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SUTO S421 Instruction And Operation Manual

Thermal mass flow sensor
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Instruction and operation manual
S421
Thermal mass flow sensor

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Summary of Contents for SUTO S421

  • Page 1 English Instruction and operation manual S421 Thermal mass flow sensor...
  • Page 2 The device is designed exclusively for the described application. SUTO offers no guarantee for the suitability for any other purpose. SUTO is also not liable for consequential damage resulting from the delivery, capability or use of this device.

  • Page 3: Table Of Contents

    11.1 Starting process..............26 11.2 Configuration using the display..........27 12 Service App S4C-FS..............28 13 Calibration................29 14 Maintenance................29 15 Disposal or waste..............29 16 Warranty.................30 17 Appendix A Analogue output............31 18 Appendix B Modbus communication example........32 19 Appendix C LRC and CRC calculation...........34 S421...

  • Page 4: Safety Instructions

    • Consider all regulations for electrical installations. • The system must be disconnected from any power supply during maintenance. • Any electrical work on system is only allowed by authorized qualified personal. S421...
  • Page 5 • Always observe the direction of the flow when installing the sensor. The direction is indicated on the housing. • Do not exceed the maximum operation temperature at the sensors tip. • Avoid condensation on the sensor element as this will affect accuracy enormously. S421...
  • Page 6 • Please make sure that storage temperature of the sensor is between -10 ... +50°C. • Avoid direct UV and solar radiation during storage. • For the storage the humidity must be <90%, no condensation. S421...

  • Page 7: Rf Exposure Information And Statement

    Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter. S421...

  • Page 8: Application

    . Other units can be set by the optional display or the service kit. The S421 flow sensor is not developed to be used in explosive areas. For the use in explosive areas please contact the manufacturer. The S421 flow sensor is mainly used in compressed air systems in industrial environment.

  • Page 9: 5Technical Data

    Protection class IP65 Dimensions See dimensional drawing on the next page Display (optional) 2.4” colour graphics display with keypad Tube diameter DN15 ... DN80 Process connection: G1/2” (ISO 228/1) Weight 0.6 kg (Instrument only, not including the measuring section) S421...

  • Page 10: Electrical Data

    Repeatability ± 0.25% of reading Specified accuracy is valid only within the minimum and maxmim flow rates that are indicated in section 4.5. 5.4 Volumetric flow ranges Inch S421 (m³/h) ½" DN15 0.5 ... 90 ¾" DN20 0.9 ... 170 1"...

  • Page 11: Dimensional Drawing

    1/2”/(DN15) 197.4 186.7 R 1/2” S421-3/4” 3/4”/(DN20) 200.2 186.7 R 3/4” S421-1” 1”/(DN25) 203.6 186.7 R 1” S421-1 1/4” 1 1/4”/ 207.9 186.7 R 1 1/4” (DN32) S421-1 1/2” 1 1/2”/ 210.9 186.7 R 1 1/2” (DN40) S421-2” 2”/(DN50) 216.9 186.7...
  • Page 12 S421-1/2” 1/2”/ 234.2 186.7 4xØ14 (DN15) S421-3/4” 3/4”/ 239.2 186.7 4xØ14 (DN20) S421-1” 1”/ 244.2 186.7 4xØ14 (DN25) S421-1 1/4” 1 1/4”/ 256.7 186.7 4xØ18 (DN32) S421-1 1/2” 1 1/2”/ 261.7 186.7 4xØ18 (DN40) S421-2” 2”/ 269.2 186.7 4xØ18 (DN50) S421-2 1/2”...
  • Page 13 4xØ15.7 (DN15) S421-3/4” 3/4”/ 245.4 186.7 117.3 82.5 4xØ19 (DN20) S421-1” 1”/ 248.7 186.7 123.9 88.9 4xØ19 (DN25) S421-1 1/4” 1 1/4”/ 253.4 186.7 133.3 98.5 4xØ19 (DN32) S421-1 1/2” 1 1/2”/ 264.4 186.7 155.4 114.3 4xØ22.3 (DN40) S421-2” 2”/ 269.3...

  • Page 14: Installation Considerations

    • The sensor is for indoor use only! At an outdoor installation, the sensor must be protected from solar radiation and rain. • It is strongly recommend not to install S421 permanently in wet environment as it exists usually right after a compressor outlet.

  • Page 15: Inlet And Outlet Sections

    Note: If there is any combination of the below, the longest straight inlet section must be maintained. The S421 sensor comes with its own measuring section and a straight inlet section, nevertheless additional straight inlet sections must be added to measuring sections to fulfill the minimum inlet requirements.
  • Page 16 S421...
  • Page 17 DN20 DN25 DN32 DN40 DN50 DN65 DN80 1100 1500 1800 2400 3200 3800 LA (mm) 8. Filter or similar (unknown objects) Section size DN15 DN20 DN25 DN32 DN40 DN50 DN65 DN80 LA (mm) 1100 1500 1800 2400 3200 3800 S421...

  • Page 18: Sensor Installation

    A1321 ... A1328 (Flange, EN-1092-1) A1341 ... A1348 (Flange, ANSI 16.5) The S421 is always shipped with mounted measurement section. Please make sure that the sensor is installed correctly to the flow direction in the tube. For this observe the flow direction indicated on the housing, it must match the flow direction of the compressed air or gas.

  • Page 19: Removal Of The Flow Sensor

    • The re-installation of the measurement device is simple as the sensor unit fits into the pipe section only in one position. • Please make sure that the o- ring is inserted. • Close the terminal nut tightly to mount the sensor correctly. S421...

  • Page 20: Electrical Connection

    Connector Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Modbus (P/N: A1411) 4 ... 20mA plus pulse (P/N: A1410) 4 ... 20mA Plus pulse, compatible to S 400 (P/N: A1413) Wire colour brown white blue black grey S421...
  • Page 21 Negative 4 ... 20 mA signal Pulse output Isolated pulse output Flow direction input Modbus data + Modbus data - M-Bus data Not applicable ATTENTION! Do not screw the M12 plug using force. Otherwise, it may damage the connecting pins. S421...

  • Page 22: Sensor Signal Outputs

    The sensor sends out one pulse per consumption unit. This pulse output can be connected to an external pulse counter to count the total consumption. The number of m per second is summed up and indicated after one second. Pulse length depends on flow rate. S421...
  • Page 23 10 Sensor signal outputs If the flow rate is too high, the S421 cannot output the pulses with default settings (one pulse per consumption unit). In this case, the pulse can be set by our service software or a connected display to 1 pulse per 10 consumption units or 1 pulse per 100 consumption units.

  • Page 24: Pulse Connection Diagram

    10.2.1 Pulse Connection Diagram Variant 1: Variant 2: S421...

  • Page 25: Modbus Output

    4-Byte Temperature FLOAT 4-Byte FLOAT 4-Byte Reverse flow Remark • All numbers are in the little-endian format. • Function code: 03. • Different units have different precisions. • The measurement values are always available in the programmed physical units. S421...

  • Page 26: Sensor Display (Option)

    Finally, the display enters the standard mode, showing the online values as shown below. Home page: • Status bar • Moving bar to indicate flow value • Measurement values S421...

  • Page 27: Configuration Using The Display

    2. Use the “Up” and “Down” key on the keyboard to choose the setting which should be changed. 3. Use these two buttons to select a desired entry box or adjust the values. 4. Press the “Enter” button to confirm the changes. S421...

  • Page 28: Service App S4C-Fs

    12 Service App S4C-FS To change any setting on the S421, please download the service app from the Google Play. This app runs on any Android system with BlueTooth supported. To change settings, the app needs to scan the QR code on the calibration certificate at first.

  • Page 29: Calibration

    The sensor, the accessories and its packings must be disposed according to your local statutory requirements. The dispose can also be carried by the manufacturer of the product, for this please contact the manufacturer. S421...

  • Page 30: Warranty

    16 Warranty SUTO provides a warranty for this product of 24 months covering the material and workmanship under the stated operating conditions from the date of delivery. Please report any findings immediately and within the warranty time. If faults occur during the warranty time, SUTO will...

  • Page 31: Appendix A Analogue Output

    DN 40 41.9 0.797 414.3 243.9 1132.7 666.7 89.0 52.4 DN 50 53.1 0.812 591.9 348.4 1618.2 952.4 127.1 74.8 DN 65 68.9 0.825 887.9 522.6 2427.3 1428.6 190.6 112.2 DN 80 80.9 0.830 1479.8 870.9 4045.5 2381.1 317.7 187.0 S421...

  • Page 32: Appendix B Modbus Communication Example

    Coil address Hi 1 byte Coil address Hi 1 byte Coil address Lo 1 byte Coil address Lo 1 byte Data Hi 1 byte Data Hi 1 byte Data Lo 1 byte Data L 1 byte 2 bytes 2 bytes S421...
  • Page 33 1 byte Slave address 1 byte Function code 1 byte Function code 1 byte 2 bytes Byte count 1 byte Slave ID 2 bytes Device run 2 bytes indicator Product code 2 bytes Product name 20 bytes 2 bytes S421...

  • Page 34: Appendix C Lrc And Crc Calculation

    The function takes two arguments: unsigned char *auchMsg; /* A pointer to the message buffer containing binary data */ /* to be used for generating the LRC, unsigned short usDataLen; /* The quantity of bytes in the message buffer. S421...
  • Page 35 8-bit byte will have been processed. 6. Repeat steps 2 through 5 for the next 8-bit byte of the message. Continue doing this until all bytes have been processed. 7. The final content of the CRC register is the CRC value. S421...
  • Page 36 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, S421...
  • Page 37 /* will index into CRC lookup table */ while(usDataLen—) /* pass through message buffer */ uIndex = uchCRCHi ^ *puchMsg++ ; /* calculate the CRC */ uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ; uchCRCLo = auchCRCLo[uIndex] ; return (unsigned short int)((uchCRCHi << 8) | uchCRCLo); S421...
  • Page 38 S421...
  • Page 39 S421...
  • Page 40 SUTO iTEC GmbH SUTO iTEC (ASIA) Co., Ltd. Werkstr. 2 Room 10, 6/F, Block B, Cambridge Plaza 79426 Buggingen 188 San Wan Road, Sheung Shui, N.T. Germany Hong Kong Tel: +49 (0) 7631 936889-0 Tel: +852 2328 9782 Fax: +49 (0) 7631 936889-19...

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