Pyxis ST-730 Series Inline Turbidity Sensor User Manual
- June 6, 2024
- Pyxis
Table of Contents
- Pyxis ST-730 Series Inline Turbidity Sensor User Manual
- Warranty Information
- Standard Limited Warranty
- Warranty Term
- Warranty Service
- Warranty Shipping
- Pyxis Technical Support
- 1 Introduction
- 2 Specifications
- 3 Unpacking Instrument
- 4 Installation
- 4.2 ST-730SS Piping
- 4.3 Wiring
- 4.4 Connecting via Bluetooth
- 5 Setup and Calibration with uPyxis® Mobile App
- 5.2 Connecting to uPyxis® Mobile App
- 5.3 Calibration Screen and Reading
- 5.4 Diagnosis Screen
- 5.5 Device Info Screen
- 6 Setup and Calibration with uPyxis® Desktop App
- 6.2 Connecting to uPyxis® Desktop App
- 6.4 Calibration Screen
- 6.5 Diagnosis Screen
- 7 Outputs
- 7.2 Adjusting 4–20mA Span
- 7.3 Communication using Modbus RTU
- 8 Sensor Maintenance and Precaution
- 8.1 Methods to Cleaning the ST-730 Series Sensor
- 8.2 Storage
- 9 Troubleshooting
- Read More About This Manual & Download PDF:
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
Pyxis ST-730 Series Inline Turbidity Sensor User Manual
Warranty Information
Confidentiality
The information contained in this manual may be confidential and proprietary
and is the property of Pyxis Lab, Inc. Information disclosed herein shall not
be used to manufacture, construct, or otherwise reproduce
the goods described. Information disclosed herein shall not be disclosed to
others or made public in any manner without the express written consent of
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). The warranty set forth is exclusive and no other
warranty, whether written or oral, is expressed or implied.
Warranty Term
The Pyxis warranty term is thirteen (13) months ex-works. In no event shall the standard limited warranty coverage extend beyond thirteen (13) months from original shipment date.
Warranty Service
Damaged or dysfunctional instruments may be returned to Pyxis for repair or
replacement. In some instances, replacement instruments may be available for
short duration loan or lease.
Pyxis warrants that any labor services provided shall conform to the
reasonable standards of technical competency and performance effective at the
time of 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 designate. 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 the provision of
labor services, may be applicable.
Repair components (parts and materials), but not consumables, provided during
a repair, or purchased individually, are warranted for 90 days ex-works for
materials and workmanship. In no event will the incorporation
of a warranted repair component into an instrument extend the whole
instrument’s warranty beyond its original term.
Warranty Shipping
A Repair Authorization (RA) Number must be obtained from Pyxis Technical
Support before any product can be returned to the factory. Pyxis will pay
freight charges to ship replacement or repaired products to the
customer. The customer shall pay freight charges for returning products to
Pyxis. Any product returned to the factory without an RA number will be
returned to the customer. To receive an RMA you can generate a
request on our website at https://pyxis-lab.com/request-tech-support/.
Pyxis Technical Support
Contact Pyxis Technical Support at +1 866-203-8397, service@pyxis-lab.com, or by filling out a request for support at https://pyxis-lab.com/request-tech- support/.
1 Introduction
The Pyxis ST-730 Series sensor a pre-scaled inline sensor that measures
turbidity in water using a white LED as the excitation light source and by
measuring the scattered light at a 90-degree angle with respect to the
excitation beam. The fluidic and optical arrangement of the ST-730 Series
sensor is designed to overcome many shortcomings associated with other inline
turbidimeters. It can be easily inserted into the custommade
tee with a compression fitting port designed to ensure correct vertical
positioning of the ST-730 Series sensor in the fluid stream. The ST-730 Series
sensor custom mounting tee has two ¾ inch female NPT ports
for plumbing into an existing ¾ inch sample water line. The ST-730 Series
sensor can be connected to any device that accepts an isolated or non-isolated
4–20mA input or RS-485 Modbus input. The ST-730 Series
sensor has a short fluidic channel that can be easily cleaned and calibrated
using the MA-WB Bluetooth adapter and uPyxis® Mobile or Desktop App.
2 Specifications
Table 1. ST-730, ST-730B, ST-731, and ST-735 Specifications
Specifications ***| ST-730| ST-730B
ST-731| ST-735**
---|---|---|---
Part Number (P/N)| 53201| 53202 53505|
53204
Turbidity Range| 0–100 NTU| 0–1,000 NTU 0–10 NTU|
0–10,000 NTU
Turbidity
Resolution
| 0.1 NTU| 1 NTU 0.05 NTU| 10 NTU
Turbidity Accuracy| ±2% of reading
Method| Nephelometric, with white LED and IR LED (860 nm) light sources
Calibration| Two-point calibration against standard solution
Outputs| 4–20mA Analog Output, RS-485 Digital Output with Modbus protocol
Installation| Custom tee assembly (P/N: ST-001) with 3/4” FNPT socket &
threaded ports
Cable Length| 5 ft, with IP67 connectors. 30 ft and 60 ft extension cables
available
Power Supply
×
| 22–26 VDC, 1 W
× ×
Dimension (L| Dia)| 6.8 1.44 inch (172.7 36.6 mm)
Weight| 0.37 lbs (170 g)
Material| CPVC
Operational
Temperature
| 40–120 °F (4–49 °C)
Storage
Temperature
| 20–150 °F (-7–66 °C)
Pressure| Up to 100 psi (0.7 MPa)
Enclosure Rating| IP66
Regulation| CE
- With Pyxis’s continuous improvement policy, these specifications are subject to change without notice.
Table 2. ST-730SS Specifications
Specifications ***** | ST-730SS |
---|---|
Part Number (P/N) | 50626 |
Turbidity Range | 0–100 NTU |
Turbidity Resolution | 0.1 NTU |
Turbidity Accuracy | ±2% of reading |
Method | Nephelometric, with white LED and IR LED (860 nm) light sources |
Calibration | Two-point calibration against standard solution |
Outputs | 4–20mA Analog Output, RS-485 Digital Output with Modbus protocol |
Installation | 3/4” FNPT threaded ports |
Cable Length | 5 ft, with IP67 connectors |
Power Supply | 22–26 VDC, 1 W |
Dimension | See Figure 4 |
Weight | 2.5 lbs (1130 g) |
Material | 304 Stainless Steel |
Operational Temperature | 40–120 °F (4–49 °C) |
Storage Temperature | 20–150 °F (-7–66 °C) |
Pressure | Up to 290 psi (2.0 MPa) at 149 °F (65 °C) |
Enclosure Rating | IP66 |
Regulation | CE |
***** With Pyxis’s continuous improvement policy, these specifications are subject to change without notice.
3 Unpacking Instrument
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 accessory items are included. If any item is missing
or damaged, please contact Pyxis Lab Customer Service at service@pyxis-
lab.com.
3.1 Standard Accessories
- Tee Assembly 3/4” NPT (1x Tee, O-ring, and Nut) P/N: ST-001 NOTE ST-001 is not included for ST-730SS
- 7-Pin Female Adapter/Flying Leads Cable (2 ft) P/N: MA-1100
- User Manual available online at https://pyxis-lab.com/support/ ST-
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/.
Figure 1.
4 Installation
4.1 ST-730/730B/731/735 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-730/730B/731/735 sensor into the ST-001 Tee Assembly, follow the steps below:
- Insert the provided O-ring into the O-ring groove on the tee.
- Insert the ST-730/730B/731/735 sensor into the tee.
- Tighten the tee nut onto the tee to form a water-tight, compression seal.
Figure 3. Dimension of the ST-730/730B/731/735 and the ST-001 Tee Assembly (mm)
NOTE It is recommended to install the ST-730 Series sensor tee in the pipe system where sample water flow is vertical.
4.2 ST-730SS Piping
The ST-730SS sensor has 3/4” female NPT threaded ports on the sensor itself
and therefore does not require a custom tee assembly. It is recommended that
two 3/4” NPT to 1/4” tubing adapters are used to connect
the sensor to the sampling system. Sample water entering the sensor must be
cooled down to below 120 °F (49 °C). The sensor can be held by a 1.75-inch
pipe clamp or mounted to a panel with four 1/4-28 bolts.
See Figure 4 for ST-730SS dimensions.
4.3 Wiring
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 (green) to the 4–20mA
negative terminal in the controller. If a separate DC power supply other than
that from the controller is used, make sure that the output from the power
supply is rated for 22–26 VDC @ 65mA.
NOTE* The negative 24V power terminal (power ground) and the negative 4–20mA
terminal
on the ST-730 Series sensor are internally connected. Follow the wiring table
below to connect the ST-730 Series sensor to a controller:
Table 3.
Wire Color | Designation |
---|---|
Red | 24V + |
Black | 24V Power ground |
White | 4–20mA + |
Green ***** | 4–20mA – |
Blue | RS-485 A |
Yellow | RS-485 B |
Clear | Shield, earth ground |
4.4 Connecting via Bluetooth
A Bluetooth adapter (P/N: MA-WB) can be used to connect a ST-730 Series sensor to a smart phone with the uPyxis® Mobile App or a computer with a Bluetooth/USB Adapter (P/N: MA-NEB) and the uPyxis® Desktop App. The power should be sourced from a 24 VDC power terminal of a controller. If a controller is not available, please purchase a Pyxis PowerPack-1 (P/N: MA- BLE-1) or PowerPack-4 (P/N: MA-BLE-4) auxiliary power supply with Bluetooth, or an alternative 24 V power supply that can directly connect to the ST-730 Series sensor with proper cable connectors from Pyxis.
Figure 5. Bluetooth connection to ST-730 Series sensor
5 Setup and Calibration with uPyxis® Mobile App
5.1 Download uPyxis® Mobile App
Download uPyxis® Mobile App from Apple App Store or Google Play.
Figure 7. uPyxis® Mobile App installation
5.2 Connecting to uPyxis® Mobile App
Connect the ST-730 Series sensor to a mobile smart phone according to the following steps:
- Open uPyxis® Mobile App.
- On uPyxis® Mobile App, pull down to refresh the list of available Pyxis devices.
- If the connection is successful, the ST-730 Series and its Serial Number (SN) will be displayed (Figure 8).
- Press on the ST-730 Series sensor image.
Figure 8.
5.3 Calibration Screen and Reading
When connected, the uPyxis® Mobile App will default to the Calibration screen.
From the Calibration screen, you can perform calibrations by pressing on Zero
Calibration, Slope Calibration, and 4-20mA Span.
Follow the screen instructions for each calibration step.
5.4 Diagnosis Screen
From the Diagnosis screen, you can check the diagnosis condition as well as Export & Upload. This feature may be used for technical support when communicating with service@pyxis-lab.com. Figure 10.
5.5 Device Info Screen
From the Device Info screen. You can name the Device or Product.
Figure 11.
6 Setup and Calibration with uPyxis® Desktop App
6.1 Install uPyxis® Desktop App
Download the latest version of uPyxis® Desktop software package from: https
://pyxis-lab.com/upyxis/ this setup package will download and install the
Microsoft.Net Framework 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 12. uPyxis® Desktop App installation
Click Install to start the installation process. Follow the screen instructions to complete the USB driver and uPyxis installation.
6.2 Connecting to uPyxis® Desktop App
Connect the ST-730 Series sensor to a Windows computer using either a Bluetooth/USB adapter (P/N: MANEB) or a USB-RS485 adapter (P/N: MA-485) according to the following steps:
- Plug the Bluetooth/USB adapter or USB-RS485 adapter into a USB port in the computer.
- Launch uPyxis® Desktop App.
- On uPyxis® Desktop App, click Device Connect via USB-Bluetooth or Connect via USB-RS485 (Figure 13).
- If the connection is successful, the
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 13.
6.3 Information Screen
Once connected to the device, a picture of the device will appear on the top
left 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 and Product Name, then click Set to
save.
6.4 Calibration Screen
To calibrate the device, click on Calibration. On the Calibration screen there
are three calibration tabs, Zero
Calibration, Slope Calibration, and 4-20mA Span. The screen also displays the
reading of the device. The reading refresh rate is every 4 seconds. Follow the
screen instructions for each calibration step.
Figure 15.
6.5 Diagnosis Screen
After the device has been calibrated and installation has been completed, to
check diagnosis, click on Diagnosis.
When in the Diagnosis screen you can view the Diagnosis Condition of the
device. This feature may be used for technical support when communicating with
service@pyxis-lab.com.
Figure 16.
7 Outputs
7.1 4–20mA Output Setup
The 4–20mA output of the ST-730 and ST-730SS sensor is scaled as:
-
Turbidity:
– 4 mA = 0 NTU
– 20 mA = 100 NTU
The 4–20mA output of the ST-730B sensor is scaled as: -
Turbidity:
– 4 mA = 0 NTU
– 20 mA = 1,000 NTU -
The 4–20mA output of the ST-731 sensor is scaled as:
-
Turbidity:
– 4 mA = 0 NTU
– 20 mA = 10 NTU
The 4–20mA output of the ST-735 sensor is scaled as: -
Turbidity:
– 4 mA = 0 NTU
– 20 mA = 10,000 NTU
7.2 Adjusting 4–20mA Span
Users may adjust the output scale using 4–20mA Span to change the turbidity
value corresponding 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 17. For the uPyxis® Desktop App, click 4-20mA
Span found on the Calibration Screen, shown in Figure 18.
Figure 18.
7.3 Communication using Modbus RTU
The ST-730 Series sensor is configured as a Modbus slave device. In addition
to the NTU value, many operational parameters, including warning and error
messages, are available via a Modbus RTU connection.
Contact Pyxis Lab Customer Service (service@pyxis-lab.com) for more
information.
8 Sensor Maintenance and Precaution
When used to control product dosing, it is suggested that the automation
system be configured to provide backup to limit potential product overfeeds,
for example by limiting pump size or duration, or by alarming
if the pumping rate exceeds a desired maximum limit.
The ST-730 Series sensor is designed to be easily removed, inspected, and
cleaned if required. It is suggested that the ST-730 Series sensor be checked
for fouling and cleaned on a monthly basis. Heavily contaminated
waters may require more frequent cleanings. Cleaner water sources with less
contamination may not require cleaning for several months.
8.1 Methods to Cleaning the ST-730 Series Sensor
Any equipment in contact with industrial cooling systems is subject to many
potential foulants and contaminants.
Our inline sensor cleaning solutions below have been shown to remove most
common foulants and contaminants. A small, soft bristle brush, Q-Tips cotton
swab, or soft cloth may be used to safely clean the
sensor housing and the quartz optical sensor channel. These components and
more come with a Pyxis Lab Inline Probe Cleaning Solution Kit (P/N: SER-01)
which can be purchased at our online E-Store https://pyxislab. com/product/st-
series-probe-cleaning-kit/
Figure 19. Inline Probe Cleaning Solution Kit
To clean the ST-730 Series sensor, soak the lower half of the sensor in 100 mL
inline sensor cleaning solution for 30 minutes. Rinse the ST-730 Series sensor
with distilled water and then check for the flashing blue light
inside the ST-730 Series sensor quartz tube. If the surface is not entirely
clean, continue to soak the ST-730 Series sensor for an additional 30 minutes.
Use the small, soft bristle brush and Q-Tips cotton swabs as
necessary to remove any remaining contaminants in the ST-730 Series sensor
quartz tube.
8.2 Storage
Avoid long term storage at temperature over 100 °F. In an outdoor installation, properly shield the ST-730 Series sensor from direct sunlight and precipitation.
9 Troubleshooting
If the ST-730 Series sensor output signal is not stable and fluctuates
significantly, make an additional ground connection — connect the clear
(shield, earth ground) wire to a conductor that contacts the sample water
electrically such as a metal pipe adjacent to the ST-730 Series tee. Carry out
routine calibration verification against a qualified turbidity standard. After
properly cleaning the ST-730 Series sensor, carry out the zero point and slope
calibration using the qualified turbidity standard. Pyxis Lab Turbidity
Standards can be purchased at our online E-Store https://pyxis-
lab.com/product/ turbidity-calibration-set-50-100-200-ntu/
Figure 20. Turbidity Standards
10 Contact Us
Pyxis Lab, Inc
1729 Majestic Dr. Suite 5
Lafayette, CO 80026 USA
www.pyxis-lab.com
Phone: +1 866-203-8397
Email: service@pyxis-lab.com
Read More About This Manual & Download PDF:
References
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- pyxis-lab.com/request-tech-support/
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