User Manual - Global Specialties
Contents
1. CD 220uF 50V ELE 14 SECTION 5 PART LIST amp SCHEMATICS PCB Components ZSDT CT 05 PCB Ref Designator Value RESISTORS Ri 270E 2W 5 MOR R2 47E MFR 1 4W 5 R3 10K MFR 1 4W R4 1K MFR 1 4W 5 R5 10E MFR 1 4W 5 R6 3 9K MFR 1 4W R7 3 3K 2W 5 MOR R8 10K MFR 1 4W R9 8 2K MFR 1 4W R10 100K MFR 1 4W R11 4 7E MFR 1 4W R12 1 5K MFR 1 4W R13 180K MFR 1 4W R14 390E MFR 1 4W R15 6 8K MFR 1 4W 5 R16 12K MFR 1 4W 5 R17 3 9K MFR 1 4W 5 R18 10K MFR 1 4W R19 10K MFR 1 4W R20 10K MFR 1 4W R21 3 3K 2W 5 MOR R22 270E 2W 5 MOR R23 82K MFR 1 4W 5 R24 4 7K MFR 1 4W 5 R25 24E MFR 1 4W 5 R26 820E MFR 1 4W 5 R27 330K MFR 1 4W 5 R28 39K MFR 1 4W 5 R29 180K MFR 1 4W 5 R30 1K MFR 1 4W 5 R31 15E MFR 1 4W 5 R32 6 8K MFR 1 4W 5 R33 15K MFR 1 4W 5 R34 6 8K MFR 1 4W 5 R35 15K MFR 1 4W 5 R36 1K MFR 1 4W 5 13 OPERATING INSTRUCTIONS TURN ON SETTING PROCEDURE The following procedure describes the use of controls and indicators a h Ensure that the AC power switch is in the OFF position Connect the unit to a specified input voltage Turn the VOLTAGE and CURRENT controls fully counter clockwise Set POWER ON Switch to ON position The front panel digital meters will light up and voltmter and ammeter displays will read zero and observe that CV LED glows Adjust the VOLTAGE controls till2. 5 330K MFR 1 4W 5 100E MFR 1 4W 5 I CAL 3 9K MFR 1 4W 5 I CAL 1K MFR 1 4W 5 1K MFR 1 4W 5 10K MFR 1 4W 5 V CAL 100E MFR 1 4W 5 V CAL 2K MFR 1 4W 5 Shorting Link Shorting Link 10E MFR 1 4W 5 10E MOR 2W 5K PRE LIN V DEV DROP 500E PRE LIN V V CAL 500E PRE LIN V I CAL 0 1uF 100V MP 0 1uF 250VAC MKP 15 000uF 50V ELE 0 1uF 50V MP 10 33uF 50V ELE 100uF 50V ELE 1004uF 50V ELE 1uF 50V ELE 4 7uF 50V ELE 10uF 50V ELE 1004uF 50V ELE 47uF 50V ELE 1kpF 50V CD 1kpF 50V CD 0 1uF 50V CD 10uF 50V ELE 10uF 50V ELE 0 1uF 50V CD 220uF 50V ELE 15 LOCATION AND DESCRIPTION OF OPERATING CONTROLS In order to use the full capabilities of the 1332A it is highly recomended that the user become familiar with the controls associated with this instrument See Figure 1 Figure 1 Location of operating controls 1 Power ON OFF switch 7 Current Fine Control Clockwise rotation increases variable output current in CC mode 2 Supply LED Display 8 CV LED Display Voltage 0 to 32VDC Constant Voltage mode Indication 3 Supply LED Display 9 CC LED Displays current 0 to 5SAMP Constant Current Mode Indication 4 Variable coarse voltage control 10 Output terminals Clockwise rotation increases Red terminal is output ve variable o p voltage in CV mode Black terminal is output ve 5 Variable fine voltage control 11 Ground terminal Clockwise rota
3. accuracy of 3 counts Respective LED lights up when the unit is working in CV or CC mode Single turn coarse and fine voltage and current controls are provided on the front panel 0 40 C 115V 230V AG 10 47 63Hz single phase 230mm x255mm x133mm 9 0Kg nett Approx PCB Components Ref Designator C20 C21 C22 C23 C24 C25 C26 C27 C29 DIODES CR1 CR2 CR3 CR4 CR5 CR6 CR7 CR8 CR9 C10 CR11 CR12 CR13 CR14 CR15 CR16 CR17 CR18 CR19 CR20 CR21 CR22 CR23 CR24 CR25 CR26 CR27 CR28 CR29 CR30 ZSDT CT 05 PCB Value 220uF 50V ELE 47uF 50V ELE 10uF 50V ELE 0 1uF 50V CD 10uF 50V ELE 10uF 50V ELE 0 1uF 50V CD 470uF 50V ELE 1000uF 35V ELE Not Used 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4007 1KV 1A 1N4148 100V 10mA 1N4148 100V 10mA 1N4148 100V 10mA 1N4148 100V 10mA 1N4007 1KV 1A 1N4007 1KV 1A PCB Components Ref Designator R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R59 PRESETS PR101 PR102 PR103 CAPACITORS ZSDT CT 05 PCB Value 2K MFR 1 4W 5 1K MFR 1 4W 5 1K MFR 1 4W 5 4 7K MFR 1 4W
4. 1332A REGULATED DC POWER SUPPLY Instruction Manual GLOBAL SPECIALTIES Global Specialties LLC 22820 Savi Ranch Parkway Yorba linda CA 92887 WWW globalspecialties com M 00149 800 572 1028 EDITION 2 JULY 2001 PCB Components Z TR 01PCB REV 01 Ref Designator Value RESISTORS R1 1K 2W 5 MOR R2 0 1E 2 5W 5 WW R129 33K 0 25W 5 MFR CAPACITORS C1 0 1uF 50V CD C2 100uF 50V EL C3 10uF 50V EL DIODE CR1 1N5402 X 2 PCB Componenis CHASSIS amp FRONT PANELS Ref Designator Value CHASSIS VARISTOR FOR 115V 201K FOR 230V DNR 20D 361 FILTER YUNPEN EMI 6A 125V 250V MAINS TRANSFORMER 650VA INPUT FUSE FOR 115V 5Amp TYPET FOR 230V 2 5Amp TYPE T FRONT PANEL WW POT IKE 1WX2 WW POT 10KE 1W WW POT 50E iW LED GREEN 3mm LED RED 3mm ON OFF SWITCH DPST CHILLY 3022 6A 125V 250V 19 TABLE OF CONTENTS GENERAL INFORMATION eee Page 1 SPECIFICATIONS svanen Page 2 LOCATION AND DESCRIPTION OF OPERATING GONTROLS isactivs totes cecteiise ent Page 4 INSTALLATION Page 5 OPERATING INSTRUCTIONS Page 6 POWER SUPPLY OPERATION scce Page 8 SAFETY INSTRUCTION sesse Page 9 OPERATING PRECAUTIONS Page 10 CASE DISASSEMBLY AND ASSEMBLY Page 11 MAINTENANCE AND RECALIBRATION Page 11 SERVICE AND WARRANTY INFORMATION Page 12 PART EST 2 Page 13 SCHEMATIC AND BOARD LAYOUT Page 20 LIST OF ILLUSTRATIONS FIGURE 1 Location of operating controls Page 4 GENERAL INF
5. IM PIN MALE TP4 RIM PIN MALE TP5 RIM PIN MALE TP6 RIM PIN MALE SPADE CON 12H750 17 SPECIFICATIONS Detailed specifications of the power supply are given in the following table OUTPUT VOLTAGE 0 32V DC continuously variable with coarse and fine voltage controls LOAD CURRENT 0 5 Amp max continuously variable with coarse and fine controls CONSTANT VOLTAGE MODE REGULATION LINE Less than 0 01 2mV for 10 change in line voltage LOAD Less than 0 01 2mV for load change from zero to full load Less than 1mV rms max 20Hz 20MHz RIPPLE amp NOISE CONSTANT CURRENT MODE REGULATION LINE Less than 0 1 250uA for 10 change in line voltage LOAD Less than 0 1 250uA for change in output voltage from 0 volts to max output voltage RIPPLE amp NOISE 0 04 rms 2 0 mA OUTPUT POLARITY OVERLOAD PROTECTION TRANSIENT RESPONSE Floating w r t ground Automatic overload and short circuit protection 100usecs to within 10mV of set output voltage for load change from 10 to 90 STABILITY Total drift within 8 hours after warm up under PANEL METERS MODE INDICATION OUTPUT CONTROLS OPERATING TEMP INPUT VOLTAGE DIMENSIONS WxDxH WEIGHT 0 1 2 5mV in constant voltage mode 0 5 2mA in constant current mode constant line load amp temp Digital panel meters marked V for voltmeter and A for ammeter are provided with an
6. ORMATION DESCRIPTION The 1332A Power Supply is a high perfomance single output DC power supply for industrial and laboratory use Performance with economy have successfully been combined to provide a compact fully solid state instrument The output is continuously variable from 0 to 32V and can supply 5A max and can be adjusted continuously through out the output range The front panel CURRENT control can be used to establish the output current limit overload or short circuit When the supply is used as a constant voltage source the VOLTAGE controls can be used to limit the output voltage When the unit is used as a constant current source CURRENT controls can be used to limit the output current The unit will automatically cross over from constant voltage to current mode and vice versa if the output current or voltage exceeds these preset lim its Output voltage and current are continuously moni tored on two front panel meters The load terminals are provided on the front panel Either the positive or negative output terminal may be grounded or the power supply can be operated floating at upto a maximum of 300VDC above ground All the outputs are floating i e neither the output positive terminal nor the negative terminal nor any point within the regulator circuitry is connected to ground The power supply is designed to operate in ambient temperature of upto 40 C and full output may be drawn continuously provided free ai
7. PMENT To ensure safe ship ment of the power supply unit it is recommended that the package designed for the unit be used The original pack aging material is reusable Be sure to attach a tag to the unit specifying the owner and the fault observed with a brief description REMOVING COVER The top cover is retained in place by 6 self tapping screws amp two handle mounting screws To remove cover proceed as follows a Remove the handle mounting screws b Remove the self tapping screws on sides c Lift the cover from rear side slide backwards amp pull 5 PCB Componenis Ref Designator R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R59 PRESETS PR101 PR102 PR103 CAPACITORS ZSDT CT 05 PCB Value 2K MFR 1 4W 5 1K MFR 1 4W 5 1K MFR 1 4W 5 4 7K MFR 1 4W 5 330K MFR 1 4W 5 100E MFR 1 4W 5 I CAL 3 9K MFR 1 4W 5 I CAL 1K MFR 1 4W 5 1K MFR 1 4W 5 10K MFR 1 4W 5 V CAL 100E MFR 1 4W 5 V CAL 2K MFR 1 4W 5 Shorting Link Shorting Link 10E MFR 1 4W 5 10E MOR 2W 5K PRE LIN V DEV DROP 500E PRE LIN V V CAL 500E PRE LIN V I CAL 0 14F 100V MP 0 1uF 250VAC MKP 15 000uF 50V ELE 0 1uF 50V MP 10 33uF 50V ELE 100uF 50V ELE 100uF 50V ELE 1uF 50V ELE 4 7uF 50V ELE 10uF 50V ELE 100uF 50V ELE 47uF 50V ELE ikpF 50V CD 1kpF 50V CD 0 1uF 50V CD 10uF 50V ELE 10uF 50V ELE 0 1uF 50V
8. e read on the separate digital panel meters continuously OPERATING PRECAUTIONS The power supply is ideally suited for virtually any type of IC bread boarding from TTL CMOS and ECL to op amps audio and video amps phase locked loops and microprocessor circuitry However certain normal bread boarding precautions should be taken to avoid ground loops and inadvertent loading Observance of correct load polarity is also important since most ICs may be damaged by improper power supply connections POLARITY Observe proper polarity when connecting the power supplies to the load especially if the load is polarity sensitive and does not have reverse polarity protection GROUND LOOPS A ground loop is a voltage drop on a ground bus caused by a power stage output entering the ground bus some distance away from the power supply ground binding post This small voltage drop though only milliVolts or micro Volts is a part of the output load If a preamplifier input of circuit ground is connected to a portion of this ground bus feedback and oscillation may occur To prevent this all output stages should be positioned as close as possible to the ground terminal preamps farther away Many audio IC s have seperate input and output grounds to prevent ground loops Eventhough power supplies are tightly regulated a short length of a power bus can present enough inductance to cause linear IC oscillation at high frequencies For this reason effectiv
9. e bypass capacitors are needed to bypass the power buses Place these capacitors as close as possible to the power supply pins of the IC Disc ceramics 0 1uF work well and should be placed across as many ICs as possible Do not use elec trolytic or paper capacitors because they have high inductances and cease to act as bypasses above one or two MHz Bypassing is required with digital IC s also problems such as inability to reset or to clear and false triggering can occur if IC s are not properly bypassed 10
10. k currents which can cause unwanted crossover CONSTANT CURRENT MODE To select a constant current output proceed as follows a Short circuit the output terminals of the power supply b Connect a DC Ammeter OR a shunt digital voltmeter DVM combination across the output terminals ing appropriately guaged wire and hardware The recommended current ratings for the ammeter or the shunt and the wire must be at least 10 more than the output current of the power supply model The ammeter or shunt DVM combination must be rated better than 0 5 accuracy c Turn the VOLTAGE controls clockwise And Turn the CURRENT controls slowly clockwise The CURRENT control range will be from minimum to maximum rated output current Adjust CURRENT controls for desired output current d Compare the ammeter reading with the front panel ammeter reading Or compare the DVM reading with the front panel ammeter reading using V R where V is the DVM reading and R is the DC shunt sistance e Open output terminals and adjust VOLTAGE controls for maximum output as required by the load conditions If a load change causes the voltage limit to be exceeded the power supply will automatically cross over to constant voltage output at the preset voltage limit and output current will drop proportionately In setting voltage limit allowance must be made for high peak voltages which can cause unwanted crossover 8 LOAD CONNECTIONS The load sh
11. n the VOLTAGE controls clockwise And Turn the CURRENT controls slowly clockwise The CURRENT control range will be from minimum to maximum rated output current Adjust CURRENT controls for desired output current Compare the ammeter reading with the front panel ammeter reading Or compare the DVM reading with the front panel ammeter reading using V R where V is the DVM reading and R is the DC shunt resistance Open output terminals and adjust VOLTAGE controls for maximum output as required by the load conditions If aload change causes the voltage limit to be exceeded the power supply will automatically cross over to constant voltage output at the preset voltage limit and output current will drop proportionately In setting voltage limit allowance must be made for high peak voltages which can cause unwanted crossover Turn the VOLTAGE controls clockwise and observe both the front panel voltmeter and the DVM Compare the DVM reading with the front panel voltmeter reading to verify the accuracy of the internal voltmeter The VOLTAGE control range will be from minimum to the maximum rated output voltage Adjust desired voltage by adjusting the voltage controls Short circuit output terminals and adjust CURRENT controls for maximum output current as required by the load COneIOnS SERVICE AND WARRANTY INFORMATION FACTORY SERVICE AND REPAIR Global Specialties will service and repair this instrument free of charge for a period of
12. one full year subject to the warranty conditions stated below To obtain a return merchandise authorisation RMA required for all returns phone our customer service department for a RMA and all shipping instructions GLOBAL SPECIALTIES 70 Fulton Terrace New Haven Connecticut 06512 TEL 203 466 6103 FAX 203 468 0060 Email eblaur aol com ATTN Customer Service Department WARRANTY Global Specialties warrants this device to be free from defective material or workmanship for a period of 3 years from the date of original purchase Global Specialties under this warranty is limited to repairing the defective device when returned to the factory shipping charges prepaid within three full years from the date of original purchase Units returned to Global Specialties that have been subject to abuse misuse damage or accident or have been connected installed or adjusted contrary to the instructions furnished by Global Specialties or that have been repaired by unauthorised persons will not be covered by this warranty Global Specialties reserves the right to discontinue models change specifications price or design of this device at any time without incurring any obligation whatsoever The purchaser agrees to assume all liabilities for any damages and or bodily injury which may result from the use or misuse of this device by the purchaser his employees or agents This warranty is in lieu of all other representations or
13. ould be connected to the power supply output terminals using separate pairs of connecting wires This will minimize mutual coupling effects between loads and will retain full advantage of the low output impedance of the power supply Each pair of connecting wires should be as short as possible and twisted or shielded to reduce noise pick up If a shielded pair is used connect one end of the shield to ground at power supply and leave the other end unconnected Positive or negative voltage can be obtained from this supply by grounding either one of the output terminals or one end of the load Always use two leads to connect load to the supply regardless of where the set up is grounded This will eliminate any possibility of the output current return paths through the power source ground which would damage the line cord plug This supply can also be operated upto 300V DC above ground if neither output terminal is grounded POWER SUPPLY OPERATION INITIAL SET UP Refer to the preceding section for initial set up of the power supply OPERATING INSTRUCTIONS Proper operation of most circuitry depends on correct supply voltages It is recommended that the power supply be set to the required voltage levels with the load disconnected When the desired voltage is set using the variable voltage control turn the AC power OFF connect the load to the power supply then turn the AC power ON Output voltage and current of the power supply may b
14. r circulation is allowed The unit works from mains supply of 115V 230VAC 47 63 Hz with selectable Switch PCB Components Ref Designator RESISTORS Ri PRESETS PR1 CAPACITORS C1 C2 C3 CA C5 C6 C7 C8 c9 C10 IC s IC1 VRI FND s DS1 DS2 DS3 LED s LED1 LED2 MISCILLANEOUS Ji J2 J3 2X Z DPM 01 PCB REV 01 Value 39K 0 25 5 MFR 470K 0 25W 5 MFR 1M 0 25W 5 MFR SEL INPUT 10K 0 25W 5 MFR 2K4 0 25W 5 MFR 330E 0 25W 5 MFR 330E 0 25W 5 MFR 6K8 0 25W 5 MFR 2 5K LIN VER REF ADJ 220pF 50V CD 0 1uF 100V MP 0 01uF 50V CD 0 47uF 100V MP 0 1uF 100V MP 0 1uF 100V MP 10uF 50V EL 0 1uF 50V CD 10UF 50V EL 0 1uF 50V CD 7107 DECODER DRIVER TL 431 TSD566 GREEN TSD566 GREEN TSD566 GREEN 3MM GREEN VOLTAGE FOR CV MODE 3MM RED CURRENT FOR CC MODE 2 54PITCH 3PIN M NOT USED 2 54PITCH 4PIN M 18 PCB Components Ref Designator ZSDT CT 05 PCB Value ZENERS Z1 1N758 10V 0 4W Z2 1N758 10V 0 4W Z3 1N750 4 7V 0 4W BRIDGE BR1 10A 600V PC MTG BRIDGE BR2 CSB 1 100V 1A BRIDGE ICs IC1 4N25 OPTO IC2 7812 IC3 TL431 ICA LM324 IC5 7812 IC6 TL431 IC7 79L05 IC8 7805 TRANSISTORS FET SCR Q1 BC109 Q2 MPSA12 Q3 BC557 Q4 BC557 Q5 BC547 FETI IRFP150 SCR1 2N6396 FET2 IRFP150 CONNECTORS CON2 2 54mm PITCH 12PIN M CON3 2 54mm PITCH 12PIN M L TYPE CON4 2 54mm PITCH 8PIN M MISCELLANEOUS TP1 RIM PIN MALE TP2 RIM PIN MALE TP3 R
15. the desired voltage is indicated on voltmeter To check CONSTANT CURRENT mode turn OFF the supply Short circuit the output terminals of the power supply and turn ON the supply Adjust CURRENT controls until the desired out put current is indicated on ammeter Also check that the CC LED glows Remove the short circuit CONSTANT VOLTAGE MODE To select a constant voltage output proceed as follows a Connect a digital voltmeter DVM across the out put terminals observing correct polarity The DVM must be rated for better than 0 5 accuracy Turn the CURRENT controls clockwise And Slowly If a load change causes the current limit to be exceeded the power supply will automati cally cross over to constant current output at cur rent limit and output voltage will drop proportion ately In setting the current limit allowance must be made for high peak currents which can cause unwanted crossover 6 CONSTANT CURRENT MODE To select a constant current output proceed as follows a b d Short circuit the output terminals of the power supply Connect a DC Ammeter OR a shunt digital voltmeter DVM combination across the output terminals using appropriately guaged wire and hardware The recommended current ratings for the ammeter or he shunt and the wire must be at least 10 more than the output current of the power supply model The ammeter or shunt DVM combination must be rated better than 0 5 accuracy Tur
16. tion increases variable output voltage in CV mode 6 Current coarse Control Clockwise rotation increases variable output current in CC mode INSTALLATION INITIAL INSPECTION As soon as the power supply unit is unpacked inspect for any damage that may have occured during transit Save all packing material until in spection is completed If any damage is found notify the carriers immediately Our authorised representatives should also be notified PHYSICAL CHECK This check should confirm that there are no broken knobs or connectors that the cabinet and panel surfaces are free of dents and scratches and the meters are not scratched and cracked ELECTRICAL CHECK The power supply unit should be checked against electrical specifications An in cabinet performance check will verify proper operation INSTALLATION DATA The power supply unit is shipped ready for bench operation It is necessary only to connect the unit to a rated source of power and it is ready for opera tion LOCATION The power supply unit is naturally cooled Sufficient space should be kept around the unit while in operation so that heat sinks do not remain in confined space or close to another heating source The ambient tem perature of the area around the unit should be less than 40 C INPUT POWER REQUIREMENTS The power supply unit may be operated continuously from input voltage of 115V 230V 47 63Hz power source with selectable Switch REPACKAGING FOR SHI
17. warranties expressed implied and no agent or representitive of Global Specialties is authorised to assume any other obligation in connection with the sale and purchase of this device 12 CASE DISASSEMBLY AND ASSEMBLY WARNING Potentially lethal AC power is present whenever theline cord is plugged into the AC outlet even when the power switch is OFF Always disconnect the power cord when opening the case Avoid touching the fuse post on the inside of the unit Should access to the inside of the unit be required proceed as follows 1 Remove the line cord from the AC outlet before disassembly 2 To disassemble the case remove the screws that secure the cover to the chassis and lift the cover off 3 To reassemble the case place the cover on the chassis line up the screw holes and replace the screws MAINTENANCE AND RECALIBRATION ADJUSTMENTS All circuitry is factory calibrated No user adjustments are required FUSE REPLACEMENT Remove the line cord from the AC outlet before changing fuses Using the screwdriver remove the fuse holder cap Replace the fuse with another of identical type and current rating Replace the fuse holder cap If a load change causes the current limit to be exceeded the power supply will automatically cross over to constant current output at current limit and output voltage will drop proportionately In setting the current limit allowance must be made for high pea
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