Pyxis PRISM RT-100 User manual

Table of Contents
1 Introduction................................................................................................................... 2
1.1 Main Features............................................................................................................. 2
2 Specifications ................................................................................................................ 3
3 Unpacking Instrument .................................................................................................. 4
3.1 Standard Accessories.................................................................................................. 4
3.2 Optional Accessories................................................................................................... 5
4 Installation..................................................................................................................... 5
4.1 Main Assembly............................................................................................................ 5
4.2 Piping .......................................................................................................................... 6
4.3 Wiring ......................................................................................................................... 7
4.4 Connecting via Bluetooth ........................................................................................... 8
5 Instrument Overview.................................................................................................... 9
5.1 Key Functions.............................................................................................................. 9
5.2 Measurement Modes ............................................................................................... 10
5.3 Sensitivity Setup........................................................................................................ 10
5.4 Cleaning Cycle Programming and Reset of Parameters ........................................... 11
6 Calibration................................................................................................................... 12
6.1 Air Calibration of Refractive Index............................................................................ 12
6.2 Brix and Other Liquid Concentration Offset Calibration .......................................... 13
7 Setup and Configuration with uPyxis® Mobile App................................................... 13
7.1 Download uPyxis® Mobile App................................................................................. 13
7.2 Connecting to uPyxis® Mobile App .......................................................................... 14
7.3 Calibration Screen and Reading................................................................................ 15
7.4 Diagnosis Screen....................................................................................................... 16
7.5 Device Info Screen .................................................................................................... 17
8 Setup and Calibration with uPyxis® Desktop App ..................................................... 17
8.1 Install uPyxis® Desktop App ..................................................................................... 17
8.2 Connecting to uPyxis® Desktop App ........................................................................ 18
8.3 Information Screen................................................................................................... 19

8.4 Calibration Screen..................................................................................................... 20
8.5 Diagnosis Screen....................................................................................................... 21
9 Outputs........................................................................................................................ 21
9.1 4–20mA Output Setup.............................................................................................. 21
9.2 Communication using Modbus RTU ......................................................................... 22
10 Sensor Maintenance and Precaution ....................................................................... 23
10.1 Methods to Cleaning the Prism RT-100.................................................................. 23
11 Contact Us ................................................................................................................. 23

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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
instances, 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 ofdelivery. 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
incorporation 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://pyxis-lab.com/request-tech-support/.
Pyxis Technical Support
Contact Pyxis Technical Support at [phone], [e-mail], or by filling out a request
for support at https://pyxis-lab.com/request-tech-support/.

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1Introduction
The Pyxis Prism RT-100 is an online digital refractometer that measures the refractive index of a liquid
sample. This sensor provides a direct reading of highly accurate concentration values for a wide variety of
water and process related applications. It is a stand-alone device capable of self-sustained operation, live
data display, and data logging. The Prism RT-100 also offers fully integrated 4-20mA and RS-485 Modbus
output signals for connectivity to any microprocessor-based controller, display, PLC, or DCS network. The
Prism RT-100 has built-in temperature-dependent equations to convert the measured sample
temperature and refractive index to the percentage concentration of Mono Ethylene Glycol (MEG), Mono
Propylene Glycol (MPG), Sugar Content (Brix) and Advanced Low Viscosity Fluid (ALV).
*NOTE* The Prism RT-100 is a very robust sensor and capable of operating in
contaminated fluid samples. It is important, however, to note that users should take
all precautions to prevent and filter suspended solids from the sample stream prior to
the sensor to avoid tenacious deposit build-up on the sensor eye. In highly fouled
applications, Pyxis recommends users conduct sensor eye cleaning on a regular basis.
Pyxis Lab offers the Ultra-Sonic RT-Series Cleaning Module Kit (P/N 56208) for
installation into the Tri-Clamp Flow Cell Assembly as an optional accessory allowing
for automated online cleaning of the RT-100 refractive index sensor. Contact
[e-mail] for technical and pricing details of this online cleaning
accessory.
1.1 Main Features
•4-20mA output of sample temperature and the displayed unit selected via the screen interface.
•RS-485 Modbus RTU output of temperature, refractive index and other diagnosis parameters.
•Built-in temperature dependent equations % BRIX, % MPG, % PEG, % ALV, %ALV+ and %GEO.
•Local display and historical data log saved in the unit programmable via uPyxis® App.
•Sturdy 316L stainless steel construction and suitable for harsh application environments.
•Convenient stainless-steel Tri-Clamp Tee with 3/4-inch NPT Flange for Easy Install and Removal.

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2Specifications
Table 1. Prism RT-100 Specifications
ITEM
RT-100 PRISM
P/N
55105
RANGE
OF
MEASUREMENT
Refractive Index: 1.31700 – 1.5100
Brix: 0.00 – 85.00%
Mono Ethylene Glycol: 0.00 – 100.00%
Mono Propylene Glycol: 0.00 – 100.00%
Advanced Low Viscosity Fluid: 0.00 – 100.00%
Temperature: -20oC – 80oC
RESOLUTION
Refractive Index: 0.00001
Brix and Glycol: 0.01%
ACCURACY
Refractive Index: ±0.0001
Brix and Glycol: ±0.1%
SAMPLE TEMPERATURE
-4 – 158 oF (-20 – 70 oC)
MAX SAMPLE PRESSURE /
FLOW
<142 psi (0.98 MPa) / <13.5 GPM (9.8 ft/s)
ENVIRONMENTAL
TEMPERATURE
14 – 104 oF (-10 – 40 oC)
WEIGHT
3.7 pound (1.7 kg)
DIMENSION
4.33 x 4.57 inch (110 x 116 mm)
PROTECTION
IP-67
LIGHT SOURCE
LED
WET MATERIALS
Sapphire, 316L Stainless steel
SIGNAL OUTPUT
2x 4-20 mA and RS-485 Modbus
POWER
24 VDC (1.5W)
REGULATION
CE / RoHS Marked
* With Pyxis’s continuous improvement policy, these specifications are subject to change without notice.

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3Unpacking 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 servic[email protected].
3.1 Standard Accessories
RT-100 Prism Package (P/N 55105)
•The package should include one RT-100 Prism Refractive Index Sensor w/8Pin Female Cable
•One 316L Stainless Steel Tri-Clamp Flow Cell Assembly (P/N 56206)
•One MA-1.5CR Cable (1.5 Meter/ 4.9 ft 8Pin Male Adapter/Flying Lead) (P/N 50746)
•One Prism RT-Series Wall Outlet Power Supply Kit (110VAC/24VDC –2Pin) (P/N 56207)
Figure 1. RT-100 Prism / Tri-Clamp Flow Cell Assembly / MA-1.5 Flying Lead Cable / 110VAC-24VDC Power Supply
Tri-Clamp Flow Assembly Side Diagram

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3.2 Optional Accessories
The following optional accessories can be ordered from Pyxis Customer Service ([e-mail]) or
Pyxis E-Store at https://pyxis-lab.com/shop/.
Table 2. Optional Accessories
Optional / Replacement Accessories
Part
Number
(P/N)
Prism RT-Series Wall Outlet Power Supply Adapter Kit
(Plug In Power Supply Kit - Converts Wall Outlet 110VAC to 24VDC for Prism RT-100 —2-Pin)
56207
MA-CR
(Bluetooth Adapter for 8-Pin Pyxis Sensors for use with uPyxis Mobile & Desktop)
MA-CR
MA-NEB
(USB Bluetooth Adapter for PC to use uPyxis Desktop)
MA-NEB
MA-50CR (50’ Extension Cable w/ 8-Pin Adapter)
50743
Pyxis Probe Cleaning Kit
SER-01
Tri-Clamp Flow Cell Assembly Complete Replacement
56206
Tri-Clamp Flow Cell Assembly Replacement Gasket Kit
56209
Ultra-Sonic RT-Series Cleaning Module Kit
56208
4Installation
4.1 Main Assembly
Figure 2. Prism RT-100 Sensor Dimensions (mm)
Each Prism RT-100 is provided with a 316L stainless steel Tri-Clamp Inline Flow Assembly with 3/4-inch
FNPT inlet/outlet flanges. A flange and plug are also inserted into a portal opposite of the sensor eye for
future automated sensor-eye cleaning accessories currently under development by Pyxis Lab.

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2
5
4
6
3
2
3
1
7
54
Figure 3. Tri-Clamp Flow Cell Assembly (P/N: 56206)
Table 3. Tri-Clamp Flow Cell Assembly Components
ID #
Description
1
Flow cell with 2.5-inch Port for Prism RT-100 Sensor
Head
2
Sensor Tri-Clamp 2.5-inch
3, 4
Tri-Clamp Flow Cell Gasket Kit (P/N: 56209)
5
3/4-inch NPT Flange
6
Flange Tri-Clamp 2-inch
7
Plug Cap φ 64mm,Reserved Self-cleaning
4.2 Piping
The Prism RT-100 with Tri-Clamp Flow Cell Assembly should be installed per the diagram provided in Figure
4. Be sure to avoid installations illustrated in Figure 5.
Figure 4. Correct Installations

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Figure 5. Incorrect Installations
4.3 Wiring
The Prism RT-100 unit offers two (2) cable points of attachment, both terminated with a unique connector (Figure 6).
The Prism RT-100 may be powered via a direct 24VDC supply source (via 8-Pin cable provided with the Prism RT-100) or
by the provided accessory called Prism RT-100 Wall Outlet Power Supply Adapter Kit (P/N 56207). Explanation of
each option below:
Powered by a Direct 24VDC Power Source via 8-Pin Cable Provided with Prism RT-100
For applications where the Prism RT-100 is connected to and directly powered by 24VDC source (Controller,
PLC, DCS etc.), the device should be connected via the 8-Pin Cable and MA-1.5CR Flying Lead Cable. These cables provide
power as well as 4-20mA and RS-485 output communication to the connected device. Please refer to Table 4 for wire
designations of the 8-pin cables.
Powered by a Prism RT-Series Wall Outlet Power Supply Adapter Kit
For applications desiring the Prism RT-100 to be powered by a standard 110VAC wall outlet, Pyxis offers the Prism RT-
Series Wall Outlet Power Supply Kit (P/N: 56207). This kit offers a 2-Pin cable and wall outlet
adapter for direct power supply from a standard 110VAC wall outlet. *NOTE* In the wall outlet powering format, there
is no need to terminate the power supply portion of the 8-Pin Cable. This cable may continue to be used in order to pass
4-20mA and RS-485 output signals or for use with the MA-CR Bluetooth adapter for uPyxis® App access.
Table 4. Wire Designations
* Gray Wire Internally connected to the power ground. 4-20mA is not loop powered.
Hole
Number
Wire Color Designation
8 Red 24V +
2 Brown 24V Power Ground
5 Gray* 4-20mA -
1 White nD/Brix/others %, 4-20mA +
6 Pink Temperature, 4-20mA +
7 Blue RS-485 A
4 Yellow RS-485 B
3 Green RS-485 Ground

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Figure 6. Prism RT-100 with Wall Outlet Supply Adapter Kit (P/N: 56207) and MA-1.5CR Flying Lead Cable (P/N: 50746)
4.4 Connecting via Bluetooth
Connect the Prism RT-100 to the Pyxis MA-CR Bluetooth adapter and a 24 VDC power source according to
the figures below. Figure 7 shows that the Prism RT-100 is powered by a controller through the 8-Pin cable
provided with the Prism RT-100. Figure 8 shows the Prism RT-100 is powered by the Prism RT-Series Wall
Outlet Power Supply Adapter (P/N: 56207) through the 2-Pin cable.
*NOTE*uPyxis®Mobile allows mobile devices to wirelessly speak directly to the MA-CR Bluetooth
Adapter. uPyxis® Desktop requires MA-NEB (USB Bluetooth adapter) to be installed in the PC for
wireless access to MA-CR.

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Figure 7. 24VDC Powered via Controller through 8-Pin Cable and MA-CR Bluetooth Adapter
Figure 8. 24VDC Powered via 110VAC Wall Outlet through Prism RT-100 Wall Outlet Power Supply Adapter (P/N: 56207)
5Instrument Overview
5.1 Key Functions
Figure 9. Prism RT-100 Main Display Screen
Table 5. Prism RT-100 Key Functions
Key
Function Description
MODE
Launch setup function associated with the current mode
↑ and ↓
Select measurement modes (units); select available selections
associated
OK
Selection confirmation, (Press 3S to set the HOME 🏠display)

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5.2 Measurement Modes
The Prism RT-100 measures the sample refractive index (nD) and temperature. Use the arrow keys to
select the concentration units that are calculated from nD and the temperatures with using the pre-loaded
equations for Brix, MPG, MEG, and ALV, etc. The main output of 4-20mA signal value switches with the
display concentration selected per the 4-20mA output scales section 9.1 of this manual.
Figure 10. nD Figure 11. MEG % Figure 12. MPG %
Figure 13. ALV % Figure 14. Brix % Figure 15. GEO %
5.3 Sensitivity Setup
A higher sensitivity value set will result in a slower sensor response and the displayed value with show less
fluctuation. For applications that require very accurate refractive index measurement, and the refractive
index does not undergo any rapid changes in the time scale of minutes, the sensitivity should be set up to
the highest value of 30.
Figure 16.- Sensitivity

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5.4 Cleaning Cycle Setup
RT-100 supports an extended ultrasonic cleaning function using the Ultra-Sonic RT-Series Cleaning
Module Kit (P/N 56208). When working in synchronization with the RT-Series Ultrasonic Cleaning Module,
the working cleaning cycle is set by RT-100 in increments of every 5, 15 or 30 minutes for a cleaning
duration of 5-seconds per cycle. The RT-100 default programmed cleaning time is every 15-minutes. For
pricing, technical data and programming of the Ultra-Sonic Cleaning Module Kit, please contact
[email protected]m
Figure 17. –Programming the Clean Cycle Frequency
5.5 Reset Parameters
This mode will erase the user’s calibration and setting information, restore the factory calibration and
setting information, including air calibration, brix/liquid concentration offset calibration, sensitivity, etc.
Figure 18. Figure 19.

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6Calibration
Calibration for refractive index is not required for the RT-100 use. The Prism RT-100 can however be
calibrated in air to correct possible misalignment and aging of the optic components. An offset calibration
for each concentration unit is provided by using a liquid sample with known concentration value.
6.1 Air Calibration of Refractive Index
1. Clean the Prism RT-100 sapphire lens with soft tissue.
2. If any tenacious deposits are present on the sensor lens, you may pre-soak the sensor lens in Pyxis
Probe Cleaning Solution (P/N: SER-01) for 10–15 minutes, then rinse with clean water and wipe with
soft tissue prior to proceeding to air calibration of refractive index.
*NOTE* Please refer to the Section 10.1 Methods to Cleaning the Prism RT-100 for details.
3. After properly cleaning the sensor lens, remove any residual liquid from the sapphire lens.
4. Shield the lens from the ambient light.
5. Press the MODE key on the face of the unit to launch the air calibration interface (Figure 20).
6. Hold the OK key on the face of the unit for 3 seconds to start the air calibration process (Figure 21).
7. Once the calibration is complete, press the MODE key to return to measurement mode (Figure 22).
Figure 20. Figure 21. Figure 22.

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6.2 Brix and Other Liquid Concentration Offset Calibration
The refractive index value does not require calibration as stated in Section 6.1. The refractive index and
temperature values are internally converted to the desired liquid concentration unit selected through the
display of the sensor interface. This displayed liquid concentration unit value may be calibrated to a known
solution if desired. To do this:
1. Place the Prism RT-100 in the calibration liquid of a known concentration making sure the sensor is
covered from ambient light.
2. Use the arrow keys on the sensor display to select the corresponding concentration unit of your
sample.
3. Press the MODE key on the sensor display to launch the offset calibration interface for the specific
concentration unit selected.
4. Proceed through the screen prompt steps to calibrate unit to the known concentration of liquid
standard.
Figure 23.
7Setup and Configuration with uPyxis® Mobile App
7.1 Download uPyxis® Mobile App
Download uPyxis® Mobile App from Apple App Store or Google Play.
Figure 24.uPyxis® Mobile App installation

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7.2 Connecting to uPyxis® Mobile App
Connect the Prism RT-100 sensor to a mobile smart phone according to the following steps:
1. Install the MA-CR Bluetooth Adapter on the 8Pin output cable from the RT-
100 as outlined on page 8-9 as seen in Figure 7 (if powered by a controller)
or Figure 8 (if powered by the RT-100 Wall Outlet Power Adapter).
2. Open uPyxis® Mobile App.
3. On uPyxis® Mobile App, swipe down with finger on the main screen to refresh the list of available
Pyxis devices.
4. If the connection is successful, the Prism RT-100 and its Serial Number (SN) will be displayed (Figure
25).
5. Press on the Prism RT-100 sensor image.
Figure 25.–Discovered RT-100 on uPyxis Mobile APP

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7.3 Calibration Screen and Reading
When connected, the uPyxis® Mobile App will default to the Calibration screen. From the Calibration
screen, the user can perform the various forms of calibrations as discussed in this manual (see Sections
6.1 and 6.2) by pressing on Air Calibration and Bias Calibration (Offset Calibration). The calibration
objective is determined by the drop-down box selected. Follow the screen instructions for each calibration
step.
The user may also perform a factory reset of all calibration values saved in the device by pressing Restore
Factory and entering ”upyxis” into the prompt.
Setting 4-20mA Range The 4-20mA output range for any concentration scale may be modified by the user,
if the default range is not suitable for you. This feature enables the user to adjust the 4-20mA output
values of the RT-100 for the concentration curve as desired. *NOTE* 20mA value adjustment must be LESS
than the highest default 20mA output value of the concentration selected. (i.e.. for BRIX concentration, the
20mA value may be set to 100% or lower). Please refer to Section 9.1 for default 4-20mA output scales of
the RT-100.
Figure 26.–Calibration Screen Interface uPyxis Mobile APP.

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7.4 Diagnosis Screen
From the Diagnosis screen, the user can check the diagnosis condition. This feature may be used for
technical support when communicating with [e-mail].
The user can choose the time period of data export, including: hour, day, week, half month, and all data
stored. After selecting the time, press Export History Data and wait for the progress bar to load.
*NOTE* The Prism RT-100 is programmed to store data at a frequency of once per minute with a
maximum of 56 days storage capacity.
The Diagnosis screen’s functions are described in table below:
Table 6. –Diagnosis Screen Functions
Function
Description
Wipe History Data
It is convenient to clear unnecessary historical data. This process is relatively slow. Do
not power off during the process.
Export Spectrum
Derive the original spectrum.
Export History Data
The historical data is exported and saved in CSV format. The storage contents include
refractive index nD, temperature °C, Brix, MEG, PEG and others.
Save & Share
Save the data and send it to other software.
Hour (Dropdown)
Select the length of time to export data. The latest hour is exported by default. Users
may select Day, Week, and Half-Month. Data can be exported for up to 56 days.
Figure 27.–Diagnosis Screen Interface and Exporting Historical Data