Pyxis LT-73 Series User manual

LT-73X Series User Manual [email protected] | [phone]

LT-73X Series Ultra-Low Turbidity Inline
Sensor
User Manual
February 24, 2021
Rev. 1.04
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 5
3.1 Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Oponal Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Installaon 6
4.1 FR-100 Flow Reservoir Assembly for Drinking Water Installaon . . . . . . . . . . . . . . . . 6
4.2 FT-100 Inline Tee Assembly Installaon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.3 Wiring ................................................. 8
4.4 Connecng via Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Setup and Calibraon with uPyxis® Mobile App 9
5.1 Download uPyxis® Mobile App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2 Connecng to uPyxis® Mobile App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.3 Calibraon Screen and Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.4 Diagnosis Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.5 Device Info Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 Setup and Calibraon with uPyxis® Desktop App 15
6.1 Install uPyxis® Desktop App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2 Connecng to uPyxis® Desktop App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.3 Informaon Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.4 Calibraon Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.5 Diagnosis Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7 Outputs 21
7.1 4–20mA Output Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.2 Adjusng 4–20mA Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.3 Communicaon using Modbus RTU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8 Sensor Maintenance and Precauon 23
8.1 Methods to Cleaning the LT-73X Series Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9 Troubleshoong 24
10 Contact Us 24

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/.
LT-73X Series User Manual [email protected] | [phone]

1 Introducon
The LT-73X Series sensor is an inline turbidity sensor in the ranges of 0.001 to 1,000 NTU with an ultra-ne
resoluon and meeng ISO-7027 (850 nm LED) and EPA-180.1 (warm white LED) compliance guidelines. The
quartz plate front surface in the LT-73X Series sensor allows for extended cleanliness and easy maintenance.
This sensor is designed for opmal precision and performance in a wide range of turbidity using a 90° surface
scaer conguraon. The sensor can be installed in two ow assembly formats (FR-100 Flow Reservoir
Assembly or FT-100 Inline Tee Assembly), making it versale for a variety of drinking or industrial water
applicaons. It is powered by a 24 VDC/1.5 W power supply and provides both 4–20 mA and RS-485 Modbus
output signals. When clean, the unique Pyxis sensor design oers a stability of <0.02 NTU for up to one year
without calibraon. Addionally, this sensor can be wirelessly accessed via MA-CR Bluetooth adapter for
Diagnoscs, Cleaning, and Calibraon when using the uPyxis® Mobile or Desktop App.
1.1 Main Features
The LT-73X Series sensor includes the following features:
• Warm white (3200 K) or Infrared (850 nm) LED for long operaonal life
• Resoluon as low as 0.001 NTU
• FR-100 Flow Reservoir Assembly available for all LT-73X Series sensors for opmum resoluon
• FT-100 Inline Tee Assembly available for all LT-73X Series sensors for industrial applicaons
• Built-in transmier, without preamplier or meter head
• Combinaon 4–20mA isolated signal and RS-485 Modbus output
• Simple/wireless calibraon using the MA-CR Bluetooth Adapter and uPyxis® Mobile or Desktop App
• Easily removed and cleaned without the need for tools
• Oponal Ultrasonic Adapter for automac cleaning (in development)
• Oponal calibraon with a Solid-State Calibraon Kit (T-CAL Series)
LT-73X Series User Manual [email protected] | [phone]

2 Specicaons
Table 1. LT-73X Series Specicaons
Specicaon*LT-736 LT-737 LT-739
Part Number (P/N) 53215 53216 53221
Turbidity Range 0.002–1000.00 0.001–5.000 0.001–40.00
Accuracy Using
FR-100
<40 NTU: ±0.005 NTU or ±2%
>40 NTU: ±0.02 NTU or ±2% ±0.005 NTU or ±1% <10 NTU: ±0.005 NTU or ±2% >10 NTU: ±0.01 NTU or ±2%
Accuracy Using
FT-100
<40 NTU: ±0.01 NTU or ±2%
>40 NTU: ±0.05 NTU or ±2% ±0.01 NTU or ±1% <10 NTU: ±0.01 NTU or ±2% >10 NTU: ±0.02 NTU or ±2%
Resoluon Using
FR-100
<40 NTU: ±0.001 NTU or
±0.5%
>40 NTU: ±0.02 NTU or ±1%
±0.001 NTU or ±0.5%
<10 NTU: ±0.001 NTU or
±0.5%
>10 NTU: ±0.01 NTU or ±1%
Resoluon Using
FT-100
<40 NTU: ±0.002 NTU or ±1%
>40 NTU: ±0.05 NTU or ±1% ±0.002 NTU or ±1% <10 NTU: ±0.002 NTU or ±1% >10 NTU: ±0.02 NTU or ±1%
Light Source (LED) Warm White
Compliance EPA 180.1
Calibraon
Pyxis Solid State Calibraon Kit for Repeatable Liquid-Less Calibraon,
Pyxis Formazin Standards & Dry Secondary Zero Standard for Field Cal = 0.01 Repeatability,
Pyxis Lab Factory Ultra-Pure Calibraon Services = 0.001 Repeatability
Calibraon Stability †<0.02 NTU/year dri <0.01 NTU/year dri <0.02 NTU/year dri
Outputs 4–20mA Analog Output, RS-485 Digital Output with Modbus protocol
Installaon FR-100 Flow Reservoir Assembly: 1/4” OD Tubing,
FT-100 Inline Tee Assembly: 1.5” NPT Thread & Socket
Cable Length Standard MA-4.9CR Cable (8-Pin Extension – 4.9 ),
Flying Lead MA-1.5CR Cable (8-Pin Adapter/Flying Leads – 1.5 m)
Power Supply 22–26 VDC, 1.5 W
Dimension (L ×Dia) 7.4 ×1.44 inch (189 ×36 mm)
Material 304 Stainless Steel
Operaonal
Temperature 33.8–131°F (1–50 °C)
Operaonal
Pressure
LT-73X Series sensors: up to 100 psi (6.9 Bar),
FR-100 Flow Reservoir: atmospheric pressure,
FT-100 Inline Tee: up to 100 psi (6.9 Bar)
Operaonal Flow
Rate
LT-73X Series sensors: 0–40 L/min (0–10.6 GPM),
FR-100 Flow Reservoir: 200–400 mL/min,
FT-100 Inline Tee: 0–40 L/min (0–10.6 GPM)
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.
†Assuming sensor is clean
LT-73X Series User Manual [email protected] | [phone]

Table 2. LT-73XB Specicaons
Specicaon*LT-736B LT-737B LT-739B
Part Number (P/N) 53223 53224 53225
Turbidity Range 0.002–1000.00 0.001–5.000 0.001–40.00
Accuracy Using
FR-100
<40 NTU: ±0.005 NTU or ±2%
>40 NTU: ±0.02 NTU or ±2% ±0.005 NTU or ±1% <10 NTU: ±0.005 NTU or ±2% >10 NTU: ±0.01 NTU or ±2%
Accuracy Using
FT-100
<40 NTU: ±0.01 NTU or ±2%
>40 NTU: ±0.05 NTU or ±2% ±0.01 NTU or ±1% <10 NTU: ±0.01 NTU or ±2% >10 NTU: ±0.02 NTU or ±2%
Resoluon Using
FR-100
<40 NTU: ±0.001 NTU or
±0.5%
>40 NTU: ±0.02 NTU or ±1%
±0.001 NTU or ±0.5%
<10 NTU: ±0.001 NTU or
±0.5%
>10 NTU: ±0.01 NTU or ±1%
Resoluon Using
FT-100
<40 NTU: ±0.002 NTU or ±1%
>40 NTU: ±0.05 NTU or ±1% ±0.002 NTU or ±1% <10 NTU: ±0.002 NTU or ±1% >10 NTU: ±0.02 NTU or ±1%
Light Source (LED) 850 nm
Compliance ISO-7027
Calibraon
Pyxis Solid State Calibraon Kit for Repeatable Liquid-Less Calibraon,
Pyxis Formazin Standards & Dry Secondary Zero Standard for Field Cal = 0.01 Repeatability,
Pyxis Lab Factory Ultra-Pure Calibraon Services = 0.001 Repeatability
Calibraon Stability †<0.02 NTU/year dri <0.01 NTU/year dri <0.02 NTU/year dri
Outputs 4–20mA Analog Output, RS-485 Digital Output with Modbus protocol
Installaon FR-100 Flow Reservoir Assembly: 1/4” OD Tubing,
FT-100 Inline Tee Assembly: 1.5” NPT Thread & Socket
Cable Length Standard MA-4.9CR Cable (8-Pin Extension – 4.9 ),
Flying Lead MA-1.5CR Cable (8-Pin Adapter/Flying Leads – 1.5 m)
Power Supply 22–26 VDC, 1.5 W
Dimension (L ×Dia) 7.4 ×1.44 inch (189 ×36 mm)
Material 304 Stainless Steel
Operaonal
Temperature 33.8–131°F (1–50 °C)
Operaonal
Pressure
LT-73X Series sensors: up to 100 psi (6.9 Bar),
FR-100 Flow Reservoir: atmospheric pressure,
FT-100 Inline Tee: up to 100 psi (6.9 Bar)
Operaonal Flow
Rate
LT-73X Series sensors: 0–40 L/min (0–10.6 GPM),
FR-100 Flow Reservoir: 200–400 mL/min,
FT-100 Inline Tee: 0–40 L/min (0–10.6 GPM)
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.
†Assuming sensor is clean
LT-73X Series User Manual [email protected] | [phone]

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
• MA-4.9CR Cable (4.9  8-Pin Male/Female Extension Cable) P/N: 50745
• MA-1.5CR Cable (1.5 m/4.9  8-Pin Female Adapter/Flying Lead) P/N: 50746
• MA-50CR Cable (15 m/50  8-Pin Male/Female Extension Cable) P/N: 50743
• User Manual available online at hps://pyxis-lab.com/support/
3.2 Oponal Accessories
The following oponal accessories can be ordered at [email protected] or the Pyxis E-Store at hps://pyxis-
lab.com/shop/
Table 3. Oponal Accessories
Accessory Name Part Number (P/N)
FR-100 Flow Reservoir Assembly 50779
FT-100 Inline Tee Assembly 50780
MA-CR Bluetooth Adapter For Pyxis 8-Pin Sensors MA-CR
MA-NEB USB Bluetooth Adapter For uPyxis® Desktop MA-NEB
MA-50CR Cable (15 m/50  8-Pin Male/Female Extension Cable) 50743
T-CAL 736 (Solid State Calibraon Kit for LT-736) 53229
T-CAL 737 (Solid State Calibraon Kit for LT-737) 53227
T-CAL 739 (Solid State Calibraon Kit for LT-739) 53228
Formazin 2.0 NTU Turbidity Calibraon Standard — 4,000 mL 57010-2L
Formazin 10 NTU Turbidity Calibraon Standard — 4,000 mL 57010-10L
Formazin 50 NTU Turbidity Calibraon Standard — 4,000 mL 57010-50L
Formazin 200 NTU Turbidity Calibraon Standard — 4,000 mL 57010-200L
Formazin 500 NTU Turbidity Calibraon Standard — 4,000 mL 57010-500L
LT-73X Series User Manual [email protected] | [phone]

4 Installaon
Figure 1. Dimension of the LT-73X Series sensor (mm)
4.1 FR-100 Flow Reservoir Assembly for Drinking Water Installaon
Figure 2. LT-73X Series Sensor with FR-100 Flow Reservoir Assembly
For use in drinking water installaons, the LT-73X Series ultra-low turbidity sensors should be installed using
the Pyxis FR-100 Flow Reservoir Assembly. This uniquely designed reservoir operates in a by-pass format
at a 200–400 mL/min ow rate and serves as a calming vessel. Specically designed to reduce stray light
interference, the FR-100 Flow Reservoir Assembly also allows for the eliminaon of air bubble entrainment,
drop-out of large parculate and suspended solids including precipitated inorganics such as iron and man-
ganese. The FR-100 Flow Reservoir Assembly comes wall- or panel-mountable and complete including 1/4”
tubing inlet with isolaon valve, pressure reducing valve, inline ow meter, 3/8” tubing sample output and
overow assembly as well as 1/2” NTP boom blowdown ball valve for solids removal. The LT-73X Series
sensors can be easily installed via the union adapter provided onto the side wall of the FR-100 Flow Reser-
voir Assembly. When emped and cleaned, the FR-100 may also serve as a zero-point calibraon check of
the sensor. Replacement sensors or reservoirs may be purchased independently.
LT-73X Series User Manual [email protected] | [phone]

Figure 3. FR-100 Flow Reservoir Assembly Dimensions (mm) & Diagram
4.2 FT-100 Inline Tee Assembly Installaon
Figure 4. LT-73X Series Sensor with FT-100 Inline Tee Assembly
For use in alternave installaons, the LT-73X Series ultra-low turbidity sensors may also be installed using
the Pyxis FT-100 Inline Flow Tee Assembly. This uniquely designed in-line Tee operates at up to 40 Liters/Min
(10.6 GPM) ow rate and operang pressures as high as 6.9 bar (100 psi). Constructed of Schedule 40-CPVC
and designed with a unique 45° downward angle for extended sensor cleanliness, the FT-100 in-line Tee
assembly allows for users to install the LT-73X Series sensor in pressurized ow applicaons with limited
space. This inline tee dramacally reduces the installaon space requirement and is highly compable
with most by-pass sensor plumbing installaons, allowing the user to easily remove the sensor for wireless
cleaning and maintenance. The LT-73X Series sensor’s at disllate end is specically designed to prevent
air bubbles from accumulang when installed in the FT-100. When emped and cleaned, the FT-100 may
also serve as a low range (zero-point) calibraon of the sensor via the uPyxis® App. The FT-100 Inline Flow
Tee Assembly oers 1.5” FNPT threaded and socket adapters with quick unions to allow for rapid installaon
or replacement. The FT-100 Inline Flow Tee Assembly may be purchased independently as desired.
LT-73X Series User Manual [email protected] | [phone]

Figure 5. FT-100 Inline Tee Assembly Dimensions (mm) & Diagram
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 (gray) 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 LT-73X Series sensor are internally connected.
Follow the wiring table below to connect the LT-73X Series sensor to a controller:
Table 4.
Wire Color Designaon
Red 24V +
Brown 24V Power ground
White 4–20mA +
Gray*4–20mA -
Blue RS-485 A
Yellow RS-485 B
Pink RS-485 C
Green Earth ground
Black Shield
*Internally connected to the power
ground
LT-73X Series User Manual [email protected] | [phone]

4.4 Connecng via Bluetooth
A Bluetooth adapter (P/N: MA-CR) can be used to connect a LT-73X Series sensor to a smart phone with the
uPyxis® Mobile App or a computer with the uPyxis® Desktop App.
Figure 6. Bluetooth connecon to LT-73X Series sensor
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 7. uPyxis® Mobile App installaon
LT-73X Series User Manual [email protected] | [phone]

5.2 Connecng to uPyxis® Mobile App
Connect the LT-73X 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 connecon is successful, the LT-73X Series and its Serial Number (SN) will be displayed (Figure
8).
4. Press on the LT-73X Series sensor image.
Figure 8.
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 Low Range Calibraon,Mid Range Calibraon,High
Range Calibraon, and 4–20mA Span. Please refer to the following table for the recommended turbidity
standard soluon for each range:
Table 5. Recommended Formazin Calibraon Standards
Calibraon Range LT-736/LT-736B LT-737/LT-737B LT-739/LT-739B
Near Zero/Low Bubble-free DI or sample <0.1 NTU
Mid 5–50 NTU 1–2 NTU 5–10 NTU
High 500–1000 NTU 3–5 NTU 20–40 NTU
LT-73X Series User Manual [email protected] | [phone]

Figure 9.
5.3.1 Low Range Calibraon
1. Empty the FR-100 Flow Reservoir or FT-100 Tee.
2. Wipe the FR-100 Flow Reservoir or FT-100 Tee walls and the LT-73X Series sensor surface with a dust-
free cloth and conrm there are no obvious contaminants.
3. Fill the FR-100 Flow Reservoir or FT-100 Tee with deionized (DI) water.
4. Use a brush or the dust-free cloth to clean the FR-100 Flow Reservoir or FT-100 Tee walls and the
LT-73X Series sensor surface.
5. Thoroughly drain the polluted DI water.
6. Repeat steps 3–5 three mes to ensure opmum cleanliness.
7. Fill the FR-100 Flow Reservoir or FT-100 Tee with bubble-free DI water.
8. Allow the displayed data to stabilize; this could take some me to eliminate air bubbles.
9. Press Low Range Calibraon to begin the low range calibraon.
10. Enter ”0.05” for the known turbidity value.
*NOTE*Because there is no global standard for zero turbidity in the industry, Pyxis
recommends 0.05 NTU as a target low range calibraon using bubble-free DI wa-
ter. Users may vary from this entry value if desired, however, a true “zero” turbidity
calibraon standard does not exist.
11. If the calibraon is successful, the interface will return a message ”Calibraon Succeeded”. If the
calibraon has failed, the interface will return a message ”Calibraon Failed” and the user must repeat
the process.
LT-73X Series User Manual [email protected] | [phone]

5.3.2 Mid Range Calibraon
1. Conduct the Low Range Calibraon steps above.
2. Empty the FR-100 Flow Reservoir or FT-100 Tee and rell with a known turbidity standard soluon
according to the Recommended Formazin Calibraon Standards table.
3. Allow the displayed data to stabilize.
4. Press Mid Range Calibraon to begin the middle range calibraon.
5. Enter the known turbidity value.
6. If the calibraon is successful, the interface will return a message ”Calibraon Succeeded”. If the
calibraon has failed, the interface will return a message ”Calibraon Failed” and the user must repeat
the process.
5.3.3 High Range Calibraon
If the high range calibraon is not required, the user does not need to calibrate the high range. To connue
the high range calibraon using a second turbidity standard soluon, use the following steps:
1. Conduct the Mid Range Calibraon steps above.
2. Empty the FR-100 Flow Reservoir or FT-100 Tee and rell with a known turbidity standard soluon
according to the Recommended Formazin Calibraon Standards table.
3. Allow the displayed data to stabilize.
4. Press High Range Calibraon to begin the middle range calibraon.
5. Enter the known turbidity value.
6. If the calibraon is successful, the interface will return a message ”Calibraon Succeeded”. If the
calibraon has failed, the interface will return a message ”Calibraon Failed” and the user must repeat
the process.
5.3.4 T-CAL Solid State Calibraon
Alternavely, Pyxis Lab has developed reusable solid-state turbidity calibraon kits for rapid calibraon of
the Pyxis LT-73X Series sensor. The T-CAL calibraon kits represent an alternave to Formazin calibraon
for roune eld calibraon only. The Pyxis solid-state calibraon kits provide a consistent and reproducible
method to calibrate Pyxis LT-73X Series sensors, overcoming the challenges associated with the liquid stan-
dard calibraon.
Table 6. T-CAL Calibraon Kit Specicaons for LT-73X Sensors
Specicaon T-CAL 736 T-CAL 737 T-CAL 739
Part Number (P/N) 53229 53227 53228
Turbidies Included
0.10±0.05 NTU,
8.0±0.8 NTU,
25.0±0.4 NTU,
600±60 NTU
0.10±0.05 NTU,
1.5±0.15 NTU,
4.0±0.4 NTU
0.10±0.05 NTU,
8.0±0.8 NTU,
25.0±2.5 NTU
LT-73X Series User Manual [email protected] | [phone]

Table 7. T-CAL Calibraon Kit Specicaons for LT-73XB Sensors
Specicaon T-CAL 736B T-CAL 737B T-CAL 739B
Part Number (P/N) 53239 53237 53238
Turbidies Included
0.10±0.05 NTU,
8.0±0.8 NTU,
25.0±0.4 NTU,
600±60 NTU
0.10±0.05 NTU,
1.5±0.15 NTU,
4.0±0.4 NTU
0.10±0.05 NTU,
8.0±0.8 NTU,
25.0±2.5 NTU
To calibrate the LT-73X Series sensor with the T-CAL kit, use the following steps:
1. Remove the LT-73X Series sensor from the FR-100 Flow Reservoir or FT-100 Tee.
2. Clean the LT-73X Series sensor surface gently with a so towel.
3. Insert the LT-73X Series sensor into the appropriate T-CAL kit based on the T-CAL Calibraon Kit Spec-
icaons for LT-73X Sensors and T-CAL Calibraon Kit Specicaons for LT-73XB Sensors tables.
4. Press either Low Range Calibraon,Mid Range Calibraon, or High Range Calibraon.
5. Enter the designated NTU value assigned to the T-CAL kit for the known turbidity value.
Figure 10. LT-73X Series sensor use with T-CAL kit
LT-73X Series 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].
To preform a Cleanliness Check, rst select the Diagnosis Condion which denes the uid type that the
LT-73X Series sensor in currently measuring, then press Cleanliness Check. If the sensor is clean, a Clean
message will be shown. If the sensor is severely fouled, a Dirty message will be shown. In this case, follow
the procedure in the Methods to Cleaning the LT-73X Series Sensor secon of this manual.
Figure 11.
LT-73X Series User Manual [email protected] | [phone]

5.5 Device Info Screen
From the Device Info screen. You can name the Device or Product.
Figure 12.
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ps://pyxis-lab.com/upyxis/ 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 13. uPyxis® Desktop App installaon
Click Install to start the installaon process. Follow the screen instrucons to complete the USB driver and
uPyxis® installaon.
LT-73X Series User Manual [email protected] | [phone]

6.2 Connecng to uPyxis® Desktop App
Connect the LT-73X Series sensor to a Windows computer using a Bluetooth/USB adapter (P/N: MA-NEB)
according to the following steps:
1. Plug the Bluetooth/USB adapter into a USB port in the computer.
2. Launch uPyxis® Desktop App.
3. On uPyxis® Desktop App, click Device →Connect via USB-Bluetooth (Figure 14).
4. If the connecon is successful, the LT-73X Series and its Serial Number (SN) will be displayed in the
le pane of the uPyxis® window.
*NOTE*Aer the sensor and Bluetooth is powered up, it may take up to 10 seconds for the
adapter to establish the wireless signal for communicaon.
Figure 14.
LT-73X 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 15.
6.4 Calibraon Screen
To calibrate the device, click on Calibraon. On the Calibraon screen there are three calibraon buons,
Low Range Calibraon,Mid Range Calibraon,High Range Calibraon, and 4–20mA Span. The screen also
displays the reading of the device. The reading refresh rate is every 4 seconds. Please refer to the following
table for the recommended turbidity standard soluon for each range:
Table 8. Recommended Formazin Calibraon Standards
Calibraon Range LT-736/LT-736B LT-737/LT-737B LT-739/LT-739B
Near Zero/Low Bubble-free DI or sample <0.1 NTU
Mid 5–50 NTU 1–2 NTU 5–10 NTU
High 500–1000 NTU 3–5 NTU 20–40 NTU
LT-73X Series User Manual [email protected] | [phone]