Kenwood VT-171 Instruction Manual
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Kenwood VT-171 Instruction Manual

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AC VOLTMETER
VT-171
VT-171E
INSTRUCTION MANUAL
KENWOOD CORPORATION
© P R I N T E D .
>APAN
Table of Contents
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Summary of Contents for Kenwood VT-171

  • Page 1 AC VOLTMETER VT-171 VT-171E INSTRUCTION MANUAL KENWOOD CORPORATION © P R I N T E D . >APAN...

  • Page 2: Table Of Contents

    CONTENTS G E N E R A L F E A T U R E S S P E C I F I C A T I O N S F U N C T I O N A L C O N T R O L S O P E R A T I O N •...

  • Page 3: G E N E R A L

    1. G E N E R A L 2. F E A T U R E S Dual power differential input a m p l i f i e r s used in the Y o u r K E N W O O D ' S Electronic V o l t m e t e r , Model V T - 1 7 1 , entire circuit provide a high reliability and good r"VT-171EJ , is a voltmeter of absolute-mean value...

  • Page 4: S P E C I F I C A T I O N S

    3. S P E C I F I C A T I O N S The input attenuators are switched by a so-called " logic control c i r c u i t " so t h a t a desired range can [Meter Section] be selected w i t h use of a remote control device Messurable voltages :...
  • Page 5 S t a b i l i t y : W i t h i n ± 0 . 5 % of f u l l scale for R e l a t i v e humidity : Less than 80% ±...
  • Page 6 Figure 1 - Front Panel View. Figure 2 - Rear Panel View. < 8 >...

  • Page 7: F U N C T I O N A L C O N T R O L S

    13. TC101 : F i r s t A t t e n u a t o r preset t r i m m e r 4. F U N C T I O N A L C O N T R O L S capacitor 14.

  • Page 8: Operation

    5. OPERATION ® indicates 1 V . A t the "300 m V position, the division 3 on the scale © i n d i c a t e s 300mV. S i m i l a r l y , the other •...
  • Page 9 (3) dBm Scale How to Use Relative Reference Control In general, voltmeters have a reference level division The R E L A T I V E R E F control is kept a t " C A L " in of OdBm equal to 0.775V (1 mV power) induced across general cases of reading calibrated, absolute values on a 600O resistance load.

  • Page 10: A P P L I C A T I O N S

    point A b e + 1 . 5 d B in the - 6 0 d B range and that of 6. A P P L I C A T I O N S point B - 4 d B in the +10dB range. The gain f r o m point A to B is The basic use of your V T - 1 7 1 ["VT-171EJ is to measure ( + l 0 d B - 4 d B ) - ( - 6 0 d B + 1.5dB) = 64.5dB.
  • Page 11 Root-Mean-Square and Peak Value Calculations F o r sawtooth waves, their f o r m f a c t o r is 2 / v Y o u r V T - 1 7 1 F V T - 1 7 1 E J , an voltmeter of absolute-mean the crest \ / 3 "...

  • Page 12: Maintenance

    new fuse f o r a specified value a s f o l l o w s : MAINTENANCE A C 100V, 120 : 0,2A A C 2 2 0 V , 240 V : 0.1 A (1) Removing the casing ( s e e F i g u r e 7 ) C H A N G E O V E R O F V O L T A G E IN S W I T C H I N G 1.

  • Page 13: A L I G N M E N T

    8. A L I G N M E N T Y o u r V T - 1 7 1 w a s precisely preset a t the f a c t o r y . How- ever, it can be aligned through the adjust holes located on the right-hand side w i t h leaving it housed in the casing, if required.

  • Page 14: C A U T I O N S F O R U S E

    9, C A U T I O N S FOR USE wide-band signal generator to the I N P U T c o n n e c t o r ® . 8. Set the signal generator frequency to 1 kHz and set the R A N G E selector ©...

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Vt-171e

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