Pyxis ST-590 Series User manual
Table of Contents
1 Introducon 2
1.1 MainFeatures......................................... 2
2 Specicaons 3
3 Unpacking Instrument 3
3.1 StandardAccessories ..................................... 3
3.2 OponalAccessories ..................................... 4
4 Installaon 5
4.1 ST-590Piping ......................................... 5
4.2 ST-590SSPiping ........................................ 5
4.3 Wiring............................................. 6
4.4 ConnecngviaBluetooth................................... 7
4.5 ConnecngviaUSB ...................................... 7
5 Setup and Calibraon with uPyxis® Mobile App 8
5.1 Download uPyxis® MobileApp................................ 8
5.2 Connecng to uPyxis® MobileApp.............................. 8
5.3 Calibraon Screen and Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.4 DiagnosisScreen ....................................... 10
5.5 DeviceInfoScreen....................................... 11
6 Setup and Calibraon with uPyxis® Desktop App 11
6.1 Install uPyxis® DesktopApp.................................. 11
6.2 Connecng to uPyxis® DesktopApp ............................. 12
6.3 InformaonScreen ...................................... 12
6.4 CalibraonScreen....................................... 13
6.5 DiagnosisScreen ....................................... 13
7 Communicaon using Modbus RTU 14
8 Sensor Maintenance and Precauon 14
8.1 Methods to Cleaning the ST-590 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.2 Storage ............................................ 15
9 Troubleshoong 15
10 Contact Us 15
Warranty Informaon
Condenality
The informaon contained in this manual may be condenal and proprietary and is the property of Pyxis
Lab, Inc. Informaon disclosed herein shall not be used to manufacture, construct, or otherwise reproduce
the goods described. Informaon disclosed herein shall not be disclosed to others or made public in any
manner without the express wrien consent of Pyxis Lab, Inc.
Standard Limited Warranty
Pyxis Lab warrants its products for defects in materials and workmanship. Pyxis Lab will, at its opon, repair
or replace instrument components that prove to be defecve with new or remanufactured components
(i.e., equivalent to new). The warranty set forth is exclusive and no other warranty, whether wrien 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 dysfunconal instruments may be returned to Pyxis for repair or replacement. In some in-
stances, replacement instruments may be available for short duraon loan or lease.
Pyxis warrants that any labor services provided shall conform to the reasonable standards of technical com-
petency and performance eecve at the me of delivery. All service intervenons are to be reviewed and
authorized as correct and complete at the compleon of the service by a customer representave, or des-
ignate. Pyxis warrants these services for 30 days aer the authorizaon and will correct any qualifying
deciency in labor provided that the labor service deciency is exactly related to the originang 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-
corporaon of a warranted repair component into an instrument extend the whole instrument’s warranty
beyond its original term.
Warranty Shipping
A Repair Authorizaon (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 hps://pyxis-lab.com/request-tech-support/.
Pyxis Technical Support
Contact Pyxis Technical Support at +1 (866) 203-8397, [email protected], or by lling out a request for
support at hps://pyxis-lab.com/request-tech-support/.
1 Introducon
The Pyxis ST-590 inline uorometer probe measures the concentraon 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-
stallaon tee provided with each ST-590 sensor, has two ¾ inch female NPT ports and can be placed to an
exisng ¾ inch sample water line. Pyxis Lab also oers 2” and 3” Tee formats for larger ow installaons.
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 addion 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 automac color and turbidity compensaon 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 opcal 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. Tradional inline uorometers are suscepble
to color and turbidity interference and fouling and are dicult to properly clean.
1.1 Main Features
The ST-590 measures Fluorescent Polymer in a water sample and includes the following features:
• Easy calibraon with using uPyxis® Mobile or Desktop App.
• Automac compensaon for turbidity up to 150 NTU and color created by up to 10 ppm iron or
equivalent to 10 ppm humic acid.
• Diagnosc informaon (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 calibraon without the need for any tools.
2 Specicaons
Table 1. ST-590 Specicaons
Specicaon*ST-590 ST-590SS
Part Number (P/N) 50690 50691
Fluorescent Polymer
Range 0.0–20.0 ppm
Fluorescent Polymer
Accuracy ±0.1 ppm
Excitaon Wavelength 410 nm
Emission Wavelength 450 nm
Wavelength Accuracy ±1 nm
Calibraon Two-point calibraon against standard soluon
Outputs 4–20mA Analog Output, RS-485 Digital Output with Modbus protocol
Installaon†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
Operaonal
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 Rang IP67
Regulaon CE
*With Pyxis’s connuous improvement policy, these specicaons are subject to change without noce.
†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
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
4 Installaon
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.
Figure 3. Dimension of the ST-590SS (inch)
4.3 Wiring
If the power ground terminal and the negave 4–20mA terminal in the controller are internally connected
(non-isolated 4–20mA input), it is unnecessary to connect the 4–20mA negave wire (green) to the 4–20mA
negave 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 negave 24V power terminal (power ground) and the negave 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 Designaon
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
4.4 Connecng 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 connecon to ST-590 probe
4.5 Connecng 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 communicaon hardware.
Figure 5. USB connecon to ST-590 probe
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