Pyxis LT-63 Series User manual

LT-63X Series
Submersible Self-Cleaning
Turbidity Sensor
Operation Manual
August 24, 2023
Rev. 1.03
Pyxis Lab, Inc.
1729 Majestic Dr. Suite 5
Lafayette, CO 80026 USA
www.pyxis-lab.com
© 2020 Pyxis Lab, Inc.
Pyxis Lab Proprietary and Confidential

Pyxis LT-63X Series User Manual [e-mail] | [phone]
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 in-
stances, 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 in-
corporation 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://www.pyxis-lab.com/request-return-or-repair/
Pyxis Technical Support
Contact Pyxis Technical Support at [phone] or [e-mail]

Pyxis LT-63X Series User Manual [e-mail] | [phone]
Table of Contents
1 Introduction....................................................................................................................................4
1.1 Features ............................................................................................................................................ 4
1.2 Specifications .................................................................................................................................... 5
1.3 Unpacking the Pyxis LT-63X Series Sensor........................................................................................ 5
1.4 Standard Accessories ........................................................................................................................ 6
1.5 Optional Accessories......................................................................................................................... 6
2Quick 4-20mA Start ........................................................................................................................7
3Installation.....................................................................................................................................8
4Calibration and Diagnosis .............................................................................................................10
4.1 Calibration and Diagnosis by uPyxis Mobile APP ............................................................................ 10
4.1.1 Calibration................................................................................................................................... 11
4.1.1.1 Deionized Water Calibration......................................................................................................12
4.1.1.2 Mid-Range Calibration ............................................................................................................... 12
4.1.1.3 High-Range Calibration ..............................................................................................................13
4.1.2 Restore to Factory Calibration Settings ......................................................................................14
4.1.3 Diagnosis ..................................................................................................................................... 15
4.1.4 Cleaning Period Adjustment .......................................................................................................16
4.2 Calibration and Diagnosis by uPyxis Desktop APP .......................................................................... 17
4.2.1 Calibration................................................................................................................................... 20
4.2.1.1 Deionized Water Calibration......................................................................................................21
4.2.1.2 Mid-Range Calibration ............................................................................................................... 21
4.2.1.3 High-Range Calibration ..............................................................................................................22
4.2.2 Restore to Factory....................................................................................................................... 23
4.2.3 Diagnosis ..................................................................................................................................... 24
4.2.4 Cleaning Period Adjustment .......................................................................................................24
5Modbus RTU ................................................................................................................................25
6Sensor Cleaning and Maintenance ................................................................................................25
7Sensor Wiper Replacement Instructions........................................................................................26
8Contact Us ...................................................................................................................................27

Pyxis LT-63X Series User Manual [e-mail] | [phone]
1 Introduction
The LT-63X series sensor platform (including the LT-631, LT-632 and LT-633) are submersible, waterproof,
self-cleaning sensors utilize dual wavelength detection technology to measure turbidity in the ranges of 0
to 4000 NTU. The sensor automatically compensates for disturbances caused by flow fluctuations, climate
change, color change or changes in turbidity. The instrument design is virtually maintenance-free, and the
self-cleaning capability of the sensor prevents deviations caused by air bubbles and suspended solids
particulate. It is powered by a 24 VDC/6W power supply and offers fully integrated 4-20 mA and RS-485
Modbus output signals for connection to any controller, PLC or DCS network. When clean, the unique
Pyxis sensor design offers a stability of <0.1 NTU for up to 1-year without calibration. Additionally, this
sensor platform can be accessed via the MA-CR Bluetooth/USB adapter for local display, diagnostics, auto-
wiper programming, sensor cleaning and calibration when using the uPyxis APP for mobile or desktop
devices. The LT-63X series sensor is ideal for use in raw water, surface water, storm water, process water
and discharged water applications.
1.1 Features
The LT-63X Series sensor includes the following features:
•Resolution as low as 0.1 NTU
•Built-in transmitter, without preamplifier or meter head
•Combination 4-20mA isolated signal and RS-485 Modbus (RTU) output
•Simple / Wireless calibration using uPyxis Mobile or Desktop APPs and MA-CR Bluetooth Adapter
•Supports self-cleaning of sensor lens for dirty water applications
•Optional calibration with Pyxis Formazin calibration standards or field water samples
•¾-inch MNPT Threaded For Fixed Submersion
Figure 1 LT-63X Series Dimensions (mm)

Pyxis LT-63X Series User Manual [e-mail] | [phone]
1.2 Specifications
Item
LT-631
LT-632
LT-633
P/N
53249
53250
10002
Parameter
Turbidity
Measurement Range
(4-20mA Output Scale)
0.00 –500.00
0.00 –1000.00
0.00 –4000.00
Unit of Measure
NTU
Nephelometric Turbidity Unit
Lower Detection Limit
0.5NTU
Precision
(Tested in Formazin standard solution (25°C) )
<100 NTU: ±3%of reading or 2 NTU
>100 NTU: ±10% of reading
Resolution
0.1NTU
Response Time
T95<12 Seconds
Calibration Method
Field Tested Process Sample or Formazin Calibration Standard
Dual Wavelength
Warm White Light <100NTU / Infrared Light >100NTU
Method
Scattering
Power Supply
22 –26VDC 6W
Operating Temperature
32 –122 °F (0-50 °C)
Storage Temperature
-7 °C –60 °C (20 –140 °F)
Outputs
Isolated 4 –20 mA Analog Output & Isolated RS-485 Digital Output
Installation
Submersed –Fixed Conduit ¾-inch MPNT Threaded Cable Fitting
Submersed –Hoisting Chain or Cable
Sensor Distance from Bottom of Vessel (>15cm)
Sensor Distance from Sides of Vessel (>10cm)
Material
316 Stainless Steel –Body & Wiper Arm
PTFE –Wiper Blade
Weight
1,530 g (3.3 lbs)
Operational Pressure
45 psi (3.1 Bar)
Rating
IP-68, Fully Dustproof & Waterproof
Regulation
CE / RoHS
Dimension (L x W x H)
(254mm x 57mm x 57mm)
Cable Length
33 feet (10m) w/IP-67 8-Pin adapter
4.9 feet (1.5m) flying lead w/IP-67 8-Pin adapter
(Extension Cables Also Available)
*Note*: Pyxis Lab specifications are subject to change without notice
1.3 Unpacking the Pyxis LT-63X Series Sensor
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 items listed on the packing slip are
included. If any items are missing or damaged, please contact Pyxis Customer Service at service@pyxis-
lab.com

Pyxis LT-63X Series User Manual [e-mail] | [phone]
1.4 Standard Accessories
The following accessories are included in the LT-63x sensor package.
LT-631 (P/N 53249) or LT-632 (P/N 53250) or LT-633 (P/N 10002) sensor will include the following:
•One bulkhead terminated cable w/8-Pin Female Adapter (33 feet / 10m)
•One MA-1.5CR Flying Lead Cable w/8-Pin Male Adapter/Flying Lead (4.9 feet / 1.5m)
•One MA-CR Bluetooth / USB Adapter
•The full instrument manual is available for download at www.pyxis-lab.com/shop/
Figure 2 - LT-63X Series Sensor with 10m Terminated Cable + 1.5m Flying Lead Cable (MA-1.5CR) + MA-CR Bluetooth/USB Adapter
1.5 Optional Accessories
The following optional accessories can be purchased [email protected] or www.pyxis-lab.com/shop/
Accessory Name
Item Number
LT-63x Replacement Wiper Blade/Arm Assembly Kit
(Includes 5 sets of Wiper Blade with Arm)
50700-A50
MA-CR
(Bluetooth Adapter/Display For use with Pyxis 8-Pin Sensors)
MA-CR
MA-120-B Fixed Submersion Adapter Bracket
(Submersed Fixed Installation Mounting Bracket)
50783
MA-50CR
(50’ Extension Cable w/8Pin Adapters)
50743
MA-100CR
(100’ Extension Cable w/8Pin Adapters)
50744
Formazin Turbidity Calibration Standard –100 NTU
(4,000 mL)
57010-100L
Formazin Turbidity Calibration Standard –500 NTU
(4,000 mL)
57010-500L
Formazin Turbidity Calibration Standard –1,000 NTU
(4,000 mL)
57010-1000L

Pyxis LT-63X Series User Manual [e-mail] | [phone]
2Quick 4-20mA Start
Follow the wiring table below to connect the LT-63x series sensor to a controller or PLC. *NOTE* All Pyxis
sensors provide a passive 4-20mA output signal, they are NOT LOOP POWERED. 24VDC+ power supply
and 4-20mA+ signal are independent of each other in all Pyxis Lab sensors.
Wire Color
Designation
Brown
Power GND
Green
RS-485 C
Yellow
RS-485 B
Gray*
4-20mA -
(Internally connected to power ground)
Pink
Not Used
Blue
RS-485 A
White
4-20mA + (Turbidity NTU)
Red
24V+
Silver
PE
*NOTE* The 24V- power ground (brown) and the 4-20 mA- (gray) return are internally connected. If the
24V- power ground and the 4-20 mA return in the controller are internally connected (non-isolated 4-20mA
input), it is unnecessary to connect the 4-20 mA- (gray wire) to the 4-20 mA negative terminal in the
controller. If a separate DC power supplier other than that from the controller is used, make sure that the
output from the power supply is rated for 22-26 VDC @ 250mA.
Please refer to the table below for proper LT-63X output 4-20mA scaling in your receiving display,
controller or PLC.
LT-63x Series Output Scaling (4-20mA)
mA
LT-631
LT-632
LT-633
4
0 NTU
0 NTU
0 NTU
20
500 NTU
1000 NTU
4000 NTU

Pyxis LT-63X Series User Manual [e-mail] | [phone]
3Installation
Submersed Fixed Installation with MA-120-B: The LT-63X series sensor may be installed in a
submersed/fixed application using the MA-120-B Submersion Adapter Mounting Bracket (P/N: 50783).
The LT-63X series sensor should be installed as outlined in and 3A. For installation, the MA-120-B bracket
should permanently mounted in a fixed position for easy access to the LT-63X series sensor and piping.
For sensor replacement and maintenance, users only need to lift (vertically/upwards) the sliding block and
conduit with the mounted sensor from MA-120-B bracket. *NOTE* The LT-63X series sensor should be
installed with a minimum distance of >15cm from the bottom of water vessel to the lens of the sensor and
a minimum of >10cm from the vessel wall on all sides. Please note the LT-63X series outer diameter is ¾ -
inch NPT. A ¾ to 1-inch NPT bushing is required for installation.
Figure 3 –MA-120-B Submersion Adapter Mounting Bracket
Figure 3A - Installation Using MA-120-B Submersion Bracket with Piping
LT-63X series (¾-inch MNPT)
SS-304 Pipe (1-inch NPT)
Reducing Coupler (1-inch to ¾-inch FNPT)
MA-120-B

Pyxis LT-63X Series User Manual [e-mail] | [phone]
Submersed Installation with Lifting Ring: The LT-63X series sensor comes equipped with a lifting ring which
allows the sensor to be lifted and lowered using a user provided chain or cable. For this method of
installation and use, please refer to
Figure . For sensor replacement and maintenance, users only need to lift the chain or cable and LT-63X
series sensor vertically (upwards).
Figure 4 - Submersed Installation Using the Lifting Ring
*NOTE* The LT-63X series sensor should be installed with a minimum distance of >15cm from the bottom
of water vessel to the lens of the sensor and a minimum of >10cm from the vessel wall on all sides.
Reference ID
Name
1
Retention Chain / Cable
2
Sensor Output Cable
3
LT-63X Series Turbidity Sensor
3
1
2
Lifting Ring
Vessel
Bottom

Pyxis LT-63X Series User Manual [e-mail] | [phone]
4Calibration and Diagnosis
The LT-63X series sensor is rigorously calibrated before leaving the factory. As
such, users do not need to calibrate the sensor for a period of one year if the
sensor is maintained clean. Users can however calibrate the sensor according
to their needs and as desired using the MA-CR Bluetooth adapter and uPyxis
APP for mobile or desktop devices. Likewise, the LT-63X series may also be
calibrated after cleaning via PLC or controller through 4-20mA communication.
4.1 Calibration and Diagnosis by uPyxis Mobile APP
Connect and power the LT-63X series sensor to a display, controller or PLC. Insert the Pyxis MA-CR
Bluetooth adapter (P/N: MA-CR) as shown in the following connection diagram, using the 8-pin adapters
on the provided sensor cables. (Figure ). The power should be sourced from a 24 VDC power terminal of
the connected display, controller or PLC. If a controller is not available, the LT-63X may also be powered
via any 22-26 VDC power supply capable of 6W, that can directly connect to the LT-63X series sensor with
provided connection cables from Pyxis. *NOTE* The MA-CR provides a micro-display for local visibility of
the sensor reading and mA value output.
Figure 5 - LT-63X Series Sensor and MA-CR Bluetooth Adapter Powered By Connected Display, Controller or PLC
Download and install the uPyxis APP from Apple Store or Google Play per the QR codes provided in the
image above. Be sure to turn on Bluetooth in the mobile device (please do not pair the device Bluetooth
to any Pyxis device, the uPyxis APP will do the pairing). Open the uPyxis APP in the mobile device. Finger
swipe the screen downward to refresh the screen and scan for the available Pyxis Bluetooth devices. The
discovered devices will be listed (see Figure 6).

Pyxis LT-63X Series User Manual [e-mail] | [phone]
Figure 6 Figure 7
Tap the discovered LT-63X series sensor to connect to it via Bluetooth. The uPyxis APP can identify the
sensor type if multiple Pyxis sensors are discovered in the scan.
4.1.1 Calibration
As shown in Figure7, When connected, the uPyxis® Mobile App will default to the Calibration screen. Four
functional tabs are available in this page: Deionized Water Calibration, Mid-Range Calibration, High-Range
Calibration and Restore to Factory. The sensor can be calibration with Pyxis Formazin calibration standards
or field water samples. Please refer to the following table for the recommended turbidity standard
solution for each range:
Calibration Range
LT-631
LT-632
LT-633*
Near Zero/Low
Bubble-free DI or sample < 1NTU
Mid-low
20–120 NTU
20–120 NTU
50-200 NTU
Mid
450-550 NTU
Mid-High
800-1200 NTU
High
200-500 NTU
200–1000 NTU
1500-4000 NTU
*Note* (1) The uPyxis® program provides 5-point calibration for the LT-633 sensor.
(2) The LT-63X series sensor should be calibrated with a minimum distance of >15cm from the bottom of
water container to the lens of the sensor and a minimum of >10cm from the vessel wall on all sides(as
shown in Figure4).

Pyxis LT-63X Series User Manual [e-mail] | [phone]
4.1.1.1 Deionized Water Calibration
1. Remove the LT-63X series sensor and rinse it thoroughly with deionized water. Repeat this rinse
process three times. Wipe the sensor with a dust-free cloth or paper-towel to confirm that the sensor
is free of obvious impurities.
2. Insert the sensor into a oversized beaker or bucket(as shown in Figure4). Add bubble-free deionized
water or water with <1.0NTU of turbidity container and wait for the sensor reading to stabilize.
3. Click the “Deionized Water Calibration” button after the reading stabilizes.
4. If the calibration is successful, the interface will return a message "Calibration Succeeded" as shown
in Figure 9. If the calibration has failed, the interface will return a message "Calibration Failed", as
shown in Figure 10 and the user must repeat the process until calibration success is achieved.
Figure 8 Figure 9 Figure 10
4.1.1.2 Mid-Range Calibration
1. Conduct the Deionized Water Calibration steps above.
2. Remove and insert the LT-63X series sensor into a clean and dry oversized beaker or bucket (as shown
in Figure4) and add the midpoint calibration solution (Please refer to the table in the previous section
for the midpoint turbidity calibration range).
3. Wait until the reading stabilizes and then click the Midpoint Calibration button to calibrate the
midpoint to the value of the standard utilized, as shown in Figure 11.
4. If the calibration is successful, the interface will return a message "Calibration Succeeded". If the
calibration has failed, the interface will return a message "Calibration Failed" and the user must
repeat the process until calibration success is achieved.

Pyxis LT-63X Series User Manual [e-mail] | [phone]
4.1.1.3 High-Range Calibration
If the high range calibration is not required, the user does not need to calibrate the high range. To continue
with the high range calibration , use the following step:
1. Conduct the Mid-Range Calibration steps above.
2. Remove and insert the LT-63X series sensor into a clean and dry beaker and inject the High Point
calibration solution(Please refer to the table in the previous section for the highpoint turbidity
calibration range).
3. Wait until the reading stabilizes and then click the High Point Calibration button to calibrate the
highpoint to the value of the standard utilized, as in Figure 12.
4. If the calibration is successful, the interface will return a message "Calibration Succeeded". If the
calibration has failed, the interface will return a message "Calibration Failed" and the user must
repeat the process until calibration success is achieved.
Figure 11 Figure 12
Trouble Shooting Steps for Failed Calibration Messages
oThe Deionized water has not been contaminated.
oThe standard solution is accurately pre-measured to verify turbidity.
oThe sensor is clean and not contaminated with debris or other materials.

Pyxis LT-63X Series User Manual [e-mail] | [phone]
4.1.2 Restore to Factory Calibration Settings
Restore To Factory Calibration Settings –If user wants to restore the sensor calibration to factory default
parameters, as shown in Figure13, click the OK option to confirm. If the restoration is successful, the
interface will return a message "Restore Succeed" (Figure 14).
Figure13 Figure14

Pyxis LT-63X Series User Manual [e-mail] | [phone]
4.1.3 Diagnosis
Tap Diagnosis in the bottom of the APP page to launch the diagnosis page (Figure 15).
Figure 15 - Select Diagnosis for Sensor
Export/Upload Sensor Diagnosis Data - In this page, the raw data measured by the sensor is displayed. To
help troubleshooting possible issues with the sensor, please save images of these data when the sensor
is respectively placed in a clean water (tap water or deionized water), in a known Formazin Turbidity
Calibration Standard Solution and/or in the sample that the sensor is intended for. This data may be
exported from the uPyxis APP via email to [email protected]m for technical support.

Pyxis LT-63X Series User Manual [e-mail] | [phone]
4.1.4 Cleaning Period Adjustment
Tap Device info in the bottom of the uPyxis APP page to launch the Device info page (Figure 16 ). You can
set the Device Name, Product Name, Modbus Address and Brush Setting for the LT-63X series sensor.
Press Brush Once to activate the wiper arm manually. Be sure to press Apply Settings to save any changes.
Figure 16 - Cleaning Period Adjustment

Pyxis LT-63X Series User Manual [e-mail] | [phone]
4.2 Calibration and Diagnosis by uPyxis Desktop APP
1) Download and install uPyxis Desktop APP from
https://upyxis.pyxis-lab.com.cn/release/pc/uPyxis.Setup-latest.zip
2) Connect a USB Type-C cable to the port at the bottom of the MA-CR and to the USB port of the laptop
or computer. This will provide power to the MA-CR from the laptop/computer. Connect the MA-CR to
the LT-63x series sensor. The MA-CR Bluetooth adapter will boost the 5V of the regular USB to 24V to
power the sensor for use with uPyxis Desktop.
Figure 12 –MA-CR Connected to Sensor & Laptop
3) Set the MA-CR to operate in USB Mode by following the steps below.
a. Once the MA-CR screen is powered Press or until you arrive at (USB to RS485) screen.
b. Press the Button.
c. Follow Prompts below to Enable USB feature. Once enabled, you may connect to uPyxis.
MA-CR Bluetooth Adapter –Bottom USB-C
Port

Pyxis LT-63X Series User Manual [e-mail] | [phone]
4) Open the desktop uPyxis APP.
5) Click Device to launch the connection option menu.
6) Select Connect via USB-RS485 (Figure 18).
7) Select the Comm Port to make a connection. Normally only one Comm port is
identified by uPyxis (Figure 19). If more than one Comm port listed in the selection
dropdown, you may try to select each one to see if a connection can be made.
Alternatively, you may use the Windows Device Manager to identify the Comm Port
that the Pyxis USB adapter is using.
After the connection is established, the LT-63X Series sensor series number and current turbidity
concentration reading of the water will be displayed on the left of the information page (Figure 20 ).
In this page, you can set the Device Name, Product Name, Modbus Address and Brush Setting for
the device.
Figure 18 - Connection Options

Pyxis LT-63X Series User Manual [e-mail] | [phone]
Figure 19 - Select a Comm Port
Figure 20 - Connected to a LT-63X series sensor and information page

Pyxis LT-63X Series User Manual [e-mail] | [phone]
4.2.1 Calibration
To calibration the sensor , click on Calibration. On the Calibration screen, there are three calibration
buttons, Deionized Water Calibration, Mid-Range Calibration, High-Range Calibration. The screen also
displays the reading of the device. The reading refresh rate is every 4 seconds.
Figure 21 - Calibration Page
The calibration solution can be process water of the application itself or users may also use Pyxis Formazin
calibration standard solution. Please refer to the following table for the recommended turbidity standard
solution for each range:
Calibration Range
LT-631
LT-632
LT-633*
Near Zero/Low
Bubble-free DI or sample < 1NTU
Mid-low
20–120 NTU
20–120 NTU
50-200 NTU
Mid
450-550 NTU
Mid-High
800-1200 NTU
High
200-500 NTU
200–1000 NTU
1500-4000 NTU
*NOTE* :(1) The uPyxis program provides 5-point calibration for the LT-633 sensor.
(2) The LT-63X series sensor should be calibrated with a minimum distance of >15cm from the bottom of
water container to the lens of the sensor and a minimum of >10cm from the vessel wall on all sides(as
shown in Figure4).