Infinite L-com SRWQ100-pH104-8701 User Manual
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Infinite L-com SRWQ100-pH104-8701 User Manual

Ph sensor (water quality analysis)
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pH SENSOR (WATER QUALITY ANALYSIS)
User Manual for SRWQ100-pH104-8701
Thank you for choosing L-com product. To ensure safe, accurate performance and product
longevity, please take a moment to familiarize yourself with this manual before powering the
device. Please keep it handy for future reference. In case of any questions regarding the
installation or use of product, please call us at 800.341.5266.
Reach out to us at customerservice@l-com.com and visit our website at www.l-com.com
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Signal Line

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Summary of Contents for Infinite L-com SRWQ100-pH104-8701

  • Page 1 pH SENSOR (WATER QUALITY ANALYSIS) User Manual for SRWQ100-pH104-8701 Signal Line Thank you for choosing L-com product. To ensure safe, accurate performance and product longevity, please take a moment to familiarize yourself with this manual before powering the device. Please keep it handy for future reference. In case of any questions regarding the installation or use of product, please call us at 800.341.5266.

  • Page 2: Technical Data

    Technical Data pH Range 14 pH Resolution 0.01 pH Accuracy ±0.01 pH pH Balance 7.00 ± 0.25 Temperature Range 60.0 ˚C Resolution 0.1 ˚C Accuracy ±0.3 ˚C Temperature Compensation Automatic Slope ≥96% Output RS485, 4 20 mA Power Supply 30 VDC (Recommend 12V) Pressure Range Shell Material PPS, ABS...

  • Page 3: Electrode Activation

    Electrode Outlet Electrode Activation  The electrode should be activated in 3 M KCL solution.  Dry electrode must be activated before use. Electrode Calibration  The electrode has been calibrated before shipment, user can directly use it.  It is recommended to use the two-point method for calibration, usually with 6.86pH or 7.00 buffer solution to calibrate the zero point.

  • Page 4: Electrode Installation

    Put the electrode in pH 6.86 or 7.00 buffer solution and wait until the value is stable, calibrate the first point . Then take the electrode out of the buffer solution, rinse and dry it with a paper towel. Put the electrode in pH 4.01 or 9.18 buffer solution and wait until the value is stable, calibrate the second point .Then take the electrode out of the buffer solution rinse and dry it with a paper towel.
  • Page 5 During Immersion Installation  During installation procedure, there will be frequent dirt on electrode, clean it regularly.  Measuring value is not stable.  Different insertion depths affects the measured value.  The position of the electrode must be above the sediment. Electrode Communication Default Communication Instructions: ...
  • Page 6 Read Floating Point Number Host Computer Transmission Format: Func- Register Start Qty. Of CRC16 Address tion Address Registers Code High High High Byte Byte Byte Byte Byte Byte Eg: Read 0x01 0x03 0x00 0x01 0x00 0x02 0xCB 0x95 Measured Value Eg: Read 0x01 0x03...
  • Page 7 Write Floating Point Number Host Computer Transmission Format: Func- Register Qty. Of Register Data in CRC16 tion Start Registers Hexadecimal Floating Code Address Byte Point Number High High High Byte Byte Byte Byte Byte Byte 0x01 0x10 0x00 0x12 0x00 0x02 0x04 0x2A 0x63 Write Value...

  • Page 8: Calibration Instructions

    Calibration Instructions Before Calibration:  Write the value of zero calibration (i.e., the value of the first point) and the value of slope calibration (i.e., the value of the second point) to the electrode before calibration.  If the zero calibration value is 6.86pH, write the data 0x01to register 0x36. ...
  • Page 9 Hosting Data Read/ Name Length Description Type Write Number Upper limit of measure- Floating Read/ Upper limit of measured value 0X 00 0A ment Point Write (20mA corresponding value) Lower limit of Floating Read/ Lower limit of measurement value 0X 00 DC Point Write (4mA corresponding value)
  • Page 10 Common Instruction Examples Function Send command Return command Remarks Read The 2C814091 change 01 03 04 2C 81 40 01 03 00 01 00 02 95 CB order is 40912C81 and its measured 91 52 E7 floating point is 4.53 value Read The 723741DB change...

  • Page 11: Maintenance And Storage

    Function Send command Return command Remarks Write ORP 01 10 00 30 00 02 04 00 01 10 00 30 00 02 41 Write ORP standard liquid calibration value 86mV 00 42 AC C0 66 value Read The CCCD3E4C change 01 03 04 CC CD 3E 01 03 00 34 00 02 85 C5 order to 3E4CCCD and its...

  • Page 12: Modbus Troubleshooting

    Troubleshooting  If the measurement is not accurate, its mostly because the pH electrode has changed. So it is necessary to check whether the pH electrode is in good condition or not. If the bubble is damaged, replace the bubble. ...

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