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7.2

Adjusting 4–20mA Span

Users may adjust the output scale using 4–20mA Span to change the dissolved oxygen ppm value corre-
sponding to the 20 mA output via

uPyxis®

. For the

uPyxis®

Mobile App, press

4-20mA Span

found on the

Calibration and Reading Screen

, shown in Figure 15. For the

uPyxis®

Desktop App, click

4-20mA Span

found on the

Calibration Screen

, shown in Figure 16.

Figure 15.

Figure 16.

7.3

Communication using Modbus RTU

The ST-773 sensor is configured as a Modbus slave device. In addition to the dissolved oxygen ppm value,
many operational parameters, including warning and error messages, are available via a Modbus RTU con-
nection. Contact Pyxis Lab Customer Service (

[email protected]

) for more information.

ST-773 User Manual

[email protected]

| +1 (866) 203-8397

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Содержание 53709

Страница 1: ......

Страница 2: ...T 773 Dissolved Oxygen Sensor User Manual August 11 2021 Rev 1 0 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 ...

Страница 3: ...1 Download uPyxis Mobile App 11 5 2 Connecting to uPyxis Mobile App 12 5 3 Calibration Screen and Reading 13 5 4 Diagnosis Screen 15 5 5 Device Info Screen 15 6 Setup and Calibration with uPyxis Desktop App 16 6 1 Install uPyxis Desktop App 16 6 2 Connecting to uPyxis Desktop App 17 6 3 Information Screen 18 6 4 Calibration Screen 19 6 5 Diagnosis Screen 21 7 Outputs 21 7 1 4 20mA Output Setup 21 ...

Страница 4: ...delivery All service interventions are to be reviewed and authorized as correct and complete at the completion of the service by a customer representative or des ignate Pyxis warrants these services for 30 days after the authorization and will correct any qualifying deficiency in labor provided that the labor service deficiency is exactly related to the originating event No other remedy other than...

Страница 5: ... is well suited for aggressive industrial application use The ST 773 may be utilized in a submersed fixed floating application or inline with the Pyxis submersion assembly and inline thread tee accessory options The ST 773 comes with a 10 meter bulkhead cable as well as 1 5 meter flying lead cable each with 7Pin quick adapters The sensor output offers both 4 20mA and RS 485 Modbus communication wh...

Страница 6: ...ong distance transmission with higher stability accuracy Wireless Calibration Diagnostics and Trend via uPyxis App when used with MA WB Adapter The sensor can be Slope calibrated with air or air saturated water Zero point calibration with 5 Sodium Sulfite solution or Nitrogen gas Suitable for dissolved oxygen monitoring of Activated Sludge Aerated Basin Wastewater Sewage Processing Chemical Proces...

Страница 7: ... inch Weight 188 g 0 41 lbs cable excluded Working Pressure 75 psi Wet Material CPVC and Polycarbonate Cables Provided 1 x 4 9ft 1 5m Flying Lead Cable 7Pin Female Adapter 1 x 30ft 15m Bulkhead Cable 7Pin Male Adapter Interconnecting Extension Cables Purchased Separately Calibration Slope calibration Air or Air Saturated Water Zero calibration 5 Sodium Sulfite or Nitrogen Gas DO Membrane Cap Life ...

Страница 8: ...submersed or inline installations Please note submersion or inline adapters are purchased separately Please see optional accessories for details One ST 773 Dissolved Oxygen Probe w 30ft 10m Bulkhead Cable Male Adapter 7Pin One DCC 6 DO Membrane Cap for ST 773 One MA 1100 1 5 Meter 4 9 ft Cable Female Adapter Flying Lead 7Pin One MA WB Bluetooth Adapter for 7Pin Sensors One MA NEB Bluetooth USB Ada...

Страница 9: ...in Pyxis Sensors MA WB MA 150 1 Floating Submersion Adapter Kit 53705 MA 120 B Fixed Submersion Adapter Kit 50783 ST 773 Threaded Adapter for Inline Installation 1inch NPT 50700 A04 ST 001 and Collar Tee Assembly for Non Threaded Inline Installation 3 4 inch NPT 53726 DCC 6 Dissolved Oxygen Membrane Cap Replacement 53723 MA C50 50 Extension Cable w 7Pin Adapters 50705 MA C100 100 Extension Cable w...

Страница 10: ... A 3 4 to 1 inch NPT bushing is required for installation The ST 773 dissolved oxygen sensor needs to be installed as shown in Figure 2 For installation users only need to purchase the MA 150 1 from Pyxis Lab and may obtain water tight conduit and cable seal adapter from their supplier of choice For sensor replacement and maintenance users only need to pull the MA 150 1 and DO sensor from fixing b...

Страница 11: ... for installation The ST 773 dissolved oxygen sensor needs to be installed as shown in Figure 3 For installation users only need to purchase the MA 120 B from Pyxis Lab and may obtain water tight conduit and cable seal adapter from their supplier of choice For sensor replacement and maintenance users only need to pull the MA 120 B and DO sensor from fixing bracket vertically upwards Figure 3 ST 77...

Страница 12: ...ertical flow format from bottom up to reduce the impact of air bubbles Install the probe collar on the sensor and then install the sensor into the ST 001 tee assembly and ensure the DCC 6 membrane cap is in the direction of water flow as shown in Figure 4 Figure 4 ST 773 in a pipeline installation using optional ST 001 Tee Assembly Kit P N 53726 or 1 inch Thread Adapter Kit 50700 A04 ST 773 User M...

Страница 13: ...and the negative 4 20mA ter minal on the ST 773 sensor are internally connected Follow the wiring table below to connect the ST 773 sensor to a controller Table 3 Wire Color Designation Red 24V Black 24V Power ground Green 4 20mA White 4 20mA Blue RS 485 A Yellow RS 485 B Silver GNDD Internally connected to the power ground 4 5 Connecting via Bluetooth A Bluetooth adapter P N MA WB can be used to ...

Страница 14: ...tion with uPyxis Mobile App 5 1 Download uPyxis Mobile App Download uPyxis Mobile App from Apple App Store or Google Play Figure 6 uPyxis Mobile App installation ST 773 User Manual service pyxis lab com 1 866 203 8397 11 ...

Страница 15: ...g steps 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 773 and its Serial Number SN will be displayed Figure 7 4 Press on the ST 773 sensor image Figure 7 ST 773 User Manual service pyxis lab com 1 866 203 8397 12 ...

Страница 16: ... cloth taking special care not to damage the membrane Figure 8 5 3 1 Zero Calibration 1 Place the sensor in Nitrogen Gas or 5 Sodium Sulfite solution anaerobic water 2 Let the ST 773 sensor stand for a minimum of 15 minutes Observe the values being displayed on the Calibration screen 3 Once the displayed oxygen and temperature values are stable press Zero Calibration to perform a zero calibration ...

Страница 17: ...e local real time atmospheric pressure value in mbar If a value is not entered the sensor will default to 101 1 mbar 5 Enter the humidity value If you are using air for calibration you will need to enter the real time current humidity value If you are using air saturated water for calibration you will need to enter a humidity value of 1 6 If the air slope calibration was successful the interface w...

Страница 18: ...t the ST 773 sensor in currently measuring then press Cleanliness and Selflife Check If the sensor is clean a Clean message will be shown If the sensor is severely fouled a Please replace the DO membrane cap message will be shown In this case follow the procedure in the Methods to Cleaning the ST 773Sensor section of this manual Figure 9 5 5 Device Info Screen From the Device Info screen You can n...

Страница 19: ...rk 4 5 if not previously installed on the PC the USB driver for the USB Bluetooth adapter MA NEB the USB RS485 adapter MA 485 and the main uPyxis Desktop application Double click the uPyxis Setup exe file to install Figure 10 uPyxis Desktop App installation Click Install to start the installation process Follow the screen instructions to complete the USB driver and uPyxis installation ST 773 User ...

Страница 20: ... uPyxis Desktop App 3 On uPyxis Desktop App click Device Connect via USB Bluetooth Figure 11 4 If the connection is successful the ST 773 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 Figure 11 ST 773 User Manual servic...

Страница 21: ... corner of the window and the uPyxis 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 Apply Settings to save Figure 12 ST 773 User Manual service pyxis lab com 1 866 203 8397 18 ...

Страница 22: ...membrane Figure 13 6 4 1 Zero Calibration 1 Place the sensor in Nitrogen Gas or 5 Sodium Sulfite solution anaerobic water 2 Let the ST 773 sensor stand for a minimum of 15 minutes Observe the values being displayed on the Calibration screen 3 Once the displayed oxygen and temperature values are stable click Zero Calibration to perform a zero calibration 4 If the calibration is successful the inter...

Страница 23: ...e local real time atmospheric pressure value in mbar If a value is not entered the sensor will default to 101 1 mbar 5 Enter the humidity value If you are using air for calibration you will need to enter the real time current humidity value If you are using air saturated water for calibration you will need to enter a humidity value of 1 6 If the air slope calibration was successful the interface w...

Страница 24: ...he Diagnosis Condition which defines the fluid type that the ST 773 sensor is currently measuring then click Cleanliness and Selflife Check If the sensor is clean a Clean message will be shown If the sensor is fouled a Please replace the DO membrane cap message will be shown In this case follow the procedure in the Methods to Cleaning the ST 773 section of this manual Figure 14 7 Outputs 7 1 4 20m...

Страница 25: ...is Desktop App click 4 20mA Span found on the Calibration Screen shown in Figure 16 Figure 15 Figure 16 7 3 Communication using Modbus RTU The ST 773 sensor is configured as a Modbus slave device In addition to the dissolved oxygen ppm value many operational parameters including warning and error messages are available via a Modbus RTU con nection Contact Pyxis Lab Customer Service service pyxis l...

Страница 26: ...eral months The need to clean the ST 773 sensor can be determined by the Clean liness and Selflife Check using either the uPyxis Mobile App see the Mobile Diagnosis Screen section or the uPyxis Desktop App see the Desktop Diagnosis Screen section If the Cleanliness and Selflife Check continues to return a Please replace the DO membrane cap use an Allen wrench to remove the protective cover unscrew...

Страница 27: ...hes blue and red light after the inspection screw the DO membrane cap back onto the sensor 9 Troubleshooting If the ST 773 sensor output signal is not stable and fluctuates significantly make an additional ground con nection connect the clear GNDD wire to a conductor that contacts the sample water electrically such as a metal pipe adjacent to the ST 773 tee 10 Contact Us Pyxis Lab Inc 1729 Majesti...

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