Manuale d’uso / di manutenzione del prodotto 212R del fabbricante Teledyne
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Teledyne Analytical Instruments 1 Thermal Conductivity Analyzer Model 212R I NSTR UCTION M ANU AL M ODEL 212R T HERMAL C ONDUCTIVITY A NAL YZER HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING SYSTEM. PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM.
Teledyne Analytical Instruments 2 Thermal Conductivity Analyzer Model 212R All Rights Reserved. No part of this manual may be reproduced, transmitted, transcribed, stored in a retrieval system, or tra.
Teledyne Analytical Instruments 3 Thermal Conductivity Analyzer Model 212R T ab le of Contents 1 Introduction 1.1 Method of Analysis ....................................................... 5 1. 2 Sensitivity ...........................................
Teledyne Analytical Instruments 4 Thermal Conductivity Analyzer Model 212R 4. 3 Standardization ............................................................ 16 5 P eriodic Maintenance 5. 1 Heater F an ..................................................
Teledyne Analytical Instruments 5 Thermal Conductivity Analyzer Model 212R 1 . INTRODUCTION 1.1 Method of Analysis. The Model 212R compares the thermal conductivity of a sample gas to that of a fixed composition reference gas and produces an electrical output signal that is calibrated to represent the difference between the two gases.
Teledyne Analytical Instruments 6 Thermal Conductivity Analyzer Model 212R 1.2 Sensitivity. Differences in thermal conductivity that produce a measuring bridge error signal of 0.
Teledyne Analytical Instruments 7 Thermal Conductivity Analyzer Model 212R panel, are located immediately behind a hinged front access door. The analyzer is suitable for installation in a sheltered non-hazardous area. A recording and/or indicating device will be required to transduce the electrical output signal into readable information.
Teledyne Analytical Instruments 8 Thermal Conductivity Analyzer Model 212R IMPORTANT: The foam lining the interior of the analyzer is an integral part of the environmental temperature control system. Removal or destruction of this lining will result in erratic instrument perfor- mance.
Teledyne Analytical Instruments 9 Thermal Conductivity Analyzer Model 212R Run the cable attached to the transformer unit in through the access hole that is equipped with the cable clamp and terminate it as specified on the interconnection diagram. 2.
Teledyne Analytical Instruments 10 Thermal Conductivity Analyzer Model 212R cause a large fluctuation in output signal. For best results, use electropolished SS tubing Note #4 : Because of the diffusi.
Teledyne Analytical Instruments 11 Thermal Conductivity Analyzer Model 212R 2.3.4 Installation of Cylinder Supplies. The reference and standard gas cylinders should be installed as close to the analyzer as possible. Each cylinder should be provided with a dual stage, metallic diaphragm, pressure reducing regulator.
Teledyne Analytical Instruments 12 Thermal Conductivity Analyzer Model 212R 2.3.7 Vent Lines. The sample path, reference path, and an integral bypass system vent from separate ports at the rear of the analyzer. Wherever possible, TAI recommends that the gases be permitted to vent directly to the atmosphere.
Teledyne Analytical Instruments 13 Thermal Conductivity Analyzer Model 212R 4. Determine what the sample pressure is and set the output pressure of the cylinder gas supplies to agree with the sample pressure. This procedure, although not absolutely necessary, will minimize flow adjustments when the sample path is switched to the various inputs.
Teledyne Analytical Instruments 14 Thermal Conductivity Analyzer Model 212R After the analyzer stabilizes adjust the "ZERO" control until the recorder indicates the impurity concentration of the zero gas composition. Be sure that the range switch is on position #1 and that the sample path flowrate is 0.
Teledyne Analytical Instruments 15 Thermal Conductivity Analyzer Model 212R virtually instantaneous. Recovery is a function of how long it takes to purge the sampling system upstream from the cell. Accelerating the sample path flowrate will speed the response.
Teledyne Analytical Instruments 16 Thermal Conductivity Analyzer Model 212R The reference and sample flowrates should be checked daily. The instru- ment is somewhat flow sensitive. Operating on Range #1 a change in flowrate of 0.1 scfh will cause a corresponding change in sensitivity of from 1 to 20% of scale.
Teledyne Analytical Instruments 17 Thermal Conductivity Analyzer Model 212R Due to the delicate balance of the thermal conductivity cell employed in the analyzer, exposure to the atmosphere in an uncontrolled temperature environ- ment is undesirable.
Teledyne Analytical Instruments 18 Thermal Conductivity Analyzer Model 212R Check to see that both the analyzer and recorder are being furnished electrical power. Check to see that the analyzer and recorder fuses are intact. Check all electrical connections outside of the analyzer.
Teledyne Analytical Instruments 19 Thermal Conductivity Analyzer Model 212R 6.2.1 Dynamic Balance Procedure. The measuring bridge circuit (see schematic) incorporates two 10 turn potentiometers that a.
Teledyne Analytical Instruments 20 Thermal Conductivity Analyzer Model 212R 5) Using a screwdriver that has a shaft diameter of 1/8” and a shaft length of at least 6”, turn the “Reactive” balance adjustment all the way counterclockwise (CCW) until the potentiometer stop point is reached.
Teledyne Analytical Instruments 21 Thermal Conductivity Analyzer Model 212R or incorrect instrument installation. The following conditions can produce an erratic output from the analyzer: 1) Installation in an area that is subject to large changes in ambient temperature, direct sunlight, drafts from wind, blowers, or air condi- tioners.
Teledyne Analytical Instruments 22 Thermal Conductivity Analyzer Model 212R Check as previously stated, the analyzers entire sampling system has been checked under pressure with a leak detector.
Teledyne Analytical Instruments 23 Thermal Conductivity Analyzer Model 212R tom must be evident with zero gas flowing. If this symptom is displayed only when the sample is flowing, the problem is related to one (or more) of the five (5) points outlined in section 7.
Teledyne Analytical Instruments 24 Thermal Conductivity Analyzer Model 212R CAUTION: Do not touch the thermistor probe with the iron. The end of the probe is tied and taped to the sample tubing below the cell cover. If the meter reading suddenly drops to zero, remove the soldering iron immediately.
Teledyne Analytical Instruments 25 Thermal Conductivity Analyzer Model 212R 7. 2 Output Signal: Output coincides with 100% analysis. 4 m A = 0 ppm N 2 in H 2 20mA = 50,000 ppm N 2 in H 2 - Range #1 = 5000 ppm N 2 in H 2 - Range #2 = 500 ppm N 2 in H 2 - Range #3 7.
Teledyne Analytical Instruments 26 Thermal Conductivity Analyzer Model 212R 7.4.3 Span Gas. Containing an equivalent impurity. Again, the span gas must be procured from a supplier who will certify its composition. The range switch must be in range 3 when the span gas is introduced.
Teledyne Analytical Instruments 27 Thermal Conductivity Analyzer Model 212R 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 TWX (910) 584-1887 TDYANYL COID Web: www.
Teledyne Analytical Instruments 28 Thermal Conductivity Analyzer Model 212R APPENDIX Specifications : Ranges: Three decade ranges: Minimum Full scale(ppm) 20 ppm Hydrogen balance Argon 25 ppm Hydrogen.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Teledyne 212R è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Teledyne 212R - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Teledyne 212R imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Teledyne 212R ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Teledyne 212R, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Teledyne 212R.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Teledyne 212R. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Teledyne 212R insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
