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Summary of Contents for Microsensor MPM426W Series
- Page 1 MPM426WSeries Operation Manual V1.0...
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Page 3: Specifications
Thank you very much for selecting Micro Sensor’s product. MPM426W series Level Transmitter is a precise instrument, please take some time to read this operation manual very carefully before using. 1. Introduction MPM426W series (such MPM426WPC, MPM426WPF) submersible diffusion silicone level transmitters with the fully welded structure that are specially developed for the petroleum and petrochemical industry. - Page 4 2.1 Basic performance Range: Measured range in mH O: 0~2mH O..200mH Measured range in Bar: 0~0.2bar..350bar Pressure type: Gauge pressure-G; Absolute pressure-A; Sealed gauge pressure -S. Accuracy (based on standard and test reference conditions, including linearity, hysteresis, repeatability)： ±1%FS (0~2mH O≤range<3.5mH O,0~0.2bar≤range<...
- Page 5 Table 1 Pressure type √ × × （0，3.5mH O） Measured √ √ × Range in mH20 [3.5mH O,200mH √ × × (0, 35kPa) Measured √ √ × [35kPa,35bar] Range in bar × √ √ (35bar, 350bar] 2.2 Output parameters Table 2 Output Signal Output form Supply Voltage...
- Page 6 Current Output Type Parameters: Load capacity: ≤ (U-12)/0.02 (Ω). Voltage Output Type Parameters: Load capacity: ≥10K. RS485 Output Type Parameters: Baud rate: 1200, 2400, 4800, 9600 optional. Load capacity: RS485 BUS can cascade up to 99 transmitters. 2.3 intrinsic safety parameters Intrinsically Safe Explosion-proof Markings: Ⅱ1G Ex ia ⅡC T4 Ga ATEX:...
- Page 7 Voltage Output Circuit 200mA 1.44uH 0.428μF 0.56W (5~10V DC Power Supply) Voltage Output Circuit 100mA 1.44uH 0.318μF 0.2W (3.2~5V DC Power Supply) Digital 25.4 90mA Output Circuit 1.44uH 13.2μF 0.56W V DC (RS485) 3. Outline Construction and Installation 3.1 The outline drawing is shown in Figure 1: Unit: mm Stainless Steel/POM End Cap（LD1/LD2）：...
- Page 8 NPT1/4 Male Thread（C6）： Figure 1 3.2 Installation 3.2.1 Please be sure before Installation: a) The measuring pressure is in the measurement range. b) The measuring medium is compatible with construction material. The measuring medium would not jam the pressure-leading hole. 3.2.2 Installation method Generally, the transmitter should be installed perpendicular to the horizontal direction.
- Page 9 and steel needle, and it is also not allowed to press the diaphragm with hands, so as not to damage the diaphragm or cause the diaphragm to deform. 3.2.2.1 Installation in still water: a) The installation method in the pool is shown in Figure 2. In order to prevent the impact of the pump from shaking and damaging the transmitter, the transmitter should be placed away from the liquid inlet and outlet.
- Page 10 3.2.2.2 Installation in moving water: a) Static water devices must be installed in moving water (such as river courses, reservoir areas, etc.), and the sensing surface must be parallel to the direction of water flow. To insert steel pipes in the water channel, the steel pipe wall is required to be slightly thicker, and a number of small holes are punched in the pipe wall at different heights to dampen water waves and eliminate the influence of...
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Page 11: Electrical Connection
Air Pocket Damper Figure 6 4. Electrical Connection Table 4 Wire Color 2-wire(current) 3-wire(voltage) 4-wire(RS485) White Null +OUT RS485B Black OV/+OUT Yellow/Green Null Null RS485A 4.1 Typical electrical connection a) 2-wire:... - Page 12 Figure 7 b) 3-wire: DC current P/U Transmitter Inpu 0/1～5V Figure 8 4.2 Installation Precautions There is a vented tube in the dedicated cable of the transmitter, which is used to connect the back pressure chamber of the gauge pressure sensor with the atmosphere.
- Page 13 Pay attention to the housing jacket and rubber bushing of transmitter cable. 5.2 Shipment Enclosed The transmitter should be enclosed when out of factory： MPM426W Series Level Transmitter Cable (assembled with transmitter) Based on order Production Manual Production Qualification Certificate 7.3 Storage...
- Page 14 the output signal after 30 minutes of warm-up is more stable and reliable. 6.2 Maintenance Please pay attention to the following points for daily maintenance: a) Frequently check whether the electrical connection is reliable. b) Do not poke the pressure hole with a metal wire or other hard objects to poke the diaphragm.
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