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Summary of Contents for Microsensor MDM490
- Page 1 MDM490 Operation Manual V1.0...
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Page 2: Specifications
Thanks for your using products from MICROSENSOR. MDM490 precise piezo-resistive transmitter is one of precise instruments. We suggest you to read this manual carefully before use. 1 Introduction MDM490 precise piezo-resistive transmitter is a differential pressure measurement device with compact size. The transmitter using a differential pressure sensor and special amplified circuit, through stability and reliability experiments, can provide standard 2-wire 4mA～20mADC and 3-wire 0/1V～... - Page 3 Static pressure：≤20MPa Accuracy:±0.5%FS (Non-linearity, Repeatability and Hysteresis) Response: ≤1ms Insulation: 100MΩ， 50VDC Housing Protection: IP65 3 Outline Construction and Installation 3.1 Construction and Mounting Dimension(Unit:mm)： Fig.1 Fig.2 3.2 Installation 3.2.1 Attentions before installation: a) The operating pressure of measuring medium is no more than the line pressure of transmitter;...
- Page 4 to prevent one-side overpressure destroying the transmitter. Or the customer can buy the leading tube and tri-valve from our factory. Tri-valve operation method can see appendix “Tri-valve Operation Menu”. 3.2.2 Installation Method a) The recommended method is to see Fig. 3. Fig.
- Page 5 8) Ban to pulling the cable violently, and to prevent the diaphragm damaging don’t poke the diaphragm with metal still objects. MDM490 differential pressure transmitter allows the customers to adjust the zero and Span output signals while you own a standard pressure controller.
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Page 6: Electric Connection
MDM490 differential pressure transmitter has no movable mechanical parts, the housing is welded， almost no need to repair. If the transmitter is fail to work, the customer should contact with factory checking the reasons, and return to factory for repair. - Page 7 4.2 Electrical connection method is indicated as follow 4.2.1 4mA~20mADC(2-wire) Ttansimtter DC Supply Black Load Input Fig. 5 4.2.2 0/1V~5VDC(3-wire) Transmitter DC Supply Black White Input Fig. 6 4.3 Plug connection Operation Method： a) If the plug has been connected with transmitter, loose the central bolt on the top of plug with little screwdriver and pull out the plug from transmitter.
- Page 8 will be disconnected with housing. c) To connect the cable, put the cable through the cable jack and connect the wires with terminals on the plug core correctly (the connection terminals signed with clear numbers). Please choose Φ4.5mm~7mm shield cable and connect the cable reliably to prevent short circuit.
- Page 9 safe Supply △P barrier 24VD Load Fig. 7 ≤35kPa Explosion proof grade Explosion proof grade and and parameter of transmitter： parameter of safety fence ExiaⅡBT6 Ga ExiaⅡC =28VDC I =93mADC =28VDC I =93mADC Li≈0.1mH C ≈0.29μF P =0.65W =0.65W ＞35kPa Explosion proof grade Explosion proof grade and and parameter of transmitter：...
- Page 10 Pay attention to the housing jacket and rubber bushing of transmitter cable. 5.2 Enclosed The transmitter should be enclosed when out of factory： When out-factory, the transmitter should include: MDM490 differential transmitter Electrical connection plug (insert supplied) Cable (cable supplied) 1.5 meter or based on order Product operation menu...
- Page 11 30 minutes. 6.2 Maintenance MDM490 precise piezo-resistive transmitter is the compact measurement device, please pay attention to the following items in the operation: If the pressure-leading hole is jammed or the diaphragm is dirty, please clean them with impregnant which is compatible with transmitter construction material.
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