Leader LPS-151 User manual

$15
LPS-151/152
dc tracking power supply
instruction manual
LEADER
FOR PROFESSIONALS WHO KNOW
THE DIFFERENCE

LPS-151/152
DC TRACKING POWER SLIEPLY
TABLE OF CONTENTS
LDESCRIPTION
2.
FEATURES ..
3. SPECIFICATIONS .1
4. CONTROLS AND CONNECTORS 2
5* OPERATING PRECAUTIONS .,4
5.1 Input Power ,4
5.2 Output Terminals 4
5.3 General 4
5.4 Environmental Considerations 4
6, POWER SUPPLY OPERATION 4
6.1 4- 6VRange Source 4
6.1.1 Operation at aConstant Voltage —4
6.1.2 Operation Using Current Limiting 4
6.2 ±25VRange Sources 4
6.2.1 Fixed Tracking Mode, Constant Voltage Operation *4
6.2.2 Variable Tracking Ratio Mode, Constant Voltage Operation 5
6.2.3 Operation Using Current Limiting 5
6.2.4 Voltage Settings Above 25V, Constant Voltage Operation 5
6.2.5 Voltage Settings Above 25V, with Current Limiting 5
7, CALIBRATION PROCEDURES .. ,5
7.1 Preparation 5
7.2Adjustment of Meter Zero with Power On 6
7.3Adjustment of the VoItmeter with Pow'er On 6
7.4 Ammeter Adjustments 6
7.5 Connections for Other AC Line Voltages 7
8, PARTS LISTS ...... 8
8J LPS-151 Parts List 8
8.2
LPS-152 Pirns List iO
9, BLOCK DIAGRAMS, PC BOARDS, AND SCHEMATICS .12

Figure 1-1* DC Tracking Power Supply
1.
DESCRIPTION
The LPS- 15 1/152 DC Tracking Power Supplies each pro-
vide three regulated voltage sources, covering the 0to 6V, 0
to 25V and 0to -25V ranges. The +25V and -25V range
sources can also be used in avoltage tracking mode. These
power supplies are equipped with abuilt-in voltmeter and
ammeter so that the output conditions for each section of the
supply can be monitored individually.
2.
FEATURES
1. The +25V and —25V sources can be used in avoltage
ratio tracking mode.
2. Asource of 50V may be obtained by connecting the load
across the +25V and -25V terminals.
3. Voltage and current settings are made via front panel con-
trols and can be monitored on the built-in voltmeter and
ammeter.
3.
SPECIFICATIONS
Voltage and Current Ranges
Model Output Voltage
Range Output Current
Range
0to 6Vdc Oto 3A
LPS-151 0to25Vdc 0to0.5A
0to-25Vdc Oto 0.5A
0to 6Vdc 0to5A
LPS- 152 0to25Vdc OtolA
Oto-25Vdc OtolA
Tracking Voltage: In the ratio tracking mode, the
—25V source tracks the +25V
source by an adjustable ratio of
50 to 100%
Voltmeter: 0to 7volts and 0to 30 volts on a
dual scale. The meter range and
polarity are determined by pres-
sing the appropriate METER
switch.
Voltmeter Accuracy: 5% of the full scale reading
.
Ripple:
Line Regulation
(output stability):
Load Regulation:
Less than 3mVp.p
Less than 3mVplus 0.01% of the
input change for a10% change of
line voltage.
Less than 3mV plus0.0i%of the
load value from no load to full
load.
Ammeter: LPS-15 1:0to 0.6 amperes and 0
to 3.5 amperes on adual scale.
LPS452: 0to 1.2 amperes and 0
to 6amperes on adual scale.
The meter range and polarity are
determined by pressing the ap-
propriate METER switch.
1

Ammeter Accuracy:
Insulation Voltage;
Circuit Protection:
5%of the full scale reading.
1500 Vac applied for one minute
between one of the ac input ter-
minals and the case of the power
supply.
Overload protection circuit with
automatic resetting by sensing a
constant current.
Power Consumption;
Heat Sink
Temperature Range:
LPS-151: approx. 120VA
LPS-i52; approx. 220V
A
At room temperature (23 to 25°C)
85°C (185°F) with 100% load.
Operating Temperature
Range
Operating Humidity
Range
Storage Temperature
Range
Size {W XHXD)
Weight:
Supplied Accessories:
0^ to 35°C (32" to 95°F)
30 to 85% (non-condensing)
-20 to -H70"C(-4to 158°F)
LPS-151: 8V2 X5^4 X 13 in.
215 X132 X332 mm.
LPS-152: 8»/2x5V4 x14'/k in.
215X132 X360 mm.
LPS-151: 13y2!bs.;6.1 kg
LPS-152: l5V4lbs.;7,5kg
Instruction Manual
4. CONTROLS AND CONNECTORS
Figure 4-1. Front Panel
Front Panel, Refer to Figure 4-1
.
POWER Switch Press to turn on power. Press
again to release button and turn
off power.
Pilot lamp
METER selector
switches
©
©
@REFERENCE/±25V
Control
Lights when power is on.
These switches assign the volt-
meter and ammeter to one of the
ranges. (3) is for the +25V source.
(4) is for the —25V source, and
(5) is for the +6V source.
This provides output voltage
level setting for the +25V and
-25V range sources.
QTRACKING RATIO
Selector Switch
In the FIXED position, the REF-
ERENCE/±25V control (6) sets
both 25V sources to the same
magnitude but opposite polarity.
In the VARIABLE position, ratio
tracking of the -25V source
using the +25V source as arefer-
ence is possible.
Case ground
terminal
This terminal is connected di-
rectly to the case
(9)TRACKING RATIO
Control
This control determines the track-
ing ratio for the —25V source.
When the TRACKING RATIO
selector switch is in FIXED, this
control is disabled.
2

COM terminal This is the common point for the ©VOLTAGE +6V
+25V and -25V sources. This
terminal is internally connected control
to COM terminal (16) for the 6V ®Voltmeter
source.
i-25V Source
output terminal ©Voltmeter
©CURRENT This sets the output current limit Zero adjust
control for the +25V source. It is adjust- 0Handle
LPS-151: +0.5A able from OA to the full load cur-
EPS- 152: -HA rent rating. ©Ammeter
Zero adjust
—25V Source
Kiy output terminal @Ammeter
©CURRENT This sets the output current limit
control for the -25V source. It is adjust-
LPS-151:-0.5A able from OA to the full load cur-
LPS-152:-1A rent rating. Rear Panel, Refer
©6V Source
output terminal 0AC Cord
©COM terminal Common terminal for the 6V
source. This terminal is internally
connected to COM terminal (10)
for the +25Vand —25Vsources.
0Fuse
©CURRENT This sets the output current limit
control for the 6V source It is adjust- 0Heat sink
LPS^151: 3A able from OA to the full load cur-
EPS- 152: 5
A
rent rating.
This sets the output voltage for
the -h 6V source.
Gives voltage indication in the
+25V and +6V ranges, selected
by one of the METER (3), (4), and
(5) buttons.
Gives current indication in the
±25V and +6V ranges, selected
by one of the METER mode (3),
(4), and (5) buttons.
to Figure 4-2.
Power cord, 3-wire grounded
EPS- 151:
120V operation, 2Aslow blow
240V operation, lA slow blow
EPS- 152:
120V operation, 3Aslow blow
240V operation, L5A slow blow
Dissipates heat to ensure proper
power supply operation.
Figure 4-2* Rear Panel
3