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1505!
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Isolated Variable AC Line Supply
Instruction Manual
1505 ISOLATED VARIABLE
AC LINE SUPPLY
Instruction
Manual
M-00116 EDITION : 2 ( FEB., 2002 )
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Global Specialties,LLC
22820 Savi Ranch Parkway
Yorba linda,CA 92887
WWW.globalspecialties.com
800-572-1028
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE NO.
1 INTRODUCTION 1
2 SPECIFICATIONS 2
3 DESCRIPTION 3
4 OPERATING INSTRUCTIONS 4
5 SERVICE & 5
WARRANTY INFORMATION
6 CALIBRATION PROCEDURE 7
7 PART LIST & SCHEMATICS 8
8 CIRCUIT DIAGRAM 12
PCB Components FRONT PANEL
=======================================================================
Reference Designator Part Description
========================================================================
OUTPUT SOCKETS
SOCKET 1 European ( 230VAC )
SOCKET 2 American ( 115VAC )
SOCKET 3 SLBR4 ( Lekage Red )
SWITCHES
SW1 ON/OFF SPDT 1801 10A/230V
SW2 DPDT Toggle 6A/250V
FUSE
F1 6Amp / 250V S/B
F2 5AMP / 250V S/B
FUSE HOLDERS
FH1 10Amp / 250V R3-11
FH2 10AMP / 250V R3-11
PCB Components CHASSIS
=======================================================================
Reference Designator Part Description
========================================================================
TRANSFORMERS
T1 1506 Isolation
T2 1506 Current
T3 1506 DPM
T4 1506 0-120V/4Amp Variable
T5 1506 Voltage Sense
11
SECTION - 1
INTRODUCTION
ISOLATED VARIABLE AC LINE SUPPLY : MODEL1505
The 1505 Isolated Variable AC Source cum leakage current tester
is designed for modern electronics laboratories needing a clean,
electrostatically and galvanically isolated variable line supply.
The unit is designed to provide isolated output variable from 0 to 130
V AC at 4 Amps max and 0 to 260VAC at 2A max on two seperate
output sockets through a range selector switch.The output voltage
and load current can be monitored on a 3 digit DPM. The variable
isolated output voltage capability makes this unit very convenient
to use for either incoming or outgoing quality control testing. It is
also useful for servicing or circuit design work, when checking
operation at voltage higher or lower than normal. The unit consists
of a super isolation transformer which is triple shielded from the line
to protect against shock hazards.
The 1505 can measure power line leakage current by means of a
probe and a switch selected range of the output DPM. It can
measure leakage currents upto 9.99 mA. The unit is overload
protected by means of an input /output fuse.
INITIAL INSPECTION
Before shipping, the 1505 power supply has been tested thoroughly
and found free of mechanical and electrical defects. As soon as it
is unpacked, inspect for any damage that may have occurred during
transit. Particular attention should be paid to the meters. Also
check the packing material for any signs of severe stress (may
be indicative of internal damage). Save all the packing material.
Read the INSTRUCTION MANUAL carefully prior to operation.
1
PCB Components 0893 DPM
=======================================================================
Reference Designator Part Description
========================================================================
CAPACITORS
C1 220pf 100V ±20% CD
C2 0.1µf 100V ±10% MP
C3 0.01µf 100V ±20% CD
C4 0.47µf, 100V ±20% CD
C5 0.1µf, 50V ±10% MP
C6 10µf, 35V ±20% EL
C7 0.1µf, 50V ±10% MP
C8 0.1µf, 50V ±20% CD
C9 Not used
C10 470µf, 35V ±20% EL
C11 2.2µf, 50V ±20% EL
* C12 47µf 50V, ±20% EL ( Additional )
* C13 0.1µf 50V, ±20% CD ( Additional )
DIODES
D1 1N4148
D2 1N4148
D3 TO D6 1N4007
TRANSISTORS/FET’S
Q1 TL431
Q2 MPSA12
Q3 LM7805
IC
IC1 ICL 7107 CPL
FND’S
DS1 TSD566 ( Green )
DS2 TSD566 ( Green )
DS3 TSD566 ( Green )
LED’S
LED1 3mm GREEN Defused
LED2 3mm GREEN Defused
CONNECTORS
CON1 3 PIN 2.54 PITCH ( Male / Female )
CON2 ( L' Type ) 7 PIN 2.54 PITCH ( Male / Female )
10
SECTION - 2
SPECIFICATIONS
INPUT VOLTAGE : 115 VAC
INPUT FREQUENCY : 47Hz to 63Hz.
OUTPUT : I : 0 to 130 VAC at 4AMP MAX.
(Available on American socket only.)
II : 0 to 260 VAC at 2AMP MAX.
(Available on European socket only.)
METERING : 3 digit DPM to read
1) Output Voltage.
2) Load Current and
3) Leakage current upto 9.99 mA.
METER ACCURACY : ± 3 counts.
OUTPUT-LINE ISOLATION : Capacitive coupling less than 0.0005 pF
NOISE REJECTION : Better than 120 db
(common mode noise).
DIMENSIONS : 11.73"(W) x 5.23"(H) x 10.62"(D)
WEIGHT : 35 lb. approx.
2
PCB Components GLOBAL 1505 / 06 SW - 0396
=======================================================================
Reference Designator Part Description
=======================================================================
IC’S
IC1 7660 S
IC2 KA 741/ LM 741
PUSH SWITCHES
SW1 TO SW3 4 Pole, 2 Way ( Interlock )
RELAY
RL1 2/P 2CO 6V/6A ( OEN 58-06-2C )
CONNECTORS
CON1 5 PIN 2.54 PITCH ( MALE / FEMALE )
CON2 7 PIN 2.54 PITCH ( MALE / FEMALE )
PCB Components 0893 DPM
=======================================================================
Reference Designator Part Description
=======================================================================
RESISTORS
R1 39K, ¼W, ±5%, MFR
R2 470K, ¼W, ±5%, MFR
R3 1ME, ¼W, ±5%, MFR
R4 SEL , ¼W, ±5%, MFR
R5 2.4K, ¼W, ±5%, MFR
R6 2.7K, ¼W, ±5%, MFR
R7 30K, ¼W, ±5%, MFR
R8 8.2K, ¼W, ±5%, MFR
R9 100E, ¼W, ±5%, MFR
R10 12K, ¼W, ±5%, MFR
R11 20K, ¼W, ±5%, MFR
R12 100E, ¼W, ±5%, MFR
R13 330E, ¼W, ±5%, MFR
R14 Not in Use
PRESETS
PR1 2.2K Horizontal
9
SECTION - 3
DESCRIPTION
INPUT AND OUTPUT TERMINATION :
The unit works from 115VAC, 47Hz to 63Hz single phase supply
with internal tap selection facility. The input is provided through a
mains cable with a plug. The use of a three core cable enables the
cabinet of the unit to be properly grounded.
The unit as shipped from factory is wired for 115V AC single phase
supply
Output is provided on two seperate sockets through a output voltage
range selector switch. In one position, it provides 0 -130 VAC at 4A
max whereas in other position,it provides 0-260VAC at 2Amp.max.
METERING :
One 3-digit DPM is provided to measure
1) Output voltage
2) Leakage current
3) Load current
Meter function is switch selectable
ON-OFF SWITCH AND FUSE :
The power ON-OFF switch is located on the front panel. The fuses
(Input & Output) are also located on the front panel. The fuse ratings
are clearly marked.
PANEL CONTROLS :
A voltage adjust knob allows adjustment of output AC voltage and
the output voltage selector switch selects the output AC voltage
range so as to provide 0 -130VAC isolated output only on American
socket while 0 - 260VAC isolated output only on European socket.
Three meter function push switches are provided to select the
Leakage Current or Output Voltage or Output Current (mA,V & A
respectively.) to be displayed on the meter.
CIRCUIT DESCRIPTION :
The circuit uses a step down tranformer to provide step down supply
to a single phase variable autotrans former to obtain an output
voltage variable from 0 to 130VAC. This is followed by a triple
shielded isolation transformer which provides an output voltage from
0-130VAC or 0-260VAC electrostatic and galvanic isolation.
Multiple shielding technique reduces primary to secondary static
coupling to below 0.0005pF. The DC isolation is over 1000 M Ohms.
3
SECTION - 7
PART LIST
PCB Components GLOBAL 1505 / 06 SW - 0396
=======================================================================
Reference Designator Part Description
=======================================================================
RESISTORS
R1 1.5K, ¼W ±5% MFR
R2 120E, ¼W ±5% MFR
R3 10K, ¼W ±5% MFR
R4 62K, ¼W ±5% MFR
R5 10 ohm, ¼W ±5% MFR
R6 220 ohm, ¼W ±5% MFR
R7 Not Used
R8 10K, ¼W ±5% MFR
R9 100K, ¼W ±5% MFR
R10 10M, ¼W ±5% MFR
R11 4.7K, ¼W ±5% MFR
R12 10K, ¼W ±5% MFR
R13 1.2M, ¼W ±5% MFR
R15 470K, ¼W ±5% MFR
CAPACITORS
C1 1µf, 50V ±20%, ELEC
C2 1µf, 50V ±20%, ELEC
C3 220µf, 16V ±20%, ELEC
C4 220µf, 50V ±20%, ELEC
C5 0.1µf, 100V ±10%, MP
C6 0.22µf, 100V ±10%, MP
PRESETS
PR1 100E Horizontal
PR2 100E Horizontal
PR3 100E Horizontal
PR4 10K Horizontal
DIODES
CR1 1N4007
CR2 1N4148
CR1 1N4148
8
SECTION - 4
OPERATING INSTRUCTIONS
a) 1505 as Isolated Variable AC Supply.
Set output voltage to ‘0’ volt by turning the 'Set Voltage' knob to
minimum position. Press push button switch marked 'V'
Keep the output voltage selector switch to the desired range
(0 -130V or 0 -260V). Isolated variable voltage will be available at the
respective output socket only.
Switch "POWER"ON. Adjust the voltage control knob till the
desired voltage is indicated on the 3-digit DPM.Connect the load
at the output. Press push switch marked 'A'.The DPM will now read
the load current. The total load current should not exceed the
maximum rating indicated for each range.
b) 1505 as Line Leakage Tester.
Set output voltage to ‘0’ volt by turning the knob to minimum
position. Press push switch marked ‘V’. switch "POWER" ON.
Adjust the voltage control till the desired voltage at which leakage
current is to be measured is available at the output socket.
Now press push switch marked ‘mA’. Connect unit under test (U.
U. T) to output socket. Connect the leakage test probe at the socket
marked 'Leakage Test'. Connect the other end of the leakage test
probe to the chassis of the unit under test. Depending on the
leakage,the DPM will read the leakage current.
4
SECTION - 6
CALIBRATION PROCEDURE FOR MODEL 1505
1) Keep the Voltage knob to minimum position(ccw). Press push
switch marked ' V '
2) Switch on the power.
3) Set reference voltage of DPM(pin no. 36 of U1-7107) to 1.00Volt by
adjusting the preset VR1 on DPM pcb.
4) Set voltage at pin no. 6 of IC3 (CA3160) to zero Volts with the help
of preset PR4 on switch pcb.
VOLTAGE CALIBRATION
5) Set desired output voltage by turning Voltage knob in clockwise
direction.Connect external AC voltmeter at the output.
6) Adjust preset PR2 on switch pcb so that DPM reading matches
with external AC Voltmeter.
CURRENT CALIBRATION
7) Press push switch marked ' A ' . Connect load at the output with
AC current meter in series with the load.The DPM will now read
the load current.(The load current should not exceed 2 Amps/
4Amps for Range A/B respectively.)
8) Adjust preset PR3 on switch pcb so that the DPM reading matches
with external AC current meter
LEAKAGE CURRENT CALIBRATION
9) Set output voltage to zero volt s by turning the Voltage knob to
minimum position.
10) Press push switch marked ' V '
11) Switch on the power.Adjust output voltage to 130VAC.
12) Press push switch marked ' mA '. now DPM will read leakage
current.
13) Connect 25 Kohm (aprox.1W) resistor across banana socket,
marked 'LEAKAGE TEST', & live point of output socket. Adjust
preset PR1 on switch pcb so that DPM reading is 5.00mA
7
SECTION - 5
SERVICE AND WARRANTY INFORMATION
FACTORY SERVICE AND REPAIR
Global Specialties will service and repair this instrument free of charge for
a period of 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
22820 Savi Ranch Parkway,
Yorba linda, CA 92887
WWW.globalspecialties.com
800-572-1028
WARRANTY
Global Specialties warrants this device to be free from defective material
or workmanship for a period of one full year 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 one
full year from the date of original purchase. Units returned to Global
Specialities that have been subject to abuse, misuse damage or accident,
or have been connected, installed or adjusted contrary to the instructions
furnished by Global Specialities, or that have been repaired by unauthorized
persons will not be covered by this warranty.
Global Specialities 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 warranties expressed
or implied and no agent or representative of Global Specialties is
authorized to assume any other obligation in connection with the sale and
purchase of this device.
Specifications subject to change without notice.
5
!!Copyright 1994, INTERPLEX ELECTRONICS, INC,
Unit N o. 2, Hi ghland Indu st rial Centre 1486 , H ighl an d Ave nue,
Cheshire CT 06410, U.S.A.
!!and TM trademarks are the property of INTERPLEX
ELECTRONI CS, INC, Un it No.2, Hig hland Ind us trial Cen tre
14 86 , H ig hl an d A ve nu e, Ch es hi re CT 06 41 0, U. S. A.
CASE DISASSEMBLY AND ASSEMBLY
WARNING
Potentially lethal AC power is present whenever the line 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 a 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 circutry is factory-calibrated. No user adjustments are required.
FUSE REPLACEMENT
Remove the line cord from the AC outlet before changing fuses. Using a
screwdriver, remove the fuse holder cap. Replace the fuse with another
fuse of identical type and current rating. Replace the fuse holder cap.
6
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