1µ to 1000V and enjoy multimeter convenience

ammeter, it stands alone handling ± 0.1 nA to ± 2 amperes full scale, with ±. 0.2% accuracy. Similarly, as an ohmmeter, this ver- satile performer ...
0 downloads 8 Views 223KB Size
Report for Analytical Chemists

Ilo

come out of the automated systems. It is the analytical chemist who must plan for procurement of ap­ propriate samples so that the num­ bers that spew forth from a con­ trolling computer will have real meaning. Thus, it is the analytical chemist who must be continually upgrading his understanding of the analytical measurement process to meet the ever-increasing demands. Do I see analytical chemistry as a fading discipline? Decidedly not! Rather, as I look at this field of analytical chemistry including as it does people who call themselves analytical chemists and many more who spend much of their time doing analytical chemistry, I find un­ paralleled opportunity!

how sweet it is

...measure 1μν to 1000V and enjoy multimeter convenience Here's the sweetest little performer around in a low-priced, SVa-digit de multimeter. A new entry fielded by Keith ley, leader in low voltage measurements, the Model 160 sweetens its fantastic ± 1 /iv sensitivity with ± 0 . 1 % accuracy, t r u e i n p u t i m p e d a n c e of 10 megohms, ± 1 μν/day stability and high ac rejection. As an ammeter, it stands alone handling ± 0.1 nA to ± 2 amperes full scale, with ± 0.2% accuracy. Similarly, as an ohmmeter, this ver­ satile performer spans a resistance range from 0.1 ohm to 2000 meg­ ohms full scale measured using 2terminal leads. Wide capability in measuring volt­ age, current and resistance make the Model 160 useful on every R & D and production test bench. Conven­

ience features are numerous. A dis­ play rate of two readings per second with 1 0 0 % overranging. When over­ loaded, the display blanks the last 3 digits for no-error interpretation. Two front panel input terminals h a n d l e a l l f u n c t i o n s . C h o i c e of grounded or floating operation. And lots of other sweet features. Includ­ ing a low price of $545. See how sweet it is. Call your Keithley Sales Engineer or contact us direct for details. Get a free "how sweet it is " button, too. (Great for the kids.) Keithley Instruments, Inc., 28775 Aurora Road, Cleveland, Ohio 44139. Or telephone 2 1 6 / 2 4 8 0400. In Europe: 14, Ave. Villardin, 1009 Pully, Suisse, ι Prices s l i g h t l y higher | outside the U.S.A.

K

K E I T H L E Y

Circle No. 72 on Readers' Service Card 38 A • ANALYTICAL CHEMISTRY, VOL. 42, NO. 7, JUNE 1970

W. Wayne Meinke is chief of the Analytical Chemistry Division in the Institute for Materials Research at the National Bureau of Stan­ dards. He is also chief of the NBS Office of Standard Reference Ma­ terials. Dr. Meinke received his A.B. degree in chemistry at Oberlin College in 1947 and his Ph.D. degree in nuclear chemistry from the Uni­ versity of California in Berkeley in I960. He served on the faculty in the department of chemistry at the University of Michigan from 1950 to 1963 when he joined the National Bureau of Standards. He is active in ACS and IUPAC affairs and is currently on the Advisory Board of ANALYTICAL CHEMISTRY.

Presented in these pages are the two talks which introduced the topic, "Analytical Chemistry—A Fading Discipline?" at a special symposium held during the Pitts­ burgh Conference on Analytical Chemistry and Applied Spectros­ copy in Cleveland, Ohio, March 4, 1970