Global Specialties 1505 User Manual
Page 4
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.
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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 )
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