Lodestar LS1130 User manual
INSTRUCTION MANUAL
Model LS1130
Single Output DC Power Supply
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GENERAL SAFETY SUMMARY
Review the following safety precautions to avoid injury and prevent damage to this
product and any product connected to it. To avoid potential hazards, use this product
only as specified.
To avoid fire or personal injury:
Use proper power cord. Use only the power cord supplied with this product or a
power cord that is specified for the country of use.
Ground the product: When using the supplied three prong power cord, this product is
grounded through the grounding connector of the power cord. To avoid electrical
shock, the grounding connector must be connected to earth ground. Before making
connections to the input or output of the terminals of the product, ensure the product
is properly grounded.
Observe all terminal ratings: To avoid fire or shock hazard, observe all ratings and
markings on the product. Consult the product manual for further ratings information
before making connections to the product.
Avoid exposed circuitry. Do not touch exposed connections and components when
power is present.
Do not operate without covers. Do not operate this product with covers and panels
removed.
Do not operate in an explosive atmosphere
Do not operate in wet or damp conditions.
Use an insulated floor material or a large, insulated floor mat to stand on and an
insulated work surface on which to place equipment.
Don’t expose high voltage needlessly. Remove housings and covers only when
necessary. Turn off equipment while making test connections in high-voltage
circuits. Discharge high-voltage capacitors after removing power.
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Table of Content
1. Product Introduction......................................................................5
1.1 Description.......................................................................................... 5
1.2 Key Features ....................................................................................... 5
2. Specifications...................................................................................6
3. Safety Information and Installation..............................................7
3.1 Unpacking the instrument ................................................................... 7
3.2 Checking the Line Voltage.................................................................. 7
3.2 Cooling................................................................................................ 7
4. Panel Introduction..........................................................................8
4.1 Front Panel.......................................................................................... 8
4.2 Rear Panel ........................................................................................... 10
5. Operating Instructions ...................................................................11
5.1 General Precautions ............................................................................ 11
5.2 Getting Started, Hook-up .................................................................... 11
5.3 Typical Constant Voltage Operation................................................... 11
5.4 Typical Constant Current Operation ................................................... 12
5.5 Connecting two Power Supplies in Series........................................... 13
5.6 Connecting two Power Supplies in Parallel ........................................ 13
6. Maintenance ....................................................................................16
6.1 Fuse replacement................................................................................. 16
6.2 Line Voltage selection......................................................................... 16
7 Service Information.........................................................................17
7.1 Warranty and Non-Warranty Service.................................................. 17
7.2 Limited 90 day Warranty .................................................................... 17
8. Appendix .........................................................................................18
8.1 CE Declaration.................................................................................... 18
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SAFETY TERMS AND SYMBOLS
These terms and symbols may appear on the product or in the user manual.
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WARNING: Warning statements identify condition or
practices that could result in injury or loss of life.
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CAUTION: Caution statements identify conditions or
practices that could result in damage to this product or other
property.
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Protective Ground
(Earth) Terminal
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1 PRODUCT INTRODUCTION
1.1 Description
The Lodestar Electronics model LS1130 is a high quality, general purpose Single
Output Regulated DC Power Supply. It provides 0-30 Volts DC output, adjustable
with both coarse and fine voltage controls for precise setting of the desired value. The
current output is rated 0-3 Amps, adjustable with both coarse and fine current
controls. Two large LED meters continuously monitor the output voltage and current.
This instrument may be used in constant voltage or constant current applications. The
crossover from constant voltage to constant current modes is smooth and automatic.
LED’s indicate the “CV” (constant voltage) or “CC” (constant current) mode of
operation. In constant voltage applications, a current limit may be preset. When load
variations cause the current to reach the preset limit, the unit then regulates output
current rather than output voltage.
The output is isolated from chassis and earth ground, which permits full flexibility of
connections. When needed, the (+) or (-) polarity may be strapped to ground, or either
polarity may be floated to an external voltage. Two supplies may be connected in
series as a 0-to-60 volt power source, or two supplies may be connected in parallel,
with suitable balancing resistors, for up to twice the output current. Reverse polarity
protection prevents accidental damage to the power supply from improper
connection to an external voltage.
This power supply is well suited for a wide variety of electrical and electronics
applications, including s school laboratories, and home use by hobbyists, service
shops, engineering labs and production testing,
1.1 Key Features
Fully featured adjustable DC power supply
Coarse and Fine Controls for Voltage and Current
Two large panel mounted LED meter displays to monitor output current (red)
and output voltage(green)
Overload and reverse polarity protection
Isolated Output. Either polarity may be floated or grounded.
CV/CC operation. LED indication for CV (Green)/ CC (Red) mode.
Excellent regulation and low ripple characteristics.
Light and compact design
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2. SPECIFICATIONS
Output Voltage 0 – 30V, Coarse and Fine adjustment
Output Current 0 – 3A, Coarse and Fine Adjustment
Line Regulation ≤0.01% + 3mV
Load
Regulation ≤0.01% + 3mV (≤rating current)
Ripple & Noise ≤1mVrms, 5Hz to 1MHz (rating current ≤
3A)
Temperature
Coefficient ≤300 ppm/°C
Constant Voltage
Mode
Recovery Time <100µS (50% load change, minimum
load 0.5A)
Line
Regulation ≤0.2% + 3mA
Load
Regulation ≤0.2% + 3mA
Constant
Current Mode
Ripple &
Noise ≤0.3mA RMS
3 digit 0.56” LED display
Red LEDs for Voltage, Green LEDs for Current
Display
Accuracy ≤0.5% of reading + 2 digits
General:
Power
Requirements
AC 110V/220V ±10% selectable, 50/60Hz, 210W
Operating
Environment
Operation: 0° to +40° C, 75% R.H.
Storage: -15° to +70° C, 85% R.H
Accessories
included
AC Line Cord
Instruction manual
Fuse
1 set of test leads
1 Earth Ground bus strap
Dimensions
(W x H x D):
127 x 152 x 292 mm
(5 x 6 x11.5”)
Weight: 4Kg (8.8 lbs.)
Specifications and information provided are subject to change without notice.
Please visit www.lodestarelectronics.com for the most current product information.
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3. SAFETY INFORMATION AND INSTALLATION
3.1 Unpacking the Instrument
The product has been fully inspected and tested before shipping from the factory.
Upon receiving the instrument, immediately unpack and inspect it for any damages
that might have been sustained during transportation. If any sign of damage is found,
notify your local distributor immediately.
3.2 Checking the Line voltage
This instrument will operate on AC 220V or 110V. Before connecting the power plug
to an AC line outlet, make sure the voltage selector is set to the position
corresponding to the line voltage. Note that the instrument may be damaged if it is
connected to the wrong AC line voltage.
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WARNING .To avoid electrical shock the power cord
protective grounding conductor must be connected to ground.
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Replace the required fuses according to this table.
Line voltage Range Fuse (slow blow)
AC 220V 198V to 242V T 1A, 250V
AC 110V 100V to 120V T 2A, 250V
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WARNING: To avoid personal injury, disconnect the power
cord before removing the fuse holder.
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3.3 Cooling
Before applying power to the unit, make sure that the line voltage setting is correct
and the ventilation holes are not blocked. Ensure that the ventilation fan is working
well (it should turn on at power on condition).
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4. PANEL INTRODUCTION
4.1 Front panel
(1) green LED Display
3 digit display, continuously monitors voltage.
(2) red LED Display
3 digit display, continuously monitors current.
(3) Coarse VOLTAGE Control
Coarse adjustment of output voltage. Read value on green LED display.
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(4) C.V. (Constant Voltage) Indicator.
Green LED lights when the power supply is in Constant Voltage mode. The
power supply regulates the output voltage at the value set by the VOLTAGE
controls.
(5) Fine VOLTAGE Control
Fine adjustment of output voltage. Read value on green LED display.
(6) Hi/Low range AMP switch
There are 2 ranges of current limiting. When the switch is disengaged (OUT),
the maximum current of 3Amp can be output. Pressing this switch limits the
maximum current to 1.5A.
(7) Coarse CURRENT Control
Coarse adjustment of current limit in constant voltage mode. Adjusts constant
current value in constant current mode. Current can be read from red LED
display.
(8) C.C. (Constant Current) Indicator
Red LED lights when the power supply is in Constant Current mode. The Power
Supply regulates the output current at the value set by the CURRENT controls.
(9) Fine CURRENT Control
Fine adjustment of current limit in constant voltage mode. Adjusts constant
current value in constant current mode. Current can be read from red LED
display.
(10) POWER Switch.
Turns power on and off.
(11) “-” Terminal
Negative polarity output terminal
(12) GND
Earth and Chassis Ground.
(13) “+” Terminal
Positive polarity output terminal.
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4.2 Rear Panel
(14) Ventilation fan, ventilation holes
(15) Input voltage selector
Set switch to corresponding line voltage
(16) AC Power Input Connector
Connect the AC power cord to this receptacle
(17) Fuse Compartment
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Table of contents
