Global Specialties 1325 User manual

80W (16V/5A) Power Supply
with USB Output
User
Manual
1325
V A
OUTPUT
ON/OFF
USB
CHARGER
GND
OUTPUT 5 A MAX.
C.V.
Volt. Amp.
C.C.
Model: 1325- 110 V Power Supply
INPUT: 110 VAC, 60 Hz ~, 1.6 A
OUTPUT: 1-16 VDC, 0.5A
USB: 5 VDC, 1.2 A
1325

1
Safety Summary
The following safety precautions apply to both operating and
maintenance personnel and must be observed during all
phases of operation, service, and repair of this instrument.
Before applying power, follow the installation instructions
and become familiar with the operating instructions for this
instrument.
GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cabinet
must be connected to an electrical ground. This instrument
is grounded through the ground conductor of the supplied,
three-conductor ac power cable. The power cable must be
plugged into an approved three-conductor electrical outlet. Do
not alter the ground connection. Without the protective ground
connection, all accessible conductive parts (including control
knobs) can render an electric shock. The power cable meets
IEC safety standards.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of ammable
gases or fumes. Operation of any electrical instrument in such
an environment constitutes a denite safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
Instrument covers must not be removed by operating
personnel. Component replacement and internal adjustments
must be made by qualied maintenance personnel. Disconnect
the power cord before removing the instrument covers and
replacing components. Under certain conditions, even with
the power cable removed, dangerous voltages may exist. To
avoid injuries, always disconnect power and discharge circuits
before touching them.

2
DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT
Do not install substitute parts or perform any unauthorized
modications to this instrument. Return the instrument to
Global Specialties (Cal Test Electronics) for service and repair
to ensure that safety features are maintained.
WARNINGS AND CAUTIONS
WARNING and CAUTION statements, such as the following
examples, denote a hazard and appear throughout this
manual. Follow all instructions contained in these statements.
A WARNING statement calls attention to an operating
procedure, practice, or condition, which, if not followed
correctly, could result in injury or death to personnel.
A CAUTION statement calls attention to an operating
procedure, practice, or condition, which, if not followed
correctly, could result in damage to or destruction of parts or
the entire product.
WARNING
Do not alter the ground connection. Without the protective
ground connection, all accessible conductive parts (including
control knobs) can render an electric shock. The power
jack and mating plug of the power cable meet IEC safety
standards.
WARNING
To avoid electrical shock hazard, disconnect power cord before
removing covers. Refer servicing to qualied personnel.
CAUTION
Before connecting the line cord to the AC mains, check the
rear panel AC line voltage indicator. Applying a line voltage
other than the indicated voltage can destroy the AC line fuses.
For continued re protection, replace fuses only with those of

3
the specied voltage and current ratings.
CAUTION
This product uses components which can be damaged by
electro-static discharge (ESD). To avoid
damage, be sure to follow proper procedures
for handling, storing and transporting parts
and sub-assemblies which contain ESD-
sensitive components.
Compliance Statements
Disposal of Old Electrical & Electronic
Equipment (Applicable in the European Union and other
European countries with separate collection systems). This
product is subject to Directive 2012/19/EU of the European
Parliament and the Council of the European Union on
waste electrical and electronic equipment (WEEE), and in
jurisdictions adopting that Directive, is marked as being put on
the market after August 13, 2005, and should not be disposed
of as unsorted municipal waste. Please utilize your local
WEEE collection facilities in the disposition of this product and
otherwise observe all applicable requirements.

4
1 Introduction
The 1325 is a micro-controller based switching DC power
supply with a total supply capability of 80 W. By using a
digital + / - keypad operation control, you can easily set the
output voltage and current levels. The 1325’s small size and
quiet operation make it ideal for laboratory, work shop, or
educational applications where bench space is limited.
The 1325 has a USB charger output, constant current
operation, tracking OVP, oating ground design, small
footprint, output on/off push button and a small form factor.
1.1 Features
z80 W Power
zVoltage: 1 V to 16 V
zCurrent: 0 A to 5 A
zSmall compact size
z3-Digit display shows voltage or current
zAutomatic crossover and constant current (CC)
zConstant voltage operation
zUSB charging port, 5 VDC and 1.2 A Max
zTracking Over Voltage Protection (OVP)
zOver Temperature Protection (OTP)

5
1.2 Controls & Indicators
45
6
V A
OUTPUT
ON/OFF
USB
CHARGER
GND
OUTPUT 5 A MAX.
C.V.
Volt. Amp.
C.C.
Model: 1325- 110 V Power Supply
INPUT: 110 VAC, 60 Hz ~, 1.6 A
OUTPUT: 1-16 VDC, 0.5A
USB: 5 VDC, 1.2 A
1325
Figure 1 Front and Rear Panel
1
7
2
8
3
1. LCD Display Panel. 3-Digit display. Indicator will light
next to “Volt.” when voltage is being displayed or next to
“Amp.” when current is being displayed. Indicator light
will show when in (CV) Constant Voltage mode or (CC)
Constant Current mode.
2. Output On/Off Button. Push this button to turn the Main
output ON/OFF. When set to “OFF,” the display will show
“OFF.”
3. Voltage/Current Selection Buttons. Push “V” to view/
change the voltage settings. Push “A” to view/change the
current settings. To change the settings use the “+” and “-”
buttons.
4. Main Output Terminal Negative (-). Black color
5. Ground Terminal. Green color
6. Main Output Terminal Positive (+). Red color
7. USB Charging Port. 5 VDC. Use this to charge your
phone or other USB device. (Not all USB devices can
be charged using the charging port. Please refer to your
device’s documentation for compatibility issues.)
8. Power On/Off Toggle Switch

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2 Operating the Power Supply
2.1 Connection and Operation Procedure
1. Plug the unit into 110 VAC grounded outlet.
2. Switch on the power supply using the toggle switch on
the back and the LED display will come on showing
“OFF” indicating that output is off. The “Volt.” indicator
will light showing that you are displaying voltage. The
“C.V.” indicator will light showing that you are in Constant
Voltage mode.
3. Push “V” to view/change the voltage settings. Push “A” to
view/change the current limit settings.
4. The (+) and (-) keys are used to adjust the value of output
voltage or output current limit setting. Press the (+)/(-)
once to view the set value without changing the setting.
Press (+)/(-) again and the value will start to change.
5. Connect to your load positive to positive and negative to
negative.
6. Turn on the output terminal and check if display shows
(CV).
7. If display shows (CC), either your preset current limiting
value is too low or your load requires more voltage and
current. You need to re-access the voltage and current
requirement of your load and increase the voltage or
current accordingly until (CV) appears.
2.2 Automatic Crossover
The power supply functions as a constant voltage source (CV)
as long as the load current is less than the set current limit
value. When the load current is equal to or greater than the set
current limit value, the power supply will automatically cross
over to the constant current mode, voltage will drop, (CC)
will show on the LCD display panel and it will operate as a
constant current source.

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When the load current drops below the preset current limiting
value, the supply returns to constant voltage (CV) mode.
2.3 Tracking Output Over Voltage Protection (OVP)
This is to protect the connected load in the event that the
output voltage control circuit malfunctions. In the case where
the output voltage reaches 15% higher than the set voltage,
Over Voltage Protection will engage. The display will show
OVP and the main output will switch OFF. The protection
message can be cleared by powering up the unit again or by
pressing the output ON/OFF key.
2.4 Over Temperature Protection (OTP)
When the temperature inside the power supply becomes
higher than a predetermined value, the output of the power
supply will automatically switch OFF and the display will show
OTP. When the temperature inside the power supply drops to
an acceptable level, the protection message can be cleared by
powering up the unit again or pressing the output ON/OFF key.
2.5 Ground Connection
Depending on the application, the power supply output
terminals can be grounded in one of the following setups:
zNegative ground – black (-) negative terminal is shorted
with green GND terminal.
zPositive ground – red (+) positive terminal is shorted
with green GND terminal.
zFloating ground – green terminal is not shorted with
any of the output terminals.
When operating this power supply as a oating ground, high
impedance leakage can exist between the power supply
circuitry and the chassis ground.

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3 Specications
All specications apply to the unit after a temperature
stabilization time of 15 minutes over an ambient temperature
range of 25 °C ± 5 °C.
1325 Power Supply
Electrical Specicaitons
Output Voltage 1–16 VDC
Output Current 0-5 A
Switching Operation Frequency 75 kHz to 95 kHz
Efciency at Max Power ≥82%
Voltmeter and Ampmeter Display 3 Digit 7-Segments
LED
Voltmeter Accuracy ±1% rdg + 3 digits
Ammeter Accuracy ±1% rdg + 5 digits
Resolution 0.1V, 0.01A
Line Input 120 VAC (50-60 Hz)
±10%
Full Load Input Current at 120 VAC 1.8 A
Cooling System Natural Convection
Constant Voltage Characteristics
Load regulation (10%-90%) ±50 mV
Line regulation (min to max) ±20 mV
Ripple (rms) ±20 mV
Noise (peak to peak) ±100 mV
Constant Current Characteristics
Load regulation (10%-90%) ±30 mA
Line regulation (min to max) ±10 mA
USB Output

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Output Voltage 5 V (±5%)
Output Current 1.2 A Max
Environmental Conditions
Operating Temp/Humidity
max RH of 80% at
31°C decreasing
linearly to 50% at
40°C
Altitude up to 2,000 m
Polution Degree Polution Degree 2
Mechanical Characteristics
Weight 3.0 lbs (1.4 kg)
Dimensions 2.8 x 6.0 x 7.9 in
(70 x 150 x 200 mm)
Specications are subject to change without notice. To ensure
the most current version of this manual, please download the
current version from our website: globalspecialties.com.

10
4 Service and Warranty Information
4.1 Limited One-Year Warranty
Cal Test Electronics warrants this product to be free from defective
material or workmanship for a period of 1 year from the date of original
purchase. Under this warranty, Cal Test Electronics is limited to repairing
the defective device when returned to the factory, shipping charges
prepaid, within the warranty period.
Units returned to Cal Test Electronics that have been subject to abuse,
misuse, damage or accident, or have been connected, installed or
adjusted contrary to the instructions furnished by Cal Test Electronics, or
that have been repaired by unauthorized persons, will not be covered by
this warranty.
Cal Test Electronics reserves the right to discontinue models, change
specications, 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 Cal Test Electronics is
authorized to assume any other obligation in connection with the sale and
purchase of this device.
4.2 Calibration and Repair
If you have a need for any calibration or repair services, please visit us on
the web at: globalspecialties.com. See the “Service” tab. Or contact us via
the “Contact” tab. You may also contact us at:
Global Specialties®
(A Cal Test Electronics Company)
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
800-572-1028 or 714-221-9330
globalspecialties.com

450864-001 Rev. B