User Guide
Contents
1. The wire which is coloured Blue must be connected to the terminal which is marked with the letter N or coloured Blue or Black The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red If in doubt consult the instructions provided with the equipment or contact the supplier ii PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL CERE This cable appliance should be protected by a suitably rated and approved HBC mains fuse refer to the rating information on the equipment and or user instructions for details As a guide cable of 0 75mm should be protected by a 3A or 5A fuse Larger conductors would normally reqiire 13A types depending on the connection method used Any moulded mains connector that requires removal replacement must be destroyed by removal of any fuse amp fuse carrier and disposed of immediately as a plug with bared wires is hazardous if a engage d in live socket Any re wiring must be carried out in accordance with the information detailed on this label PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL a PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL CENE 1 PRODUCT INTRODUCTION 1 1 Description PST series Programmable Power Supply is controlled by Micro Processor Unit MPU that can easily comect communication interface RS232 or GPIB to computer in order to satisfy users demand for auto esting and2. 5 11 Test Lead PST 3201 PST 3202 3A 3A Note When use PST 3202 in parallel output needs to use Current 4A 10A test lead 5 12 The setting for the GPIB and RS232 Interface If you have PST series programmable power supply use the GPIB RS232 LOCAL control to set or read the GPIB and RS 232 interface please refer to the IST series Programmer Manual for more details PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL CERE 6 MAINTENANCE WARNING The following instructions are executed by qualified personnel only To avoid electrical shock do no perform any servicing other than the operating instructions unless you are qualified to do so Warning Do not remove covers Refer servicing to qualified personnel l Warning No operator serviceable components inside 6 1 Fuse Replacement If the fuse blows the display will not light and the power supply will not operate The fuse should not normally open unless a problem has developed in the unit Try to determine and correct the cause of the blown fuse then replace only with a fuse of the correct rating and type refer to 32 of page 5 The fuse is located on the rear panel see Fig 4 2 WARNING For continued fire protection Replace fuse only with 250V fuse of the specific type and rating and disconnect power cord before replacing fuse PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL 6 2 Line Voltage Conversion The primary wind
3. 10 6 50 60Hz Mechanical Spe Operation Indoor use Environmental Altitude up to 2000 m Ambient temperature To satisfy specifications 10 C to 35 C 50 F to 95 F Maximum operating ranges to 40 C 32 F to 104 F Relative humidity 85 RH max non condensing Installation Category II Pollution degree 2 Sorage Temperature amp 10 to 70 C 70 RH maximum Humidity Po wer Accessories Instruction manual PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL CERE 3 PRECAUTIONS BEFORE OPERATION 3 1 Unpacking the Instrument The product has been fully inspected and tested before shipping from the factory Upon receiving the instrument please unpack and inspect it to check if there is any damage caused during transportation If any sign of damage is found notify the bearer and or the dealer immediately 3 2 Checking the Line Voltage The product can be applied by any kind of line voltages shown in the table below Before connecting the power plug to an AC line outlet make sure the voltage selector of the rear panel is set to the correct position corresponding to the line voltage It might be damaged the instrument by connecting to the wrong AC line voltage WARNING avoid electrical shock the power cord N protective grounding conductor must be connected to ground When line voltages are changed replace the required fuses shown as below Line Line Mo
4. 2 and SCPI compatible command setting 14 0 1 sec timer for output working loop Auto step running 15 Correspond to UL CSA CE and LVD safety regulation PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL 2 TECHNICAL SPECIFICATIONS Output vr css Re Soure Effe 10mV 20mV rating voltage gt 36V F0 05 10mV 20mV rating voltage gt 36V lt 0 1 5mA 10mA rating voltage gt 3 5A 0 05 10mV 20mV rating voltage gt 36V Voltage RippleS ImVrms 3mVp p Noise lt 2mVrms 30mVp p lt S 5mArmsrating current gt 3 0A Temperature lt 100ppm 3mV Coefficient 0 40 C 100ppm 3mA Readback Resolution Response Time Voltage Up 10 90 100115 Voltage Down 90 10 lt 100ms 2 10 rating load Readback Voltage 100ppm 10mV 20mV rating voltage gt 36V Temperature Coefficient lt 150ppm 10mA 100ppm 10mV 20mV rating voltage gt 36V Current E 150ppme10mA Ripple amp Noise 20Hz 20MHz PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL Tracking E Operation Series Load lt 20mV Effect E Voltage 0 05 10mV 20mV rating voltage gt 36V Current 0 1 10mA OVP 0 05 10mV Load Effect Voltage 3m V 5mV rating current gt 3 0A Current 6mA Source Effect Voltage S 3mV Current X 6mA Memory SerP RecillpoimisU 99 Timer nterface RS232 GPIB interface option Power Source ACI00V 120V 220VH0 230V
5. 28 7 THE SYSTEM DIAGRAM AND DESCRIPTION 29 7 1 Block 29 7 2 The Operation of the whole 30 i PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL SAFETY TERMS AND SYMBOLS These terms may appear in this manual or on the product WARNING Warning statements identify condition practices that could result in injury or loss of life practices that could result in damage to this product or CAUTION Caution statements identify conditions or other property The following symbols may appear in this manual or on the product A DANGER ATTENTION Protective Earth ground Frame or Chassis High Voltage refer to Manual Conductor Terminal Terminal Terminal PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL I FOR UNITED KINGDOM ONLY NOTE This lead appliance must only be wired by competent persons WARNING THIS APPLIANCE MUST BE EARTHED IMPORTANT The wires in this lead are coloured in accordance with the following code Green Yellow Earth Blue Neutral Brown Live Phase As the colours of the wires in main leads may not correspond with the colours marking identified in your plug appliance proceed as follows The wire which is coloured Green amp Yellow must be connected to the Earth terminal marked with the letter E or by the earth symbol or coloured Green or Green amp Yellow
6. 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL CENE the knob to END and press ENTER to leave voita fe Current F Note Now the calibrated data of channel 1 has not yet been stored If the calibration is aimed at channel 1 only can set the cursor to Save by using the knob and press ENTER to finish the procedure with storing If want to cancel the calibration using the knob to set the cursor to EXIT and press ENTER to terminate the procedure without storing The calibration procedure as mentioned above can be aimed at channel 2 and channel 3 only Step 6 Repeat above calibration steps on channel 2 and channel 3 Step 7 Parallel Calibration steps Set the cursor to parallel by using the knob and press ENTER getting into parallel current calibration procedure Step 7 1 After the proper measured setting has been done according to the steps displayed by the window press again ENTER to get into the operand procedure of parallel current calibrated value Step 7 2 After the operand procedure of Parallel current calibration value has been completed and the proper measured setting has been done according to the steps displayed in the window press ENTER to get into the window for Parallel Current MAX calibrated value input PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL CENE Step 7 3 Input Parallel current measured value directly by using the number key and press ENTER to compl
7. If want to cancel the setting just set to Exit and press ENTER to terminate the setting without storing Information Copy Setting Press SHIFT STORE getting into item selection picture select Copy press ENTER getting into Copy setting picture select the modified item and input copy address and press ENTER After modification select Save and press ENTER to complete the setting and storing If want to cancel the setting just set to Exit and press ENTER to terminate the setting without storing Note Do not repeat the address of Source and Target input also PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL the value of End must be larger than Start s Source Start Source End 91 Target Start 01 Target End 91 p 5 6 Auto operation Mode Delay Time Setting Press DELAY getting into item selection picture using the knob to set cursor to the wanted setting item and input the time directly by using number key and press ENTER Finally using the knob to set the cursor to End and press ENTER to complete the setting The Delay Time setting has to be further stored in the specific place of the memory address according to the procedure of 5 4 Information Storing setting Please note when the storing procedure is proceeding all the other settings of the instrument will be also stored in the same place of memory address If want to cancel the setting set the cursor to Exit by using th
8. PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL Example 1 Set GPIB as communication interface and set address at 10 Press SHIFT GPIB RS 232 getting into item selection picture using the knob to set the cursor to interface and press ENTER to appear interface selection picture using the knob to set the cursor to GPIB press ENTER Then using the knob to set the cursor to address and input address setting value directly by using the number key and press ENTER Finally set the cursor to Save by using the knob and press ENTER to complete the setting and storing 2 Set RS 232 as communication interface and Baud Rate at 9600 Press SHIFT GPIB RS 232 getting into item selection picture using the knob to set the cursor to interface and press ENTER to appear interface selection picture set the cursor to RS 232 by using the knob and press ENTER After using the knob to set the cursor to Baud Rate by using the knob and press ENTER set the cursor to 9600 and press ENTER Finally set the cursor to Save and press ENTER to complete the setting and storing 5 10 The Maximum Setting Value Output Current 11 1 LIA 21A 21 5 2 34 3 34V 8V 10V iv Step Current 05 05 OSA ia 1 254 Delay Time 99 59 99 59 H2 3V 3V veevotage 10 tov 1v 1A PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL
9. a relative voltage value to control the whole output circuit through a driver circuit and generate the required output voltage The current sense circuit for detecting the voltage value from current sense resistor is mainly composed by differential amplifier TLO71 The multiple of the differential amplifier is A R355 R356 22 0K 1 91K 11 518 the voltage on the both sides of current sense resistor is 3 276 11 518 0 285V the output current is basis Tout 0 285 R374 2 0 285 0 3 2 1 9A and 2 1A making multiple operand to get a real output current by using the software The Displayed Value of Voltage and Current The voltage current sense circuit retrieves a voltage value which will be sent to Comparator through Analog Switch and joined with the output voltage of DAC in dichotomy approaching method to get the same voltage as the real output value of the instrument PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL
10. set the cursor to voltage by using the knob and press ENTER getting into voltage calibration procedure Step 3 1 After the proper measured setting has been done according to the step displayed in the window press again ENTER to get into voltage value input window Step 3 2 Input measured voltage value directly by using the number key and press ENTER to complete the measured voltage MIN input When the value has been input by mistake but not yet pressed ENTER can use the knob to clear the value Note The DMM selected for the measurement must have the PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL resolution of three digits of the decimal point at least 1mV Also the input value is to take two digits of decimal point of effective value 10mV and run off the rest Step 3 3 After the proper adjustment of measured value has been done according to the step displayed in the window press ENTER to complete Maximum voltage adjustment The DMM selected for the measurement must have the resolution of three digits of the decimal point at least 1mV Note During the adjustment the maximum distortion range of the measured value is at 0 005V Step 4 Current Calibration Steps Set the cursor to Current by using the knob and press ENTER getting into Current calibration procedure Step 4 1 After the proper measured setting has been done according to the step displayed by the window pr
11. ER again to complete the setting and storing If want to cancel the setting move the cursor to EXIT and ENTER with knob to terminate the setting without storing LEM SE CH1 Voltage CH3 Voltage CH3 Current Example Set the step voltage of Channel 1 at 1 00V and the step current at 0 10A Press SHIFT STEP elect CH1 Voltage and input 1 O O ENTER then select Current and input 0 1 0 O EN TER Finally using the knob to move the cursor to SAVE and press ENTER to complete the setting and storing Note The setting of the Step voltage and Step current of CH1 CH2 CH3 can be proceeded at the same display window 5 4 Information Storing and Recalling setting Information Storing Setting Press SHIFT STORE getting into item selection picture using PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL the knob to set cursor to STORE and press ENTER to appear memory storing picture then using number key to key in store address and press ENTER to complete the setting and storing Memor Example The current setting store address of instrument is at 00 Press SHIFT STORE getting into item selection picture using the knob to set the cursor to STORE then press ENTER and input 0 O ENTER directly to complete storing setting Information Recalling Setting Press SHIFT RECALL getting into item selection picture using the knob to set th
12. PST 3201 3202 PROGRAMMABLE POWER SUPPLY Declaration of Conformity USER MANUAL We GOOD WILL INSTRUMENT LTD No 95 11 Pao Chung Rd Hsin Tien City Taipei Hsien Taiwan declares that the below mentioned product PST3201 PS E3202 are herewith confirmed to comply with the requirements set out in the Council Directive on the Approximation of the Law of Member States relating to Electromagnetic Compatibility 89 366 EEC 92 31 EEC 93 68 EEC and Low Voltage Equipment Directive 73 23 EEC For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Equipment Directive the following standards were applied EMC EN 61326 1 Electrical equipment for measurement control and laboratory use EMC requirements 1997 1 1998 EN 55011 1991 A1 1997 A2 1996 EN 61000 4 2 1995 EN 61000 3 2 1995 A1 1998 2 1998 14 2000 EN 61000 4 3 1996 EN 61000 3 3 1995 EN 61000 4 4 1995 EMEN EN 61000 4 5 1995 EN 61000 4 6 1996 _ EN 61000 4 11 1994 Safety Low Voltage Equipment Directive 73 23 EEC amp amended by 93 68 EEC EN 61010 1 1993 A2 1995 IEC 1010 1 1990 A2 1995 USA UL 3111 1 First Edition June 1994 Canada CSA C22 2 No 1010 1 92 PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL I CONTENTS PAGE 1 PRODUCT INTRODUCTION cssssssssesssessecsseesseesseeres 1 1 1 Descriptio essensen s ereenn essee snos oreen a 1 1 2 KEET a S P A T E e
13. SET and using number key to key in voltage value then press ENTER Method 2 Press V SET and using knob to input voltage value the output voltage setting will be changed immediately then press ENTER to terminate the voltage setting Obviously using this method the output voltage will be changed immediately following the input value through knob Example Set voltage at 32 00V Press V SET 3 2 0 O EN TER Output Current Setting Method 1 Set output current by pressing I SET and using number key to key in current value and ENTER Method 2 Press I SET and using knob to input current value the output current setting will be changed immediately then press ENTER to terminate the current setting Obviously using this method the output current will be changed immediately following the input value through knob PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL CENE Example Set current at 1 000A Press I SET 1 0 0 O ENTER When the load current through output terminal exceeds the setting value the instrument is operated in the C C mode if not exceeds the setting value the instrument is operated in the C V mode 5 2 Over Voltage Current Protection Setting At first select the wanted channel by pressing SHIFT CHx now the cursor is set to CHx x 1 2 or 3 Over Voltage Protection Setting Method 1 Set OVP voltage level by pressing OVP SET and using number key to key i
14. V Mode the MPU will send 3300 counts 33 00V of output voltage to DAC output through analog switch and Sample Hold circuit the voltage now is at around 5 148V 1 56mVx3300 5 148V Then compare this voltage with the real output voltage which is retrieved by the voltage sense circuit As the entire circuit is a close loop therefore the retrieved voltage value will be followed with the reference voltage of Sample Hold Besides the Comparator output terminal will output a relative voltage value to control the whole output circuit through a driver circuit and generate the required output voltage The attenuation of the voltage sense circuit is A R342 R342 R335 4 99K 4 99K 27 0K 0 156 and the output voltage is Vout 5 148 A 5 148 0 156 33 00V If the output is affected by the offset of materials can use the Vr to make adequate adjustment C C Mode PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL The operation in C C Mode is similar to that in C V Mode The MPU will send 2100 counts 2 1A output current to DAC output through analog switch and Sample Hold circuit the voltage now is at around 3 276V 1 56mVx2100 3 276V Then compare this voltage with the real output voltage which is retrieved by the current sense circuit As the entire circuit is a close loop therefore the retrieved voltage value will be followed with the reference voltage of Sample Hold Besides the Comparator output terminal will output
15. ative output terminal Connect the ground terminal to chassis Wheel knob Output voltage setting Switch to channel 1 by pressing SHIFT CH1 to proceed group setting Output current setting Switch to channel 2 by pressing SHIFT CH2 to proceed group setting Over voltage protection value setting Switch to channel 3 by pressing SHIFT CH3 to proceed group setting Switch to wheel knob for coarse and fine adjustment Proceed the STEP setting by pressing SHIFT STEP Recall the next group of stored information Proceed information storing and editing by pressing SHIFT STORE Recall previous stored information Recall the pointed stored information or set the range to recall information automatically by pressing SHIFT RECALL Turn on off automatic operation function by setting the AUTO on or off Operate the instrument in the parallel mode by pressing SHIFT PARA and back to independent mode by pressing the keys again Set the voltage and current output time in the TRACK INDEPT automatic operation m ode PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL 20 21 22 23 24 25 26 27 28 OCP OVP RESET SHIFT Local GPIB RS232 Contrast W IA IV VA VV Output 0 9 ENTER AC Power Socket AC Select Switch Cooling Fan Interface Operate the instrument in the series mode by pressing SHIFT TRACK and back to indep
16. auto control The voltage and current are completely controlled by 12 bits D A Converter with higher resolution and accuracy Also the digitalization of system makes a speedy precise and convenient input of information controlled by keyboard The adjustment of voltage current is made by software calibration without manual error that will increase the preciseness of the instrument The function of Over Voltage Protection OVP and Over Current Protection OCP is set with software and detected with hardware to achieve protected function precisely and speedily in order to secure users from danger by using the instrument 1 2 Feature 1 An overall digitalization of programmable interface with high resolution 2 The 192 128 LCD Display can appear multiple settings and measurement results simultaneously The display mode is changeable PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL 3 Intuitional intelligent interface window display is convenient for user tooperate the instrument 4 High stability and low draft 5 The function of over voltage current temperature protection 6 Intelligent control fan Vary with different output power 7 Warning signal by the built in Buzzer 8 Step by step calibration procedure 9 Brand new panel design and the 1 2 rack size reduction volume design 10 Wheel knob of Fine and Coarse 11 100 groups storage space setting 12 Parallel and series operation modes 13 IEEE 488
17. del Range Fuse Range Fuse voltage voltage PST 3201 100V 90 110V 250V 220V 198 242v 250V 120V 108 132V T3A 230V 216 253V PST 3202 SOV PST 3201 3202 PROGRAMMABLE POWER SUPPLY PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL USER MANUAL 4 PANEL INTRODUCTION WARNING To avoid personal injury disconnect the power cord before removing the fuse holder 3 3 Environment The normal ambient temperature range of this instrument is from 0 to 40 C 32 INDEP Coarse 33 00V0 000KV 32 to 104 F To operate the instrument exceeding this specific 33 00V0 0002cV 6 000V0 000KV temperature range may cause damage to the circuits of instrument Do not use the instrument in a place where strong magnetic or electric field exists as it may disturb the measurement Figure 4 1 Front Panel PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL Figure 4 2 Rear Panel NAW YW 10 11 12 13 14 PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL Power Switch Display Output Terminal Output Terminal GND Terminal Rotary Encoder V Set CH1 I Set CH2 OVP Set CH3 F C STEP RecallA Store RecallV Recall AUTO PARA INDEP Delay Connect the AC power then press power switch Indicate the setting of voltage current value output voltage current value and the status of setting and output Positive output terminal Neg
18. e knob and press ENTER to terminate the setting without storing Minute Second Exit Auto operation Press SHIFT RECALL getting into item selection picture using the knob to set cursor to recall range and press ENTER to appear the picture of auto operation setting set the cursor to the item to be 8 PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL Gd modified by using the knob and using the number key to input auto operation setting value and press ENTER After modification using the knob to set the cursor to Save and press ENTER to complete the setting and storing If want to cancel the setting just set the cursor to Exit by using the knob and press ENTER to terminate the setting without storing gtart BB ue Fine Cycle 62 aU Note When input 00 repeatedly can select Cycle setting 5 7 Parallel Operation Mode Press SHIFT PARA getting into parallel operation mode In this mode output voltage and current are mainly operated in channel 2 The settable range of output voltage is same as channel 2 while the settable range of output current is two times of channel 2 Example 1 Channel 1 Voltage 10V Current 1A 2 Channel 2 Voltage 20V Current 2A 3 Press SHIFT PARA getting into parallel mode 4 Output voltage 20V output current 4A 5 8 Track Operation Mode Press SHIFT TRACK getting into Track Operation Mode In this mode output voltage and c
19. e cursor to Recall Memory press ENTER to appear memory recalling picture then input recalling address by using number key press ENTER to complete recalling setting Example Recall the storing address 00 to the current setting status of instrument Press SHIFT RECALL getting into item selection picture using the knob to set the cursor to Recall Memory Press ENTER and input 0 O ENTER to complete recalling setting PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL 5 5 Information Editing and Copying Setting Information Editing Edit Setting Press SHIFT STORE getting into item selection picture using the knob to set the cursor to Edit press ENTER to appear memory editing picture then input editing address by using number key and press ENTER to appear editing selection picture now using the knob to set cursor to the editing item which wants to be modified its setting and input directly its setting value or on off status by using the number key press ENTER to proceed modification After the modification is completed set the cursor to End by using the knob and press ENTER to complete the setting If want to proceed the other setting modification jist return to previous editing item picture and repeat above mentioned procedures When the modification is completed using the knob to set the cursor to SAVE press ENTER to complete information edit setting and storing
20. e esse ode 1 2 TECHNICAL SPECIFICATIONS eee 3 3 PRECAUTIONS BEFORE 5 3 1 Unpacking the Instrument eese 5 32 Checking the Line Voltage cese 5 3 3 EmvironmMent scscecececccececsecerecsececeees secon 6 4 PANEL 7 5 OPERATION 11 5 1 Output Voltage Current Setting sess 11 52 Over Voltage Current Protection Setting 12 5 3 Voltage Current Step Setting cesses 13 54 Information Storing amp Recalling Setting 13 5 5 Information Editing amp Copying Setting 15 5 6 Auto Operation Mode eee 16 5 7 Parallel Operation Mode eee 17 5 8 Track Operation Mode eee 17 5 9 GPIB RS 232 Interface 18 5 10 The Maximum Output Setting Lecce 19 5 11 Test Lead oeer n o s T TE ninas 20 5 12 The Setting of the GPIB and RS232 Interface 20 6 MAINTENANCE ie conse cave cance 21 6 1 Fuse Replacement cscccecesecsceccscecececvesececs 21 62 Line Voltage 21 6 3 Adjustment and Calibration eese 22 6 4 Cleaning ccsececcececcccecececcesececeesesecsesesensees
21. ectly onto the instrument since it may leak into the cabinet and cause damage Do not use chemicals containing benzine benzene toluene xylene acetone or similar solvents Do not use abrasive cleaners on any portion of the instrument PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL 7 THE SYSTEM DIAGRAM AND DESCRIPTION 7 1 Block Diagram AC RELAY SERIES OP INPUT TRANSFORMER REGULATOR AMPLIFIER REFERENCE AUX RECTIFIER DTOA AND ALTER CONVERTER LCM MICRO DISPLAY CONTROL KEYBOARD TRACK AND PARALLEL CONTROL INTERFACE VOLTAGE ANALOG COMPARATOR SWITCH AND SAMPLE HOLD RS 232 OR GPIB CH3 The graph above is the system diagram of PST SERIES Which consists of Micro Processor Unit MPU Digital to Analog Converter DAC Analog Switch Circuit Reference Voltage Circuit Driver Circuit Control Circuit Track Parallel Circuit Comparator and etc PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL CENE 7 2 The Operation of the whole circuit Each output channel of PST series has a reference voltage circuit at around 2 5V output voltage which can be amplified to 2 5 1 R314 R315 Vr 2 5 1 12 4K 7 68K Vr by a non inverter amplifier When Vr 0 500 take its middle value to convert above formula into 6 41V and treat this as the reference voltage of DAC AD7541 The AD7541 is a 12 bit DAC with 6 41V 4095 1 56mV bit of the resolution C V Mode When the instrument is in C
22. endent mode by pressing the keys again Turn on off the over current protection function by setting the OCP on or off Release the over voltage protection mode by pressing SHIFT OVP RESET The second function selection Clear the remote control mode to use panel control setting instead Set to GPIB or RS232 by pressing SHIFT GPIB RS 232 Proceed the contrast adjustment of the display by pressing SHIFTJ CONTRAST Set beeper by pressing SHIFT IJ to turn on off the buzzer Press SHIFT W to change the character size Under the status of SHIFT press to ascend one step of current value for output Under the status of SHIFT press IV to descend one step of current value for output Under the status of SHIFT press V to ascend one step of voltage value for output Under the status of SHIFT press VV to descend one step of voltage value for output Turn on or off output by pressing the knob Value input AC power input terminal Switch Voltage to 100V 120V 220V or 230V 50 60Hz A cooling fan GPIB or RS 232C communication interface PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL 5 OPERATION METHOD 5 1 Output Voltage Current Setting At first select the wanted channel by pressing SHIFT CHx now the cursor is set to CHx x 1 2 or 3 Please refer to the drawing 26 INDEP Fine Output Voltage Setting Method 1 Set output voltage by pressing V
23. ess again ENTER to get into current MAX value input window Step 4 2 Input measured current value directly by using the number key and press ENTER to complete the measured current MAX input When the value has been input by mistake but not yet pressed ENTER can 22 0947 uL PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL use the knob to clear the value Note The DMM selected for the measurement must have the resolution of four digits of the decimal point at least 0 1mA Also the input value is to take three digits of decimal point of effective value 1mA and run off the rest Step 4 3 Press again ENTER getting into the window for current calibrated value input Step 4 4 Input measured current value directly by using the number key and press ENTER to complete the measured current MN input When the value has been input by mistake but not yet pressed ENTER can use the knob to clear the value Note The DMM selected for the measurement must have the resolution of four digits of the decimal point at least 0 1mA Also the input value is to take three digits of decimal point of effective value 1mA and run off the rest and inal and Step 5 Set the cursor to O V P by using the knob and press ENTER getting into Over Voltage Protection auto calibration procedure Step 5 1 After the O V P auto calibration is completed set the cursor by using PST 3201
24. ete the Parallel current MAX measured value input When the value has been input by mistake but not yet pressed ENTER can use the knob to clear the value Note The DMM selected for the measurement must have the resolution of four digits of the decimal point at least 0 1mA Also the input value is to take three digits of decimal point of effective value 1mA and run off the rest Step 7 4 Press again ENTER getting into the window for Parallel current calibrated value input Step 7 5 Input Parallel current measured value directly by using the number key and press ENTER to complete the Parallel current MIN measured value input When the value has been input by mistake but not yet pressed ENTER can use the knob to clear the value Note The DMM selected for the measurement must have the resolution of four digits of the decimal point at least 0 1mA Also the input value is to take three digits of decimal point of effective value 1mA and run off the rest PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL EE Step 8 Set the cursor to Save by using the knob and press ENTER to terminate the calibration with storing If want to cancel the calibration using the knob to set the cursor to EXIT and press ENTER to terminate the procedure without storing 6 4 Cleaning To clean the power supply use a soft cloth dampened in a solution of mild detergent and water Do not spray cleaner dir
25. ing of the power transformer is tapped to permit operation from 100 120 220 or 230VAC 50 60 Hz line voltage Conversion from one line voltage to another is done by change AC selects switch The rear panel identifies the line voltage to which the unit was factory set To convert to a different line voltage perform the following procedure 1 Make sure the power cord is unplugged 2 Change the AC selects switch to the desired line voltage position 3 A change in line voltage may also require a corresponding change of fuse value Install the correct fuse value as listed on rear panel 6 3 ADJUSTMENT AND CALIBRATION Preparation 1 30 minutes warm up before calibration 2 Ambient temperature 23 45 C Humidity Under PH80 Output Calibration Steps Step 1 Press SHIFT to appear Password input window input Password vary with different models PST 3202 3202 PST 3201 3201 by using the number key press ENTER key When the value has been PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL CENE input by mistake but not yet pressed ENTER can use the knob to clear the input value Step 2 When get into Calibrated item selection window set the cursor to the calibrated item by using the knob and press ENTER After the calibrated item is selected proceeding voltage current and over voltage calibration step by step Step 3 Voltage Calibration Steps After the channel is selected
26. n voltage value then press ENTER Method 2 Press OVP SET and using knob to input voltage value the OVP voltage level setting will be changed immediately then press ENTER to terminate the OVP voltage level setting Obviously using this method the OVP voltage level will be changed immediately following the input value through knob Example Set OVP voltage at 33 00V Press OVP SET 3 3 0 0 ENTER OVP Status Clear Up When the output voltage exceeds 33 00V of the setting voltage the output of the instrument will be off and get into OVP mode by displaying Over Voltage Protection on the panel Now press SHIFT OVP RESET to clear OVP status back to previous status Over Current Protection Setting Turn on off the OCP of each channel individually by pressing OCP If OCP is on when the output current equals or exceeds PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL the current value setting the output of the instrument will be off and get into over current protection mode by displaying Over current protection on the display Press OCP to clear OCP status and back to previous status 5 3 Voltage Current Step Setting Press SHIFT STEP getting into the item selection picture using the knob to set cursor to the setting item which you want to modify input directly the wanted value and press ENTER Store the setting by using the knob to move the cursor to SAVE then press ENT
27. urrent are mainly operated in channel 2 The settable range of output voltage is same as channel 2 but the output current can be set with different value Example 1 Channel 1 Voltage 10V Current 2A PST 3201 3202 PROGRAMMABLE POWER SUPPLY USER MANUAL 2 Channel 2 Voltage 20V Current 2A 3 Press SHIFT TRACK getting into track mode 4 Output voltage 40V output current 2A WARNING Voltage more than 60V DC is a lethal shock hazard to the user Be careful when connecting power N supplies in series to achieve voltages higher than 60VDC totally or 60VDC between any connection and earth ground 5 9 GPIB RS232 Interface Setting Press SHIFT GPIB RS 232 getting into item selection picture using the knob to set the cursor to Interface and press ENTER to appear interface selection picture set the cursor to the item to be modified by using the knob and press ENTER Then set the cursor to Address or Baud Rate setting area if want to modify the address directly using the number to input address setting value and press ENTER if want to modify the Baud Rate first press ENTER then using the knob to set the cursor to the setting value to be modified and press ENTER Finally set the cursor to Save by using the knob and press ENTER to complete the setting and storing If want to cancel the setting set the cursor to Exit by using the knob and press ENTER to terminate the setting without storing
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