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Complain wrong Brand wrong Model non readable. Accessories 1. Safety Symbols 1. Isolated Load Connections, Local Sensing 2. Isolated Load Connections, Remote Sensing 2. Memory Location Worksheet 3. RS Implementation 3. Message Structure 3.
Factory Default Calibration Passwords 4. IEEE Programming the Output B. Using Calibration Commands and Queries B. Query B. Using Display Commands B. Data Separator Message Unit Separator Root Specifier Message Terminator Understanding The Command Structure Program Message Syntax Summary Operator Maintenance Equipment Required Calibration Procedures Voltage Calibration Current Calibration Changing the Calibration Password Restoring Previous Calibration Values Restoring Factory Calibration Values Setting Factory Calibration Values ABORt Command Ripple and Spike Measurement Cables Grounded Load Connections, Local Sensing Isolated Load Connections, Local Sensing Grounded Load Connections, Remote Sensing Isolated Load Connections, Remote Sensing Message Structure GPIB Commands Programming the Output Using Calibration Commands and Queries Using Display Commands Programming Current Programming Voltage Using Status Commands and Queries Using Sytem Commands and Queries Model Parameters Maximum Overvoltage and Overcurrent Settings ABC Specifications Safety Symbols Key Functions Memory Location Worksheet Rules Governing Shortform Keywords Factory Default Calibration Passwords IEEE Error Messages Master Passwords This manual contains instructions for the installation and operation of the ABC series of Watt bench-top, voltage and current stabilized d-c power supplies manufactured by Kepco, Inc.
Although ABC is a stand-alone, bench top design, rack mounting can also be accommodated by rack adapters available for standard inch wide racks see Figures and Load connections may be made either at front panel terminals, or at a barrier terminal strip located at the rear. Voltage and current are displayed on a two-line alphanumeric LCD display.
Table below indicates parameters that vary for different ABC models; Table lists the Overcurrent and Overvoltage Range for each model. Table lists general specifications that apply to all ABC models. Front panel keypad entries are utilized for setting and adjusting output voltage and current under local control. The keypad's keys are organized to either directly execute commands, or to introduce a program that can either be run once or cycled.
Calibration of the unit is facilitated by a password -protected, menu-driven procedure from the front panel. All features available in local mode can also be accessed remotely. Calibration is done entirely via the keypad using digital entries and a calibrated DVM and precision shunt resistor. Calibration instructions appear on the front panel after a password is entered; previous calibration values are saved and can be restored if desired.
The original factory calibration values can also be restored. Refer to Section 4. Overvoltage and Overcurrent protection values can be individually programmed. The maximum values are listed in Table Refer to PAR. Protection can be delayed up to approximately 8 seconds after the output settings are changed. The ABC Power Supply contains 40 memory locations that can be used either to preprogram a sequence of output values or to store the active settings.
For programming sequences each memory location accommodates six parameters: output voltage, output current, Overvoltage, Overcurrent, Time how long the parameters are in effect and the next address in the sequence. Values are stored in the non-volatile memory, and are retained when the unit is turned off.
The saved setting can be recalled by specifying the memory location. The ABC output can be programmed not to exceed user-defined values. Once the limits are set, the power supply becomes, in effect a 5. There are no operator serviceable parts inside the case. Service must be referred to authorized personnel. Using the power supply in a manner not specified by Kepco. Observe all safety precautions noted throughout this manual.
Table lists symbols used on the power supply or in this manual where applicable. To accurately verify that ABC Power Supply ripple and noise parameters are within the specification limits listed in Table , speciaized test cables are required not supplied. Figure illustrates the requirements for two cables, one for ripple measurement and one for spike measurement.
This instrument has been thoroughly inspected and tested prior to packing and is ready for operation. After careful unpacking, inspect for shipping damage before attempting to operate. Perform the preliminary operational check as outlined in PAR.
If any indication of damage is found, file an immediate claim with the responsible transport service. This power supply operates from single phase a-c mains power over the specified voltage and frequency ranges Table without any need for range selection. The power devices used within the power supply are maintained within their operating temperature range by means of internal heat sink assemblies cooled by convection.
Periodic cleaning of the power supply interior is recommended. If the power supply is located within a confined space, care must be taken that the ambient temperature, which is the temperature of the air immediately surrounding the power supply, does not rise above the specified limits see Table A simple operational check after unpacking and before equipment installation is advisable to ascertain whether the power supply has suffered damage resulting from shipping.
Refer to Figures and for location of operating controls and electrical connections. Each time the unit is turned on and an internal self-test is performed. If the test is successful the indications of step 3 are visible. After approximately 2 seconds, the display changes to the power on default values: Local mode, Constant Voltage CV mode, 0. Overcurrent and Overvoltage protection are set to the maximum values Table , but are not displayed. NOTE: Six keys with dual functions are labeled with both a command and a number.
The command label is referred to when the unit is in command entry status; the number is referred to when the unit is in data entry status. Press VSET key. Use number keys to enter rated maximum voltage e. Output voltage will be displayed at bottom left of LCD. A bail located on the bottom of the unit can be utilized to raise the front of the unit about two inches for ease of accessing the front panel keypad and LCD display. For rack mounting, refer to Figures and Interconnections between an a-c power source and a power supply, and between the power supply and its load are as critical as the interface between other types of electronic equipment.
If optimum performance is expected, certain rules for the interconnection of source, power supply and load must be observed by the user. These rules are described in detail in the following paragraphs. Local, national and international safety rules dictate the grounding of the metal cover and case of any instrument connected to the a-c power source, when such grounding is an intrinsic part of the safety aspect of the instrument.
The ground terminal of the source power connector Figure is connected to the ABC chassis and the instructions below suggest wiring methods which comply with these safety requirements; however, in the event that the specific installation for the power system is different from the recommended wiring, it is the customer's responsibility to ensure that all applicable electric codes for safety grounding requirements are met.
Source power is connected to the power supply via the three-wire power input cable supplied. See Table for source power specifications. Connections between the power supply and the load and sensing connections may, despite all precautions such as shielding, twisting of wire pairs, etc. The success of d-c grounding requires careful analysis of each specific application, however, this recommendation can only serve as a general guideline.
Ground loops are created when two or more points are grounded at different physical locations along the output circuit. Due to the interconnection impedance between the separated grounding points, a difference voltage and resultant current flow is superimposed on the load.
If there is a choice in selecting either the positive or negative output of the power supply for the d-c ground point, both sides should be tried, and preference given to the ground point producing the least noise. For single, isolated loads the d-c ground point is often best located directly at one of the output terminals of the power supply; when remote error sensing is employed, d-c ground may be established at the point of sense lead attachment.
In the specific case of an internally-grounded load, the d-c ground point is automatically established at the load. Output ripple specifications as measured at the output are equally valid for either side grounded. Care must be taken in measuring the ripple and noise at the power supply: measuring devices which are a-c line operated can often introduce additional ripple and noise into the circuit. Individual applications, location and nature of the load require careful analysis in each case.
Grounding a single point in the output circuit can be of great importance. It is hoped that the preceding. Welcome to ManualMachine. We have sent a verification link to to complete your registration. Log In Sign Up. Forgot password? Enter your email address and check your inbox. Please check your email for further instructions. Enter a new password. Data subject to change without notice. Flushing, N. ABC i. A-1 A. A-2 A. A-3 A. A-4 A. A-5 A. A-6 A.