Subscribe to Our Youtube Channel
Related Manuals for Pyxis ST-772
Summary of Contents for Pyxis ST-772
- Page 1 ST-772 Dissolved Oxygen Probe Operation Manual April. 10, 2020 Rev. A 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 2 Device Warranty Term The Pyxis warranty term for the ST-772 probe is thirteen (13) months from original shipment from Pyxis. In no event shall the standard limited warranty coverage extend beyond thirteen (13) months from original shipment date.
-
Page 3: Table Of Contents
Table of Contents Introducing the Pyxis ST-772 Probe .....................4 Features of the Pyxis ST-772 Probe ....................4 Specifications ..........................5 Unpacking the Pyxis ST-772 Probe ....................5 Standard Accessories ........................6 Optional Accessories ........................6 Installation ..........................7 Quick 4-20mA Start ........................8 Calibration and Diagnosis......................9... -
Page 4: Introducing The Pyxis St-772 Probe
ST-772 offers an easily replaceable, front loading DO membrane cap that has been independently developed by Pyxis Lab, with a typical service life of up to two years. This unique DO membrane cap design incorporates a black microporous PTFE membrane material designed to provide extreme scratch resistance, extended life span and simple replacement. -
Page 5: Specifications
Remove the instrument and accessories from the shipping container and inspect each item for any damage that may have occurred during shipping. Verify that all items listed on the packing slip are included. If any items are missing or damaged, please contact Pyxis Customer Service at service@pyxis- lab.com... -
Page 6: Standard Accessories
• The full instrument manual is available for download at www.pyxis-lab.com/support.html Figure 1 ST-772 Dissolved Oxygen Probe / DCC-1 Membrane Cap / MA-CR Bluetooth Adapter / MA-NEB USB Adapter 1.5 Optional Accessories The following optional accessories can be ordered at order@pyxis-lab.com... -
Page 7: Installation
MA-150-1 Submersion Adapter Mounting Bracket and the MA-150-3 Floating Submersion Pipe Assembly. The ST-772 dissolved oxygen probe needs to be installed as shown in Figure 2. For installation, users only need to keep the MA-105-1 and MA-105-3 assemblies in place permanently. For probe replacement and maintenance, users only need to pull the MA-150-3 and DO probe from fixing bracket vertically (upwards). -
Page 8: Quick 4-20Ma Start
Figure 3 ST-772 in a submersed fixed installation Pipeline Installation The ST-772 may also be installed in an inline flow application using the Pyxis ST-001 Inline Tee Assembly. The ST-001 offers ¾” FNPT Thread or Socket Weld Adapters with Unions for easy installation and sensor maintenance. -
Page 9: Calibration And Diagnosis
4.1 Calibration and Diagnosis by uPyxis Mobile App Connect and power the ST-772 probe using the MA-CR Pyxis Bluetooth adapter (P/N: MA-CR) as shown in the following connection diagram. The power should be sourced from a 24 VDC power terminal from the receiving controller. -
Page 10: Calibration By Upyxis Mobile App
Pyxis Bluetooth devices. The discovered devices will be listed (Figure Tap the discovered ST-772 probe to connect to the probe. The uPyxis app can identify the probe type if multiple Pyxis probes are discovered in the scan. For legacy generation Pyxis probes, a dialog message window will be displayed to ask the user to tell the app the probe type. - Page 11 "Zero Calibration" to perform zero calibration (Figure 7). If the calibration is successful, the interface will feedback a message "Calibration Succeeded". If the calibration fails, click "Zero Calibration" again. Figure 6 A ST-772 discoveredby Bluetooth scan Figure 7 Calibration page...
-
Page 12: 4-20Ma Span
You cannot INCREASE the upper limit of the sensor. Figure 11 Enter DO ppm In Water concentration to set 4-20mA 4.1.3 Diagnosis Tap Diagnosis in the bottom of the app page to launch the diagnosis page (Figures 11 and 12). Pyxis ST-772 Operation Manual... - Page 13 As shown in Figure 13, If the DCC-1 (DO membrane cap) is in need of replacement, the APP will display "Please replace the DO membrane cap". In this case, please replace the DCC-1 dissolved oxygen membrane cap. If you are in need of a new replacement cap, contact order@pyxis-lab.com for pricing details. Pyxis ST-772 Operation Manual...
-
Page 14: Calibration And Diagnosis By Upyxis Desktop App
. Connect and power the ST-772 probe using the MA-CR Pyxis Bluetooth adapter (P/N: MA-CR) as shown in the following connection diagram. The power should be sourced from a 24 VDC power terminal from the receiving controller. If a controller is not available, please purchase a 24 V power supply that can directly connect to the ST-772 probe with proper cable connectors from Pyxis. - Page 15 (Figure 16) After the connection is established, the ST-772 probe series number and current DO in water reading are displayed on the left of the information page (Figure 17). In this page, a nickname can be assigned to the probe.
-
Page 16: Calibration
4.2.1 Calibration Remove the ST-772 dissolved oxygen probe from the water and wipe it with a damp cloth to remove debris and any biofouling. If there is water on the membrane, dry it with a soft cloth, taking special care not to damage the membrane. - Page 17 "Zero Calibration" to perform zero calibration (Figure 20). If the calibration is successful, the interface will feedback a message "Calibration Succeeded" as in Figure 21. If the calibration fails, click "Zero Calibration" again. Figure 19 Calibration Page Pyxis ST-772 Operation Manual...
- Page 18 Figure 20 Air Calibration Figure 21 Zero Calibration Pyxis ST-772 Operation Manual...
-
Page 19: 4-20Ma Span
Span to change the DO in water value corresponding to the 20 mg/L output (Figure 22). *NOTE* The 4- 20mA Span feature allows users to REDUCE the upper 20mA output scale only. You cannot INCREASE the upper limit of the sensor. Pyxis ST-772 Operation Manual... -
Page 20: Diagnosis
As shown in Figure 26, If the DCC-1 (DO membrane cap) is in need of replacement, the APP will display "Please replace the DO membrane cap" . In this case, please replace the DCC-1 dissolved oxygen membrane cap. If you are in need of a new replacement cap, contact order@pyxis-lab.com for pricing details. Pyxis ST-772 Operation Manual... - Page 21 Figure 24 Select Diagnosis Condition Figure 25 Operation Tips Pyxis ST-772 Operation Manual...
-
Page 22: Calibration Through The Controller
Figure 26 Cleanliness check result and raw data2 4.3 Calibration Through the Controller It is recommended that ST-772 probe be calibrated by using uPyxis APP for Mobile or Desktop devices, as demonstrated in the sections above. Alternatively, a single point calibration can be carried on the receiving controller by adjusting the mA-to-DO ratio. -
Page 23: Probe Cleaning And Maintenance
Solution Kit (Figure 28) may also be used to removal of heavy deposits, especially inorganics. Remove the ST-772 probe and the DO membrane cap from the water in use, wipe it with a damp cloth to remove debris and growing organisms, and use a cotton swab dipped in water to clean up the dirt on the membrane surface. -
Page 24: Other Common Troubleshooting Issues
6.2 Other Common Troubleshooting Issues If the ST-772 probe output signal is not stable and fluctuates significantly, make an additional solution ground connection – connect the clear solution ground wire to a conductor that contacts the sample water electrically such as a brass pipe adjacent to the ST-772 tee.
Need help?
Do you have a question about the ST-772 and is the answer not in the manual?
Questions and answers