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Kenwood VT-172, Инструкция по эксплуатации

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©PRINTED IN JAPAN 

N O I S E  M E T E R 

VT-172 

INSTRUCTION MANUAL 

K E N W O O D  C O R P O R A T I O N 

KENWOO

D 

Содержание VT-172

Страница 1: ... PRINTED IN JAPAN N O I S E M E T E R VT 172 INSTRUCTION MANUAL K E N W O O D CORPORATION KENWOOD ...

Страница 2: ... E N E R A L 3 2 F E A T U R E S 3 3 S P E C I F I C A T I O N S 4 4 C O N T R O L S AND INDICATORS 7 5 O P E R A T I O N 10 6 P R E C A U T I O N 11 7 MAINTENANCE 12 8 A D J U S T M E N T 13 9 A P P E N D I X 16 2 ...

Страница 3: ...ton selection of J I S A DIN NOISE DIN A U D I O CCIR and C C I R A R M weighting filters make possible noise measurements and S N measurements in accordance with a variety of standards c In addition to average detection and R M S display DIN and CCIR semi peak detection with R M S display is available for measurements in accordance with those standards d A C OUT and DC O U T terminals are provide...

Страница 4: ...detection and DIN NOISE DIN A U D I O or CCIR weighting filter W AV range within 7 of fullscale 30 tV 3G0V ranges within 5 of fullscale Frequency response With average detection and R M S display 10 iV range 20Hz 10kHz 5 10Hz 30kHz 10 30 A 300 A ranges 20Hz 20kHz 5 10Hz 100kHz 10 1mV 300V ranges 20Hz 100kHz 3 15Hz 300kHz 5 10Hz 500kHz 10 With quasi peak detection and R M S display 10 iV range 30Hz...

Страница 5: ...0 iVrms T Y P 30 iV range input shorted Input equality value Below 5 iV s 3 0 A rms T Y P Peak detection 10 A range input shorted Input equality value Below 2 0 iVrms 1 0 iVrms T Y P 30M range input shorted Input equality value Below 5 iVrms 3 0 A rms T Y P Stability Within 0 5 of fullscale for 10 line voltage fluctuation Amplifier Section A C A M P L I F I E R Gain Approx 100dB Output voltage 1Vr...

Страница 6: ...Environmental coefficient 0 08 C or less at 1mV range or more Operating temperature and humidity for within specification 15 35 C 80 R H maximum Full operating range 0 50 C 80 R H maximum Power Supply Section Supply voltage 100 117 220 240VAC 10 Max 250VAC 50 60Hz Power consumption Approx 15W Dimensions Width 128mm Height 190 214 mm Depth 285 315 mm di nsions include protrusions fro m the basic ca...

Страница 7: ... gradually worked down range to provide an easily readable meter deflection I N P U T Juck BNC signal input connector R E L A T I V E R E F Control and U N C A L Lamp Sensitivity adjustment and uncalibrated annunciator More than 10dB of adjustment is possible When the control is turned fully clockwise the set range is calibrated This control can be used to adjust the meter to an appropriate level ...

Страница 8: ...of the position of this switch W E I G H T Switch group This six position selection switch group allows selection of one of F L A T or J I S A DIN NOISE DIN A U D I O CCIR or C C I R A R M weighted response Selection of the F L A T position turns the unit into a wideband A C voltmeter If no button is depressed the mode is automatically C C I R A R M J I S A Used for noise level measurements in acc...

Страница 9: ...V E R A G E P E A K switch settings the various filters are for Filter A V E R A G E P E A K J I S A O DIN NOISE o DIN A U D I O o o CCIR o C C I R A R M o M E T E R M E T E R Zero adjust Trimmer Fig 2 Rear panel view 9 ...

Страница 10: ...PUT 3 Set the R A N G E switch to the 300V range 4 Connect the power cord and press the P O W E R switch to turn the unit ON The red L E D should light indicating the unit is ready for use 5 Input the signal to be measured and if necessary gradually switch to lower more sensitive ranges until an easy to read meter deflection is obtained USING R E L A T I V E R E F To make measurements with respect...

Страница 11: ...ate measurements allow a five minute warming up period before actual measurements are begin Note that switching between 1V and 300mV and between 1mV arid 300M and 10 A upon powering the unit up may result in the deflection of the meter 2 To preserve the high sensitivity of this unit be sure to use either the input signal cable provided or another low capacitance shielded cable Use of single conduc...

Страница 12: ... higher than the interna filter can handle performance may be affected Ooitsideration sttould be given to providing a clean power source in such a situation 8 Temperature coefficient is 0 1 C T Y P with 10A V 300J V ranges 7 MAINTENANCE Removing the CASE Using a screwdriver remove the two screw each on the left side right side and top of the instrument Open the bottom of the receptacle shaped case...

Страница 13: ... after verifying that the line voltage setting is correct Meter accuracy adjustment 1 Remove the case and bottom cover 2 Without applying power mechanically zero the meter using the zero adjustment screw 3 Using a meter calibrator apply either a 400Hz or 1kHz signal to the I N P U T of this instrument 4 Set the A V E R A G E P E A K switch to A V E R A G E and the W E I G H T switch to F L A T 5 S...

Страница 14: ... Unit for a fullscale deflection 10 Remove the calibrator and connect a wideband oscillator to the I N P U T Set the oscillator frequency to 1kHz and the meter range switch to 1V Adjust the oscillator output level for a fullscale deflection in this condition 11 Shift the oscillator frequency to 100kHz and use the T C 1 on the Input Unit to adjust the meter for fullscale deflection 12 Repeat the ab...

Страница 15: ...Fig 5 Input Unit Adjusti ts Bottom View Fig 6 Output Unit Adjustments Left Side View Fig 7 Filter Ur Adjustments Right Side View 1 5 ...

Страница 16: ...ards for semi peak detection of noise levels the following characteristics are specified 1 One tone burst is to be input and the measured value to be verified to be within the limits summarized below The tone burst is to be sine wave of 5kHz frequency The duration times are listed in the table below Tone burst duration ms 1 2 5 10 20 50 100 200 oo Measured value 17 0 26 6 40 48 52 59 68 80 100 All...

Страница 17: ... Response dB Responsed tolerance dB 1000 0 C 1250 0 6 1 0 1600 1 0 1 0 2000 1 2 1 0 2500 1 2 1 0 3150 1 2 1 0 4000 1 0 1 0 5000 0 5 1 0 6300 0 1 1 0 8000 1 1 1 0 10000 2 4 1 0 12500 4 2 2 0 16000 6 5 2 0 Table 4 Frequancy Hz Response dB Responsed tolerance dB 20 4 0 31 5 3 8 63 3 1 6 1 5 100 2 6 1 1 5 200 1 7 3 1 5 400 8 8 1 5 800 1 9 1 5 1000 0 0 5 2000 5 3 1 5 4000 8 2 1 5 5000 8 4 0 5 6300 8 0 ...

Страница 18: ...1 0 6 Frequancy Hz Response dB Responsed tolerance dB 10000 8 1 0 8 12500 0 1 2 14000 5 3 1 4 16000 1 1 7 1 65 20000 2 2 2 2 0 31500 4 2 7 2 8 oo Table 7 Frequancy Hz Response dB Responsed tolerance dB 3 1 5 3 5 5 2 0 63 2 9 5 1 4 100 2 5 4 1 0 200 1 9 4 0 8 5 400 1 3 4 0 7 800 7 5 0 1000 5 6 0 5 2000 0 01 3150 3 4 0 5 4000 4 9 0 5 5000 6 1 0 5 6300 6 6 0 7100 6 4 0 2 8000 5 8 0 4 9000 4 5 0 6 Fre...

Страница 19: ...Table 9 Noise Weighting Characteristics 1 9 JIS A DIN N O I S E DIN AUDIO CCIR C C I R A R M ...

Страница 20: ...A p r o d u c t o f KENWOOD CORPORATION 17 5 2 chome Shibuya S h i b u y a k u T o k y o 150 Japan 2 0 ...

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