1506
Instruction Manual
Isolated Variable AC Line Supply
10/2011
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE NO.
1 INTRODUCTION 1
2 SPECIFICATIONS 2
3 DESCRIPTION 3
4 OPERATING INSTRUCTIONS 5
5 SERVICE & 6
WARRANTY INFORMATION
6 CALIBRATION PROCEDURE 9
7 PART LIST & SCHEMATICS 11
8 CIRCUIT DIAGRAM 15
SECTION - 1
INTRODUCTION
ISOLATED VARIABLE AC LINE SUPPLY : MODEL1506
PCB Components FRONT PANEL
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Reference Designator Part Description
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The 1506 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 1506 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 1506 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.
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 4AMP / 250V S/B
FUSE HOLDERS
FH1 10Amp / 250V R3-11
FH2 10AMP / 250V R3-11
PCB Components CHASSIS
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Reference Designator Part Description
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TRANSFORMERS
T1 1506 Isolation
T2 1506 Current
T3 1506 DPM
T4 1506 0-120V/4Amp Variable
T5 1506 Voltage Sense
1
14
PCB Components 0893 DPM
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Reference Designator Part Description
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SECTION - 2
SPECIFICATIONS
INPUT VOLTAGE : 230V AC
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 )
INPUT FREQUENCY : 47 to 63 Hz.
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 (W x H x D ) : 11.73" x 5.23" x 10.62"
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 )
13
WEIGHT : 35 lb. approx.
2
SECTION - 3
DESCRIPTION
INPUT AND OUTPUT TERMINATION :
The unit works from 230VAC, 47-63 Hz single phase supply with
internal tap selection facility for 115V AC operation. 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 230V /50Hz 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 4 Amps 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.
PCB Components GLOBAL 1505 / 06 SW - 0396
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Reference Designator Part Description
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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
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Reference Designator Part Description
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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
3
12
SECTION - 7
PART LIST
PCB Components GLOBAL 1505 / 06 SW - 0396
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Reference Designator Part Description
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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
CIRCUIT DESCRIPTION :
The circuit uses a step down tranformer to provide step down
supply to a single phase variable autotransformer 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.
PRESETS
PR1 100E Horizontal
PR2 100E Horizontal
PR3 100E Horizontal
PR4 10K Horizontal
DIODES
CR1 1N4007
CR2 1N4148
CR1 1N4148
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4
SECTION - 4
OPERATING INSTRUCTIONS
a) 1506 as Isolated Variable AC Supply.
LEAKAGE CURRENT CALIBRATION
9) Set output voltage to zero volt s by turning the Voltage
knob to minimum position.
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) 1506 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.
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 PR1on switch pcb so that DPM
reading is 5.00mA
5
10
SECTION - 6
SECTION - 5
CALIBRATION PROCEDURE FOR MODEL 1506
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
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.globalspecialities.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.
9
6
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.
Copyright 1994, INTERPLEX ELECTRONICS, INC,
Unit No.2, Highland Industrial Centre 1486, Highland Avenue,
Cheshire CT 06410, U.S.A.
and TM trademarks are the property of INTERPLEX
ELECTRONICS, INC, Unit No.2, Highland Industrial Centre
1486, Highland Avenue, Cheshire CT 06410, U.S.A.
CASE DISASSEMBLY AND ASSEMBLY
WARNING
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.
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.
7
8
SERVICE AND WARRANTY INFORMATION
For up-to-date product information, please visit www.globalspecialties.com.
For instructions on how to obtain a return merchandise authorization number (RMA),
please visit our website, or call our customer service department.
GLOBAL SPECIALTIES
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
800-572-1028
globalspecialties.com
Global Specialties will service and repair this instrument free of charge for a period of 3
full years, subject to the warranty conditions below.
WARRANTY
Global Specialties warrants the PB-503 to be free from defective material or
workmanship for a period of 3 full years from date of original purchase. Under this
warranty, Global Specialties is limited to repairing the defective device when returned to
the factory, shipping charges prepaid, within 3 full years from 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 unauthorized 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 notice and 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.
All rights reserved. No Part of this book shall be reproduced, stored in a retrieval
system, or transmitted by any means, electronic, mechanical, photocopying recording,
or otherwise, without written permission from the publisher. No patent liability is
assumed with respect to the use of the information contained herein. While every
precaution has been taken in the preparation of this book, the publisher assumes no
responsibility for errors or omissions. Neither is any liability assumed for damages
resulting from the use of the information contained herein.
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