Pyxis ST-565T User manual

ST-565 Series User Manual [e-mail] | [phone]

ST-565 Series
Inline Azole Sensors
User Manual
April 7, 2022
Rev. 1.44
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 Main Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Specicaons 3
3 Unpacking Instrument 3
3.1 Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2 Oponal Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4 Installaon 5
4.1 Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.3 Connecng via Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.4 Connecng via USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Setup and Calibraon with uPyxis® Mobile App 7
5.1 Download uPyxis® Mobile App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.2 Connecng to uPyxis® Mobile App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.3 Calibraon Screen and Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.4 Diagnosis Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.5 Device Info Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Setup and Calibraon with uPyxis® Desktop App 11
6.1 Install uPyxis® Desktop App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2 Connecng to uPyxis® Desktop App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.3 Informaon Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.4 Calibraon Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.5 Diagnosis Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Outputs 14
7.1 4–20mA Output Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.2 Adjusng 4–20mA Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.3 Communicaon using Modbus RTU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8 Sensor Maintenance and Precauon 16
8.1 Methods to Cleaning the ST-565 Series Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9 Troubleshoong 17
10 Contact Us 17

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-565 Series User Manual [email protected] | [phone]

1 Introducon
The ST-565 Series inline uorometers are patented to Pyxis Lab Inc. These devices ulized UV light uores-
cence to detect Halogenated Tolytriazole (HST with ST-565) and Tolytriazole (TTA with ST-565T) content in
water. The results are instantaneous and, with proper applicaon understanding, results are highly reliable.
It is important to note that this technology is not wet chemistry tesng for azole content and variaons may
be observed depending on the quality of the water sample. In certain waters the background of other or-
ganic maer may cause a false posive reading of azole due to UV uorescence or absorbance. Inconsistent
makeup water quality with lile organic loading (ie. city water makeup) and systems with no known organic
contaminaon (ie. hydrocarbon) this technology is very accurate in comparison to wet chemistry methods.
The ST-565 Series sensor does not dierenate between azole species or reacted versus unreacted azole.
The device measures the total UV uorescence signature of the azole and oers the nal value as ppm
Halogenated Tolytriazole (HST with ST-565) and Tolytriazole (TTA with ST-565T). It is incumbent for the user
to idenfy the correlaon to exact wet chemistry values and potenal background interference should be
accounted for by idenfying untreated makeup for UV uorescent signal and removing that from the nal
value measured.
The ST-565 Series sensor will not work in waters containing Nitrite treatment as Nitrite absorbs UV light
and will result in a false high value. With these applicaon limitaons clearly understood, the ST-565 Se-
ries sensor is commonly used for rapid azole validaon, dramacally reducing service me enabling water
treaters to adjust their programs accordingly. It is important to note however, that there are some applica-
ons (surface makeup water systems or high organic loading/contaminated systems) where this technology
is not ideal due to a high degree of interference. The user needs to understand the dynamics of their system
and evaluate its use accordingly.
1.1 Main Features
The ST-565 Series measures Halogenated Tolytriazole (HST with ST-565)/Tolytriazole (TTA with ST-565T) 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 and color.
• Water sample does not need to be acidied. Sample pH between 6.4 to 10.0 and the sample PTSA
concentraon (<300 ppb) do not aect the azole measurement.
• Diagnosc informaon (sensor 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-565 Series User Manual [email protected] | [phone]

2 Specicaons
Table 1. ST-565 Series Specicaons
Specicaon*ST-565 ST-565T
Part Number (P/N) 50664 50671
Azole Species Halogenated Tolytriazole (HST) Tolytriazole (TTA)
Azole Range (4-20mA) 0–7.5 ppm 0–10.0 ppm
Azole Accuracy ±0.2 ppm
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” FNPT socket & threaded ports
Cable Length 1.5 meter with IP67 connectors & 1.5 meter flying lead with IP67 adapter
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 UPVC
Operaonal
Temperature 32–120 °F (0–49 °C)
Storage Temperature -4–140 °F (-20–60 °C)
Pressure Up to 100 psi (0.7 MPa)
Flowrate 0–8 gpm (505 cm3/s)
Enclosure Rang IP67
Regulaon CE / RoHS
*With Pyxis’s connuous improvement policy, these specicaons are subject to change without noce.
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
P/N: ST-001
•Tee Assembly 3/4” NPT (1x Tee, O-ring, and Nut)
• 7-Pin Female Adapter/Flying Leads Cable (1.5 meter)P/N: MA-1100
• User Manual available online at hps://pyxis-lab.com/support/
ST-565 Series User Manual [email protected] | [phone]

3.2 Oponal Accessories
The following oponal accessories can be ordered from Pyxis Customer Service (or[email protected]) or
Pyxis E-Store at hps://pyxis-lab.com/shop/.
Figure 1.
ST-565 Series User Manual [email protected] | [phone]
Optional Accessories Information P/N
ST-001 Inline Tee Assembly Spare (3/4 –inch FNPT Inline Tee For ST Probes) 50704
HST-01 (HST Calibration Standard 1ppm for ST-565T / 500mL) 20131
HST-02 (HST Calibration Standard 2ppm for ST-565T / 500mL) 20132
TTA-01 (TTA Calibration Standard 1ppm for ST-565T / 500mL) 57015
TTA-02 (TTA Calibration Standard 2ppm for ST-565T / 500mL) 57016
Probe Cleaning Kit (Contains Probe Cleaner Solution 100mL + Qtips + Pipe Cleaners) SER-01
MA-WB Bluetooth Adapter (Pyxis Bluetooth Adapter for 7Pin Pyxis Sensors) MA-WB
PowerPACK-1 (Single Chanel Auxiliary Power Supply w/Bluetooth For Pyxis Sensors) MA-BLE-1
PowerPACK-4 (Four Chanel Auxiliary Power Supply w/Bluetooth For Pyxis Sensors) MA-BLE-4
MA-NEB Bluetooth/USB Adapter (Enables Bluetooth for Desktop and uPyxis APP) MA-NEB
SP-395 Handheld HST Fluorometer (HST 0-7.5ppm) 50209
SP-395T Handheld HST Fluorometer (TTA - 10.0ppm) 50221
MA-C10 (10’ Extension Cable for 7Pin Pyxis Sensors) 50738
MA-C50 (50’ Extension Cable for 7Pin Pyxis Sensors) 50705

4 Installaon
4.1 Piping
The ST-565 Series sensor can be installed in an inline ow applicaon using the included Pyxis ST-001 Inline
Tee Assembly. The ST-001 oers 3/4” FNPT thread or socket weld adapters with unions for easy installaon
and sensor maintenance. To properly install the ST-565 Series sensor 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-565 Series sensor into the tee.
3. Tighten the tee nut onto the tee to form a water-ght, compression seal.
Figure 2. Dimension of the ST-565 Series sensor and the ST-001 Tee Assembly (mm)
ST-565 Series User Manual [email protected] | [phone]

4.2 Wiring
The power ground wire (black) and the negative 4–20mA are internally connected. There is connection of
a 4-20mA- wire for ST565 series. 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 negative 24V power terminal (power ground) and the negative 4–20mA terminal on the ST-
565 Series sensor are internally connected.
Follow the wiring table below to connect the ST-565 Series sensor to a controller:
Table 2.
4.3 Connecng via Bluetooth
A Bluetooth adapter (P/N: MA-WB) can be used to connect a ST-565 Series sensor to a smart phone with
the uPyxis® Mobile App or a computer with the uPyxis® Desktop App.
Figure 3. Bluetooth connection to ST-565 Series sensor with MA-WB and uPyxis Mobile App.
ST-565 Series User Manual [email protected] | [phone]
ST-565 Wiring Table (HST) ST-565T Wiring Table (TTA)
Color Designation Color Designation
Red 24V+ Red 24V+
Black 24V- Black 24V-
White 4-20mA +
HST (0-7.5ppm) White 4-20mA + TTA (0-10.0ppm)
Green No Connect Green No Connect
Blue RS-485 A Blue RS-485 A
Yellow RS-485 B Yellow RS-485 B
Clear Earth Ground Clear Earth Ground

4.4 Connecng via USB
A USB-RS485 adapter (P/N: MA-485) can be used to connect a ST-565 Series sensor to a computer with the
uPyxis® Desktop App.
*NOTE*Using non-Pyxis USB-RS485 adapters may result in permanent damage of the ST-
565 Series sensor communicaon hardware.
Figure 4. USB connection to ST-565 Series sensor with MA-485 and uPyxis Destop App.
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 5. uPyxis® Mobile App installaon
ST-565 Series User Manual [email protected] | [phone]

5.2 Connecng to uPyxis® Mobile App
Connect the ST-565 Series sensor to a mobile smart phone according to the following 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-565 Series and its Serial Number (SN) will be displayed (Figure 6).
4. Press on the ST-565 Series sensor image.
Figure 6.
ST-565 Series User Manual [email protected] | [phone]
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.
Figure 7.

ST-565 Series User Manual [email protected] | [phone]
5.4 Diagnosis Screen
From the Diagnosis screen, you can check the diagnosis condion as well as Send to Pyxis. This feature
may be used for technical support when communicang with [email protected].
To preform a sensor Cleanliness Check, rst select the Diagnosis Condion which denes the uid type
that the ST-565 Series sensor in currently measuring, then press Cleanliness Check. If the sensor is clean, a
green Clean message will be shown. If the sensor is parally fouled, a yellow Becoming Dirty message
will be shown. If the sensor is severely fouled, a red Dirty message will be shown. In this case, follow the
procedure in the Methods to Cleaning the ST-565 Series Sensor secon of this manual.
Figure 8.

5.4 Diagnosis Screen
From the Diagnosis screen, you can check the diagnosis condion as well as Send to Pyxis. This feature
may be used for technical support when communicang with [email protected].
To preform a sensor Cleanliness Check, rst select the Diagnosis Condion which denes the uid type
that the ST-565 Series sensor in currently measuring, then press Cleanliness Check. If the sensor is clean, a
green Clean message will be shown. If the sensor is parally fouled, a yellow Becoming Dirty message
will be shown. If the sensor is severely fouled, a red Dirty message will be shown. In this case, follow the
procedure in the Methods to Cleaning the ST-565 Series Sensor secon of this manual.
Figure 8.
ST-565 Series 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 9.

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 11. uPyxis® Desktop App installation
Click Install to start the installaon process. Follow the screen instrucons to complete the USB driver and
uPyxis® installaon.
ST-565 Series User Manual [email protected] | [phone]
Figure 10. USB Connection to ST-565 sensor with MA-WB and MA-NEB and uPyxis Desktop App.

6.2 Connecng to uPyxis® Desktop App
Connect the ST-565 Series sensor to a Windows computer using either a Bluetooth/USB adapter (P/N: MA-
NEB) or a USB-RS485 adapter (P/N: MA-485) according to the following steps:
1. Plug the Bluetooth/USB adapter or USB-RS485 adapter into a USB port in the computer.
2. Launch uPyxis® Desktop App.
3. On uPyxis® Desktop App, click Device→Connect via USB-Bluetooth or Connect via USB-RS485 (Fig-
ure 12).
4. If the connection is successful, the ST-565 Series and its Serial Number (SN) will be displayed in the
le 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 12.
ST-565 Series User Manual [email protected] | [phone]

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 Apply Sengs
to save.
Figure 13.
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 Sp an. The screen also displays the reading of the de vice. The
reading refresh rate is every 4 seconds.
Figure 14.
ST-565 Series User Manual [email protected] | [phone]

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].
Figure 15.
7 Outputs
7.1 4–20mA Output Setup
The 4–20mA output of the ST-565 sensor is scaled as:
• Halogenated Tolytriazole (HST):
–4 mA = 0 ppm
–20 mA = 7.5 ppm
The 4–20mA output of the ST-565T sensor is scaled as:
• Tolytriazole (TTA):
–4 mA = 0 ppm
–20 mA = 10.0 ppm
ST-565 Series User Manual [email protected] | [phone]

7.2 Adjusng 4–20mA Span
Users may adjust the output scale using 4–20mA Span to change the HST or TTA ppm 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 16. For the uPyxis® Desktop App, click 4-20mA Span found on the
Calibration Screen, shown in Figure 17.
Figure 16.
Figure 17.
7.3 Communicaon using Modbus RTU
The ST-565 Series sensor is congured as a Modbus slave d evice. In addion to the HST or TTA ppm val-
ues, 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.
ST-565 Series User Manual [email protected] | [phone]

8 Sensor Maintenance and Precauon
The ST-565 Series sensor is designed to provide reliable and connuous HST or TTA 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-565 Series sensor is used as part of an auto-
mated control system. When used to control product dosing, it is suggested that the automaon system
be congured 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-565 Series sensor is designed to be easily removed, inspected, and cleaned if required. It is sug-
gested that the ST-565 Series sensor be checked for fouling and cleaned/calibrated on a monthly basis.
Heavily contaminated waters may require more frequent cleanings. Cleaner water sources with less con-
taminaon may not require cleaning for several months. The need to clean the ST-565 Series sensor can
be determined by the Cleanliness Check using the uPyxis® Mobile App (see the Mobile Diagnosis Screen
secon).
8.1 Methods to Cleaning the ST-565 Series Sensor
Any equipment in contact with industrial cooling systems is subject to many potenal foulants and contam-
inants. Our inline sensor 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
sensor 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 E-Store hps://pyxis-
lab.com/product/probe-cleaning-kit/
Figure 18. Inline Probe Cleaning Solution Kit
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To clean the ST-565 Series sensor, soak the lower half of the sensor in 100 mL inline sensor cleaning soluon
for 10 minutes. Rinse the ST-565 Series sensor with dislled water and then check for the ashing blue light
inside the ST-565 Series sensor quartz tube. If the surface is not enrely clean, connue to soak the ST-565
Series sensor 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-565 Series sensor quartz tube.
8.2 Storage
Avoid long term storage at temperature over 100 °F. In an outdoor installaon, properly shield the ST-565
Series sensor from direct sunlight and precipitaon.
9 Troubleshoong
If the ST-565 Series sensor output signal is not stable and uctuates signicantly, make an addional ground
connec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-565 Series tee.
Carry out roune calibraon vericaon against a qualied Halogenated Tolytriazole (HST with ST-565) or
Tolytriazole (TTA with ST-565T) standard. Aer properly cleaning the ST-565 Series sensor, carry out the zero
point calibraon with dislled water and slope calibraon using the qualied standard. Pyxis Lab HST Cal-
ibraon Standard can be purchased at our online Estore/Catalog hps://pyxis-lab.com/product/halogen-
stable-triazole-calibraon-standards/. Pyxis Lab TTA Calibraon Standard can be purchased at our online
Estore/Catalog hps://pyxis-lab.com/product/a-standards/.
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-565 Series User Manual [email protected] | [phone]