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Engineered Solutions for Gas Detection and
Analysis
High Purity Instruments
OPERATIONS MANUAL
Document Control Number: MN-A-0119
Manual Part Number: C5-06-4900-13-0
Revision Level: F
ECO: 7988
Phone: 610.524.8800 • Fax: 610.524.8807 • Email: info@neutronicsinc.com
MODEL N2
Date: Oct. 31, 2006
A DIVISION OF
456 Creamery Way, Exton, PA 19341
www.neutronicsinc.com
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Summary of Contents for Neutronics NTRON PureN2
- Page 1 Engineered Solutions for Gas Detection and Analysis High Purity Instruments MODEL N2 OPERATIONS MANUAL Document Control Number: MN-A-0119 Manual Part Number: C5-06-4900-13-0 Revision Level: F Date: Oct. 31, 2006 ECO: 7988 A DIVISION OF 456 Creamery Way, Exton, PA 19341 Phone: 610.524.8800 •...
- Page 2 If you have any questions or concerns while using the PureN2, please contact us. Neutronics /Ntron Customer Service Department 456 Creamery Way Exton, PA 19341 610-524-8800 610-524-8807 (f) (800)-378-2287 Toll Free (US only) info@neutronicsinc.com (email)
- Page 3 Neutronics. The parts will be repaired or replaced free of charge if shipped prepaid to the factory in the original shipping carton. This warranty is void if the product has been subject to misuse or...
- Page 4 Copyright © 2006 Neutronics Inc. This work is protected under Title 17 of the US Code and is the sole property of Neutronics Inc. No part of this document may be copied or otherwise reproduced, or stored in any electronic information retrieval system, except as specifically permitted...
- Page 5 Table of Contents Specifications Chapter 1 Basic Principles of Operation ………………………………….. Description Theoretical Basis System Components The Sensor and Sampling System Electronic/Display System Furnace/Heater Sampling System High Purity Pump Chapter 2 Installation and Start-Up ……………………………………………. Installation and Hook-up Start-Up Special Situations Chapter 3 Operation ………………………………………………………………...
- Page 6 Specifications Dimensions 14.75" High x 9" Wide x 13.55" Long (375 mm x 229 mm x 344 mm) Weight 12 lbs. (5.5 Kg) Operating Conditions Ambient Temperature: 0 to 122ºF (0 to 50ºC) Relative Humidity: 0 to 90% (Non-Condensing). Range Auto-ranging between .001 PPM to 99.9% O .
- Page 7 The Model PureN2 is a microprocessor based portable instrument intended to accurately measure oxygen in the range of 100% to 0.1 PPM. At the heart of the PureN2 is the Neutronics Industrial/Ntron exclusive Rapid Response Zirconium Oxide Sensor. Because the sensor is a solid state device, it offers many unique advantages over other sensor technologies.
- Page 9 Principles of Operation Theoretical Basis The sensor used in the PureN2 PPM Oxygen Analyzer is made of the solid state oxygen ion conducting (electrolyte) zirconium oxide. Due to oxygen vacancies in the ceramic lattice, at temperature over 450 degree Centigrade, oxygen ions are mobile in the solid material. It is this property that enables the measurement of oxygen in a gas of unknown composition.
- Page 10 System Components The four basic components in the analyzer are described below and shown schematically in Fig.# 1. Sensor The solid electrolyte (Zirconium Oxide) electrochemical sensor consists of a closed end ceramic (Zirconium Oxide) tube coated inside and outside with two porous platinum electrodes. When heated above 600 C ionic conductivity of the Zirconium Oxide becomes high enough to generate a voltage as described by the Nernst equation.
- Page 11 PureN2 PPM O ANALYZER SYSTEM CONFIGURATION SENSOR EXHAUST BYPASS EXHAUST SENSOR BYPASS CHECK VALVE FURNACE SAMPLE INPUT SAMPLE FLOWMETER PUMP VAC POWER INPUT ISOLATOR ISOLATED 4-20 mA BOARD OUTPUT (OPTIONAL) ANALOG 4-20 mA OUTPUT BOARD ANALOG mV OUTPUT POWER POWER VAC POWER FILTER SUPPLY...
- Page 12 Set selector switches on the rear of the unit to the 110 setting for 120 VAC + 20%, or the 220 setting. Internal and external switch changes are required for 220 VAC. Contact Neutronics for instructions. This analyzer has been designed for analyzing O in clean gases that contain no hydrocarbon or CO components.
- Page 13 Start-up When the instrument is connected to power and turned on, the green POWER indicator lights illuminate (main analyzer power lamp & Pump power lamp), the electronic display illuminates, and the LED display counts up to test the LED segments. The warm-up time before the instrument is operational is approximately 20 minutes.
- Page 14 CHAPTER 3 Operation Display The oxygen analyzer has a three-digit LED display for showing the temperature and oxygen content. When the display is showing oxygen content, one of the range indicators is on. When the display is showing temperature, the range indicators are off. The three digit display automatically switches to the proper range to display the oxygen concentration of the gas being measured.
- Page 15 Option Modes The PureN2 Oxygen Analyzer has several options. These options are accessed by using the OPTION key on the keypad. The user scrolls through the options by pressing the OPTION key. Options are displayed on the secondary display during scrolling. Choices are made by pressing the ENTER key when the desired option is shown on the display.
- Page 16 Communications Interface The electronics have been designed for communication with a host computer over a standard RS- 232 serial interface. The host computer can inquire about temperature, oxygen concentration, sensor voltage, and other parameters. The host computer may control analyzer electronics, via the communications interface, by turning the communications line on and off.
- Page 17 2&3 (xmtr & rcv.) may be reversed. First try reversing pins 2 & 3 on the RS - 232 cable connector. Then go back to the beginning of step #1 and try again. If the model PureN2 analyzer still does not re-boot, call the Neutronics Industrial/Ntron Service Department for further assistance.
- Page 18 CHAPTER 4 Calibration The PureN2 Oxygen Analyzer is calibrated at the factory at a flow rate of 1 liter/min. It is important to calibrate the device at your facility to compensate for atmospheric pressure variation between the point of manufacture and the end use site. After completion of the calibration sequence, the display readout will correspond to the cylinder analysis of the user's certified calibration gas.
- Page 19 STEP BY STEP CALIBRATION INSTRUCTIONS FOLLOW: Step One: Be sure that the PureN2 Oxygen Analyzer has been warmed up for approximately 20 minutes before attempting calibration. Step Two: Be sure the correct values for both Room Air and Calibration Gas are entered in the device memory.
- Page 20 CHAPTER 5 Analog output The PureN2 Oxygen Analyzer is equipped to output oxygen readings via an analog output through two sets of analog output posts on the rear panel of the unit. Available analog outputs are 0-1 VDC, and 4-20 mA .
- Page 21 levels will represent .1%. When the analyzer is in "Auto-Range" option, line 2 of the LCD display will read "Auto- Range On". The auto-range function is controlled by pressing the CLEAR key. The secondary display will toggle between "Auto-Range On" and "Auto-Range Off" indicating which mode the analog output is set to.
- Page 22 CHAPTER 6 Alarm Function Set the Two Alarm Limits The PureN2 Oxygen Analyzer has an audible alarm system which also controls contact closures for integrating this alarm function into a customer's process control system. The audible alarm sounds when the oxygen concentration goes outside the preset alarm set points. The secondary display reads "Alarms?".
- Page 23 Step 4: Press 1 to change alarm #1. Line 1 of the secondary display shows the "Alarm is Low (or high)". Line 2 shows current alarm value and instructs the user to "Press 1 to Vary High/Low, Press CLEAR to Vary On/Off, Press 2 to Change Value or Press ENTER to Accept Setup"...
- Page 24 "000". Cause: Failure of an electronic component. It is always possible for a component to fail and render the analyzer inoperable. While the Neutronics Industrial/Ntron Oxygen Analyzer has been designed with rugged components, the possibility of failure is always present.
- Page 25 ERROR CODES FOR VERSION 6.50 FIRMWARE Error conditions in the analyzer are reported in two ways. First the error is displayed on the front panel LCD and also logged in the computer's memory. The information in the memory can be retrieved via the RS232 port using the "Z" command.
- Page 26 PureN2 Spare Parts List Neutronics Industrial/Ntron Replacement Part Part Number Boards CPU Board R200P50-002 Analog Board R202P50-002 Power Supply Board R203P30-001 Display Board R206P10-001 Current Output Board R208P60-001 Sensor Sensor Replacement Kit R102P70 Sensor Mount R100P90 Purge Tube Kit R103P20...
- Page 27 Maintenance Upon At Least Every 6 Whenever the O2 As Required Commissioning Unit months Reading is Suspect ♦ ♦ ♦ ♦ Calibrate on certified span gas ♦ ♦ Set alarm points and analog output scales ♦ Replace Sensor ♦ Replace Furnace ♦...
- Page 28 REFERENCE CHART FOR USE WITH: NEUTRONICS INDUSTRIAL/NTRON ZIRCONIUM OXIDE OXYGEN ANALYZERS SENSOR VOLTAGE vs OXYGEN CONCENTRATION ACCORDING TO THE NERNST EQUATION (Within Analyzer Calibration) SENSOR VOLTAGE PERCENT POTENTIAL OXYGEN OXYGEN OXYGEN (in Mv) CONCENTRATION 20.90% 209,000 209,000,000 15.8 10.00% 100,000 100,000,000 30.7...
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