^
^Universal
Z-Y Bridge Measures impedance . . . .y . , ...
from 0 to oo ohms balanced or grounded positive or negative at any phase angle over 20-cps to 20-kc range
The Type 1603-A Z-Y Bridge is the latest addition to the G-R line of precision impedance-measuring apparatus. This Universal Z-Y Bridge will measure any impedance — from short circuit to open circuit, at small or large phase angle, and with a basic accuracy of 1% over most of this very wide range. Quadrature components of impedance, R & X or G & Β, are measured directly at calibrated 100c, lkc and lOkc bridge positions. Measurements at other frequencies over the 20 to 20,000 cycle range are made simply by multiplying reactance X or susceptance Β readings by a factor which takes into account the difference between operating frequency and frequency setting of the Bridge selector switch. The ability to measure impedances of any magnitude and with good accuracy with the same instrument can be an ex tremely valuable asset in many measure ment situations. The Z-Y Bridge can be used by chemists for measuring conduc tivity of liquids in dielectric cells as readily as it can be used for ordinary R-L-C com ponent measurements in the laboratory or production-test department. It will meas ure . . . open-and short-circuit transformer parameters . . . impedances of batteries and electrolytic capacitors . . . characteris tics of audio-transmission networks . . . motional impedance of electro-acoustic transducers . . . Q and resonant frequency of chokes . . . and impedances of feed back loops, since negative real parameters are directly measured. The Bridge also can be used to deter mine cable-fault locations and circular-arc plots of liquids or solids having lossy polarizations in the audio-frequency range. These are but a few of the countless ap plications for this unique and versatile de vice. You name it — this Ζ- Y Bridge can probably measure it!
Met of Impedance Z. of Feedback C i r c u i t . . . . illustrates ability of the Z-Y Bridge to measure any im pedance; quadrature components may be pc-iiive or negative, real or imaginary.
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SPECIFICATIONS Frequency Range — 20 cycles to 20 kc Impedance and Admittance Range — R: ±1000 ohms G: ±1000 ^mhos X : ± 1000 ohms Β : ± 1000 Mmhos Accuracy — R o r G : ± ( 1 % + [ 1 ohm or 1 ^rtiho]) X or Β : ± ( 1 % + (jo ohm or j _ Mmho |) f is operating frequency, fo is frequency setting of panel selector switch
Impedances of less than 100 Ω (or 100 Mmhos) can be measured on "Initial Balance" dials with considerably greater accuracy — R or G : ± ( 1 % + [ 0.2_fp ohm or 0.2_f_ Mmho ]) f fo X or B: ± ( 1 % + [0.2jo ohm or 0.2 _f_ M mho)) f
GENERAL RADIO Company 77S Meetachtisettï Avenue, Cambridge 9 ^ ^ § « « h u » * i f * , t|, $. Au": 90 West Street NEW YORK i 8055 13th St.. Silver Spring. Md.WASHINGTON, D. C. 1150 York Road. Abington. Pa. PHILADELPHIA 920 S. Michigan Ave. C H I C A G O S 1000 Ν. Seward St. LOS ANGELES 3 »
Maximum Applied Voltage— 150 volts, rms Accessories Recommended — Type 1210-B Unit R-C Oscillator and Type 1212-A Unit Null Detector Accessories Supplied — 2 Shielded Cables for generator and detector Dimensions— 12I/2" χ 1314" x 814" Net Weight — 2114 lbs. Type 1603-A Z-Y Bridge — $335.00
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1£χ5ί1955 ^0Years ofWweeringl in Electronics
For further information, circle number 59 A on Readers' Service Card, page 61 A
WE SELL DIRECT Price»- are net, FOB Cambridge or West Concord, Mass.
