Related Manuals for Pyxis ST-723
Summary of Contents for Pyxis ST-723
- Page 1 ST-723 Inline Conductivity Sensor (for High Temperature Applications) User Manual April 7, 2024 Rev. 1.04 Pyxis Lab, Inc.
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Page 2: Table Of Contents
5.2.2 4-20mA Span ......................... 14 5.2.3 Diagnosis Screen ........................15 6. Communication using Modbus RTU ....................16 7. Sensor Maintenance and Precaution ..................16 7.1 Methods to Cleaning the ST-723 Sensor ..................16 8. Troubleshooting ........................17 9. Contact Us ..........................17... - Page 3 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).
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Page 4: Table Of Contents
RS-485 Modbus output for a broad array of ST-723 Conductivity Sensor installations that desire to connect the smart sensor directly to receiving controller, PLC or DCS network. The ST-723 sensor has built-in RTD for the automatic compensation of sample temperature. Features The ST-723 includes the following features: •... -
Page 5: Specifications
8-Pin Bulkhead 4.9 ft (1.5 m) / 8-Pin Flying Lead 4.9 ft (1.5 m) Cables Provided (Extension Cables Sold Separately) *NOTE* With Pyxis’s continuous improvement policy, these specifications are subject to change without notice. 3 Unpacking ST-723 Remove the instrument and find the standard accessories from the shipping container as listed below. Inspect each item for any damage that may have occurred during shipping. -
Page 6: Standard Accessories
• One MA-4.9CR Cable (1.5 m/4.9 ft Extension Cable for 8Pin Pyxis Sensors) • User Manual is also available for download at https://pyxis-lab.com/support/ Optional Accessories The following optional accessories can be purchased via your Regional Sales contact or Pyxis Customer Service at order@pyxis-lab.com. Table 2. Optional Accessories Accessory Name... -
Page 7: Piping Installation Guidelines
The following 3 installation methods should be avoided. These installation methods can easily produce air bubbles and air accumulation leading to unstable measurement. As shown in Figure 5. Figure 5. Installation methods to be avoided. ST-723 User Manual service@pyxis-lab.com | +1 (866) 203-8397... -
Page 8: Wiring
Wiring The ST-723 sensor provides passive 4-20mA outputs. They should not be connected to a loop powered input. If the power ground terminal and the negative 4–20mA terminal in the controller are internally connected (non-isolated 4–20mA input), it is unnecessary to connect the 4–20mA negative wire (gray) to the 4–20mA negative terminal in the controller. -
Page 9: Calibration And Diagnosis
24VDC power supply or use the Pyxis PowerPACK Series Bluetooth adapters (See Section 3.2 Optional Accessories) MA-CR Bluetooth/USB Adapter Figure 6. Power the ST-723 via Controller with the MA-CR Bluetooth Adapter inserted between Bulkhead & Flying Lead Cables ST-723 User Manual service@pyxis-lab.com... - Page 10 *NOTE* To use uPyxis 2.0® please enable Bluetooth® and location permissions on your mobile device. Tap the discovered ST-723 sensor to connect to the sensor. The uPyxis 2.0 app can identify the sensor type if multiple Pyxis sensors are discovered in the scan.
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Page 11: Conductivity Calibration
Breaker Conductivity Calibration Remove the ST-723 sensor from the pipe tee and use deionized water to clean the sensor. If severely fouled, conduct a cleaning using Pyxis Probe Cleaner (P/N – SER-01) as outlined in Section 7.1. After cleaning, place the sensor into a beaker containing Pyxis 1,000us/cm Conductivity Standard, then tap Calibration in the uPyxis app. -
Page 12: Diagnosis Screen
5.1.3 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 12. ST-723 User Manual service@pyxis-lab.com | +1 (866) 203-8397... -
Page 13: Install Upyxis® Desktop App
MA-CR Bluetooth Adapter – Bottom USB-C Port Figure 13. ST-723 Probe / MA-CR / USB-C Cable connected to uPyxis Desktop. Set the MA-CR to operate in USB Mode by following the steps below. a) Once the MA-CR screen is powered Press until you arrive at (USB to RS485) screen. - Page 14 (Figure 15). If more than one Comm port listed in the selection dropdown, you may try to select each one to see if a connection can be made. Alternatively, you may use the Windows Device Manager to identify the Comm Port that the Pyxis USB adapter is using. Figure 14. Connection Options Figure 15.
- Page 15 After the connection is established, the ST-723 probe series number and current conductivity readings are displayed on the left of the information page (Figure 16). In this page, you can set the information description for Device Name, Product Name, and Modbus Address, then click Apply Settings to save.
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Page 16: Conductivity Calibration
Breaker Conductivity Calibration Remove the ST-723 sensor from the pipe tee and use deionized water to clean the sensor. If severely fouled, conduct a cleaning using Pyxis Probe Cleaner (P/N – SER-01) as outlined in Section 7.1. After cleaning, place the sensor into a beaker containing Pyxis 1,000us/cm Conductivity Standard, then tap Calibration in the uPyxis app. -
Page 17: Diagnosis Screen
Figure 19. 5.2.3 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 20. ST-723 User Manual service@pyxis-lab.com | +1 (866) 203-8397... -
Page 18: Communication Using Modbus Rtu
Figure 21. Inline Probe Cleaning Solution Kit To clean the ST-723 sensor, soak the lower half of the sensor in 100 ml of in-line sensor cleaning solution for 10 minutes or longer (the cleaning solution should completely submerge the front electrode). After soaking, gently scrub the electrode surface with a cotton swab. -
Page 19: Troubleshooting
8. Troubleshooting If the ST-723 sensor output signal is not stable and fluctuates significantly, make an additional ground connection — connect the green (earth ground) wire to a conductor that contacts the sample water electrically such as a metal pipe adjacent to the ST-723 tee.
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