Global Specialties 1368 User manual

User Manual
1368
1369
1370
Triple Output Programmable Power Supplies

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Table of Contents
Safety .................................................................................................................... 3
Compliance and Certications............................................................................... 7
Introduction............................................................................................................ 8
Product Overview .................................................................................................. 9
Front Panel............................................................................................................ 9
Rear Panel........................................................................................................... 10
Display................................................................................................................. 11
Operation............................................................................................................. 12
Setting the Voltage and Current .......................................................................... 12
CH SET ............................................................................................................... 13
CH File................................................................................................................. 14
Menu Set ............................................................................................................. 14
Specications ...................................................................................................... 16
Interface and Communication.............................................................................. 17
RS-232 Interface ................................................................................................. 17
USB TMC ........................................................................................................... 19
USB CDC Virtual Serial Port ............................................................................... 21
Command Structure ............................................................................................ 21
SCPI Command................................................................................................... 22
Limited One-Year Warranty ................................................................................. 27
Service................................................................................................................. 28
© 2019 Global Specialties. All rights reserved.
Unauthorized duplication of Global Specialties documentation materials is strictly
prohibited. Customers are permitted to duplicate and distribute Global Specialties
documentation for internal educational purposes only.

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Safety
To avoid personal injury and/or product damage, review and comply with the following
safety precautions. These precautions apply to both operating and maintenance
personnel and must be followed during all phases of operation, service, and repair of
this meter. Before applying power be sure to:
• Read and understand the safety and operational information in this manual.
• Apply all the listed safety precautions.
• Verify that the voltage selector on the bottom of the power supply is set to the
correct line voltage. Operating the instrument at an incorrect line voltage will
void the warranty.
• Make all connections to the instrument before applying power.
• Do not operate the instrument in ways not specified by this manual or by
Global Specialties.
Failure to comply with these precautions or with warnings elsewhere in this manual
violates the safety standards of design, manufacture, and intended use of the
instrument. Global Specialties assumes no liability for a customer’s failure to comply
with these requirements.
Dry Conditions
Hands, shoes, oor, and work bench must be dry. Avoid making measurements with
dampness, or other environmental conditions that might affect safety.
Cleaning
Use a soft cotton cloth lightly moistened with a mild solution of detergent and
water. Do not allow any portion to be submerged at any time. Dry thoroughly before
attempting to make measurements. Do not use solvents or expose to solvent fumes
as they may cause deterioration or damage.
Do not Operate:
• In the presence of noxious, corrosive, flammable fumes, gases, vapors,
chemicals, or finely-divided particulates.
• In environments where there is a danger of any liquid being spilled on the
meter.
• In air temperatures exceeding the specified operating temperatures.
• In atmospheric pressures outside the specified altitude limits or where the
surrounding gas is not air.
Only for use in pollution degree 2 environments where non-conductive pollution
occurs except occasionally when a temporary conductivity caused by condensation is
expected.

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Denitions
MEASUREMENT CATEGORY - Classication of testing and measuring circuits
according to the types of mains circuits to which they are intended to be connected.
• MEASUREMENT CATEGORY I (CAT I): Measurement instruments whose
measurement inputs are not intended to be connected to the mains supply.
The voltages in the environment are typically derived from a limited-energy
transformer or a battery.
• MEASUREMENT CATEGORY II (CAT II) - measuring circuits connected
directly to utilization points of the low-voltage mains installation.
• MEASUREMENT CATEGORY III (CAT III) - measuring circuits connected to
the distribution part of the building’s low-voltage mains installation.
• MEASUREMENT CATEGORY IV (CAT IV) - measuring circuits connected at
the source of the building’s low-voltage mains installation
Do not use this instrument in an electrical environment with a higher category rating
than what is specied in this manual for this instrument. You must ensure that each
accessory you use with this instrument has a category rating equal to or higher than
the instrument’s category rating to maintain the instrument’s category rating. Failure
to do so will lower the category rating of the measuring system. Working CAT rating
is equal to that of the lowest rated element within the test set-up.
Electrical Power
This instrument is intended to be powered from a CATEGORY II mains power
environment. The mains power should be 110 V RMS or 220 V RMS. Use only the
power cord supplied with the instrument and ensure it is appropriate for your country
of use. Use only type T10AL 250 V fuses. To switch between 110/220 V settings,
slide the switch on the bottom of the unit.
Ground the Instrument:
To minimize shock hazard, the instrument case must be connected to an electrical
safety ground. This instrument is grounded through the ground conductor of the
supplied, three-conductor AC power cable. Do not alter or defeat the ground
connection. Without the safety ground connection, all accessible conductive parts
(including control knobs) may provide an electric shock. Failure to use a properly-
grounded approved outlet and the recommended three-conductor AC line power
cable may result in injury or death. Unless otherwise stated, a ground connection on
the instrument’s front or rear panel is for a reference of potential only and is not to be
used as a safety ground.

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Indoor Use:
This instrument is intended to be used in an indoor pollution degree 2 environment.
The operating temperature range is 0 °C to 40 °C and the operating humidity range is
up to 80% relative humidity with no condensation allowed. Measurement results may
be outside specications if the instrument is used in non-ofce-type environments.
Such environments may include rapid temperature or humidity changes, sunlight,
vibration and/or mechanical shocks, acoustic noise, electrical noise, strong electric
elds, or strong magnetic elds.
Do not Operate:
If the instrument is damaged, appears to be damaged, or if any liquid, chemical, or
other material gets on or inside the instrument, remove the instrument’s power cord,
remove the instrument from service, label it as not to be operated, and return the
instrument to Global Specialties for repair. Notify Global Specialties of the nature of
any contamination of the instrument.
Not for Critical Applications:
This instrument is not authorized for use in contact with the human body or for use as
a component in a life-support device or system.
Do not Touch Live Circuits
Do not Attempt Servicing:
Instrument covers must not be removed by operating personnel. Component
replacement and internal adjustments must be made by qualied service-trained
maintenance personnel who are aware of the hazards involved when the instrument’s
covers and shields are removed.
Under certain conditions, even with the power cord removed, dangerous voltages
may exist when the covers are removed. To avoid injuries, always disconnect the
power cord from the instrument, disconnect all other connections (for example,
test leads, computer interface cables, etc.), discharge all circuits, and verify there
are no hazardous voltages present on any conductors by measurements with
a properly-operating voltage-sensing device before touching any internal parts.
Verify the voltage-sensing device is working properly before and after making the
measurements by testing with known-operating voltage sources and test voltages.
Do not attempt any service or adjustment unless another person capable of
rendering rst aid and resuscitation is present. Hazardous voltages may be present
in unexpected locations in circuitry being tested when a fault condition in the circuit
exists
Do not insert any object into an instrument’s ventilation openings or other
openings.

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Servicing
Do not substitute parts that are not approved by Global Specialties or modify this
instrument. Return the instrument to Global Specialties for service and repair to
ensure that safety and performance features are maintained.
Cooling fans
This instrument contains one or more cooling fans. For continued safe operation of
the instrument, the air inlet and exhaust openings for these fans must not be blocked
nor must accumulated dust or other debris be allowed to reduce air ow. Maintain at
least 25 mm clearance around the sides of the instrument that contain air inlet and
exhaust ports. If mounted in a rack, position power devices in the rack above the
instrument to minimize instrument heating while rack mounted. Do not continue to
operate the instrument if you cannot verify the fan is operating (note some fans may
have intermittent duty cycles). Do not insert any object into the fan’s inlet or outlet.
Use Correctly Sized Wires:
To connect a load to the power supply, use a wire diameter large enough to handle
the maximum continuous output short-circuit current of the power supply without the
wire overheating.
For continued safe use of the instrument
• Do not place heavy objects on the instrument.
• Do not obstruct cooling air flow to the instrument.
• Do not place a hot soldering iron on the instrument.
• Do not pull the instrument with the power cord, connected probe, or connected
test lead.
• Do not move the instrument when a probe is connected to a circuit being tested
Safety Notes and Symbols
WARNING 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.
CAUTION 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.
The following symbol may appear on the product or in its documentation:
Caution, see documentation for details

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Compliance and Certications
CE Compliance
This product meets the essential requirements of the applicable European Directives
as follows:
• 2004/108/EC: Electromagnetic Directive (EMC)
• 2006/95/EC: Low Voltage Directive (LVD)
Disposal
(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.

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Introduction
Overview
The Performance Series (Models 1368, 1369, 1370) are linear triple output power
supplies with fully programmable isolated outputs. These outputs can be adjusted
independently or combined in series or parallel to output higher voltage or current.
Each model offers a different variable output voltage and current on two channels.
The third channel is rated at 6 volts, 5 amps. These supplies offer tracking mode
with user-congurable ratios between channels, access to a timer controlled output
function, and store/recall on up to 40 instrument settings per channel. Connecting to
a PC by USB or RS-232 enables remote instrument control using industry standard
protocols.
Features:
• Three independent and fully isolated channels
• Series and parallel modes connect channels to maximize output voltage or
current
• Fully programmable channels with Output On/Off control
• Simultaneous display of voltage and current settings on all three channels
• High programming and readback resolution of 1 mV / 0.1 mA
• Low ripple, noise, load, and line regulation
• Save and recall up to 40 instrument settings
• USB connector for firmware updates
• Remote sense
• Timer-controlled output function adjustable from 0.1 – 9999.9 s
• Tracking mode maintains a programmed ratio for connected channels
• PC connection/control through RS-232 or USB supporting standard SCPI
commands
• Intelligent fan control, energy saving and noise reduction
• Overvoltage (OVP) and overcurrent (OCP) protection
• Keylock function
Initial Inspection
These units are tested prior to shipment but an initial physical inspection should
be made to ensure that no damage has been sustained during shipment. After the
inspection, verify the contents of the shipment. The included items for this product
are:
• Power Supply
• AC Power Cable
• (2) 250 V Slow Blow Glass Fuses
• Certificate of Calibration and Test Report

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Product Overview
Front Panel
1 2
101112
4 7
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13
14
15
16
653
1. USB interface to update rmware
2. Model name and number
3. LCD display, 480 × 272 pixels, 24-bit color, 4.3-inch color TFT LCD screen
4. Adjustment knob, selection tool and ne adjustments
5. Arrow keys for moving the cursor
6. Numeric keys to input the specic values
7. [ON/OFF] key to turn on or off the three channel outputs simultaneously
8. [MENU] key for quick access to menu interface
9. [ENTER] key to input the data and can be used with the [LOCK/LOCAL] key to
take screenshots
10. Output terminals, channels 1, 2, and 3 from right to left
11. Soft keys to set the display content
12. Power switch to power the unit on or off
13-15. Output keys to individually turn on each of the channel outputs
16. [LOCK/LOCAL] key to lock the keys or switch from remote to local control. Can
be used with the [ENTER] key to take screenshots

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Rear Panel
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3456
2
3
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6
1. USB Interface for communication by PC via USB DEVICE
2. RS-232 Function is same as USB
3. Power socket connecting 115/230 V 50 Hz AC power supply
4. Remote test terminal adds same function as output in front panel, 4-terminal
sampling function is added for remote sense
5. Serial number
6. Thermostatically controlled fan