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Summary of Contents for Pyxis CR-301
- Page 2 CR-301 Corrosion Rate Sensor User Manual April 15, 2021 Rev. 1.01 Pyxis Lab, Inc. 1729 Majestic Dr. Suite 5 Lafayette, CO 80026 USA www.pyxis-lab.com © 2017 Pyxis Lab, Inc. Pyxis Lab Proprietary and Confidential...
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Page 3: Table Of Contents
Table of Contents 1 Introduction 1.1 Features ..........1.2 uPyxis APP Configuration . - Page 4 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).
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Page 5: Introduction
The propor- tional constant B has a theoretical value for a given metal type and size. The CR-301 assumes B equal to 1.24 MPY∙Ω for a 5 cm mild steel electrode, which is a typical value that has been used in many LPR cor- rosion researches. -
Page 6: Features
When used with the provided MA-CR Pyxis Bluetooth Adapter, the CR-301 must be configured via the uP- yxis APP for Mobile or Desktop devices. The uPyxis app is used to configure the CR-301 for the metallurgy desired, assign a sensor identification name, obtain live sensor readings. Default measurement ranges and alloy factors will be applied to the CR-301 via the uPyxis APP when the user selects the metallurgy desired. -
Page 7: Specifications
2 Specifications Table 1. CR-301 Specifications Item CR-301 51021 General Corrosion Range - MPY 0.001–995 (4–20mA Output) (Default Assigned MPY is Customizable Via uPyxis) Resolution 0.001 MPY or 1% of Reading Localized Corrosion Range — Index 0.001–100 (4–20mA Output) (Default Assigned Index is Customizable Via uPyxis) Conductivity Compensation 10–50,000uS/cm... -
Page 8: Unpacking The Instrument
3.1 Standard Accessories 3.1.1 CR-301 - Wired / 24VDC LPR Corrosion Sensor Package (P/N 51021) • The package should include one CR-301 sensor, a 5-foot extension cable terminated with connectors, a 2-foot flying lead cable with one end terminated with a connector •... -
Page 9: Installation
The sensor probe shall be inserted into a pipe via a 3/4 - inch threaded tee. The corrosion rate measured by the CR-301 sensor may be affected by the position of the two-test metal electrodes in relation to the water flow. The electrodes should be fully immersed in the water sample and away from any turbulence. -
Page 10: Wiring
APP. The user may alter the 4–20 mA output from the CR-301 to a desired corrosion rate in the unit of MPY by setting up one of three configurable parameters. The configurable parameters include 1) alloy factor, 2) the sensor’s 4–20 mA range and 3) the controller’s 4–20 mA range. - Page 11 See below for wiring illustrations of the CR-301 sensor to several common controllers. Figure 4. Typical wiring for WalChem W600 Figure 5. Typical wiring for WalChem W900 (4-wire loop configuration) CR-301 User Manual service@pyxis-lab.com | +1 (866) 203-8397...
- Page 12 Figure 6. Typical wiring for WalChem WebMaster One Figure 7. Typical wiring for Advantage Controls MegaTron SS NOTE To get a Pitting signal, a jumper wire is needed from 4–20mA Input 2- to power -24V. CR-301 User Manual service@pyxis-lab.com | +1 (866) 203-8397...
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Page 13: Connecting Via Bluetooth
Mobile App or a computer with the uPyxis® Desktop App. The power should be sourced from a 24 VDC power terminal of a controller. If a controller is not available, the user may also use Pyxis PowerPACK-1 or PowerPACK-4 as an alternative to both an external power supply and a Bluetooth adapter. PowerPACK from Pyxis Lab offers external power, Input/Output signal, and Bluetooth connectivity. -
Page 14: Instrument Overview
5 Instrument Overview 5.1 Test Metal Electrodes Pyxis provides 5-cm (0.736 square inch) metal electrodes, commonly used in the LPR corrosion measure- ment applications. The common names, UNS codes, and alloy factors are listed the table below. Figure 10. Test Metal Electrode Dimensions, Inch [mm] CR-301 User Manual service@pyxis-lab.com... - Page 15 Metal electrodes with a different length and a slightly different diameter may be used with the CR-301 sensor if the electrodes have a 4-40 internal thread and has a surface are of 5 cm . The alloy factor for a given metal alloy is proportional to the surface area of the electrode.
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Page 16: Default Sensor Settings
5.3 Confirm 4–20mA Output to MPY using the Calibration Check Caps The CR-301 is provided with one 2.0 MPY and one 0.1 MPY- calibration check/verification caps. These caps are designed to generate a known MPY value when connected to the uPyxis APP and when the sensor is configured with the uPyxis Default Settings assigned. -
Page 17: Setup And Calibration With Upyxis® Mobile App
6 Setup and Calibration with uPyxis® Mobile App The default configuration of the CR-301 sensor before shipping is to measure the corrosion rate of mild steel. The alloy factor was set to be the theoretical value of iron. The sensor can be configured for other metals with appropriate alloy factors and the 4–20mA scale settings for general and localized corrosion... -
Page 18: Connecting To Upyxis® Mobile App
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 CR-301 and its Serial Number (SN) will be displayed (Figure 13). 4. Press on the CR-301 sensor image. -
Page 19: Reading Screen
When connected, the uPyxis® Mobile App will default to the Reading screen. From the Reading screen, you can perform a calibration by pressing on Slope Calibration. Follow the screen instructions for each calibration step. Figure 14. CR-301 User Manual service@pyxis-lab.com | +1 (866) 203-8397... -
Page 20: Setting Screen
From the Setting screen, you can set the Reading Interval, the Metal Selection, the corrosion MPY value for 20 mA, the pitting value for 20 mA, two smoothing factors, and a password for the device. Be sure to press Apply Settings to save any changes. Figure 15. CR-301 User Manual service@pyxis-lab.com | +1 (866) 203-8397... -
Page 21: Setup And Calibration With Upyxis® Desktop App
7 Setup and Calibration with uPyxis® Desktop App The default configuration of the CR-301 sensor before shipping is to measure the corrosion rate of mild steel. The alloy factor was set to be the theoretical value of iron. The sensor can be configured for other metals with appropriate alloy factors and the 4–20mA scale settings for general and localized corrosion... -
Page 22: Connecting To Upyxis® Desktop App
3. On uPyxis® Desktop App, click Device Connect via USB-Bluetooth (Figure 17). 4. If the connection is successful, the CR-301 and its Serial Number (SN) will be displayed in the left 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. -
Page 23: Information Screen
Modbus Address, then click Apply Settings to save. Figure 18. 7.4 Reading Screen From the Reading Screen, you can view the current corrosion and pitting data as well as the trend data. Figure 19. CR-301 User Manual service@pyxis-lab.com | +1 (866) 203-8397... -
Page 24: Setting Screen
4–20mA scale for both general and localized corrosion. User may adjust as desired. 8.2 Communication using Modbus RTU The CR-301 can be configured as a Modbus slave device. In addition to the general corrosion rate and lo- calized corrosion index, many operational parameters, including warning and error messages, are available via a Modbus RTU connection. -
Page 25: Regulatory Approval
10 Regulatory Approval United States The CR-301 sensor has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
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