332A REGULATED DC POWER SUPPLY Instruction Manual GL OB AL SPECIAL TIES GLOB OBAL SPECIALTIES M-00149 EDITION : 2- JULY, 2001 Global Specialties,LLC 22820 Savi Ranch Parkway Yorba linda,CA 92887 WWW.globalspecialties.
PCB Components Z-TR/01 PCB 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 C2 C3 0.
GENERAL INFORMATION 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 throughout the output range. The front panel CURRENT control can be used to establish the output current limit (overload or short circuit).
PCB Components ZSDT-CT/05 PCB ======================================================================= Ref Designator Value ======================================================================= ZENERS Z1 1N758, 10V, 0.4W Z2 1N758, 10V, 0.4W Z3 1N750, 4.7V, 0.4W BRIDGE BR1 BR2 10A/600V PC MTG BRIDGE CSB-1, 100V/1A BRIDGE. ICs IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 4N25 OPTO 7812 TL431 LM324 7812 TL431 79L05 7805 Detailed specifications of the power supply are given in the following table.
STABILITY Total drift within 8 hours, after warm up under : ±0.1% +2.5mV in constant voltage mode. : ±0.5% +2mA in constant current mode. constant line,load & temp. PANEL METERS : Digital panel meters (marked V for voltmeter and A for ammeter) are provided with an accuracy of ± 3 counts. MODE INDICATION : Respective LED lights up when the unit is working in CV or CC mode. OUTPUT CONTROLS : Single turn coarse and fine voltage and current controls are provided on the front panel OPERATING TEMP.
PCB Components ZSDT-CT/05 PCB ======================================================================= Ref Designator Value ======================================================================== R37 2K, MFR, 1/4W, 5% R38 1K, MFR, 1/4W, 5% R39 1K, MFR, 1/4W, 5% R40 4.7K, MFR, 1/4W, 5% R41 330K, MFR, 1/4W, 5% R42 100E, MFR, 1/4W, 5% (I CAL) R43* 3.
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 inspection 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.
SECTION 5 PART LIST & SCHEMATICS PCB Components ZSDT-CT/05 PCB ======================================================================= Ref Designator Value ======================================================================== RESISTORS R1 R2 R3 R4* R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23# R24 R25 R26 R27# R28# R29# R30 R31 R32 R33 R34 R35 R36 270E, 2W, 5%, MOR 47E, MFR, 1/4W, 5% 10K, MFR, 1/4W 1K, MFR, 1/4W, 5% 10E, MFR, 1/4W, 5% 3.9K, MFR, 1/4W 3.
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, 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.
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.
LOAD CONNECTIONS : OPERATING PRECAUTIONS The load should 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.
