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Summary of Contents for Microsensor MPM489W
- Page 1 MPM489W Operation Manual...
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Page 2: Table Of Contents
Contents 1 Introduction ..................1 2 Specifications ................. 2 3 Construction and Outline Dimension ..........3 4 Operation Principle ................. 4 5 Unpacking, Storage and Shipment Enclosed ........6 6 Installation ..................7 7 Operation, Maintenance and Fault Diagnosis........ 15 8 Responsibility ................ -
Page 3: Introduction
IP68, and the transmitter is available for long-term submersible operation. MPM489W level transmitter has advantages of small size, light weight and long-term stability; it can be applied to measure and control in field of petroleum, chemi-industry, medicine, metallurgy, power station, mine, city water supply, drainage and hydrology survey, etc. -
Page 4: Specifications
2 Specifications Range: 0mH O~1mH O…200mH Over pressure: ≤2 times FS Pressure Type: gauge, absolute Accuracy: ≤±0.25%FS ≤±0.5%FS ≤±1%FS Note: The precision of products is related to the range of measurement, and the precision of products in different range is different. Stability Error: Range >10mH O ≤... -
Page 5: Construction And Outline Dimension
Load(Ω): RL≤ (U-11)/0.02（2-wire）;≥10kΩ（3-wire） Intrinsic safe version mark:ExiaIICT6Ga; ExiaIICT4Ga(ATEX) EC-Type Examination Certificate Number: Presafe 17 ATEX 11284X Intrinsically safe coefficient: Ui=28VDC Ii=93mA Pi=0.65W Ci=0.044uF Li=0mH ATEX: Ui=28VDC Ii=115mADC Li=0mH Ci=0.055uF Pi=0.66W (2-wire) Ui=26VDC Ii=140mADC Li=0mH Ci=0.055uF Pi=0.66W (3-wire) Ui=15VDC Ii=200mADC Li=0mH Ci=0.0451uF Pi=0.75W (3-wire) Protection Rating :IP68 3 Construction and Outline Dimension 3.1 Construction... - Page 6 300 meters. Connection Box： Please specify a connection box is to be connected to MPM489W when ordering. Indicator: only for transmitter with 2-wire, 4mA~20mADC output and connection box Ye, indicator could be provided according to the options.
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Page 7: Operation Principle
4 Operation Principle The measuring element of transmitter is a sensor, which transfers the pressure into electric signal by semiconductor silicon material’s piezo-resistive effect. The measured pressure acts on stainless steel diaphragm, and then be transferred onto sensitive chip by silicon oil which is filled between the stainless steel diaphragm and sensitive chip (see Fig. -
Page 8: Unpacking, Storage And Shipment Enclosed
measure level or the liquid depth. The level measurement principle of transmitter to see Fig. 5: Connection Box Control center Fig. 5 P = γ. h……………….① P is the liquid static pressure at the measuring point; γ is the liquid specific gravity; h is the depth from the measuring point to the liquid surface, or level. -
Page 9: Installation
MPM489W level transmitter Polyethylene Special Cable（connected with transmitter） the ordered length Connection Box （connected with cable） due to the order Indicator （ in connection box Ye） due to the order Product Operation Manual Product Quality Certificate 5.3 Storage The transmitter should be stored in dry and ventilative room with ambient temperature -20℃~85℃，relative humidity no more than 85% and the air... - Page 10 In the flowing water, the acted surface should be parallel with the water flowing direction. 6.2.1 Installation in the Static Water The installation method in the static water see Fig. 6. To prevent shaking or destroying the transmitter when pumping, the transmitter should be put away from the liquid resource.
- Page 11 Electnical Connection Box Control Room F astener Fig. 7 6.2.2 Installation in Flowing Water（e.g. river channel, reservoir area, etc.） The water-calming equipments are required. Method one: Insert a steel tube in the water channel (see Fig. 8). The steel tube wall should be thicker, and several holes should be made at different heights on the tube to damp waves and clear the water pressure influence.
- Page 12 E l e c t n i ca l C o n n e c t io n B o x Fig. 8 E L e c t n i c a l C o n n e c t i o n Bo x Fig.
- Page 13 This method can not only clear water flowing pressure and wave influence, but also filter the sand and mud. Air Pocket Damper Fig. 10 6.3 Electrical Connection Wires could be connected based on terminal definitions on production quality certificate. The specific method is to see following steps. 6.3.1 Electrical connection method Electrical connection method of transmitter with Two-wire 4mA~20mA DC output, to see Fig.
- Page 14 P/U Transmitter DC current Input +OUT 0/1V ～ Fig. 12 The electric definitions of cable are as follow： Cable 2-wire 3-wire Black +OUT +OUT White Null 6.3.2 The Electrical Connection Method of Explosion Proof Version Transmitter Intrinsically safe version explosion proof transmitters conform Standard GB3836.1 and GB3836.4, used for explosive condition.
- Page 15 safe version transmitter and connection box should be put in dangerous area, besides the transmitter connected to the earth safely. Dangerous Area Safe Area Safe Power 24VDC Barrier Load Input ExiaIICT6Ga [Exia]IIC Fig. 13 Transmitter ex-proof parameter: Safe barrier ex-proof parameter: Ui=28VDC Ii=93/115mADC(ATEX)mADC Uo=28VDC Li=0mH Ci=0.0440/055μF(ATEX)
- Page 16 Ui=15VDC Ii=200mADC Uo=15VDC Io=200mADC Li=0mH Ci=0.0451μF Pi=0.75W Po=0.75W Fig. 14 The maximum diffused capacities of cable between the transmitter and safe barrier is Cp = Co-Ci，and diffused inductance is Lp = Lo-Li。 6.3.3 The electrical connection method of transmitter with junction box.
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Page 17: Operation, Maintenance And Fault Diagnosis
The transmitter could work at once as soon as it is connected with excitation, but the output signal could be more reliable after 30 minutes. 7.2 Maintenance MPM489W level transmitter does not need to be maintained regularly, but please pay attention to items as follow for better operating effect and reliability. -
Page 18: Responsibility
7.3 Fault Diagnosis MPM489W level transmitter is integrative full-sealed construction without movable parts inside, owning advantage of long-term stability and reliability. If some failure occur, such as no output, output too big or too small and unreliable, please turn off the excitation firstly, then check the installation and wire connection conform with the operation manual or not, the excitation is correct or not and the reference tube is unobstructed or not.
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