a tank or well. In extreme conditions, or w
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 Mounting the Transmitter A 2-in. thread is provided to mount the transmitter. The thread form is either 2-in. BSPT or 2-in. NPT, and is clearly marked on the hexagon of the Above the Liquid Surface transmitter body. 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. To help installation, flange accessories and bracket kits are available fr
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 Figure 3-2. Mounting The Mobrey MSP422 Using A Nozzle/Stand-off Use Non-metallic Fitting / Flange PTFE Tighten To A Torque Of 1.5 lbf.ft (2 Nm) Using The Hexagon. Do Not Use The L Housing To Tighten D NOTE: If the transmitter face does not protrude into the vessel, note the dimensions in Table 3-1 for Figure 3-2, and always ensure that the nozzle/vessel weld is smooth and free from internal weld beads or other projections. Table
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 ELECTRICAL NOTE! The MSP422 is not intrinsically safe certified, and is therefore for use in INSTALLATION non-hazardous (Ordinary Location) installations only. Cabling the Transmitter The Mobrey MSP422 is a two-wire, loop-powered transmitter requiring an external 24 Vdc power supply. There is one M20x1.5 cable entry. A suitable conduit system or cable gland must be used to keep the weather-proof rating. To cable the transmitter: 1.
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 Lightning / Surge If the area is prone to lightning strikes or voltage surges, a suppressor device may be installed between the transmitter and the control unit. Protection and Other Loop Devices If an additional loop-powered device or separately powered device is included in the two-wire loop, the transmitter must receive a minimum voltage of 12 Vdc at 21 mA loop current. (See "Load Limitations" on page A-2). 3-8
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 Section 4 Starting up Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-2 Programming The MSP422 . . . . . . . . . . . . . . . . . . . . . . . . page 4-4 Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-11 Power Failure . . . . . . . . . . . . . . . . . .
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Reference Manual IP2013, Rev BA February 2012 Mobrey MSP422 OVERVIEW The Mobrey MSP422 ultrasonic level transmitter is operated from a menu of parameters, each held in a specific memory location within the transmitter. The memory locations may be pictured as a matrix, and navigated for programming the instrument using and steps. The Integral Display Menu structure is shown in Figure 4-1 on page 4-3. The transmitter is pre-programmed at the factory with a value in each parameter location
