INSTRUMENTATION

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INSTRUMENTATION Second Analytical Instrument Clinic of the Instrument Society of America will provide first-hand practical information on the use of analytical instruments by L ^ R O M Axel H . Peterson, Mellon I n s t i t u t e of I n d u s t r i a l R e s e a r c h , P i t t s b u r g h 13, P a . , w e h a v e r e c e i v e d advance notice t h a t the Second Analytical I n s t r u m e n t Clinic, sponsored b y t h e Analysis I n s t r u m e n t a t i o n C o m m i t t e e of t h e I n s t r u m e n t S o c i e t y of A m e r i c a , will b e h e l d i n C h i c a g o , 111., S e p t e m b e r 2 2 t o 24, 1953. T h e clinic is t o b e h e l d i n e i g h t r o o m s o n t h e first floor of t h e M o r r i s o n H o t e l a n d will s t a r t a t 9:30 A.M. a n d 2 : 3 0 P.M. E a c h comp a n y will g i v e t h e s a m e . 3 - h o u r l e c t u r e a n d d e m o n s t r a t i o n six t i m e s . M a n y favorable comments were r e c e i v e d a b o u t t h e first A n a l y t i c a l I n s t r u m e n t Clinic h e l d i n C l e v e l a n d i n 1952. T h e s e c o m m e n t s e m p h a sized t h a t t h e p a r t i c i p a t i n g c o m panies used their top technical m e n as instructors.

An operational panel of four recorders will be used to describe the function and construction of such instruments. I t will include a n extended range recorder which automatically shifts through five ranges to obtain the equivalent of a recorder with a chart nearly 5 feet wide. I t will also include a duplex recorder with pen speeds of 12 inches and 24 inches per second. For the experimenter who desires a universal instrument, there will be a recorder with adjusting knobs which enable the user to suppress or expand the range to best meet his application. I n some analytical applications it is desirable t o plot one variable versus another and for those interested in automatically plotting such curves a n X-Y recorder will be used. There will also be components, amplifiers, motors, and converters for those interested in constructing servo-systems t o meet their individual requirements.

PROGRAM

Consolidated Engineering Corp.

Beckman Instruments, Inc.

D Y N A M I C R E C O R D I N G SYSTEMS, A M P L I F I E R S , P I C K U P S , AND OSCILLOGRAPHS.

ANALYTICAL

COMPUTERS.

ject of the lecture the usefulness of analyzing problems mentation. Topics

The

ob-

is to demonstrate t h e computer in of control instruto be covered a r e :

1. Application of computer techniques to the design problems of the instrumentation. 2. Basic technique of computer operation. 3. Simulation of feedback controls, enabling dynamic analysis of the instrument in use with its associated equipment. 4. Simulation of process control instrumentation. 5. A review of the computers available for present-day design problems. B r o w n I n s t r u m e n t s Division, Minneapolis-Honeywell Regulator Co. ANALYTICAL

APPLICATION

OF

RE-

CORDERS. Recording instruments, particularly recording potentiometers, are being more widely used in p l a n t analytical applications and also for special applications in research and experimental laboratories.

D y n a m i c d a t a recording, because it is the most satisfactory means of evaluating t h e great number of variables affecting design a n d performance, is universally accepted as a requisite to success in modern research. C E C intends to emphasize the application of multichannel galvanometert y p e recording oscillographs to the study of stresses, accelerations, velocities, amplitudes, pressures, and other variables in t h e design and testing of a u t o m o biles, railroads, p u m p s , aircraft, missiles, etc. T h e trend toward t h e use of dynamic d a t a recorders, from research t o such phases as pilot-production a n d quality control, is to be discussed. Two entirely new recording oscillographs are t o be described to illustrate the present direction of precision instrument design. I n missile and aircraft testing, or wherever raw d a t a accumulate in quantities larger t h a n h u m a n s can effectively cope with, automatic d a t a processing 17 A

Ralph

H.

Müller

systems have become a necessity. C E C proposes to discuss briefly two recently introduced automatic digital d a t a processing systems designed to accelerate t h e tedious data-reduction processes. G e n e r a l E l e c t r i c Co. DIELECTRIC

CONSTANT

CHEMICAL

ANALYZER. Chemical analysis by means of dielectric constant measurements is a valuable technique little used in present-day instj'umentation. Since dielectric constant is a fundamental property of a material, it is a dependable property upon which t o base process control action. T h e equipment necessary is relatively simple a n d inexpensive. I t is adaptable to continuous as well as batch analysis. Difficult application problems can usually be overcome by special measuring techniques. T h e theory of dielectric constant chemical analysis will be presented as background for a discussion of this ins t r u m e n t which will be demonstrated. Test cell design will be t a k e n u p separately, since it will, in general, be tailored to fit the application. Typical installations will also be described. Possible applications to a wide variety of measurements on organic a n d inorganic liquids, solid sheets, powders, and gases will be discussed. RECORDING TURBIDIMETER.

Turbid-

ity for a n u m b e r of years has been measured b y a laborious sampling method. As turbidity measurements on a continuous basis are i m p o r t a n t in m a n y industries today, t h e recording turbidimeter has been developed t o do this job. I t operates on a null system which measures t h e ratio of scattered light t o transmitted light as t h e solution in question flows through the sampling chamber. T h e theory of operation a n d application problems will be discussed as well as actual demonstration of the equipm e n t . Possible applications include measurements on raw water, sewage effluent, liquid chemicals, and p a p e r pulp.

ANALYTICAL

18 A gases with respect to signal strength a n d direction of deflection, but also t h e use of calibrating resistors in t h e galva­ nometer circuit. A question and answer period follows for t h e benefit of those having special problems, either in application or in the design and construction of a p p a r a t u s .

INSTRUMENTATION Gow-Mac I n s t r u m e n t Co. T H E R M A L CONDUCTIVITY G A S A N A L Y ­

SIS. T h e presentation consists of the­ ory, application engineering, a n d prac­ tice, a n d includes a " d o w n - t o - e a r t h " illustrated lecture giving running com­ m e n t on some 25 slides. Material pro­ vided b y the leading manufacturers of gas analysis a p p a r a t u s is used during the lecture, as well as schematic wiring dia­ grams and gas flow systems, illustrating t h e most common applications. This occupies the first hour.

X-RAY

FLUORESCENCE

SPECTRO­

GRAPH. T h e presentation will feature a complete assemblage of x-ray spectro­ graph ic and diffraction instrumentation. T h e automatic scanning and recording features of the spectrograph will be demonstrated. T h e analysis b y ele­ ments which this new instrument makes possible provides a new tool of unusual utility. In addition, x-ray diffraction phenomena from multicrystalline m a ­ terials as synchronously explored and recorded, will be shown.

1. Water vapor in the atmosphere 2. Carbon dioxide in respired air 3. Water vapor in respired air 4. Cylinder nitrogen (W.P.) vs. room air 5. Cylinder oxygen vs. room air 6. Cylinder oxygen (mol. wt. 32.00) vs. cylinder nitrogen (mol. wt. 28.02)

T h e discussion will include basic theory of t h e methods, the principles of operation, and t h e practical fields of application in industry' and research. T h e demonstration will include the mode of operation, techniques of speci­ men t r e a t m e n t , a n d evaluation of re­ sults in x-ray spectroscopic analysis.

Experiments 4, 5, a n d 6 illustrate not only the anomalous behavior of these

more space a n on one floor more exhibitors nearly 500 1 tjtli'^"^ Η Β Γ — « » « ^ easily accessible centrally located Methods

Processes

Materials

Equipment Techniques Developments New Chemists and chemical engineers will find an unequalled opportunity to get first hand information from the men and companies who have contrib­ uted to the advances in the fast moving chemical industries. Years of chemical processing knowledge will be conveniently assembled under one roof in this greatly enlarged exposition. The progressive exhibitors repre­ sented will have technically staffed displays designed to make this exposi­ tion more informative than ever. Nowhere can you get so much valuable information on the latest chemical processing developments, in so short a time and so vividly. PLAN NOW TO ATTEND.

2 4 T H EXPOSITION

OF CHEMICAL INDUSTRIES NOV. 3 0 to DEC. 5 ESTABLISHED 1 9 1 5

COMMERCIAL MUSEUM AND CONVENTION HALL Application

forms

INTERNATIONAL

Qualitative analyses as well as q u a n t i t a ­ tive interpretation will be covered. X - r a y diffraction charts produced by t h e equipment will be on display, and there will be a condensed t r e a t m e n t of t h e field of application of this extremely useful investigative tool. There will be opportunity for discussion on a n y of the phases of t h e presentation.

N o r t h American Phillips Co., I n c .

After a break, t h e following demon­ strations are made using t h e Gow-Mac Gas Master (a portable relative thermal conductivity instrument) :

Ideas

CHEMISTRY

for hotel accommodations

EXPOSITION COMPANY, 480

are available by writing to

LEXINGTON AVE., NEW YORK

17, Ν. Υ.

The Perkin-Elmer Corp. DISPERSION"

INFRARED

ANALYZERS

FOR LABORATORY AND P L A N T .

Infrared

analysis has been widely applied in t h e laboratory for both research a n d prod­ uct control. T h e method is now being carried out into the pilot p l a n t a n d to the process stream itself. T h e problems involved in changing from laboratory b a t c h sampling to con­ tinuous analysis in the process stream will be discussed. T h e operation and use of a dispersion t y p e of process stream instrument (the bichromator analyzer) will be explained. I n addition, infrared instrumentation specifically designed to meet t h e re­ quirements of pilot plant application will be described. A typical analytical problem will be carried through t h e laboratory, pilot plant, a n d process stream phases with special attention to sampling problems. Process C o n t r o l s Division of Baird Associates NoNDISPERSION INFRARED ANALYZ­ ERS. Theory of infrared analysis, infra­ red sources, infrared receivers or detec­ tors, infrared materials, and principles of operation of positive a n d negative fil­ ter t y p e continuous infrared analyzers. Design considerations of positive and negative filter t y p e continuous infrared analyzers a n d associated electronics, methods of sensitization of instrument to various analytical problems, includ­ ing complex samples, calibration pro­ cedure, a n d testing for interference. Practical Aspects of P l a n t Installa­ tions. Typical applications, including discussions of applications to liquids, sample handling procedures, expected performance, and sendee a n d mainte­ nance considerations. Dr. Peterson and his committee a r e t o b e c o n g r a t u l a t e d for t h e s e a r r a n g e m e n t s . T h e clinic p r o v i d e s first-hand, practical information on t h e u s e s of a n a l y t i c a l i n s t r u m e n t s and, beyond this, indicates trends w h i c h will h a v e a p r o f o u n d i n f l u e n c e o n a n a l y t i c a l t e c h n i q u e s of t h e future.