OPERATOR’S MANUAL BOP 1000W HIGH POWER BIPOLAR POWER SUPPLY KEPCO INC. An ISO 9001 Company. MODEL BOP 1000W POWER SUPPLY ORDER NO. REV. NO. IMPORTANT NOTES: 1) This manual is valid for the following Model and associated serial numbers: MODEL SERIAL NO. REV. NO. 2) A Change Page may be included at the end of the manual. All applicable changes and revision number changes are documented with reference to the equipment serial numbers.
Declaration of Conformity Application of Council directives: 73/23/EEC (LVD) 93/68/EEC (CE mark) Standard to which Conformity is declared: EN61010-1:1993 (Safety requirements for electrical equipment for measurement, control and laboratory use) Manufacturer's Name and Address: KEPCO INC. 131-38 SANFORD AVENUE FLUSHING, N.Y. 11355 USA Importer's Name and Address: OPY C E V I T A T N REPRESE Type of Equipment: Component Power Supply Model No.
Conditions of Conformance When this product is used in applications governed by the requirements of the EEC, the following restrictions and conditions apply: 1. For European applications, requiring compliance to the Low Voltage Directive, 73/23/EEC, this power supply is considered a component product, designed for "built in“ applications.
SAFETY INSTRUCTIONS 1. Installation, Operation and Service Precautions This product is designed for use in accordance with EN 61010-1 and UL 3101 for Installation Category 2, Pollution Degree 2. Hazardous voltages are present within this product during normal operation.
OPERATOR SAFETY INSTRUCTIONS Read these safety instructions, as well as the applicable installation and operating instructions contained in this manual before using the power supply. WARNING Do not touch the output terminals. The output is dangerous. Electric shock can cause injury or death. Do not remove the cover or disassemble the unit. There are no operator serviceable components or adjustments inside the unit.
LIST OF WARNINGS AND CAUTIONS PAGE WARNING/CAUTION 3-19 WARNING: For inductive loads, and especially superconducting magnet type loads, 3-19 WARNING: For both inductive loads and constant-current-type active electronic 3-19 WARNING: Accessing the BOP after the output is disabled in BATTERY mode is haz- 3-28 WARNING: Be sure that output power is OFF (Standby indicator lit) while connecting 4-8 WARNING: The sense resistor will be dissipating full rated current of the BOP.
LIST OF WARNINGS AND CAUTIONS PAGE WARNING/CAUTION 2-8 CAUTION: When working with active loads, the voltage or current of the active load must not exceed the maximum voltage or current rating of the BOP. Otherwise the overvoltage or overcurrent protection will shut down the power supply. 2-10 CAUTION: Never connect the load to the sense terminals. Monitoring instruments (e.g., DVM, etc.) are the only external equipment that may be safely connected to the sense terminals.
TABLE OF CONTENTS SECTION PAGE SECTION 1 - INTRODUCTION 1.1 1.2 1.3 1.4 1.5 1.6 1.6.1 1.6.2 1.6.3 1.6.4 1.6.5 1.6.6 1.6.7 1.6.8 1.6.9 1.7 1.8 1.9 Scope of Manual ..................................................................................................................................... 1-1 General Description................................................................................................................................. 1-1 Specifications .........................................
TABLE OF CONTENTS SECTION 3.2.4 3.2.4.1 3.2.4.2 3.2.4.3 3.2.4.4 3.2.5 3.2.5.1 3.2.5.2 3.2.5.3 3.3 3.3.1 3.3.1.1 3.3.1.2 3.3.2 3.3.3 3.3.3.1 3.3.3.2 3.3.3.3 3.3.4 3.3.4.1 3.3.4.2 3.3.4.3 3.3.5 3.3.6 3.3.7 3.3.8 3.3.8.1 3.3.8.2 3.3.8.3 3.3.8.4 3.3.8.5 3.3.9 3.3.9.1 3.3.9.2 3.3.9.3 3.3.9.4 3.3.9.5 3.3.9.6 3.3.9.7 3.3.9.8 3.3.9.9 3.3.9.10 3.3.10 3.3.11 3.3.12 3.4 3.4.1 3.4.1.1 3.4.1.2 3.4.2 3.4.3 3.4.3.1 3.4.3.2 3.4.4 3.4.4.1 3.4.5 3.5 ii PAGE How to Access the menus ........................................
TABLE OF CONTENTS SECTION PAGE 3.5.1 Operating Features Available only by Remote Commands............................................................... 3-41 3.5.1.1 Expanded Waveforms and Programs .......................................................................................... 3-41 3.5.2 Programming Techniques to Optimize performance ......................................................................... 3-41 3.5.2.1 Programming Voltage/Current Limit and Current/Voltage Limit.................
TABLE OF CONTENTS SECTION 3.6.7 3.6.7.1 3.6.7.2 3.6.7.3 3.6.8 PAGE Status Reporting ............................................................................................................................... Status Reporting Structure.......................................................................................................... Operational Status Register ........................................................................................................ QUEStionable Status Register...
TABLE OF CONTENTS SECTION B.17 B.18 B.19 B.20 B.21 B.22 B.23 B.24 B.25 B.26 B.27 B.28 B.29 B.30 B.31 B.32 B.33 B.34 B.35 B.36 B.37 B.38 B.39 B.40 B.41 B.42 B.43 B.44 B.45 B.46 B.47 B.48 B.49 B.50 B.51 B.52 B.53 B.54 B.55 B.56 B.57 B.58 B.59 B.60 B.61 B.62 B.63 B.64 B.65 B.66 B.67 B.68 B.69 B.70 B.71 B.72 B.73 PAGE [SOURce:]FUNCtion:MODE? Query..................................................................................................... [SOURce:]FUNCtion:MODE:TRIGger Command........................
TABLE OF CONTENTS SECTION B.74 B.75 B.76 B.77 B.78 B.79 B.80 B.81 B.82 B.83 B.84 B.85 B.86 B.87 B.88 B.89 B.90 B.91 B.92 B.93 B.94 B.95 B.96 B.97 B.98 B.99 B.100 B.101 B.102 B.103 B.104 B.105 B.106 B.107 B.108 B.109 B.110 B.111 B.112 B.113 B.114 B.115 B.116 B.117 B.118 B.119 B.120 vi PAGE [SOURce:]VOLTage[:LEVel]:LIMit:positive? Query .............................................................................. [SOURce:]VOLTage:MODe Command...............................................................
LIST OF FIGURES FIGURE 1-1 1-1 1-2 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 2-11 2-12 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 3-11 3-12 3-13 3-14 3-15 3-16 3-17 3-18 3-19 3-20 3-21 4-1 4-2 4-3 A-1 B-1 B-2 B-3 B-4 B-5 B-6 TITLE PAGE High Power BOP Series Power Supply ......................................................................................................... x 1000W BOP Power Supply, Outline Drawing ............................................................................................
LIST OF TABLES TABLE 1-1 1-2 1-3 1-4 1-5 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 2-11 2-12 2-13 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 3-11 3-12 3-13 3-14 3-15 3-16 3-17 3-18 3-19 3-20 3-21 4-1 4-2 4-3 4-4 4-5 A-1 A-2 A-3 A-4 B-1 B-2 B-3 B-4 B-5 TITLE PAGE BOP 1000 Watt Model Parameters .............................................................................................................1-1 BOP General Specifications .............................................................................
FIGURE 1-1.
SECTION 1 - INTRODUCTION 1.1 SCOPE OF MANUAL This manual contains instructions for the installation, operation and servicing of the BOP series of 1000 Watt rack-mounted, 4-quadrant bipolar, programmable, voltage and current stabilized d-c power supplies manufactured by Kepco, Inc., Flushing, New York, U.S.A. NOTE:This manual does not apply to units with Firmware Rev less than 2.0. 1.
TABLE 1-2. BOP GENERAL SPECIFICATIONS SPECIFICATION RATING/DESCRIPTION CONDITION INPUT CHARACTERISTICS a-c voltage nominal range Frequency Current Power factor 176 - 264 Va-c nominal 50-60 Hz range 47 - 65 Hz >65 Hz, leakage exceeds spec 176 Va-c 9.5A maximum 6.4A maximum Source 0.99 minimum Sink 0.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION CONDITION 5 ms (default) range (voltage or current): 500µsec to 500ms range (voltage + current): 1msec to 250ms OUTPUT CHARACTERISTICS (Continued) Readback rate/array Voltage stabilization in voltage mode measurement rate measurement array Current load effect 0.1% of rating 0-100% load current time effect (drift) 0.02 of rating 0.5 through 8 hours 0.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION CONDITION PROGRAMMING/DISPLAY CHARACTERISTICS Analog control Main channel (voltage or current) Protection Limit channels: +Voltage, –Voltage +Current, –Current External mode control –10V to +10V Full range output, 20K Ohm input impedance (see PAR. 3.4) +1V to +10V 10% to 100% of Nominal Range. Input voltage clamped to 12V through 1K ohms. Maximum of 0.15mA input current at1V input voltage.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION CONDITION FUNCTION GENERATOR CHARACTERISTICS (Continued) Maximum number of points per basic waveform Local: 3933 Remote: Can be set to either 3933 (normal resolution- default value) or 5760 (high resolution), using the LIST:RES command. • Each basic waveform (sine, triangle, ±ramp, square and level) is constructed using a different number of points, depending on the basic waveform, type and frequency.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION CONDITION FUNCTION GENERATOR CHARACTERISTICS (Continued) LIST command characteristics for "string" type waveform (Remote only) Maximum number of points • For single (global) dwell time: 5900 (high resolution) • For <126 different dwell times: 3933 • For >126 different dwell times: 2950 Note: Dwell time list must match (balance) the amplitude list.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION CONDITION FUNCTION GENERATOR CHARACTERISTICS (Continued) Amplitude Resolution (Programming) Main Channel and Offset Voltage (millivolts a-c) .35 (millivolts d-c) Current (milliamperes a-c) 1 .35 (millivolts d-c) Protection Limit Channel . Current, bipolar (Amperes) Voltage, bipolar (Volts) 1 Sine Triangle, Square, ±Ramp, Level: Sine Triangle, Square, ±Ramp, Level: 0.1 0.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION CONDITION MISCELLANEOUS FEATURES Maximum/Minimum Settings Protection Limit Type Main Channel Protection Limit Channel (maximum value, Internal) Bipolar (default) or Independent 0 to EONOM or IONOM (default) Software limit to setting of main channel Voltage (Volts) for Voltage mode, Current (Amperes) for Current mode EOMIN or IOMIN to 1.01 EONOM or IONOM (internal) Software limit to setting of protection limit channel.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION CONDITION GENERAL (ENVIRONMENTAL) CHARACTERISTICS Temperature operating storage 0 to +50 deg C -20 to +85 deg C Cooling Two internal fans Humidity 0 to 95% RH Shock 20g.
1.738 [44.15] 23.863 [606.12] 22.000 [558.79] 21.564 [547.73] 20.000 [508.00] 21.439 [544.54] 22.800 [579.11] 18.805 [477.63] 18.018 [457.64] 17.675 [448.93] 16.835 [427.60] 18.235 [463.16] 18.985 [482.21] FIGURE 1-1. 1-10 2.215 [56.27] 1.470 [37.34] 5.218 [132.54] OBROUND 0.25x0.
REAR VIEW 22.000 [558.79] SLIDES TRAVEL DISTANCE: 23.000 [584.2] SEE NOTE 6. FIGURE 1-1.
1.4 LOCAL CONTROL Either the front panel keypad or the adjust control can set and adjust output voltage and current under local control. The display provides a digital display of output voltage and current as well as a pictorial display of real-time analog voltage and current meters. The keypad includes five function keys which provide access to the menu-driven functions of the unit.
to be repeated). Each waveform consists of up to 10 segments; each segment is assigned one of six basic waveform types: square, sine, triangle, negative ramp, positive ramp and level. Depending on the waveform type, frequency, peak-to-peak amplitude, offset, and start and stop phase angle are then assigned by the user. Segments at the beginning of the waveform can be programmed to be executed only once, or to be repeated as specified by the count.
pating energy from an active load. To minimize energy dissipation, the BOP employs energy recuperation, where energy sinked from an active load is passed backwards through the output circuit and the bidirectional input power factor correcting circuit to the a-c power lines, where it becomes available for reuse. This technology allows high power levels using switch-mode technology while maintaining high efficiency and reduced size and weight. FIGURE 1-2.
1.7 EQUIPMENT SUPPLIED Equipment supplied with the BOP power supply is listed in Table 1-3. TABLE 1-3. EQUIPMENT SUPPLIED ITEM FUNCTION PART NUMBER Source Power Entry mating connector Mates with source power entry connector 142-0381 (Kepco) (IEC 320) PAR/SER CONTROL - IN mating connector Mates with PAR/SER CONTROL - IN port to allow access to pins required for calibration 142-0488 (Kepco) 1.8 ACCESSORIES Accessories for the BOP Power Supply are listed in Table 1-5. 1.
TABLE 1-5. ACCESSORIES ITEM FUNCTION PART NUMBER Mating Connector, Trigger Mates with Trigger port. 142-0527 (Kepco) SP2501 (CUI Stack) IEEE 1118 (BITBUS) Mating connector Allows connection to IEEE 1118 (BITBUS) port. 142-0485 (Kepco) KMDLA-5P (Kycon Inc.) IEEE 488 Cable, (1 meter long) Connects BOP power supply to GPIB bus. SNC 488-1 IEEE 488 Cable, (2 meter long) Connects BOP power supply to GPIB bus. SNC 488-2 IEEE 488 Cable, (4 meter longs) Connects BOP power supply to GPIB bus.
SECTION 2 - INSTALLATION 2.1 UNPACKING AND INSPECTION 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. 2.3. If any indication of damage is found, file an immediate claim with the responsible transport service. 2.2 TERMINATIONS AND CONTROLS a) Front Panel: Refer to Figure 3-1 and Table 3-1.
TABLE 2-1.
TABLE 2-2. IEEE 1118 CONNECTOR INPUT/OUTPUT PIN ASSIGNMENTS CONNECTOR IEEE 1118 (BITBUS) PORT (connector A1J4) PIN SIGNAL NAME FUNCTION 1, 3 (shorted) CONTROL BUS “A” IEEE 1118, referenced to pins 5, 8 (2-Wire Differential Interface) 5, 8 (shorted) CONTROL BUS “B” IEEE 1118, referenced to pins 1, 3 (2-Wire Differential Interface) 6 TERMINATOR Connect to pin 5 or 8 to add an internal termination resistor to first/last unit on the daisy chain. TABLE 2-3.
TABLE 2-5. RS232C PORT INPUT/OUTPUT PIN ASSIGNMENTS CONNECTOR PIN RS 232 PORT A1J5 SIGNAL NAME FUNCTION 1 RTS Request To Send (protocol not used) 2 RXD Receive Data 3 TXD Transmit Data 4 LOGIC GND Logic Ground 5 LOGIC GND Logic Ground 6 CTS Clear To Send (protocol not used) TABLE 2-6.
TABLE 2-8. PARALLEL/SERIAL PROTECT IN PORT PIN ASSIGNMENTS CONNECTOR PIN SIGNAL NAME Anode of LED optocoupler which is part of protection circuit for parallel or series combination. Cathode of LED is connected to PARALLEL/ SERIAL PROTECT OUT PORT (A2A5J2) pin 1 (see Table 2-9). When activated, the optocoupler shuts down the unit. LEDs from all units of the parallel or series combination are connected in series.
TABLE 2-10. ANALOG I/O PORT INPUT/OUTPUT PIN ASSIGNMENTS CONNECTOR PIN SIGNAL NAME FUNCTION CAUTION: IT IS RECOMMENDED THAT SOURCE POWER OF EXTERNAL EQUIPMENT CONNECTED TO THE ANALOG PORT BE APPLIED THROUGH AN ISOLATING TRANSFORMER TO AVOID GROUND LOOPS OR POSSIBLE DAMAGE TO THE BOP DUE TO INCORRECT EQUIPMENT A-C WIRING (E.G., DEFEATING OF GROUND CONNECTION).
1. With POWER switch set to off position, connect the power supply to source power (see PAR. 2.5.2). 2. With no load connected, set POWER switch to the ON position. Each time the unit is turned on an internal self-test is performed. The alphanumeric display (LCD) shows the processor firmware revision history and lists various tests performed during the internal self-test. As each test is completed, PASS or FAIL is displayed. If all tests pass, the unit goes into the default mode.
2.4 INSTALLATION 2.4.1 RACK MOUNTING The unit is shipped with four feet attached to bottom of the unit which must be removed prior to installation (see Figure 1-1). The BOP is designed to be rack mounted in a standard 19-inch wide rack using the mounting ears (supplied) attached to the front panel (see Figure 1-1). CAUTION: THE RACK MUST PROVIDE SUPPORT AT THE REAR (WITHIN 6 INCHES OF THE REAR PANEL). OPTIONAL SLIDES CAN ALSO BE USED (SEE PAR. 2.4.2). 2.4.
One of the most important considerations in establishing a successful grounding scheme is to avoid GROUND LOOPS. 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.
The stabilized d-c power supply is definitely not an ideal voltage or current source, and practical interfaces definitely fall short of the ideal. All voltage-stabilized power supplies have a finite source impedance which increases with frequency, and all current-stabilized power supplies have a finite shunt impedance which decreases with frequency.
2.6 COOLING The power devices used within the power supply are maintained within their operating temperature range by means of internal heat sink assemblies and by two cooling fans. Periodic cleaning of the power supply interior is recommended. If the power supply is located within a confined space, take care 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 1-2). 2.
FIGURE 2-3. 2.7.3 LOAD CONNECTIONS, REMOTE SENSING SETUP FOR REMOTE OPERATION VIA GPIB With all power off, connect the load to the BOP using either local or remote sensing. If units are to be connected in series or parallel, refer to PAR. 2.8. Connect the GPIB connector to the GPIB port (see Figure 2-1 and Table 2-1). Turn power on and refer to PAR. 3.2 for power supply basics and PAR. 3.5 for remote mode programming. The default GPIB address is 6; to change it refer to PAR 3.5.3.1.
parallel. Similarly, up to three units can be connected in series to increase the voltage: EMAX (one unit) x NS = EMAX (parallel combination) where NS = number of units in series. In addition, identical units may be connected in both series and parallel. The 2 X 2 configuration, two parallel branches of two series-connected power supplies, doubles the output voltage and doubles the output current of a single unit.
FIGURE 2-4.
FIGURE 2-5.
FIGURE 2-6.
FIGURE 2-7.
FIGURE 2-8. TYPICAL MASTER/SLAVE PROTECTION INTERCONNECTIONS Upon startup, PAR/SER PROT IN PORT pin 8 of the master goes low, and stays low until all slaves are powered up. Normal power up of a unit causes the transistor connecting PAR/SER PROT IN PORT pin 2 and PAR/SER PROT OUT PORT pin 2 to conduct.
TABLE 2-12. MULTIPLE UNITS MENU FUNCTIONS SETTING CHOICES (BOLD = Factory Default) FUNCTION CONFIGURATION STANDALONE PARALLEL SERIES MASTER 2 X 2 MASTER 3 X 2 STANDALONE - Unit operates independently, no additional units connected. PARALLEL - Unit to be configured for parallel operation; opens UNIT TYPE and CONNECTION TYPE options shown below. Used when units are connected in parallel (increase output current) (see NOTE below).
3. Turn on the unit to be configured as a master and note that upon power up the FAULT light will go on (this is normal). Proceed as follows: a. From the power-up screen press % to enter the General Setup Menu. Highlight Series/ Parallel and press ! to view the Multiple Units menu (see Table 2-12). When prompted, enter ADMIN2 password (see PAR. 3.2.4.4) before continuing. b. From the Multiple Units menu, highlight Configuration (use ADJUST control or the Y or U keys) and press ! to modify.
TABLE 2-13. SLAVE STATUS MESSAGE DEFINITIONS Slave Status Message Displayed on Master Power Up Screen (see Figure 2-9) Ready STANDBY Powered OFF Failed MEANING Unit is ready for operation. If unit’s FAULT indicator is off, hardware error has NOT been detected, output is ready to be turned on Unit is not responding to polls via BITBUS. Unit’s FAULT indicator is on to indicate a hardware error has been detected.
VOLTAGE SOURCE 0.0000 FIGURE 2-11. 2.8.4 POWER ON DEFAULT SCREEN FOR SLAVE UNIT OPERATING INSTRUCTIONS FOR MULTIPLE UNIT COMBINATIONS 1. Apply power to the combination by first turning on the master, then turn on the slave(s). If the master is in STANDBY, depress STANDBY key on the master to apply power to the output terminals. (To power down the combination, first press STANDBY key on the master to disable the output, then turn off the slave, followed by the master. 2.
2.8.5 RESTORING A UNIT TO STANDALONE OPERATION 1. Turn off power to the master. 2. Turn off power to the slave(s). 3. Turn on power to the unit to be restored to standalone operation. 4. From the power-up screen press % to enter the General Setup Menu. Highlight Series/ Parallel and press ! to view the Multiple Units menu (see Table 2-12). When prompted, enter ADMIN2 password (see PAR. 3.2.4.4) before continuing. 5. Press @ to return to factory defaults. This configures the unit as a standalone unit. 6.
FIGURE 2-12.
SECTION 3 - OPERATION 3.1 GENERAL This section explains how to operate the 1000 Watt BOP Power Supply. The power supply can be operated either in Local mode (see PAR’s. 3.2 and 3.3) using the front panel keypad, ADJUST control and graphical display, or in Remote mode. NOTE: Unless otherwise noted, operating instructions start from the power-up screen (see either Figure 3-3 or Figure 3-4). Press % to exit submenus and return to the power-up screen. Remote mode can either be analog or digital.
TABLE 3-1. FRONT PANEL CONTROLS AND INDICATORS NUMBER (FIGURE 3-1) CONTROL/INDICATOR 1 POWER ON/OFF circuit breaker A7CB1 2 Alphanumeric/graphic Display (LCD) Displays output voltage and current as well as information in response to keypad and ADJUST control entries. Displays function of soft function keys F1 through F5, and displays information as required to perform all local functions. 3 STANDBY indicator Lights to indicate when the unit is in Standby mode.
TABLE 3-2. SPECIAL KEY FUNCTIONS KEY FUNCTION STANDBY The STANDBY key toggles the unit between output on (enabled, STANDBY indicator off) and output off (disabled, STANDBY indicator on). When on, the output goes to the programmed settings. Behavior of the unit in Standby (Output off) is determined by the options chosen for Load Type (see PAR. 3.3.6). The default Load Type is ACTIVE, i.e.
VOLTAGE SOURCE 0.0000 0.0402 VOLTAGE 0.0000 FIGURE 3-3. POWER-UP SCREEN SHOWING GRAPHIC METERS VOLTAGE SINK 0.0000 0.0402 VOLTAGE 0. 0000 FIGURE 3-4. POWER-UP SCREEN SHOWING TIME LINE GRAPH When in Voltage mode, the power supply will (within the configured and rated limits) provide the programmed output voltage. Current is determined by the load, and cannot exceed the Current Protect limits. Mode displayed at the upper right is VOLTAGE SOURCE. If the protect limit is reached, CPROTECT is displayed.
When in Sink mode, the power supply is operating as an electronic load, absorbing and recuperating the energy of an active load. Recuperated energy is passed back into the a-c source power line. Mode displayed at the upper right is VOLTAGE SINK when the unit is in voltage mode and an external constant current is injected into the BOP. Correspondingly, CURRENT SINK is displayed when the unit is in current mode and an injected current from an external constant voltage is presented at the output of the BOP.
If the display is not viewable, press # twice. The display will cycle through the range of contrast settings. Press # again to lock in the preferred contrast. To select between the meter (Figure 3-3) and time line (Figure 3-4) displays refer to PAR. 3.2.5.3. To change the default power-up settings, refer to PAR. 3.3.7. 3.2.4 HOW TO ACCESS THE MENUS From the power-up screen, pressing the Function keys indicated on the LCD opens the associated menu.
3.2.4.
reconfiguration of the BOP, yet allow access to qualified personnel. These password levels apply only to local operation. When in remote, only the main password is accessible, acting as a general password (see PAR B.111). The functions that can be password protected are Interface settings, Max/Min settings, Load type, Test, Calibration, Power-up Settings, and Keypad lockout at power-up.
1. Enter the first character of the password using the keypad or ADJUST control (see PAR. 3.2.4.2 for entry of alphanumeric characters). (To change the password, refer to PAR. 3.2.4.3.) 2. Press T to move to the next character and repeat step 1 for the next character of the password. 3. Repeat steps 1 and 2 until the correct password is displayed, then press protected setting or menu will now be accessible ! to verify.
To change the background, press # from the power-up screen, Highlight Background, press !, highlight Black or White, then $ to save. Press $ exit and save for power-up or % to apply the changes (without saving for power-up) and exit. TABLE 3-3. DISPLAY (OPERATOR CONVENIENCE) MENU FUNCTIONS SETTING CHOICES (BOLD = Factory Default) FUNCTION NOTE: To save any of the functions listed below for power-up it is necessary to first change SAVE DISPLAY CHG at the password setup (see PAR. 3.2.4.
3.3 LOCAL MODE OPERATION Local operation of the BOP power supply can be accomplished from the front panel via the 27 key keypad, and the ADJUST knob. All indications are provided by the 4-inch graphical display (LCD). 3.3.1 SETTING LOCAL MODE When the power supply is turned on, it is automatically set to Local mode. If the unit is in REMOTE mode and the display shows F1-LOCAL, pressing ! sets the unit to LOCAL mode. 3.3.1.
2. Verify that the load has been configured properly to ensure that the unit behaves as expected when the output is off (see PAR. 3.3.6 for details). 3. Press MODE key to select the main channel (VOLTAGE or CURRENT); the associated PROTECT channel is automatically selected and displayed. 4. Set the output on or off as desired using the STANDBY key. The output is off (disabled) when the STANDBY indicator is lit, on (enabled) when not lit. 5. Use Y or U to highlight the main channel.
TABLE 3-4. VOLTAGE AND CURRENT PARAMETER DEFINITIONS Term Definition To modify refer to PAR. Local Remote +EOnom –EOnom The nominal (rated) output voltage of the unit determined by model; e.g. for a BOP 36-28MG, ±EOnom is 36V. N/A N/A +IOnom –IOnom The nominal (rated) output current of the unit determined by model; e.g. for a BOP 36-28MG, ±IOnom is 28A. N/A N/A +Voltage –Voltage Voltage mode only. Positive (+) and negative (–) output voltage values established by keypad or remote command.
Press % from the power-up screen to enter the General Setup menu (Figure 3-6), then highlight Max/Min Settings. Press ! to enter the Max/Min Settings submenu (Figure 3-7). (If a Password is required, see PAR. 3.2.4.4 for instructions.) Highlight Protect Entry and press ! to change it. Highlight Bipolar or Independent, then $ to save, or % to abort. When complete, press $ to save for power-up, or # to abort, or % to apply the changes (without saving for power-up) and exit. VOLTAGE 0.0000 FIGURE 3-6.
tion values (+25, –7) will remain in place until a new value is entered in the Voltage Protection field. When a new Voltage Protect setting, e.g., 22V, is entered with BIPOLAR mode selected, +Voltage Protect is set to +22V and -Voltage Protect to –22V. NOTE: The use of remote programming (via RS 232 or GPIB) automatically asserts Independent protection limits. Once the unit is returned to local mode, the unit is automatically returned to BIPOLAR mode. 3.3.3.
TABLE 3-5. MAX/MIN SETTINGS MENU SETTING Protect Entry CHOICES (BOLD = Factory Default) BIPOLAR INDEPENDENT FUNCTION BIPOLAR - Causes a single protection limit value (one for voltage, one for current) to apply to both ± limits. Only one value is displayed and edited from the front panel. (see PAR. 3.3.3.1.) INDEPENDENT - Allows + and – protection limits to be set independently. from the front panel (see PAR. 3.3.3.1 for considerations when using remote mode).
capable of delivering ±28A in current mode can be configured to allow current to be adjusted from –0.5A to +10A by setting –Current Min to –0.5 and +Voltage Max to +10. Adjustment range is between 0 and EOnom for voltage and 0 and IOnom for current. Note that these software limits are not the same as the Protect Limits described in PAR. 3.3.4.2 . The main channel software limit values can be lowered (closer to zero) by the user, e.g., to prevent inadvertent damage to a specific circuit under test.
range is between a minimum (box) value (see Figure 1-2) and 1% above the nominal (rated) value. CAUTION: WHEN WORKING WITH ACTIVE LOADS, ALWAYS ADJUST THE BOP PROTECTION LIMITS TO BE ABOVE THE MAXIMUM VALUES OF VOLTAGE OR CURRENT EXPECTED FROM THE LOAD. FOR EXAMPLE, WHEN THE BOP IS OPERATING IN VOLTAGE MODE SINKING ENERGY FROM A CONSTANT CURRENT TYPE LOAD, SET THE CURRENT PROTECTION LIMITS OF THE BOP ABOVE THE MAXIMUM CURRENT EXPECTED FROM THE LOAD. 1.
WARNING For inductive loads, and especially superconducting magnet type loads, the inherent offset of the BOP in the OFF state may generate significant current in the circuit. A properly rated switch in parallel with a resistor must be connected between the power supply and the load. The switch must be open and the BOP front panel LCD must read 0V, 0A before removing or installing connections between BOP and load. ACTIVE.
BATTERY. This mode is necessary for the power supply to function properly and safely with either battery or constant-voltage-type active electronic loads. This mode prevents the battery from discharging during the OFF state. When the output is disabled (set to OFF), the BOP will go to current mode, current will be set to zero, with voltage protect and current limit set to maximum. In this way the battery will not be discharged while the output is OFF.
word is required, see PAR. 3.2.4.4 for instructions.) Highlight the parameter and press ! to modify. Use Y, U or the ADJUST control to highlight a selection, then press $ to save. To change a value use the number keys to enter new setting, then $ to save. When all power-up settings have been configured, press $ to save for power up or % to exit and abort the change. To restore the factory default power-up settings listed above, from the power-up screen press %. Highlight Power-up Settings and press !.
3.3.8.1 UNDERSTANDING ABBREVIATIONS USED FOR SAVED SETTINGS The parameters listed in Table 3-8 are displayed, followed by a listing of the first 20 memory locations, displayed in two rows of ten. Use T and R keys to display additional columns or navigate to the desired location. Locations that are not empty show an abbreviated representation of the saved settings.
3.3.8.2 VIEWING SAVED SETTINGS 1. Pressing ! from the power-up screen displays the Saved Setups screen (Figure 3-8) consisting of a list of locations 1 through 20 arranged in two columns of 10 rows. Use T and R keys to display additional columns. NOTE: Use the number keys as a shortcut, e.g., pressing 4 immediately highlights location 41, showing the column with locations 41 through 50. 2. Use the U and Y keys to highlight the desired memory location; When the desired location is highlighted, press !.
NOTE: If a value to be saved is beyond the range of the unit, the value saved will be limited to the maximum value. If the Mode is changed, the numerical values for the main and protection channels must be revised accordingly. • To modify the parameter, press !. Highlight the desired choice from a list, or use the keypad to enter a numeric value, then press $ to save, or % to abort. • To exit without changing the parameter, press %. 5. Continue to modify parameters as described in step 4 above.
3.3.9.2 WAVEFORM OVERVIEW After observing the precautions of PAR. 3.3.9.1, the Saved Waveforms screen (Figure 3-9) is entered by pressing @ from the power-up screen (Figure 3-3). Waveforms that have been previously saved will be displayed with the previously assigned names; waveforms that have been erased will appear as Empty. Up to 16 separate local waveforms can be programmed and stored from the front panel.
Note that a single segment between 0.01Hz and 1.8Hz uses all available points, so subsequent segments will not be accepted. Four segments of 2.81Hz will be acceptable, while five segments at 2.81 Hz will not be accepted. Reducing the segment by using the start and stop angle will also reduce the number of points used. Each time a segment is added, the waveform is validated.
TABLE 3-10. SQUARE WAVEFORM FREQUENCY VS. POINTS Frequency (See Note 1) Total Points From To 16.31Hz 21.7Hz 21.71Hz 27.1Hz 27.11Hz 55.5Hz Frequency (See Notes 1) Total Points From To 320 217.6Hz 261.0Hz 24 240 261.1Hz 435.0Hz 20 32.6Hz 192 435Hz 652.5Hz 12 66.5Hz 160 653 1000 10 NOTE: 1. As the frequency varies within the range, the time interval per point varies proportionately. 3.3.9.5 VIEWING STORED WAVEFORMS After observing the precautions of PAR. 3.3.9.
To stop execution, press (STANDBY indicator on). %. This stops waveform execution and puts the unit into standby While the waveform is executing, the display shows a graphic of the programmed waveform (repeating segments only) below the message Waveform Executing. WARNING Be sure that output power is OFF (Standby indicator lit) while connecting monitoring device. Be sure that connections are secure and that terminals are not inadvertently shorted.
TABLE 3-11. WAVEFORM SEGMENT DETAILS MENU SETTING Offset CHOICES FUNCTION xxx.xxx DC level on which the waveform (centered) will ride or Amplitude for Level segments. (Volts or Amperes) Volts or Amperes determined by mode selected for waveform. E.g. for BOP 10010MG, to specify a positive ramp that goes from +30V to +80V, set amplitude to +50V and offset to +55V. Since p-p amplitude of segment is centered on offset, it is possible for the waveform to exceed the model ratings (e.g.
2. Assign a name to the waveform: highlight Name, press ! to modify, change the name using the Y or U keys or ADJUST or the multiple presses of the numeric keys (see PAR. 3.2.4.2 for details). Press $ to save or % to abort.the change and exit. TABLE 3-12. NEW WAVEFORM SETTINGS MENU SETTING CHOICES FUNCTION Name Alphanumeric characters (10 characters max.) (Name Assigned by User) Waveforms are assigned a number from 1 to 16.
FIGURE 3-11. SAMPLE WAVEFORM 1. After observing the precautions of PAR. 3.3.9.1, press @ from the power-up screen to enter the Saved Waveforms screen (Figure 3-9), highlight a waveform designated Empty and press @ to create a new waveform. 2. The initial waveform settings are displayed (see Table 3-11 and Table 3-12 for parameter details. Use ! to modify the initial settings for the waveform. For each parameter, use $ to save the setting.
When complete, press $ to save for power-up. This step changes the 2ms, 0V level to be executed only once at the beginning of the waveform. 4. From the Waveform Settings screen, highlight segment LEVEL 0.002s 0.00 I and press @ to insert a new segment. Use ! to modify the following settings of the new segment. For each parameter, use $ to save the setting. Type Period (sec) Offset Level 0.001 1.5 When all settings are complete, press $ to save for power-up. This step creates a 1.
3.3.9.10 COPYING A WAVEFORM After observing the precautions of PAR. 3.3.9.1, press @ from the power-up screen to enter the Saved Waveforms screen (Figure 3-9). Highlight one of the stored waveforms, then press $. Then highlight a waveform location designated Empty and press $ to save or % to abort the change and exit. The copied waveform may then be modified and saved with a new name if desired (see PAR. 3.3.9.7). 3.3.
TABLE 3-13. ERROR MESSAGE EXPLANATIONS (CONTINUED) ERROR MESSAGE Series or Parallel when not STANDALONE EXPLANATION Mismatch between Unit type and Connection type. Automatically reverts to Unit type: Standalone, Connection Type: standalone. Calibration invalid - Multiple Unit Consult Factory. BITBUS option must be Disabled Change CIIL mode to SCPI. From power-up screen press mat, press , highlight SCPI, press , then press cycle BOP off, then on.
3.4.1.1 REMOTE SHUTDOWN A standalone unit can be shut down using a remote signal applied to the PROTECTION EXT. PORT as shown in Figure 3-12 or 3-13. A multiple unit configuration (parallel, series or seriesparallel) can be disabled by applying a remote signal to the master PAR/SER PROTECTION PORT as shown in Figure 3-12 or 3-14. When the signal is momentarily active (minimum 100 microseconds), power transfer between input and output is stopped (both input and output internal modules are shut off).
3.4.1.2 REMOTE STANDBY A standalone unit or a multiple unit configuration (parallel, series or series-parallel) can be set to STANDBY status by applying a remote signal to the TRIGGER PORT as shown in Figure 3-15. For multiple unit configurations this signal must be applied to the master. When the signal is momentarily active (short or logic 0 for a minimum of 100 microseconds), the output is set to OFF after a maximum delay of 200 milliseconds and the STANDBY indicator goes on.
TABLE 3-14. REVISIONS/TEST MENU SETTING CHOICES (BOLD = Factory Default) MAXIMUM OUTPUT VOLTAGE XX CURRENT YY (Cannot be highlighted) XX.0 YY.0 Displays rated output voltage and current of power supply. including all slaves connected in parallel or series. DISPLAY Status (see NOTE below) Automatic test, reports status messages (see NOTE below). KEYPAD Status (see NOTE below) Requires depressing keys indicated on LCD.
TABLE 3-15. ANALOG REMOTE SETUP MENU SETTING CHOICES (BOLD = Factory Default) REFERENCE INPUT PIN 11 (referenced to pin 4) INTERNAL EXTERNAL EXTL REF LVL INTERNAL: Any external reference applied to the Analog I/O port pin 11 is ignored and the output is controlled using either the local front panel keypad (see PAR. 3.3.2) or remote SCPI commands (see Appendix B). EXTERNAL: The external reference applied to Analog I/O port pin 11 is used to control the output (see PAR. 3.4.3.1).
voltage for a user-determined software limit) clipping of the output voltage or current to the limit will occur. NOTE: If the system limits have been modified (PAR. 3.3.4), the output of the power supply will never exceed the modified system limits. E.g, for a BOP 36-28MG, if the system voltage limit is modified to ±18V, applying a positive analog voltage to pin 11 that starts at zero and rises to +10V causes the output to rise from zero and reach +18V when the external reference reaches +5V.
3.4.4 EXTERNAL PROTECTION LIMITS When PROTECTION LIMIT on the Reference Menu is set to EXTERNAL, the protect limits are determined by four analog signals referenced to Ground (pin 12) which are applied to the Analog I/O Port (see PAR. 3.4.4). To be functional this feature must first be configured from the front panel. From the power-up screen press $, and highlight Protection Limit. Press ! to modify, then highlight External and press $ to save.
exit. NOTE: Each time Protection Limit setting is changed, the unit generates an internal *RST reset command (see PAR. A.11) requiring the BOP output to be reprogrammed. 3.4.5 MONITORING OUTPUT CURRENT USING AN ANALOG SIGNAL The BOP provides an output analog signal, 0 to ±10V, that is proportional to the output current which is always available. For the master of a parallel or series configuration this signal is proportional to the output current of the parallel or series combination.
mode will be, so the unit is never uncontrolled, response is quick and no transients are possible. Recommended programming techniques are: 1. Minimize programmed mode (voltage or current) changes. Unless absolutely required by the test parameters, allow the power supply to automatically switch modes as determined by the load. This will improve response time and reduce undesirable transients. 2.
#include #include #include #include /*Overhead for the use of a NATIONAL INSTRUMENTS gpib interface */ int unit_desc; // handle for the national instruments controller int GPIbus=0; // GPIB card 0 int adr=6; // Power Supply address char status_byte; // status byte from the power supply #define MAV 0x10 /* bit 4 of the status byte is the Message AVailable bit by 488.
3.5.3.1 GPIB PORT SETUP The following paragraphs describe the how to configure the GPIB port. 3.5.3.1.1 CHANGING THE GPIB ADDRESS The default address is 6. To change the GPIB address press % from the power-up screen, then press ! to enter the Interface menu (see Table 3-16) Highlight GPIB Address and press !, then use the number keys to enter the desired address and press $ to save. Press $ to save for power-up or % to apply the changes (without saving for power-up) and exit. TABLE 3-16.
3.5.3.1.3 DETERMINING WHETHER *RST COMMAND SETS THE OUTPUT OFF OR ON The user can control whether the *RST command (see PAR. A.11) sets the output on or off. Table 3-17 describes how the unit operates depending on how *RST set Output is configured, and the load type selected. From the power-up screen press %, and note whether “*RST set Output” setting is as desired. To modify highlight Interface Settings (see Table 3-16) and press !, then highlight On or Off and press ! to save.
then press % to apply the changes (without saving for power-up) and exit, or press $ to save for power-up (see PAR. 3.5.6.2.3 for a description of prompt mode). Enable - Enables Serial Prompt (see PAR. 3.5.6.2.3 for a description of prompt mode). Disable - Disables Prompt. If both Serial XON/XOFF and Prompt functions are disabled, Echo mode is the default (see PAR. 3.5.6.2.2 for a description of Xon/Xoff mode). Enab+echo - Enables Serial Prompt (see PAR. 3.5.6.2.3) and Echo (see PAR. 3.5.6.2.2) modes.
TABLE 3-18. IEEE 488 (GPIB) BUS INTERFACE FUNCTIONS (CONTINUED) FUNCTION SUBSET SYMBOL COMMENTS Device Clear DC1 Complete Capability. BOP accepts DCL (Device Clear) and SDC (Selected Device Clear). Device Trigger DT1 Respond to *TRG and trigger functions. Controller C0 No Capability TABLE 3-19.
3.5.5 BOP VISA INSTRUMENT DRIVER The VISA instrument driver for the BOP power supply, available for download at www.kepcopower.com/drivers.htm, simplifies programming with a VISA compatible GPIB controller. Included are: • source code (C) for all VISA functions (kp_bophi.c) • a complete programming reference manual (kp_bophi.
3.5.6.2 RS 232 IMPLEMENTATION The following paragraphs are provided to help the user understand how the RS 232 serial interface is implemented in the BOP. Since the RS 232 protocol does not use a parity bit, The XON/XOFF method of communication is selected as the default to ensure “handshake” control of serial communication.
by the command originator. When the line is parsed and the commands are sent to the analog processor, the BOP sends the line terminator sequence CR LF to the command originator. The ESC character is used for synchronization, causing the BOP to reset its input buffer and return a CR LF sequence. The XON character enables the transmitter if XON/XOFF flow control is enabled (see PAR. 3.5.3.2.2 and Table 3-16). The XOFF character stops data transmission if XON/XOFF flow control is enabled (see PAR. 3.5.3.2.
3.5.6.2.3 PROMPT METHOD The command originator sends a message line (command) to the BOP and waits until the prompt sequence CR LF > (3EH, 6210) is received. The BOP sends the prompt sequence CR LF > to the command originator indicating the power supply is ready to receive the next command and data will not be lost. This method is useful in an interactive mode as well as with certain process controllers. 3.5.6.3 USING SCPI COMMANDS FOR RS 232 COMMUNICATION.
mation (GPIB address) must be included before the command sequence. (See PAR.3.5.3.1.1 to establish the BOP Power Supply GPIB address.) 3.6.1 SCPI MESSAGES There are two kinds of SCPI messages: program messages from controller to power supply, and response messages from the power supply to the controller. Program messages consist of one or more properly formatted commands/queries and instruct the power supply to perform an action; the controller may send a program message at any time.
The LIST subsystem includes a subsystem for waveform generation. The waveform generation is invoked with the verb APPLY. When APPLY is added to a list:volt or list:curr command, the BOP adds a series of points to the list arrays. The BOP can apply these points to approximate a SINE, Triangle, RAMP (positive or negative) or square waveform or a level. The basic command requires a type, frequency (or period for a level), a peak-to-peak amplitude (or amplitude for a level).
• Variable area - around 3000 updates can be completed prior to an automatic PACK occurring. Variable areas also include serial number updates and password updates. • Calibration - 64 calibrations can be saved before a PACK is required.
ROOT : (colon) [SOURce:] subsystem [SOURce:] VOLTage [:LEVel] [:IMMediate] [:AMPLitude] val [:AMPLitude]? MIN, MAX :TRIGgered [:AMPLitude] val [:AMPLitude]? MIN, MAX :LIMit[:BOTH] " ? :NEGative " :NEGative? :POSitive " :POSitive? :MODE FIXed, LIST, TRANsient, EXTernal, EXTReflevel, PROTect :MODE? :PROTect [:BOTH] [:BOTH]? :NEGative :NEGative? :POSitive :POSitive? :LIM[:BOTH] " :LIM[:BOTH]? :LIM:NEGative " :LIM:NEGative? :LIM:POSitive " :LIM:POSitive? [SOURce:] CURRent [:LEVel] [:IMMediate] [:AMPLitude] val
3.6.3.11 CALIBRATE SUBSYSTEM The BOP series of power supplies support software calibration. A full calibration consist of a voltage calibration and a current calibration. These calibration procedures include steps that prepare the unit for series or parallel operation. Both voltage and current calibrations consist of a zero (performed on the main channels only) and positive and negative full scale calibrations with both internal and external references.
3.6.4 PROGRAM MESSAGE STRUCTURE SCPI program messages (commands from controller to power supply) consist of one or more message units ending in a message terminator. The message terminator is not part of the syntax; it is defined by the way your programming language indicates the end of a line (“newline” character). Sending a character with EOL line asserted is another way of sending a message terminator.
3.6.4.3 QUERY INDICATOR The question mark (?) following a keyword is a query indicator. This changes the command into a query. If there is more than one keyword in the command, the query indicator follows the last keyword. (e.g., VOLT? and MEAS:CURR?). 3.6.4.4 DATA Some commands require data to accompany the keyword either in the form of a numeric value or character string. Data always follows the last keyword of a command or query (e.g., VOLT:LEV:TRIG 14 or SOUR:VOLT? MAX 3.6.4.
:CURR:LEV:IMM 4 The first colon is the root specifier, the other two are keyword separators. VOLT:LEV 6;:CURR:LEV 15 The second colon is the root specifier, the first and third are keyword separators :INIT ON;:TRIG;:MEAS:CURR?;VOLT? The first three colons are root specifiers. 3.6.4.8 MESSAGE TERMINATOR The message terminator defines the end of a message.
3.6.6 PROGRAM MESSAGE SYNTAX SUMMARY • Common commands begin with an asterisk (*). • Queries end with a question mark (?). • Program messages consist of a root keyword and, in some cases, one or more message units separated by a colon (:) followed by a message terminator. Several message units of a program message may be separated by a semicolon (;) without repeating the root keyword.
FIGURE 3-20. STATUS REPORTING STRUCTURE A zero to one transition of a condition register is added to the event register if the specific bit in the enable register is also a 1. Reading an event register clears all of the bits found in the event register. If any bits are set in an event register, the following condition register bit is then set. For example, if the STAT:QUES:ENB (enable) register has bit 0 set and a voltage error is detected, the event registers bit 0 is set.
3.6.7.2 OPERATIONAL STATUS REGISTER The OPERational condition register contains conditions which are a part of the instrument’s normal operation. The definition of each of these bits (condition register) is as follows: 3.6.7.3 • 1 through 7 - Not Used — always zero. • 8 - Constant Voltage — 1 indicates the instrument is in constant voltage mode. • 9 - Not Used — always zero. • 10 - Constant Current — 1 indicates the instrument is in constant current mode.
/**************************************************************************/ /* Sample Program For KEPCO power supply, using National Instruments */ /* GPIB interface card and IBM PC or compatible computer */ /**************************************************************************/ #include #include "decl.
SECTION 4 - CALIBRATION 4.1 GENERAL This section contains the calibration instructions for the Power Supply. It is recommended that the user be familiar with Local Mode operation (PAR.3.2) before calibrating the unit. A full calibration consist of a voltage calibration and a current calibration. Both voltage and current calibrations consist of zero, max and min, and protection limit calibration.
TABLE 4-1. CALIBRATION SUMMARY (CONTINUED) Type Step Reference Type and Value Monitored Parameter Output Conditions Notes Remote Calibr. VOLTAGE EXTERNAL PROTECTION, Pos. Voltage Neg. Voltage (together) 1. ZERO 2. POSITIVE External: 1. 0.0V 2. +10.0V (Analog I/O Port pin 14+6 ref to pin12) N/A No requirements 1. Automatic internal measurement 2. Remote Calibration only. CURRENT, INTERNAL 1. ZERO 2. POSITIVE 3. )NEGATIVE Internal Output Current: 1. 0.0A 2. +Current FS 3.
TABLE 4-1. CALIBRATION SUMMARY (CONTINUED) Type Step Local Calib. EXTERNAL PROTECTION, Pos. Voltage Neg. Voltage Pos. Current Neg. Current (together) 4.2 1. ZERO 2. POSITIVE Reference Type and Value External: 1. 0.0V 2. +10.0V (Analog I/O Port pins 14, 6, 13, 5 ref to pin12) Monitored Parameter N/A Output Conditions No requirements Notes 1. Automatic internal measurement 2. Local Calibration only.
TABLE 4-3. VOLTAGE CALIBRATION MEASUREMENTS AND TOLERANCES 4.3 MODEL VOLTAGE ZERO ±FULL SCALE VOLTAGE ±FULL SCALE VPR LIMIT BOP 10-75MG 0V ±0.0001V 10V (MAX) -10V (MIN) ±0.001V 10V (MAX) -10V (MIN) ±0.003V BOP 20-50MG 0V ±0.0002V 20V (MAX) -20V (MIN) ±0.002V 20V (MAX) -20V (MIN) ±0.006V BOP 36-28MG 0V ±0.0036V 36V (MAX) -36V (MIN) ±0.0036V 36V (MAX) -36V (MIN) ±0.01V BOP 50-20MG 0V ±0.005V 50V (MAX) -50V (MIN) ±0.005V 50V (MAX) -50V (MIN) ±0.015V BOP 72-14MG 0V ±0.
TABLE 4-4. CURRENT CALIBRATION MEASUREMENTS AND TOLERANCES MODEL SENSE RESISTOR VALUE (SEE NOTE AND TABLE 4-2) CURRENT ZERO ±FULL SCALE CURRENT ±FULL SCALE CPR LIMIT BOP 10-75MG 0.001 Ohm 0V ±0.008mV 0.075V (MAX) –0.075V (MIN) ±0.008mV 0.075V (MAX) –0.075V (MIN) ±0.038mV BOP 20-50MG 0.001 Ohm 0V ±0.005mV 0.05V (MAX) –0.05V (MIN) ±0.005mV 0.05V (MAX) –0.05V (MIN) ±0.025mV BOP 36-28MG 0.001 Ohm 0V ±0.003mV 0.028V (MAX) –0.028V (MIN) ±0.003mV 0.028V (MAX) –0.028V (MIN) ±0.
2. For FULL SCALE calibration adjust the output to obtain the closest value above the nominal full scale value. 3. Set the unit for local sensing with GND Network in (see Figure 4-1) and disconnect load from BOP output to prepare the unit for voltage calibration. FIGURE 4-1. CALIBRATION SETUP 1. Initiate calibration by sending the SCPI command SYSTem:PASSword:CENable DEFAULT and then send CAL:STATe 1. The password DEFAULT has been set at the factory.
7. Connect a 0V ±0.1mV d-c reference to pin 11 (EXT_REF) referenced to pin 4 (SGND) of the Analog I/O Port connector (A2A5J6). Set the BOP to zero volts output by sending CAL:VEXT ZERO. Connect the DVM to the BOP output and send CAL:DATA commands as needed (see PAR. 4.3c) to adjust the BOP output until the DVM reads as close to zero as possible within tolerance specified in Table 4-3 for VOLTAGE ZERO. NOTE: Accuracy of the 10V d-c reference must be ±0.
NOTE: Accuracy of the 10V d-c reference must be ±0.1mV in order for the calibrated unit to meet published specifications. 15.Connect a –10V ±0.1mV d-c reference to pin 8 (S_IN_SERIAL) of the PAR/SER CONTROL IN connector (A2A5J3) referenced to COM S terminal at the rear panel. Set the BOP to maximum positive output voltage by sending CAL:SER MAX. Measure the voltage output using the DVM. Send CAL:DATA commands as needed (see PAR. 4.3a) until the DVM reading is as close as possible to +10V. 16.
18.Set the BOP to maximum positive output current by sending CAL:CURR MAX. Measure the current by reading the voltage across the sense resistor. To adjust, send CAL:DATA commands as needed (see PAR. 4.3b) to adjust the BOP output until the DVM reads as close as possible above the nominal full scale value within tolerance specified in Table 4-4 for +FULL SCALE CURRENT. 19.Set the BOP to maximum negative output current by sending CAL:CURR MIN.
connector (A2A5J6). Then send the CAL:ZERO command. This enables the BOP to recognize that the voltage at the ILIM_EXTERNAL pins is 0V. 27.Connect +10.0V ±0.1mV d-c reference voltage from the external voltage source to ILIM+_EXTERNAL and ILIM-_EXTERNAL, pins 5 and 13, referenced to pin 12 (GND1) of the BOP analog I/O connector (A2A5J6). Then send CAL:CLIM MAX, then CAL:ZERO commands. This enables the BOP to recognize that the voltage at the ILIM+_EXTERNAL pin is 10.0V. 28.
1. From the power-up screen, press bration and press !. % to enter the General Setup menu, then highlight Cali- 2. Enter the password (see PAR. 3.2.4.4), and press !, The LCD shows main calibration screen (Figure 4-3) which includes explanations for the following function keys: • ! - VOLTAGE - Selects the voltage calibration of the BOP. • @ - CURRENT - Starts the calibration for the BOP in current mode.
• % or ENTER - EXIT - Exit Voltage or Current Calibration 4. Pressing !, @, #, or $ displays following explanations for the function keys: CAUTION: IF THE CALIBRATE ZERO ! FUNCTION IS AVAILABLE, PERFORM THIS FUNCTION FIRST, AS IT AFFECTS ALL OTHER OUTPUT CALIBRATIONS. • ! - Calibrate the Zero adjustment for this operational mode. IF THIS FUNCTION IS AVAILABLE, PERFORM THIS FUNCTION FIRST, AS IT AFFECTS ALL OTHER OUTPUT calibrations. • @ - Adjust the MAXIMUM (Positive) for this operational mode.
1. From the power-up screen, press ! to enter the General Setup menu, then highlight Calibration and press !. Enter the password (see PAR. 3.2.4.4), and press !, The LCD shows main calibration screen. 2. Press ! - VOLTAGE, ! - INTERNAL, @ - ZERO to set the BOP to zero volts output. Connect a Digital Voltmeter (DVM) to the BOP OUT S and COM S terminals to measure the output voltage.
12.Connect +10.0V ±0.1mV d-c reference voltage from the external voltage source to EXT_REF, pin 11, referenced to pin 4 (SGND) of Analog I/O Port connector (A2A5J6), Press @ - GAIN, @ - POSITIVE. Adjust as needed until the DVM reads as close to zero as possible within the limits specified in Table 4-3 for VOLTAGE ZERO. Press % twice. 13.Press # - EXTERNAL, @ - POSITIVE.
21.Press # - NEGATIVE to adjust the minimum (maximum negative) current protection limit of the power supply. Adjust as needed until the DVM reads as close as possible above the nominal full scale value within tolerance specified in Table 4-4 for –FULL SCALE CPR LIMIT. Press % twice. 22.Connect a +0V ±0.1mV d-c reference voltage to external reference, A2A5J6 pin 11, referenced to pin 12 (GND1) of the BOP analog I/O port. 23.
4.4.3 CALIBRATION USING VISA DRIVER SOFT PANEL Refer to help text included with VISA Driver. Calibration of series-connected or parallel-connected configurations is not supported by the demonstration program supplied with the VISA Driver soft panel, stand-alone calibrations may be performed using the VISA driver soft panel. 4.5 CALIBRATION STORAGE The BIOPO maintains the calibration tables in Flash Memory until a PACK is executed.
APPENDIX A - SCPI COMMON COMMAND/QUERY DEFINITIONS A.1 INTRODUCTION This appendix defines the SCPI common commands and queries used with the BOP power supply. Common commands and queries are preceded by an asterisk (*) and are defined and explained in paragraphs A.2 through A.18, arranged in alphabetical order. Table A-1 provides a quick reference of all SCPI common commands and queries used in the Interface Card. TABLE A-1. IEEE 488.2 COMMAND/QUERY INDEX A.2 COMMAND PAR. COMMAND PAR. *CLS A.
A.4 *ESE? — STANDARD EVENT STATUS ENABLE QUERY Syntax: *ESE? *ESE? Return value: Integer> value per Table A-2. Description: Returns the mask stored in the Standard Event Status Enable Register. Contents of Standard Event Status Enable register (*ESE) determine which bits of Standard Event Status register (*ESR) are enabled, allowing them to be summarized in the Status Byte register (*STB).
A.8 *OPC? — OPERATION COMPLETE QUERY Syntax: *OPC? *OPC? Return value: <1> (ASCII) placed in output queue when power supply has completed operation. Description: Indicates when pending operations have been completed.When all pending operations are complete (all previous commands have been executed and changes in output level have been completed) a “1” is placed in the Output Queue. Subsequent commands are inhibited until the pending operations are completed.
A.9 *OPT? *OPT? — OPTIONS QUERY Syntax: *OPT? Returns string determined by power supply model. Description: Causes the power supply to return an ASCII string which defines the functionality of the power supply. The functionality is defined as follows: STRING DATA MEANING CAL Support for CALibrate is present. RL1 Commands sent over GPIB cause unit to enter remote mode. MEM Indicates the number of memory steps supported. LST Indicates the number of LIST steps supported. A.
*SRE A.13 *SRE — SERVICE REQUEST ENABLE COMMAND Syntax: *SRE grammed. where = value from 0 - 255 per Table A-3, except bit 6 cannot be pro- Description: Sets the condition of the Service Request Enable register. The Service Request Enable register determines which events of the Status Byte Register are summed into the MSS (Master Status Summary) and RQS (Request for Service) bits. RQS is the service request bit that is cleared by a serial poll, while MSS is not cleared when read.
*TST? A.17 *TST? — SELF TEST QUERY Syntax: Description: *TST? Returned value: 0 or 1 (0 = pass test, 1 = fail test) Power Supply test.This query causes the power supply to do a self test and provide the controller with pass/fail results. A 0 is returned if the unit passes the test. If the unit fails, a number from 1 through 1023 is returned to indicate the cause of the error. The test executes each of the subtests even when any one fails.
APPENDIX B - SCPI COMMAND/QUERY DEFINITIONS B.1 INTRODUCTION This appendix defines the SCPI subsystem commands and queries used with the BOP power supply. Subsystem commands are defined in PAR. B.3 through B.120, arranged in groups as they appear in the tree diagram, Figure 3-18. Table B-1 provides a quick reference of all SCPI subsystem commands and queries used in the BOP. TABLE B-1. SCPI SUBSYSTEM COMMAND/QUERY INDEX COMMAND PAR. COMMAND PAR. ABOR B.3 [SOUR:]CURR:PROT:MODE, ? B.53, B.54 CAL B.
TABLE B-1. SCPI SUBSYSTEM COMMAND/QUERY INDEX (CONTINUED) COMMAND PAR. COMMAND PAR. SYST:PASS:CDIS B.110 SYST:SEC B.115 SYST:PASS:NEW B.111 SYST:SET, ? B.116, B.117 SYST:PASS:STAT B.112 SYST:VERS? B.118 SYST:REM, ? B.113, B.114 TRIG:SOUR, ? B.119 NOTE: Commands listed above that are followed by “, ?“ have a related query. B.2 NUMERICAL VALUES The SCPI data parser on the BOP supports a maximum of 8 digits after the decimal point and a maximum integer of 4 x 108.
B.5 INIT[:IMM] INITiate[:IMMediate] COMMAND Syntax: Short Form: INIT:[IMM] Long Form: INITiate[:IMMediate] Description: Enables a single trigger. This command enables a single trigger. A *TRG command completes the sequence. Upon receipt of the *TRG command, the power supply will return to the commanded values of voltage and current established by the VOLT:TRIG and CURR:TRIG commands.
NOTES: 1. The power supply is assumed to be operating in constant voltage mode. 2 Examples below are intended only to illustrate command functions. Refer to PAR. 3.5.2 for programming techniques to optimize performance. OUTP ON VOLT 21; CURR 1.5 INIT:CONT ON INIT:CONT? VOLT:TRIG 15;CURR:TRIG 3 *TRG VOLT 21; CURR 5E-2 MEAS:VOLT? MEAS:CURR? FUNC:MODE CURR VOLT 21; CURR 1.1 CURR? FUNC:MODE VOLT CURR:TRIG? VOLT:TRIG? *TRG INIT:CONT 0 INIT:CONT? VOLT 0 MEAS:VOLT? VOLT? CURR? MEAS:CURR? Turns the output on.
OUTP? B.13 OUTPut[:STATe] QUERY Syntax: Short Form: OUTP[:STAT]? Return Value: (0 or 1) Long Form: OUTPut[:STATe]? Description: Indicates whether power supply output is enabled or disabled. Returns 0 if output disabled, returns 1 if output enabled. Related Commands: OUTP. OUTP:MODE B.
LIST:COUN B.21 [SOURce:]LIST:COUNt COMMAND Syntax: Short Form: LIST:COUN Long Form: LIST:COUNt> Description: Establishes how many times the list is executed. Allows user to establish how many times the list (established by LIST:GEN DSEQ or LIST:GEN SEQ and LIST:SEQ) is executed. The order (beginning to end or end to beginning) is determined by LIST:DIR.
B.
LIST:DWEL? B.30 [SOURce:]LIST:DWELl ? QUERY Syntax: Short Form: LIST:DWEL? Return Value: Long Form: LIST:DWELl? Description: Identifies the dwell times entered for the list. Starting at location established by LIST:QUERy, returns comma-separated list of up to 16 values indicating the dwell time parameters entered. i.e., the contents of LIST:DWEL locations of Table B-2. Related Commands: LIST: DWEL, LIST:QUERy. (See example, Figure B-2.) B.
B.32 [SOURce:]LIST:QUERy COMMAND Syntax: LIST:QUER Short Form: LIST:QUER Long Form: LIST:QUERy int_value = where n = first location to be queried. Description: Determines first location to be queried by LIST:VOLT?, LIST:CURR? or LIST:DWEL? queries. Related Commands: LIST:VOLT?, LIST:CURR?, LIST:DWEL?. LIST:QUER?. (See example, Figure B-2.) LIST:QUER? B.
LIST:RES? B.34 [SOURce:]LIST:RESolution? QUERY Syntax: Short Form: LIST:RES? Long Form: LIST:RESolution? Return Value: ,, (where and = clock period, = number of points to be used) Description: Identifies whether resolution is set to minimum (3840) or maximum (5900) and indicates the clock period. The resolution (3840 or 5900) determines the maximum number of points that will be used for the waveform.
LIST:VOLT:SWE? B.39 [SOURce:]LIST:VOLTage:SWEep? QUERY Syntax: Short Form: LIST:VOLT:SWE? Long Form: LIST:VOLTage:SWEep? Return Value: , (0.01 to 360) Description: Returns start and stop angle in degrees for either triangle and sine waveforms. LIST:VOLT:POIN? B.
NOTES: 1. This example assumes a BOP 36-28MG power supply is operating in constant current (CC) mode. 2 Examples below are intended only to illustrate command functions. Refer to PAR. 3.5.2 for programming techniques to optimize performance. CURR:LIM? CURR:LIMIT:POS 10;NEG 2 func:mode volt volt 15;curr 2 CURR 10 curr:prot? CURR:prot:neg 1 CURR:PROT:LIM:NEG 5 curr:prot? Returns 28,28 (positive and negative defaults for max current in current mode).
B.46 [SOURce:]CURRent[:LEVel]:LIMit::NEG? QUERY Syntax: CURR:LIM:NEG? Short Form: [SOUR:]CURR[:LEV]:LIM:NEG? Long Form: [SOURce:]CURRent[:LEVel]:LIMit:NEGative? Returns Description: Identifies the negative software limit value of output current that the unit can source (quadrant 3, Figure 1-2) or sink (quadrant 2). CURR:LIM:POS B.
CURR:PROT[:BOTH] B.51 [SOURce:]CURRent[:LEVel]:PROTect[:BOTH] COMMAND Syntax: Short Form: [SOUR:]CURR[:LEV]:PROT:BOTH Long Form: [SOURce:]CURRent[:LEVel]:PROTect:BOTH where is between minimum (box) value (Figure 1-2) and 1% above rated (nominal) output current. Description: Establishes both the positive and negative protection limits for current, the maximum current the unit is set up to source and sink; maximum is 1% greater than rated output current. B.
B.59 [SOURce:]CURRent[:LEVel]:PROTect:LIMit[:BOTH] COMMAND CURR:PROT:LIM[:BOTH] Syntax: Short Form: [SOUR:]CURR[:LEV]:PROT:LIM[:BOTH] Long Form: [SOURce:]CURRent[:LEVel]:PROTect:LIMit:[BOTH where is between minimum (box) value (Figure 1-2) and 1% above rated (nominal) output current. Description: Establishes the maximum value possible for both the positive and negative protection limits for current. Requires MEM:UPD (PAR. B.11) to save for power up. See PAR. 3.5.2.
CURR:TRIG B.65 [SOURce:]CURRent[:LEVel]:TRIGgered[:AMPlitude] COMMAND Syntax: Short Form: [SOUR:]CURR[:LEV]:TRIG[:AMP] Long Form: [SOURce:]CURRent[:LEVel]:TRIGgered[:AMPlitude] = digits with decimal point and Exponent, e.g., 2.71E1 for 27.1 Description: Programs current value to be transferred to output by *TRG (trigger) commands. This command can be used to reset many power supplies to preselected parameters by issuing a single *TRG command.
VOLT:LIM:NEG? B.72 [SOURce:]VOLTage[:LEVel]:LIMit:NEGative? QUERY Syntax: Short Form: [SOUR:]VOLT[:LEV]:LIM:NEG? Long Form: [SOURce:]VOLTage[:LEVel]:LIMit:NEGative? Description: Identifies the software limit value for negative output voltage specified by the user. VOLT:LIM:POS B.
B.78 [SOURce:]VOLTage[:LEVel]:PROTect[:BOTH]? QUERY Syntax: VOLT:PROT[:BOTH]? Short Form: [SOUR:]VOLT[:LEV]:PROT[:BOTH]? Long Form: [SOURce:]VOLTage[:LEVel]:PROTect[:BOTH]? Returns , Description: Identifies the protection limits for voltage (positive, negative); maximum is 1% greater than rated output voltage. B.
B.85 [SOURce:]VOLTage[:LEVel]:PROTect:LIMit:BOTH COMMAND VOLT:PROT:LIM[:BOTH] Syntax: Short Form: [SOUR:]VOLT[:LEV]:PROT:LIMit[:BOTH] Long Form: [SOURce:]VOLTage[:LEVel]:PROTect:LIM[:BOTH where is bewteen minimum (box) value (Figure 1-2) and 1% above rated (nominal) output voltage. Description: Establishes the maximum value possible for both the positive and negative protection limits for voltage. Requires MEM:UPD (PAR. B.11) to save for power up. See PAR. 3.5.2.
VOLT:TRIG B.91 [SOURce:]VOLTage[:LEVel]:TRIGgered[:AMPlitude] COMMAND Syntax: Short Form: [SOUR:]VOLT[:LEV]:TRIG[:AMP] Long Form: [SOURce:]VOLTage[:LEVel]:TRIGgered[:AMPlitude] = digits with decimal point and Exponent, e.g., 2.71E1 for 27.1 Description: Programs voltage value to be transferred to output by *TRG command. Actual output voltage will depend on load conditions.
STAT:PRES B.97 STATus:PRESet COMMAND Syntax: Short Form: STAT:PRES Long Form: STATus:PRESet Description: Disables reporting of all status events. This command sets all bits of the Operation Condition (Table B-3) and Questionable Condition Registers to 0, preventing all status events from being reported. (See example, Figure B-4.) STAT:QUES? B.
B.103 SYSTem:COMMunication:GPIB:ADDRess? QUERY Syntax: SYST:COMM:GPIB:ADDR? Short Form: SYST:COMM:GPIB:ADDR? Long Form: SYSTem:COMMunication:GPIB:ADDRess? Return Value: 0 to 30 Description: Identifies selected power supply GPIB address. SYST:ERR? B.104 SYSTem:ERRor? QUERY Syntax: Short Form: SYST:ERR? Return Value: Long Form: SYSTem:ERRor? Description: Posts error messages to the output queue.
SYST:PASS:STAT? B.112 SYSTem:PASSword:STATe? QUERY Syntax: Short Form: SYST:PASS:STAT? Return Value: 0 or 1 Long Form: SYSTem:PASSword:STATe? Description: Returns a 1 if the password state is enabled or a 0 if it is disabled. NOTES: 1. The power supply is assumed to be operating in constant voltage (CV) mode. 2 Examples below are intended only to illustrate command functions. Refer to PAR. 3.5.2 for programming techniques to optimize performance.
SYST:REM? B.114 SYSTem:REMote? QUERY Syntax: Short Form: SYST:REM? Return Value: {1 | 0} Long Form: SYSTem:REMote? Description: Identifies whether unit it in remote mode (1) or local mode (0) during serial (RS 232) communication. See PAR. 3.5.6.3 and Figure B-5. *IDN? outp? syst:rem? syst:rem 1 outp on outp? syst:rem 0 Unit responds with KEPCO,BOP 50-20,E1234,1.66 (typical). Unit responds with 0 indicating output is off Unit responds with 0 indicating unit is in local mode. Puts unit in remote mode.
SYST:VERS? B.118 SYSTem:VERSion? QUERY Syntax: Short Form: SYST:VERS? Long Form: SYSTem:VERSion? Return Value: . (YYYY.V) Description: Identifies SCPI Version implemented. Returns SCPI Version number: YYYY = year, V = Revision number for specified year. (See example, Figure B-6.) SYST:VERS? SYST:SET? SYST:PASS:NEW DEFAULT,OKAY SYST:SET LF1,RL1,DC1 Unit returns 1997 Unit returns DC0,LF0,RL0,OUT0 Unit changes password to be OKAY Configures Device Clear, Line Feed and Reset (see PAR.
TABLE B-5. ERROR MESSAGES (CONTINUED) ERROR MESSAGE 2yy01,"OVER TEMPERATURE” 2yy02,"CROWBAR ACTIVE" 2yy03,"DEVICE TURNED OFF" 2yy04,\"CURRENT FAULT" 2yy05,"POWER LOSS" 2yy06,"VOLTAGE FAULT" 2yy07,"RELAY OPEN", 2yy08,"POLARITY ERROR" 2yy09,"OVERLOAD" -100,“Command error” ESR ERROR BIT SET (SEE PAR. A.
KEPCO® THE POWER SUPPLIER™ BOP 1000W QUICK REFERENCE GUIDE Once the power supply is installed (see full Technical Manual), this guide is an aid that briefly outlines a simple approach to accomplishing common tasks, with the appropriate Technical Manual paragraph references for more details. All instructions start from the power-up screen (press % from most submenus to return to power-up screen). Many setup functions can be password protected - see UTILITY below for instructions.
CONTROLLING THE OUTPUT USING EXTERNAL (ANALOG) SIGNALS (REMOTE) How do I control the mode using an external signal? $, highlight External Mode, !, highlight Enable, $, then % to apply changes and exit. This setting is not saved for power-up (PAR. 3.4.2). Select mode by applying either logic 1 or open circuit for voltage, or logic 0 or short circuit for current, to pin 2 referenced to pin 9 of the Analog I/O port (PAR. 3.4.2).
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