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                                                                                        WY Series User

s Manual 

 

   

Copyright 

©

 EVERFINE, Copy or spread without authorization is prohibited.

  

7

Chapter 2 Basic Principle 

The  principle  schematic  diagram  of  WY  Series  Digital  Constant  Current  & 

Constant Voltage DC Power Supply is shown as follows: 

AC/DC conversion 

High-power regulator

Error correction network

Sampling and 

filter for current

Analysis test for 

electrical 

quantities

CPU

Keys 

LED display

RS232 

communication

DC output

Power supply

 

Fig.2.1 Principle schematic diagram of WY series 

The power source supplies electric energy to the high-power regulator via AC/DC 

conversion.  The  power  supply  can  switch  the  state  between  Constant  Current  (CC) 

and  Constant  Voltage  (CV)  automatically  with  relevant  indicator  so  as  to  get  high 

reliability. 

When  the  instrument  works  in  the 

CONSTANT  VOLTAGE

  state,  the 

Error 

Correction Network

 receives and amplifies the error signals of electric bridge output. 

And  then,  the  amplified  error  signals  control  the  high-power  regulator  to  output  the 

preset voltage stably and light the indicator 

CV

When  the  instrument  works  in  the 

CONSTANT  CURRENT

  state,  the 

Error 

-Correction Network

 compares the preset standard voltage with the voltage drop of 

the sampling resistance, and then amplifies the error signal, the amplified error signals 

control  the  high-power  regulator  to  output  the  preset  current  stably,  and  light  the 

indicator 

CC

The  power  supply  is  equipped  with  silicon  controlled  routine  to  control  the 

voltage  drop  of  the  high-power  regulator  so  as  to  ensure  the  high  efficiency  of  the 

power supply. 

Содержание WY Series

Страница 1: ...Y5015 EVERFINE PHOTO E INFO CO LTD ADD Bldg 1 669 Binkang Rd Binjiang Hi Tech Zone Hangzhou 310053 China Tel 86 571 86698333 Fax 86 571 86696433 E mail Sales everfine cn Service everfine cn http www e...

Страница 2: ...formance and functions of its products therefore the contents of this manual may be changed without prior notice l Great effort has been made in preparation of this manual to ensure the accuracy of it...

Страница 3: ...ting the whole or part contents of this manual by any company or personnel without the written permission of EVERFINE is prohibited Otherwise it will be treated as infringement and the infringer will...

Страница 4: ...age it 6 To ensure good air ventilation and heat dispersion capability please don t block the vent holes in the rear panel and do not cover the instrument 7 When the remote sampling function is not us...

Страница 5: ...t current power supply preset the Protect Voltage value then set a proper value of voltage and current press the output button to export power and then rotate the adjusting knob for voltage and curren...

Страница 6: ...3 Specifications 8 3 1 Main specifications 8 Chapter 4 Panel Instructions 11 4 1 Front Panel 11 4 2 Rear Panel 15 Chapter 5 Operation Procedures 16 5 1 Preparations 16 5 2 Turn the power on 16 5 3 Adj...

Страница 7: ...and so on The power supply has the following characteristics 1 Adopt numerical control NC adjustment with three adjusting levels COARE MIDDLE and FINE which has good reliability convenient adjustment...

Страница 8: ...ltage CV automatically with relevant indicator so as to get high reliability When the instrument works in the CONSTANT VOLTAGE state the Error Correction Network receives and amplifies the error signa...

Страница 9: ...tate 0 01 rdg 30mins preheat 10mins after arriving in full range state 7 Range of voltmeter 5V 10V 25V 50V WY605 5V 10V 25V 60V 8 Voltmeter resolution 0 0001V 0 0000V 50 0000V 9 Voltmeter accuracy Cla...

Страница 10: ...5015 CV voltage ripple Vrms 0 5mV 0 5mV 0 5mV 1 5mV CC current ripple Irms 0 5mA 0 5mA 1 5mA 3 0mA Ammeter measuring range 0 5A 1A 2 5A 5A 0 5A 1A 2 5A 5A 1A 2A 5A 10A 1 5A 3A 7 5A 15A Max output powe...

Страница 11: ...ve humidity 55 20 3 Power supply 220V 22V 4 Frequency 50Hz 60Hz 5 No mechanical vibration and electromagnetic to interfere with the test results 6 Dimension and weight as shown in Table 2 Table 2 Dime...

Страница 12: ...G indicator lights otherwise it displays the measured value The window will display oV oT RVSF1 RVSF2 or MIX to show the abnormal situations of over voltage over temperature sampling voltage lower tha...

Страница 13: ...t value is 5V When the voltage value exceeds the limit value the buzzer will give an alarm to prompt user to rotate the adjusting knob in reverse direction 9 Selection keys for adjusting level COARSE...

Страница 14: ...the key again to complete the setup Press OUTPUT key to display the setting voltage and current value 13 OUTPUT Press the key to output voltage with the indicator OUTPUT lighting 14 RESET When the ind...

Страница 15: ...Window displays RVSF1 the instrument will give RVSF1 alarm as the sampled voltage is less than 2V please check the connection For instance in exterior sampling state reverses the polarity of the four...

Страница 16: ...4 2 Rear Panel of WY305 Fig 4 3 Rear Panel of WY605 WY3010 WY5015 1 Fan 2 Fuse holder 3 Power socket 4 Grounding terminal 5 output terminal of power supply red 6 output terminal of power supply black...

Страница 17: ...0V and 50V respectively If needs to change firstly set the protection voltage according to the load characteristics If the load is damaged when the voltage exceeds 10V press DISPLAY OVP key to make th...

Страница 18: ...e limited voltage value by turning the adjusting knob for voltage clockwise the instrument will turn into the constant current state simultaneously the indicator CV goes out and the indicator for CC l...

Страница 19: ...onnections for remote sampling 5 4 Switch load 1 Before cutting off the load cut off the source output and make sure there is no voltage between the load 2 Remove the previous load and install the new...

Страница 20: ...communication method a frame of 11bits the 0st is the start bit the following 8 bits are the data bits the 9th is the programmable bit and the last one is the stop bit The baud rate is 2400Bps The add...

Страница 21: ...ment results are 30H 2EH 31H 32H 33H 34H 56H 35H 2EH 36H 37H 38H 39H 30H 41H the result should be 0 1234V5 67890A Examples Received data Working state of the instrument U 5 0000 1 02500 The instrument...

Страница 22: ...1 F 46H to PC G Transfers the 16 digit measurement result to PC R Enters into reset state s 5 0000 Instrument s protection voltage is 5V o output voltage n no output A Transfers 5 abnormalities to PC...

Страница 23: ...WY Series User s Manual Copyright EVERFINE Copy or spread without authorization is prohibited 22 Fig 6 1 Serial flow chart...

Страница 24: ...t current measurement 0 1 standard impedance should be adopted if the output current is less than 2 5A while a 0 01 standard impedance is recommended if the output current is over 2 5A l Load the load...

Страница 25: ...of output current Wiring as shown in Figure 7 2 the instrument works in the constant current state CC indicator lights up adjusted the output current to the test points within the limited range of DC...

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