Pyxis ST-590 Series User manual

ST-590 User Manual [email protected] | [phone]

ST-590 Fluorescent Polymer Inline
Sensor
User Manual
September 15, 2020
Rev. 3.00
Pyxis Lab, Inc.
1729 Majesc Dr. Suite 5
Lafayee, CO 80026 USA
www.pyxis-lab.com
© 2017 Pyxis Lab, Inc.
Pyxis Lab Proprietary and Condenal

Table of Contents
1 Introducon 2
1.1 MainFeatures......................................... 2
2 Specicaons 3
3 Unpacking Instrument 3
3.1 StandardAccessories ..................................... 3
3.2 OponalAccessories ..................................... 4
4 Installaon 5
4.1 ST-590Piping ......................................... 5
4.2 ST-590SSPiping ........................................ 5
4.3 Wiring............................................. 6
4.4 ConnecngviaBluetooth................................... 7
4.5 ConnecngviaUSB ...................................... 7
5 Setup and Calibraon with uPyxis® Mobile App 8
5.1 Download uPyxis® MobileApp................................ 8
5.2 Connecng to uPyxis® MobileApp.............................. 8
5.3 Calibraon Screen and Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.4 DiagnosisScreen ....................................... 10
5.5 DeviceInfoScreen....................................... 11
6 Setup and Calibraon with uPyxis® Desktop App 11
6.1 Install uPyxis® DesktopApp.................................. 11
6.2 Connecng to uPyxis® DesktopApp ............................. 12
6.3 InformaonScreen ...................................... 12
6.4 CalibraonScreen....................................... 13
6.5 DiagnosisScreen ....................................... 13
7 Communicaon using Modbus RTU 14
8 Sensor Maintenance and Precauon 14
8.1 Methods to Cleaning the ST-590 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.2 Storage ............................................ 15
9 Troubleshoong 15
10 Contact Us 15

Warranty Informaon
Condenality
The informaon contained in this manual may be condenal and proprietary and is the property of Pyxis
Lab, Inc. Informaon disclosed herein shall not be used to manufacture, construct, or otherwise reproduce
the goods described. Informaon disclosed herein shall not be disclosed to others or made public in any
manner without the express wrien consent of Pyxis Lab, Inc.
Standard Limited Warranty
Pyxis Lab warrants its products for defects in materials and workmanship. Pyxis Lab will, at its opon, repair
or replace instrument components that prove to be defecve with new or remanufactured components
(i.e., equivalent to new). The warranty set forth is exclusive and no other warranty, whether wrien 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 dysfunconal instruments may be returned to Pyxis for repair or replacement. In some in-
stances, replacement instruments may be available for short duraon loan or lease.
Pyxis warrants that any labor services provided shall conform to the reasonable standards of technical com-
petency and performance eecve at the me of delivery. All service intervenons are to be reviewed and
authorized as correct and complete at the compleon of the service by a customer representave, or des-
ignate. Pyxis warrants these services for 30 days aer the authorizaon and will correct any qualifying
deciency in labor provided that the labor service deciency is exactly related to the originang 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 in-
corporaon of a warranted repair component into an instrument extend the whole instrument’s warranty
beyond its original term.
Warranty Shipping
A Repair Authorizaon (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 hps://pyxis-lab.com/request-tech-support/.
Pyxis Technical Support
Contact Pyxis Technical Support at [phone], [email protected], or by lling out a request for
support at hps://pyxis-lab.com/request-tech-support/.
ST-590 User Manual [email protected] | [phone]

1 Introducon
The Pyxis ST-590 inline uorometer probe measures the concentraon of Fluorescent Polymer in water.
It can be simply inserted to the compression ng port of a custom-made tee. The standard ST-001 in-
stallaon tee provided with each ST-590 sensor, has two ¾ inch female NPT ports and can be placed to an
exisng ¾ inch sample water line. Pyxis Lab also oers 2” and 3” Tee formats for larger ow installaons.
The 4–20mA current output of the ST-590 probe can be connected to any controller that accepts an iso-
lated or non-isolated 4–20mA input. The ST-590 probe is a smart device. In addion to measuring polymer
uorescence, the ST-590 probe has extra photo-electric components that monitor the color and turbidity
of the sample water. This extra feature allows automac color and turbidity compensaon to eliminate
interference commonly associated with real-world waters.
The Pyxis ST-590 probe has a short uidic channel and can be easily cleaned. The uidic and opcal ar-
rangement of the ST-590 probe is designed to overcome shortcomings associated with other uorometers
that have a distal sensor surface or a long, narrow uidic cell. Tradional inline uorometers are suscepble
to color and turbidity interference and fouling and are dicult to properly clean.
1.1 Main Features
The ST-590 measures Fluorescent Polymer in a water sample and includes the following features:
• Easy calibraon with using uPyxis® Mobile or Desktop App.
• Automac compensaon for turbidity up to 150 NTU and color created by up to 10 ppm iron or
equivalent to 10 ppm humic acid.
• Diagnosc informaon (probe fouling, color or turbidity over range, failure modes) are available in
uPyxis® App or via Modbus RTU.
• Easy to remove from the system for cleaning and calibraon without the need for any tools.
ST-590 User Manual [email protected] | [phone]

2 Specicaons
Table 1. ST-590 Specicaons
Specicaon*ST-590 ST-590SS
Part Number (P/N) 50690 50691
Fluorescent Polymer
Range 0.0–20.0 ppm
Fluorescent Polymer
Accuracy ±0.1 ppm
Excitaon Wavelength 410 nm
Emission Wavelength 450 nm
Wavelength Accuracy ±1 nm
Calibraon Two-point calibraon against standard soluon
Outputs 4–20mA Analog Output, RS-485 Digital Output with Modbus protocol
Installaon†Custom tee assembly (P/N: ST-001) with 3/4” female socket & NPT
threaded ports
Cable Length 5  with IP67 connectors & 2  ying lead with IP67 adapter
Power Supply 22–26 VDC, 1 W
Dimension (L ×Dia)‡6.8 ×1.44 (172.7 ×36.6)
Weight 0.37 lbs (170 g) 2.5 lbs (1148 g)
Material CPVC 304 Stainless Steel
Operaonal
Temperature 40–104 °F (4–40 °C)
Storage Temperature 20–140 °F (-7–60 °C)
Pressure Up to 100 psi (0.7 MPa) Up to 290 psi (2.0 MPa)
Enclosure Rang IP67
Regulaon CE
*With Pyxis’s connuous improvement policy, these specicaons are subject to change without noce.
†The ST-590SS probe does not come with the custom tee assembly (P/N: ST-001). It has 3/4” female NPT threaded
ports on the probe itself.
‡See Figure 4 for ST-590SS dimensions.
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 [email protected].
3.1 Standard Accessories
• Tee Assembly 3/4” NPT (1x Tee, O-ring, and Nut) P/N: ST-001
• 7-Pin Female Adapter/Flying Leads Cable (2 ) P/N: MA-1100
• User Manual available online at www.pyxis-lab.com/support.html
ST-590 User Manual [email protected] | [phone]

3.2 Oponal Accessories
Figure 1.
ST-590 User Manual [email protected] | [phone]

4 Installaon
4.1 ST-590 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-590 probe into the ST-001 Tee Assembly, follow the steps
below:
1. Insert the provided O-ring into the O-ring groove on the tee.
2. Insert the ST-590 probe into the tee.
3. Tighten the tee nut onto the tee to form a water-ght, compression seal.
Figure 2. Dimension of the ST-590 and the ST-001 Tee Assembly (mm)
4.2 ST-590SS Piping
The ST-590SS probe has 3/4” female NPT threaded ports on the probe 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 probe to the sampling system. Sample water entering the probe must be cooled down to below 104 °F
(40 °C). The probe 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-590SS dimensions.
ST-590 User Manual [email protected] | [phone]

Figure 3. Dimension of the ST-590SS (inch)
4.3 Wiring
If the power ground terminal and the negave 4–20mA terminal in the controller are internally connected
(non-isolated 4–20mA input), it is unnecessary to connect the 4–20mA negave wire (green) to the 4–20mA
negave 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 @ 65 mA.
*NOTE*The negave 24V power terminal (power ground) and the negave 4–20mA ter-
minal on the ST-590 probe are internally connected.
Follow the wiring table below to connect the ST-590 probe to a controller:
Table 2.
Wire Color Designaon
Red 24V +
Black 24V Power ground
White 4–20mA +
Green*4–20mA -
Blue RS-485 A
Yellow RS-485 B
Clear Shield, earth ground
*Internally connected to the power
ground
ST-590 User Manual [email protected] | [phone]

4.4 Connecng via Bluetooth
A Bluetooth adapter (P/N: MA-WB) can be used to connect a ST-590 probe to a smart phone with the uPyxis®
Mobile App or a computer with the uPyxis® Desktop App.
Figure 4. Bluetooth connecon to ST-590 probe
4.5 Connecng via USB
A USB-RS485 adapter (P/N: MA-485) can be used to connect a ST-590 probe to a computer with the uPyxis®
Desktop App.
*NOTE*Using non-Pyxis USB-RS485 adapters may result in permanent damage of the ST-
590 probe communicaon hardware.
Figure 5. USB connecon to ST-590 probe
ST-590 User Manual [email protected] | [phone]

5 Setup and Calibraon with uPyxis® Mobile App
5.1 Download uPyxis® Mobile App
Download uPyxis® Mobile App from Apple App Store or Google Play.
Figure 6.
5.2 Connecng to uPyxis® Mobile App
Turn on Bluetooth on your mobile phone (Do not pair the phone Bluetooth to the ST-590 probe). Open
uPyxis® Mobile App. Once the app is open the app will start to search for the sensor. Once the uPyxis®
Mobile App connects to the sensor, press the ST-590 probe.
Figure 7.
ST-590 User Manual [email protected] | [phone]

5.3 Calibraon Screen and Reading
When connected, the uPyxis® Mobile App will default to the Calibraon screen. From the Calibraon
screen, you can perform calibraons by pressing on Zero Calibraon,Slope Calibraon, and 4–20mA Span.
Follow the screen instrucons for each calibraon step.
Figure 8.
ST-590 User Manual [email protected] | [phone]

5.4 Diagnosis Screen
From the Diagnosis screen, you can check the diagnosis condion as well as Export & Upload. This feature
may be used for technical support when communicang with [email protected].
Figure 9.
ST-590 User Manual [email protected] | [phone]

5.5 Device Info Screen
From the Device Info screen. You can name the Device or Product as well as set the Modbus address.
Figure 10.
6 Setup and Calibraon with uPyxis® Desktop App
6.1 Install uPyxis® Desktop App
Download the latest version of uPyxis® Desktop soware package from: hp://www.pyxis-lab.com/sup-
port.html this setup package will download and install the Microso.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 applicaon. Double click the uPyxis.Setup.exe le to install.
Figure 11.
Click Install to start the installaon process. Follow the screen instrucons to complete the USB driver and
uPyxis® installaon.
ST-590 User Manual [email protected] | [phone]

6.2 Connecng to uPyxis® Desktop App
When the uPyxis® Desktop App opens, to nd your device, click on Device, then Connect via USB-RS485.
Figure 12.
6.3 Informaon Screen
Once connected to the device, a picture of the device will appear on the top le corner of the window and
the uPyxis® Desktop App will default to the Informaon screen. On the Informaon screen you can set the
informaon descripon for Device Name,Product Name, and Modbus Address, then click Set to save.
Figure 13.
ST-590 User Manual [email protected] | [phone]

6.4 Calibraon Screen
To calibrate the device, click on Calibraon. On the Calibraon screen there are three calibraon tabs, Zero
Calibraon,Slope Calibraon, and 4-20mA Span. The screen also displays the reading of the device. The
reading refresh rate is every 4 seconds.
Figure 14.
6.5 Diagnosis Screen
Aer the device has been calibrated and installaon has been completed, to check diagnosis, click on Diag-
nosis. When in the Diagnosis screen you can view the Diagnosis Condion of the device. This feature may
be used for technical support when communicang with [email protected]om.
Figure 15.
ST-590 User Manual [email protected] | [phone]

7 Communicaon using Modbus RTU
The ST-590 probe is congured as a Modbus slave device. In addion to the ppm Fluorescent Polymer
value, many operaonal parameters, including warning and error messages, are available via a Modbus
RTU connecon. Contact Pyxis Lab Customer Service ([email protected]) for more informaon.
8 Sensor Maintenance and Precauon
The ST-590 probe is designed to provide reliable and connuous Fluorescent Polymer readings even when
installed in moderately contaminated industrial cooling waters. Although the opcs are compensated for
the eects of moderate fouling, heavy fouling will prevent the light from reaching the sensor, resulng in
low readings and the potenal for product overfeed if the ST-590 probe is used as part of an automated
control system. When used to control product dosing, it is suggested that the automaon system be cong-
ured to provide backup to limit potenal product overfeed, for example by liming pump size or duraon,
or by alarming if the pumping rate exceeds a desired maximum limit.
The ST-590 probe is designed to be easily removed, inspected, and cleaned if required. It is suggested
that the ST-590 probe be checked for fouling and cleaned/calibrated on a monthly basis. Heavily contam-
inated waters may require more frequent cleanings. Cleaner water sources with less contaminaon may
not require cleaning for several months.
8.1 Methods to Cleaning the ST-590
Any equipment in contact with industrial cooling systems is subject to many potenal foulants and con-
taminants. Our inline probe cleaning soluons below have been shown to remove most common foulants
and contaminants. A small, so bristle brush, Q-Tips coon swab, or so cloth may be used to safely clean
the probe housing and the quartz opcal sensor channel. These components and more come with a Pyxis
Lab Inline Probe Cleaning Soluon Kit (P/N: SER-01) which can be purchased at our online Estore/Catalog
hps://pyxis-lab.com/product/probe-cleaning-kit/
ST-590 User Manual [email protected] | [phone]

Figure 16. Inline Probe Cleaning Soluon Kit
To clean the ST-590 probe, soak the lower half of the probe in 100 mL inline probe cleaning soluon for
10 minutes. Rinse the ST-590 probe with dislled water and then check for the ashing blue light inside
the ST-590 probe quartz tube. If the surface is not enrely clean, connue to soak the ST-590 probe for an
addional 10 minutes. Use the small, so bristle brush and Q-Tips coon swabs as necessary to remove
any remaining contaminants in the ST-590 probe quartz tube.
8.2 Storage
Avoid long term storage at temperature over 100 °F. In an outdoor installaon, properly shield the ST-590
probe from direct sunlight and precipitaon.
9 Troubleshoong
If the ST-590 probe output signal is not stable and uctuates signicantly, make an addional ground con-
necon –– 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-590 tee.
Carry out roune calibraon vericaon against a qualied Fluorescent Polymer standard. Aer properly
cleaning the ST-590 sensor, carry out the zero point calibraon with dislled water and slope calibraon us-
ing the qualied Fluorescent Polymer standard. Pyxis Lab Fluorescent Polymer Standards can be purchased
at our online Estore/Catalog hps://pyxis-lab.com/product/tag-standards/
ST-590 User Manual [email protected] | [phone]

10 Contact Us
Pyxis Lab, Inc
1729 Majesc Dr. Suite 5
Lafayee, CO 80026 USA
www.pyxis-lab.com
Phone: [phone]
Email: [email protected]
ST-590 User Manual [email protected] | [phone]