safety terms and symbols for united kingdom only
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1. Test Equipment Depot 99 Washington Street Melrose MA 02176 6024 PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL Constant Voltage Range o Crossover Point Constant Current Range Output Voltage Output Current Figure 5 1 Constant Voltage Constant Current Characteristic Similarly crossover from the constant current to the constant voltage mode automatically occurs from a decrease in load a good example of this would be seen when charging a 12 volt battery Initially the open circuit voltage of the power supply may be preset for 13 8 volts A low battery will place a heavy load on the supply and it will operate in the constant current mode which may be adjusted for a 1 amp charging rate As the battery becomes charged and its voltage approaches 13 8 volts its load decreases to the point where it no longer demands the full 1 amp charging rate This is the crossover point where the power supply goes into the constant voltage mode 5 2 Output Voltage Current Setting At first set to voltage current setting window or output value displayed window Output Voltage Setting Switch the flashed cursor to voltage input position by pressing Vset Iset key and modify the setting value by using the wheel pane www testequipmentdepot com 800 517 8431 781 665 0780 FAX PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL SSS _ _SSaa _ _ _L__ _E_SSS2. Z knob Now use the F C key to input the integral or dismal Set20 00U 18 00A Example Set voltage at 20 00V Switch the cursor to mV range by using the F C key and adjust the value to number 00 with the rotation knob then switch the cursor to V range by using the F C key number and adjust the value to number 20 with the rotation knob to complete the modification PS At the moment if the OUTPUT is on the output voltage will be output the corresponding voltage value immediately following the adjustment of the rotation knob Output Current Setting Switch the flashed cursor to current input position by pressing Vset Iset key and modify the setting value by using the wheel knob Now use the F C key to input the integral or dismal number Example Set voltage at 18 00A Switch the cursor to mA range by using the F C key and adjust the value to number 00 with the rotation knob then switch the cursor to A range by using the F C key and adjust the value to number 18 with the rotation knob to complete the modification PS When the load current of output terminal exceeds the current setting value the instrument is operated under the Constant Current mode C C Mode if it doesn t exceed the current setting value the instrument is operated under the Constant Voltage mode C V Mode If the maximum output voltage of the instrument is larger than 36V the minimum adjustable step of the rotation knob is
3. eat e Test Equipment Depot 99 Washington Street PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL 20mV if it is smaller than 36V the minimum adjustable step of the rotation knob is 10mV 5 3 Over Voltage Current Protection Setting 5 4 5 5 5 6 Over Voltage Protection Setting Set to OVP SET window by pressing MENU modify the OVP setting value with F C key to input integral or dismal number then press ENTER OVP Status Clear Up When the output voltage exceeds the setting voltage the instrument will stop output and get into OVP mode by displaying OVP Error Press LOCAL to reset messages on the panel Now press LOCAL to clear OVP status back to previous status Over Current Protection Setting Set to OCP SET window by pressing MENU then switch OCP to ON or OFF with the knob and press ENTER When the OCP is on the output current equals or exceeds the setting current the instrument will stop output and get into OCP mode by displaying OCP Error Press LOCAL to reset messages on the panel Now press LOCAL to clear OCP status back to previous status Display Contrast Setting Set to Contrast Setting window by pressing MENU modify the Contrast setting value with knob then press ENTER Buzzer Setting Set to Buzzer Set window by pressing MENU switch Buzzer to ON or OFF with the knob then press ENTER GPIB RS232 Interface Setting Set to Interface window by pr
4. avoid open circuit without equipping with Relay Switch and Connector When the open circuit is occurred abruptly on the sensing circuit it will cause overshoot on the output terminal To prevent this kind of phenomenon add small resistance R1 and R2 or replace with diode as shown in the Figure 5 4 Power supply ii Figure 5 4 The power supply with remote error sensing protection Test Equipment Depot 99 Washington Street Melrose MA 02176 6024 PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL _ _ i _ i ___ SS At first set the DMM to 200V voltage range www testequipmentdepot com 800 517 8431 781 665 0780 FAX PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL Step 2 1 Get into the window of Calibration item select the item of Voltage calibration with knob and press ENTER Step 2 2 Input measured voltage value Min with the knob and press ENTER During the value input use F C key to switch over the integral or dismal number input Step 2 3 Now adjust VR301 properly for the measured voltage Max of DMM according to the value displayed in the window then press ENTER Note During the adjustment the maximum distortion range of the measured value is at 0 005V Step 3 Current Calibration Steps At first make sure the output is disconnected with test leads if the specifi
5. 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 Test Equipment Depot 99 Washington Street Melrose MA 02176 6024 PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL be _ _ _ _ __ L SS gt 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 require 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 engaged in live socket Any re wiring must be carried out in accordance with the information detailed on this label iv www testequipmentdepot com 800 517 8431 781 665 0780 FAX PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL SS S SS _ _ _ LEE 1 PRODUCT INTRODUCTION 1 1 Description PSH series Programmable Power Supply is wntrolled by Micro Processor Unit MPU that can easily connect communication interface RS 232 or GPIB to comput
6. terminal Power supply Figure 5 2 The power supply with local error sensing 781 665 0780 FAX Test Equipment Depot 99 Washington Street Melrose MA 02176 6024 www testequipmentdepot com 800 517 8431 781 665 0780 FAX PSH SERIES PROGRAMMABLE POWER SUPPLY PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL USER MANUAL a _ _ EES Ello The function of the Remote Error Sensing can only be applied to the 5 8 Test Lead Selective Table Constant Voltage mode as shown in Figure 5 3 The feedback point Wh se PSH SER models supply the test lead st of power supply must start from the load terminal directly Therefore en wese PSH S sa i Pe is aia ee aa IAE the power supply can display its function on the load terminal have a sengugh current Capacity tonprevent trom damaged she instead of output terminal To compensate the voltage drop causing following is test lead selective table shows the maximum current from the test lead it needs to shift the voltage from the output terminal of power supply and the voltage on the load terminal remains unchanged rating based on 450A cm A large test lead is recommended in order to reduce the voltage drop as less as better on the test lead typical 0 5V maximum Power supply Wire Size Max Current Wire Size Max Current AWG A AWG A Figure 5 3 The power supply with remote error sensing Error Sensing Open Protection The sensing circuit must
7. 328 Unit 2 When the power reaches about 2 times the Unit 1 the Unit 2 will be used additionally Unit 3 When the power reaches about 3 times the Unit 1 the Unit 2 and Unit 3 will be used additionally 9G eS
8. Test Equipment Depot 99 Washington Street Melrose MA 02176 6024 PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL SAFETY TERMS AND SYMBOLS These terms may appear in this manual or on the product A A WARNING Warning statements identify condition or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property The following symbols may appear in this manual or on the product AN DANGER A 7A ATTENTION Protective Earth ground Frame or Chassis High Voltage refer to Manual Conductor Terminal Terminal Terminal www testequipmentdepot com 800 517 8431 781 665 0780 FAX PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL 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 Dj or coloured Green or Green amp Yellow The wire which is coloured Blue must be connected to the terminal which
9. cation of current is smaller than 20A can either use 20A range of GDM 8145G or connect current shunt to output terminal to measure the output current If the specification of current is larger than 20A must connect current shunt to output terminal to measure both ends of the current shunt with 200mV range of DMM Step 3 1 Get into the window of Calibration item select the item of current calibration with knob and press ENTER to startCurrent Calibration Steps Step 3 2 Input measured voltage value Max with the knob and press 1293 ta Test Equipment Depot 99 Washington Street Melrose MA 02176 6024 www testequipmentdepot com 800 517 8431 781 665 0780 FAX PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL _ _ __ _ _ _ L _ 7 2 The Configuration of PSH series Block System The whole Block system consists of the following Circuit Blocks Power Factor Corrector BD101 Q101 Q103 D102 Micro Processor Unit MPU U308 Digital to Analog Converter DAC U316 Analog Switch Circuit U328 R356 R363 R370 C314 C318 C320 U331 Pulse Width Modulation U206 Driver Circuit Q202 Q203 T202 Power Stage Q204 Q205 Q211 Q212 T203 D207 D208 L201 C246 C249 C253 Post Regulator Q207 Q208 Voltage Control Circuit U334 Current Control Circuit U334 Error Amplifier U333 Opto isolator U209 Auxiliary Power suppl Q201 U203 T201 OVP U315 U331 Q209 U327 Q310 U
10. er in order to satisfy user s demands for auto testing and autocontrol The series of products have improved greatly the shortage of the tradit ional big size heavy weight products 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 the keyboard and rotation knobs 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 prevent users from danger by using the instrument 1 2 Features 1 Wide Input Voltage Range and High Power Factor P F 2 High Efficient 3 Constant Voltage and Constant Current Operation 4 The protection for Over Voltage Over Current and Over Heat Test Equipment Depot 99 Washington Street Melrose MA 02176 6024 www testequipmentdepot com 800 517 8431 781 665 0780 FAX PSH SERIES PROGRAMMABLE POWER SUPPLY PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL USER MANUAL 5 Screw the AC input cover to the AC terminal on the rear panel e Front Panel tightly The stripped wired must be wrapped up with an isolated duct for safety Figure 2 10 11
11. essing MENU If the GPIB is displayed the Address value window will be appeared if the RS 232 is displayed the Baud Rate window will be appeared then Ss 6 Melrose MA 02176 6024 www testequipmentdepot com 800 517 8431 PSH SERIES PROGRAMMABLE POWER SUPPLY USER MANUAL S S SSS a ah_ _ _ L_ Z using the wheel knob to modify the value and press ENTER to complete the setting Note The system will detect the interface used at present automatically and switch the detected interface over the setting interface of GPIB or RS 232 Example 1 If want to set the GPIB address value to 08 Set to interface window by pressing MENU and adjust the address value to 08 with the wheel knob and press ENTER to complete the setting 2 If want to set the RS 232 Baud Rate to 9600 Set to interface window by pressing MENU and adjust the Baud Rate value to 9600 with the wheel knob and press ENTER to complete the setting For further details please refer to the programmer manual of PST PSS PSH series programmable power supply Remote Error Sensing A normal power supply can perform its best load regulation line regulation low output impedance and low output ripple and noise as well as the rapidly transient recovery response Please refer to figure 5 2 If there is any test lead connected between load and output terminal the best characters of power supply can not be shown up on the load
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