AC VOLTMETER
VT-171
VT-171E
© P R I N T E D . >APAN
INSTRUCTION MANUAL
KENWOOD CORPORATION
KENWOOD
Страница 1: ...AC VOLTMETER VT 171 VT 171E P R I N T E D APAN INSTRUCTION MANUAL KENWOOD CORPORATION KENWOOD ...
Страница 2: ...3 3 SPECIFICATIONS 4 4 FUNCTIONAL C O N T R O L S 7 5 O P E R A T I O N 8 6 A P P L I C A T I O N S 10 7 MAINTENANCE 12 8 A L I G N M E N T 13 9 CAUTIONS FOR USE 14 A product of KENWOOD CORPORATION 2 5 1 chome Shibuya Shibuya ku Tokyo 150 Japan 2 ...
Страница 3: ...wn enclosed by T J a Dual power differential input amplifiers used in the entire circuit provide a high reliability and good characteristic of restoration from possible saturation due to excessive inputs b A large sized Taut band meter has a high sensitivity and reliability c The number of adjusting trimmers are minimized with the use of the amplifiers which are precisely calculated in the open lo...
Страница 4: ...300mV in 12ranges 1mV 3mV 10mV 30mV 100mV 300mV 1V 3V 10V 30V 100V and 300V full scales ro 3mV 100mV in 12ranges 0 3mV 1mV 3mV 10mV 30mV 100mV 300mV 1V 3V 10V 30V and 100V full scales J dB 80 50dB r 90 40dBJ 0dB 1V dBm 80 52dBm r 90 42dBmJ 0dBm 1mW 600O Error W i t h i n 3 o f full scale at 1kHz Frequency response 10 at 5Hz 1MHz 5 at 10Hz 500kHz and 2 at 20Hz 100kHz as referenced to 1kHz response ...
Страница 5: ...ed by sigal noise ratio in 0 3mV 1mV and 1V ranges J Signal to noise ratio Over 40dB at full scale rover 30dB at 0 3mV range J Environmental Temperature coefficient 0 08 C Within specifications tenperature 10 40 C Full operating temperature 0 50 C Relative humidity Less than 80 Power Supply Section Line voltage 100 120 220V A C 10 216 250V A C 50 60Hz power consumption Approx 4W Dimensions 128 130...
Страница 6: ...Figure 1 Front Panel View Figure 2 Rear Panel View 8 ...
Страница 7: ...ference control 7 U N C A L Uncalibration indicator 8 Meter 9 Meter zero adjust screw 2 Rear Panel see Figure 2 10 Power connector 11 Line voltage selector and fuse holder 12 Remote control connector option blind 3 Preset Controls on Side Panel see Figure 3 The following controls placed on the Main PC board X65 1370 00 are to be preset on the right hand side panel 13 TC101 First Attenuator preset ...
Страница 8: ...ndicates 1V A t the 300 m V position the division 3 on the scale indicates 300mV Similarly the other R A N G E selector positions show their full scale values 2 dB Scale In general the dB values are expressed in dBV which is a unit referenced by 0 dB equal to 1V The division 10 at the scale corresponds to 0 dB on the dB scale which is a voltage ratio scale Since the R A N G E selector has 12 range...
Страница 9: ... V T 1 7 1 VT 171EJ Install and plug the optional con nector into the 16 pin connector on the PC board The RT 61 option a remarkable feature of the VT 171 provides a remote control capability To use the option remove the case and the rear panel blind plate install the connector supplied with the RT 61 then plug the RT 61 into the 16 pin connector on the print circuit board For details refer to the...
Страница 10: ...cable to negative feedback amplifiers that is it is available for measuring an open loop gain of each amplifier circuit with the negative feedback signal leaves applied Further the method can be used for measuring the frequency responses of given circuits by changing the signal generator frequency As an example let us calculate the open loop gain from point A to B of the negative feedback amplifie...
Страница 11: ...peak value root mean square value are known then the root mean square value and peak value can be cal culated as follows a Assume that the meter reads V 2 Tl Absolute mean value V 0 9 V TZ Root mean square value Absolute mean value x f o r m factor Peak value Root mean square value x crest b For rectangular waves their form factor is unity 1 and the crest unit 1 2v 2 Absolute mean value V 0 9V 7C ...
Страница 12: ... goes out the device is no longer operable If gone out check for a trouble cause remedy it remove the cap of the fuse holder on the rear panel using a minus screw driver and take it out and replace the fuse with a new one When replacing fuse be sura to check the capacity of a new fuse for a specified value as follows A C 100V 120 0 2A A C 220V 240 V 0 1 A C H A N G E O V E R O F V O L T A G E IN S...
Страница 13: ... 3 1 Before turning the O N O F F switch O N adjust the Meter zero adjust screw until the pointer correctly indicates 0 2 Connect a voltmeter calibrator 1 kHz or 400Hz output to the INPUT connector 3 Set the voltmeter calibrator output voltage to 30mV and set the R A N G E selector on your VT 171 I VT 171EJ to the 30mV range 4 Adjust VR102 until the pointer swings to the full scale 5 In turn set t...
Страница 14: ...o strong 3 The input cable other than the supplied one should be low capacitance shielded cord or coaxial cable 4 The continuous maximum input voltage allowable for your VT 171 FVT 171EJ is 100V DC AC peak with the R A N G E selector at 60dB l 70dBJ to 10dB lOdBJ Full care should be odserved in measuring high voltages 5 Be careful of a line noise and similar small noises as your VT 171 f V T 1 7 1...
