ページ1に含まれる内容の要旨
Instruction & maintenance leaflet
IP2046IM, Rev. AA
November 2006
MSP400RH
Mobrey
MSP400RH Series
Level Transmitter
www.mobrey.com
IP2046/IM
1
Nov 2006
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CONTENTS Page 1. Introduction 3 2. The MSP400RH ultrasonic level transmitter 3 2.1 Type numbering system 3 2.2 Pressure Equipment Directive 4 2.3 Specifications 4 3. Installation 6 3.1 Location of the MSP400RH transmitter 6 3.1.1 General considerations 6 3.1.2 Liquid surface conditions 7 3.1.3 In-tank / well effects 8 3.1.4 Open Channel Flow installations 8 3.2 Mounting the transmitter above the liquid surface 10 3.3 Wiring 11 3.4 Additional components in the 2 wire loop 12 4. Commissioning / Pr
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1.0 Introduction The MSP400 ultrasonic level transmitter is designed to be mounted above a liquid and will measure the distance to the liquid surface. When programmed with details of the vessel, sump or open channel, the MSP400 will compute level, contents or flow and give a 4-20mA signal proportional to the chosen variable. 2 relays are provided for control functions. Programming is achieved using integral push buttons or by remote communication using HART protocol. MSP400 is a two wire 24V dc
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2.2 Pressure Equipment Directive The MSP400RH transmitter does not fall within the PED definition as enclosing a pressurised fluid, so is therefore outside the scope of the Directive. Accordingly, the Declaration of Conformity does not list the Pressure Equipment Directive. 2.3 Specifications Materials of construction: Transducer material PVDF Body & cover Material Glass filled nylon Cable gland Nylon with Nitrile cable seal Cover seal Silicone rubber Cover screws 316 Stainless Steel Transducer
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-40 / +158°F Ø 144 (5.7") -40 / +70°C IP66 / IP67 Ambient 2 x M20 conduit connections 1 x cable gland 1 x blanking plug 135 (5.3") 60mm A/F (2.4") 65 MSP400RH-B28 : 2" BSPT (2.6") MSP400RH-N28 : 2" NPT MIN : 0.45m (18”) -30 / +70°C -22 / +158°F MAX : 11.0m (433”) -0,25 / +3,0bar -4 / +44psi Wetside b.rEF IP2046/IM 5 Nov 2006
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3.0 Installation Important safety notice : The MSP400 is designed for safe area use only, and must not be installed in a hazardous area, even if the power is supplied through a barrier device. General a. Installation must be carried out by suitably trained personnel in accordance with the applicable code of practice. 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
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Max 3° (1.3"/ft) i.e. D Min = 0.45m (18”) 0,11m/m D Max = 11m (433”) C = 0.3m (12”) min to 0.88m (36”) C D • If the transmitter is mounted in an enclosed tank, avoid mounting the transmitter in the centre of the tank roof as this could act as a parabolic reflector and create unwanted echoes. Avoid applications where heavy condensation could form on the transducer face. • If the transmitter is mounted in a stand-off or nozzle, it is always preferable that the transmitter face be at least 5mm
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3.1.3 In-tank effects • Stirrers or agitators can cause a vortex. Always try to mount the transmitter off-centre of any vortex to maximise the return echo. As stirrer blades become uncovered they will create echoes as they pass through the ultrasonic beam. The transmitter can be tuned to ignore these false echoes on site. • In non-linear tanks with rounded or conical bottoms, always mount the transmitter off-centre. In some cases, it may be desirable to install a perforated reflector plate on th
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Transmitter front face Flow Channel invert Primary device (eg. flume, weir) invert In addition to the above, when setting the bottom reference on a ‘V’ notch weir it is important that the true invert of the weir is taken and not the meniscus liquid level, which may be 3 to 4mm (1/8”) above the true invert. Transmitter bottom reference Meniscus True invert � The liquid surface at the point of measurement must have a stable, smooth surface and uniform approach velocity. It must not be affected by
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3.2 Mounting the transmitter above the liquid surface. A 2” thread is provided to mount the transmitter. The user should check the thread form, which will be either 2” BSPT (MSP400RH-B28) or 2” NPT (MSP400RH-N28). The thread form is clearly marked on the hexagon of the transducer body. Note : The MSP400 is designed to be mounted in a non-metallic fitting or flange. The use of metallic fittings or flanges is not recommended. To help installation, a bracket kit is available from Mobrey. This c
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3.3 Wiring The transmitter is supplied with cable gland suitable for cable sizes 4-8mm diameter. Terminal 1 : +24V dc 2 : 0v dc 3 : RL1 (SPST) 4 : RL1 (SPST) 5 : RL2 (SPST) 6 : RL2 (SPST) 7 : MSP-RTP temperature probe (if used) 8 : MSP-RTP temperature probe (if used) Earth Screen : Connect to a standard earth in the control room. Max 3000m (9845ft) Earth screen in control room only Twisted pair, screened 2 Min 0,22mm (25 SWG / 24 AWG) Ø 4 - 8mm 2 Max 1,5mm (17 SWG / 15 AWG) (0.15 - 0
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3.3.3 Relays The MSP400RH transmitter has 2 integral relays which may be used for control purposes. These relays are light duty and should be used as signal relays only, with control functions being performed by external control relays. Relay 2 is defaulted as a ‘fault’ relay, normally energised, but may be reconfigured on site as a set point relay if required. 3.4 Additional components in the two wire loop. 3.4.1 Lightning / surge protection and other loop devices It is allowable to fit loop
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4.0 Commissioning, programming and operation The MSP400 operates from a menu of parameters, each held in a specific memory location within the instrument. The memory locations may be pictured as a matrix, and the user navigates to each parameter to programme the instrument using ↓ and → steps. Refer now to the Main Menu structure shown in Appendix A The MSP400 leaves the factory pre-programmed with a value in each parameter location such that , when the power is first applied, the instrument wi
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4.2 Power up On power up, the MSP400 will take a few seconds to initialise. The display will run through a set-up routine, first illuminating all display characters then showing the software revision number. Once checks are complete, the display will show the Primary Variable (PV) determined based upon the factory default values in the memory. On a new instrument aimed at a good target, this will be what the MSP400 calculates as a level reading based upon the default value for the bottom referen
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4.4 Setting up for the chosen application - the Main Menu. Refer now to the main menu structure chart in Appendix A. It is important to note that MSP400 programming is most easily accomplished by first selecting the duty the transmitter is to perform. Once a duty is selected (see section 4.4.1), a “mini-wizard” programming assistant is invoked and the user is thereafter only asked for information relevant to the duty chosen. As the user is guided through the menu, data input allows the mini-wiza
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4.4.2 Selecting the units of measurement Screen display: unitS Factory default setting: MSP400RH-B28 m MSP400RH-N28 ft i) Note that the factory default units of measurement are dictated by the model type, which may be Imperial (ft) or Metric (m). The user can reconfigure a Metric unit to be an Imperial or vice-versa by changing the base units (b.unit) of the MSP400 - refer to section 4.7.11 ii) Note that changing the base units will cause the MSP400 to re-start with factory default values in all
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4.4.3 Setting the correct bottom reference Screen display: b.rEF Factory default value: MSP400RH-B28 11 MSP400RH-N28 36 The MSP400 leaves the factory with the bottom reference pre-programmed to the maximum range of the instrument, either 11m or 36ft. 20/4 ullage b.rEF 4/20 liquid level To change the bottom reference: a) Press the green button ↓ to display the current “b.rEF” menu entry screen. b) Press the blue button → to enter the “b.rEF” menu and to display the current bottom reference in use
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4.4.4 Selecting the correct Profile algorithm. Screen display: ProF Factory default value: Linear This selection is offered only if the user has chosen a duty of Flow or Contents, or is shown when manually navigating the main menu - ignore if duty chosen is Level or Distance. The MSP400 is pre-programmed with a selection of popular profiles which are mathematical formulae to convert a linear level reading to a flow or volumetric PV. Once converted, the 4-20mA and the display of the unit will ope
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Note: The complete range of options is displayed, regardless of the duty selected earlier. e) Once the desired profile is shown (flashing) on the display, press the blue button → to select this option. It will now stop flashing. f) If the chosen profile is incorrect, the edit sequence for the profile selection can be re-started by pressing the blue button → again. If the profile is correct, press the red button ↵ to save the profile to memory and automatically scroll on to the next main menu opt
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If the profile chosen is any other contents profile, press the red button ↵ to save the profile to memory and automatically scroll on to the next main menu option “Cont @ max”, Refer to Section 4.4.9. 4.4.5 Power factor for the chosen flow law. Screen display: P.FACt Factory default value: 1.000 This selection is offered only if the user has chosen a duty of Flow which requires the manual entry of a power factor in a formula of the type Flow Q = kh* (where * = the power factor) or is shown when
