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Pyxis ST-712SS User Manual

Stainless steel ph+orp sensor
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Summary of Contents for Pyxis ST-712SS

  • Page 2 ST-712SS Stainless Steel pH+ORP Sensor User Manual January 14, 2022 Rev. 0.92 Pyxis Lab, Inc. 1729 Majestic Dr. Suite 5 Lafayette, CO 80026 USA www.pyxis-lab.com © 2017 Pyxis Lab, Inc. Pyxis Lab Proprietary and Confidential...

  • Page 3: Table Of Contents

    8 Sensor Maintenance and Precaution 8.1 Methods to Cleaning the ST-712SS Sensor ......16 8.2 Replacing pH+ORP Electrode Head (EH-712) .
  • Page 4 Pyxis Lab, Inc. Standard Limited Warranty Pyxis Lab warrants its products for defects in materials and workmanship. Pyxis Lab will, at its option, repair or replace instrument components that prove to be defective with new or remanufactured components (i.e., equivalent to new).

  • Page 5: Introduction

    (RS-485) and dual analog (4-20mA) signal outputs, designed to simplify field installation, calibration and use of operations. The ST-712SS pH portion of the sensor is offers a flat-bubble sensor design which is optimally suited for increased fouling resistance. The sensor is designed with a large capacity salt bridge and integrated automatic temperature compensation ensuring a highly accurate, long-life sensor with dra- matically reduced field maintenance.

  • Page 6: Specifications

    2 years † Life With Pyxis’s continuous improvement policy, these specifications are subject to change without notice. † Typical life is the sensor at 25 °C temperature under normal use conditions to measure clear water; harsh working conditions or water quality may shorten life.

  • Page 7: Unpacking Instrument

    • One MA-1.5CR — (Flying Lead Cable / Male 8-Pin Adapter and Flying Leads — 4.9ft) • User Manual available online at https://pyxis-lab.com/support/ 3.2 Optional Accessories The following optional accessories can be ordered from Pyxis Customer Service (order@pyxis-lab.com) or Pyxis E-Store at https://pyxis-lab.com/shop/. Table 2. Optional Accessories Accessory Name/Description Part Number...

  • Page 8: Installation

    4.1 Piping The provided ST-001 Tee Assembly can be connected to a pipe system through the 3/4” female ports, either socket or NPT threaded. To properly install the ST-712SS sensor into the ST-001 Tee Assembly, follow the steps below: 1. Insert the provided O-ring into the O-ring groove on the tee.

  • Page 9: Wiring

    Internally connected to the power ground 4.3 Connecting via Bluetooth Connect and power the ST-712SS sensor with the Pyxis Bluetooth adapter (P/N: MA-CR) installed as shown in the following connection diagram. The power should be sourced from a 24 VDC power terminal of a controller.

  • Page 10: Setup And Calibration With Upyxis® Mobile App

    5 Setup and Calibration with uPyxis® Mobile App 5.1 Download uPyxis® Mobile App Download uPyxis® Mobile App from Apple App Store Google Play. Figure 4. uPyxis® Mobile App installation ST-712SS User Manual service@pyxis-lab.com | +1 (866) 203-8397...

  • Page 11: Connecting To Upyxis® Mobile App

    1. Open uPyxis® Mobile App. 2. On uPyxis® Mobile App, pull down to refresh the list of available Pyxis devices. 3. If the connection is successful, the ST-712SS and its Serial Number (SN) will be displayed (Figure 5). 4. Press on the ST-712SS sensor image.

  • Page 12: Calibration Screen And Reading

    5.3 Calibration Screen and Reading The ST-712SS pH/ORP sensor is rigorously calibrated before leaving the Pyxis factory. As such, users should not need to calibrate the sensor for a period of three months up to one year if the sensor is maintained in clean operable condition.

  • Page 13: Diagnosis Screen

    5.4 Diagnosis Screen From the Diagnosis screen, you can check the diagnosis condition. This feature may be used for technical support when communicating with service@pyxis-lab.com. Figure 7. 5.5 Device Info Screen From the Device Info screen. You can name the Device or Product as well as set the Modbus address.

  • Page 14: Setup And Calibration With Upyxis® Desktop App

    Desktop application. Double click the uPyxis.Setup.exe file to install. Figure 9. uPyxis® Desktop App installation Click Install to start the installation process. Follow the screen instructions to complete the USB driver and uPyxis® installation. ST-712SS User Manual service@pyxis-lab.com | +1 (866) 203-8397...

  • Page 15: Connecting To Upyxis® Desktop App

    3. On uPyxis® Desktop App, click Device Connect via USB-Bluetooth (Figure 9). 4. If the connection is successful, the ST-712SS and its Serial Number (SN) will be displayed in the left pane of the uPyxis® window. NOTE After the sensor and Bluetooth is powered up, it may take up to 10 seconds for the adapter to establish the wireless signal for communication.

  • Page 16: Information Screen

    Desktop App will default to the Information screen. On the Information screen you can set the information description for Device Name, Product Name, and Modbus Address, then click to save. Figure 11. ST-712SS User Manual service@pyxis-lab.com | +1 (866) 203-8397...

  • Page 17: Calibration Screen

    6.4 Calibration Screen The ST-712SS pH/ORP sensor is rigorously calibrated before leaving the Pyxis factory. As such, users should not need to calibrate the sensor for a period of three months up to one year if the sensor is maintained in clean operable condition.

  • Page 18: Diagnosis Screen

    – 20 mA = 1500 mV 7.2 Communication using Modbus RTU The ST-712SS sensor is configured as a Modbus slave device. In addition to the pH value and ORP mV value, many operational parameters, including warning and error messages, are available via a Modbus RTU connection.

  • Page 19: Sensor Maintenance And Precaution

    Figure 14. Inline Probe Cleaning Solution Kit To clean the ST-712SS sensor, soak the lower half of the sensor in 100 mL inline sensor cleaning solution for 10–15 minutes. Rinse the ST-712SS sensor with distilled water. If the surface is not entirely clean, continue to soak the ST-712SS sensor for an additional 10–15 m inutes.

  • Page 20: Replacing Ph+Orp Electrode Head (Eh-712)

    2. Make sure there is no water on the sensor. 3. Hold the ST-712SS main body with one hand and use the other hand to twist the stainless-steel locking ring connecting the black electrode counterclockwise, until the front end of the black electrode is completely unscrewed, as shown in Figure 15-2.

  • Page 21: Troubleshooting

    Figure 15. Replacing EH-711 — ORP Electrode Head 9 Troubleshooting If the ST-712SS sensor output signal is not stable and fluctuates significantly, make an additional ground connection — connect the black (shield, solution ground) wire to a conductor that contacts the sample wa- ter electrically such as a metal pipe adjacent to the ST-712SS tee.

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