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MIXCHEK
OPERATING INSTRUCTIONS FOR
MIXCHEK
HELIUM/OXYGEN
MIXTURE ANALYZER
P/N M75030
Rev 2
ECO # 05-0138
DANGER
This instrument is designed to monitor the helium and oxygen concentrations in a gas
mixing process. When processing gas mixtures intended for breathing, the instrument
must be calibrated and functioning properly. Suffocation or other fatal respiratory
complications can result from improperly calibrated or malfunctioning equipment.
Oxygen accelerates combustion. Do not use this instrument around open flames and
combustible gases, liquids or solids.
Only authorized personnel should conduct maintenance and/or servicing. Before
conducting any maintenance or servicing, consult with authorized
supervisor/manager.
MIXCHEK Manual Rev 2 7/25/05 P/N M75030 ECO 05-0138
Teledyne Analytical Instruments
i
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Summary of Contents for Teledyne Mixchek
- Page 1 Oxygen accelerates combustion. Do not use this instrument around open flames and combustible gases, liquids or solids. Only authorized personnel should conduct maintenance and/or servicing. Before conducting any maintenance or servicing, consult with authorized supervisor/manager. MIXCHEK Manual Rev 2 7/25/05 P/N M75030 ECO 05-0138 Teledyne Analytical Instruments...
- Page 2 This warranty does not cover defects caused by wear, accident, misuse, neglect or repairs other than those performed by Teledyne or an authorized service center. We assume no liability for direct or indirect damages of any kind and the purchaser by the acceptance of the equipment will assume all liability for any damage, which may result from its use or misuse.
- Page 3 Commonly available options are listed below. CE CONFORMITY: This Teledyne Analytical instruments MIXCHEK Analyzer meets or exceeds all requirements of the Commonwealth of Europe (CE) for Radio Frequency Interference and Electromagnetic Interference (RFI/EMI) protection.
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Page 4: Safety Messages
Additional information and comments regarding a specific component or procedure are highlighted in the Symbol form of a note. CAUTION: THE ANALYZER SHOULD ONLY BE USED FOR THE PURPOSE AND IN THE MANNER DESCRIBED IN THIS MANUAL. Teledyne Analytical Instruments... - Page 5 Manuals do get lost. Additional manuals can be obtained from Teledyne at the address given in the Appendix. Some of our manuals are available in electronic form via the internet. Please visit our website at: www.teledyne-ai.com.
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Page 6: Table Of Contents
(Portable Model Only) 2.7 Calibration Operation ..................25 3.1 Operation/Start-up 3.1.1 Powering Up 3.1.2 Setting the O2 Span 3.1.3 Attaching the Sample Gas Maintenance................. 27 4.1 Micro-Fuel Cell Replacement 4.1.1 Storing and Handling Replacement Cells 4.2 Battery Replacement Teledyne Analytical Instruments... - Page 7 MIXCHEK Appendix ..................29 A.1 Specifications A.2 Spare Parts List A.3 Helium/Air Chart A.4 Material Safety Data Sheet Index ..................... 37 Teledyne Analytical Instruments...
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Page 8: List Of Figures
MIXCHEK List of Figures Figure 1-1: Wall-mountable MIXCHEK .......... 12 Figure 1-2: MIXCHEK—Portable Configuration......12 Figure 2-1: Mounting Dimensions..........16 Figure 2-2: Removing the Front Panel ......... 17 Figure 2-3: Installing the Sensor ........... 18 Figure 2-4: Power Adapter Port (Wall Mount)........ 19 Figure 2-5: Power Adapter Port (Portable Model) ...... - Page 9 Since the use of this instrument is beyond the control of Teledyne, no responsibility by Teledyne, its affiliates, and agents for damage or injury from misuse or neglect of this equipment is implied or assumed.
- Page 10 MIXCHEK BLANK Teledyne Analytical Instruments...
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Page 11: Introduction
MIXCHEK Introduction Introduction The Teledyne MIXCHEK is a dedicated instrument designed to accurately monitor the composition of a gas during mixing or cylinder filling operations. A LCD mounted on the front panel of the instrument displays the percentage of helium and oxygen during the mixing operation. -
Page 12: Figure 1-1: Wall-Mountable Mixchek
Introduction MIXCHEK Accuracy is maintained to ± 1% across the entire 0-100% analysis range (He or O ) of the instrument at constant temperature (25°C) at constant pressure (atmospheric). Figure 1-1: Wall-mountable MIXCHEK Figure 1-2: MIXCHEK—Portable Configuration Teledyne Analytical Instruments... -
Page 13: Features
The MIXCHEK is specifically offered to the diving industry where specific mixtures of Helium and Oxygen in air are required for technical diving. The MIXCHEK will allow on-site confirmation of gas mixtures prepared for divers. It is also useful in the gas mixing process during cylinder charging where adjustments to the gas composition can be made based on the real-time analysis of the gas mixture. - Page 14 Introduction MIXCHEK Other applications include: • Oxygen analysis in (He/N or air) gas environment • Gas purification and air liquefaction process control Teledyne Analytical Instruments...
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Page 15: Setup
2.2 Mounting the Analyzer (Wall-Mount Unit) The MIXCHEK is designed to mount and operate in a general- purpose area only. The instrument is not designed to accept or handle hazardous gases. -
Page 16: Installing The Oxygen Sensor
To install the sensor, carefully remove it from the shipping container and inspect it for damage. CAUTION: THE PC BOARD CONTAINS ELECTROSTATIC SENSITIVE COMPONENTS. OBSERVE PROPER ELECTROSTATIC DISCHARGE PRECAUTIONS WHEN WORKING ON OR NEAR THE PC BOARD. Teledyne Analytical Instruments... -
Page 17: Figure 2-2: Removing The Front Panel
MIXCHEK Setup WARNING: THE O2 SENSOR USED IN THE MIXCHEK USES ELECTROLYTE WHICH CONTAIN TOXIC SUBSTANCES, MAINLY LEAD AND POTASSIUM HYDROXIDE. THESE SUBSTANCES CAN BE HARMFUL IF TOUCHED, SWALLOWED, OR INHALED. AVOID CONTACT WITH ANY FLUID OR POWDER IN OR AROUND THE UNIT. WHAT MAY APPEAR TO BE PLAIN WATER COULD CONTAIN ONE OF THESE TOXIC SUBSTANCES. -
Page 18: Ac Power Connections
(Portable model shown, wall-mount is similar) 2.4 AC Power Connections Instrument power for the standard wall-mountable model is supplied by a 6VDC power adapter that is plugged into the side of the analyzer as shown in Figure 2-4. Teledyne Analytical Instruments... -
Page 19: Figure 2-4: Power Adapter Port (Wall Mount)
BATT TEST switch as shown in Figure 2-5. This figure also shows the internal pressure vent port which allows the instrument to vent and return to atmospheric pressure before the lid is opened. Figure 2-5: Power Adapter Port (Portable Model) Teledyne Analytical Instruments... -
Page 20: Battery Test (Portable Model Only)
See Figure 2-6. When replacing batteries, for best results use only long-life alkaline batteries. The monitor can be run for up to 150 hours on a fresh set of batteries. Teledyne Analytical Instruments... -
Page 21: Calibration
20.9%. To calibrate the oxygen cell, the sample flow rate should be set to 0.2 2LPM. The air is then attached to the sample line. After the reading stabilizes, adjust the oxygen reading to 20.9% with the Span Teledyne Analytical Instruments... - Page 22 Zero Calibration (helium sensor) Note: To zero the helium sensor, there must be no residual gases other than air in the sample line of the instrument. Step 1 below is designed to purge the sample line using air. Teledyne Analytical Instruments...
- Page 23 He with air flowing through the instrument and 0.00 ±0.2% O 100.0% ±0.2% He when flowing 100% He. For additional calibration notes, see Section A.3 in the Appendix. The analyzer is now ready to be placed in service. Teledyne Analytical Instruments...
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Page 24: Figure 2-7: Typical Sample System With Calibration
Setup MIXCHEK Figure 2-7: Typical Sample System with Provisions for Calibration Teledyne Analytical Instruments... -
Page 25: Operation
3.1.2 Setting the O2 Span The MIXCHEK is shipped calibrated from the factory. The helium section will rarely require any further calibration. If the helium sensor is replaced, then calibration of the helium sensor is required. -
Page 26: Figure 3-1: Typical Setup Flow Diagram
Depending on the sample system employed, it may require several minutes for the gas sample to reach the analyzer and become stable. Figure 3-1: Typical Setup Flow Diagram Note: The wall-mounted version requires the tubing and a 1/8” NPT male barb fitting. Teledyne Analytical Instruments... -
Page 27: Maintenance
MIXCHEK Maintenance Maintenance The MIXCHEK requires very little maintenance, other than calibration, checking and changing the batteries and oxygen sensor, and cleaning the plastic housing. Routine maintenance consists of periodic cleaning of the front panel and displays and leak checking the gas lines. -
Page 28: Figure 4-1: Battery Disposition
Maintenance MIXCHEK Figure 4-1: Battery Disposition Teledyne Analytical Instruments... -
Page 29: Appendix
MIXCHEK Appendix Appendix A.1 Specifications CE Conformity: This Teledyne Analytical instruments MIXCHEK Analyzer meets or exceeds all requirements of the Commonwealth of Europe (CE) for Radio Frequency Interference and Electromagnetic Interference (RFI/EMI) protection. Gas Concentrations: 1 SLPM nominal 2.5 SLPM maximum (0.5 psig/3.4 kPa max) - Page 30 (157.5 x 149.9 x 94.0)mm Portable: (8.7 L x 7.5 W x 3.8 D)in (221 x 190.5 x 96.5) mm Storage Temp. 0 to +50°C Operating Temp: 0-40°C Humidity: Environmental, 95% non-condensing max. Pollution Degree: 2 Over Voltage Category: 1 Teledyne Analytical Instruments...
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Page 31: Spare Parts List
(if available) and the model and serial number of the instrument for which the parts are intended. Orders should be sent to: TELEDYNE Analytical Instruments 16830 Chestnut Street City of Industry, CA 91749-1580 Phone (626) 934-1500, Fax (626) 961-2538 Web: www.teledyne-ai.com... -
Page 32: Helium/Air Chart
+/-2% or better. Readjust the gas mixture and repeat the process. Typically, it is adequate to check one high helium reading, and one low reading on a MIXCHEK analyzer (these analyzers use two point calibration). Helium concentrations of 10% and 90% are good targets to shoot for. - Page 33 The use of the power inflator sample adapter will ensure that the sample flow rate is correct. If the analyzer fails the test, first verify that the oxygen span has been correctly set, and that it was done with standard air. Standard air has oxygen content of 20.9%. Teledyne Analytical Instruments...
- Page 34 12.12 1.88 12.33 2.09 12.54 2.30 12.75 2.51 12.96 2.72 13.17 2.93 13.38 3.14 13.59 3.34 13.79 3.55 14.00 3.76 14.21 3.97 14.42 4.18 14.63 4.39 14.84 4.60 15.05 4.81 15.26 5.02 15.47 5.23 15.68 5.43 15.88 Teledyne Analytical Instruments...
- Page 35 16.93 6.69 17.14 6.90 17.35 7.11 17.56 7.32 17.77 7.52 17.97 7.73 18.18 7.94 18.39 8.15 18.60 8.36 18.81 8.57 19.02 8.78 19.23 8.99 19.44 9.20 19.65 9.41 19.86 9.61 20.06 9.82 20.27 10.03 20.48 10.24 20.69 Teledyne Analytical Instruments...
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Page 36: Material Safety Data Sheet
Appendix MIXCHEK A.4 Material Safety Data Sheet Consult Teledyne for a copy of the MSDS sheet for this product or visit our website at www.teledyne-ai.com. Teledyne Analytical Instruments... -
Page 37: Index
27 LCD display, 13 spare parts listing, 31 maintenance, 27 stockpiling MFCs, 27 manuals, additional, v Teledyne address, 31 micro-fuel cell, 11 thermal conductivity sensor, 11, 13 replacement, 27 warning sign, iv micro-fuel cell installation. See sensor... - Page 38 Index MIXCHEK Teledyne Analytical Instruments...