Global Specialties 1504 User Manual

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Isolated!Variable!AC!Line!Supply!

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1504

Instruction!Manual!

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Revision:!11/2010

TABLE OF CONTENTS

INTRODUCTION PAGE 1

INITIAL INSPECTION PAGE 2

SPECIFICATIONS PAGE 3

DESCRIPTION PAGE 4

OPERATING INSTRUCTIONS PAGE 5

PART LIST & SCHEMATICS PAGE 6

CIRCUIT DIAGRAM PAGE

SERVICE & WARRANTY PAGE

INTRODUCTION

ISOLATED VARIABLE AC LINE SUPPLY : M O D E L 1 5 0 4

The 1504 Isolated Variable AC Source cum leakage current tester is designed
for modern electronics laboratories which need a clean, electrostatically and
galvanically isolated variable line supply.

The unit is designed to provide isolated output variable from 0 to 150 V AC/4
Amps Max. 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 in servicing or circuit design work application, 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 1504 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 fuse.

INITIAL INSPECTION

Before shipping, the 1504 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 for any unusual input
requirements and if found so, arrange to comply with the same.

SPECIFICATIONS

OUTPUT VOLTAGE : 0 to 150 VAC

INPUT VOLTAGE : 115 VAC ±10%

INPUT FREQUENCY : 47 to 63 Hz.

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.

LINE & OUTPUT LEAKAGE : Less than 10 mA.

NOISE REJECTION : Better than 120 db (common

mode noise).

DIMENSIONS : 298 mm(W) x 133 mm(H) x 270 mm(D)

WEIGHT : 16 kgs.

DESCRIPTION

INPUT AND OUTPUT TERMINATION :

The unit works from 115 V AC/47-63 Hz single phase supply. The input is
provided through a mains cable with a three pin plug. The use of a three core
cable enables the cabinet of the unit to be properly grounded.

Output is provided on a three-pin socket and is clearly marked 0-150 V AC/4
Amps max.

METERING :
One 3-digit DPM is provided to measure

1) Output voltage

2) Leakage current and

3) Load current
Meter function is switch selectable

ON-OFF SWITCH AND FUSE :
The power ON-OFF switch is provided on the front panel. Fuse is also provided
on the front panel. Fuse rating is clearly marked.

PANEL CONTROLS :
A voltage adjust knob allows adjustment of output AC voltage from 0 to 150 V
AC. Three meter function push switches are provided to select the quantity to
be displayed on the meter.

CIRCUIT DESCRIPTION :
The circuit uses a single phase variable autotransformer to obtain an output
voltage variable from zero to 150 V AC max. This is followed by a triple shielded
isolation transformer which provides electrostatic and galvanic isolation.

Multiple shielding technique reduces primary to secondary static coupling to
below 0.005pF. The DC isolation is over 1000 M Ohms. Line leakage current

to load is 10mA or less.