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 3-20 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 2-3 CAUTION: When an external shut-down signal is sent to the unit, the shut-down condition is latched and the red FAULT indicator on the front panel is ON. To resume normal operation it is necessary to cycle power off, then on (preferred) or briefly press the RESET key on the front panel.
LIST OF WARNINGS AND CAUTIONS PAGE WARNING/CAUTION 3-12 CAUTION: When the ADJUST control is rotated, the active parameter is immediately effective if the output is enabled (on = STANDBY indicator not lit). The voltage/current applied to the load changes as the ADJUST control is rotated. 3-18 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.
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 3.2.5.4 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 ii PAGE How to Access the menus ....................................
TABLE OF CONTENTS SECTION PAGE 3.5 Digital Remote Mode Programming ........................................................................................................ 3-41 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 .................
TABLE OF CONTENTS SECTION 3.6.4.7 3.6.4.8 3.6.5 3.6.6 3.6.7 3.6.7.1 3.6.7.2 3.6.7.3 3.6.8 PAGE Root Specifier.............................................................................................................................. Message Terminator ................................................................................................................... Understanding The Command Structure ..........................................................................................
TABLE OF CONTENTS SECTION B.13 B.14 B.15 B.16 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 PAGE OUTPut[:STATe] Command................................................................................................................... OUTPut[:STATe] Query .............................
TABLE OF CONTENTS SECTION B.71 B.72 B.73 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 B.121 B.122 B.123 B.124 B.125 B.126 B.127 B.128 vi PAGE [SOURce:]LIST:SET:TRIGger? QUERY ...............................................................................................
TABLE OF CONTENTS SECTION B.129 B.130 B.131 B.132 B.133 B.134 B.135 B.136 B.137 B.138 B.139 B.140 B.141 B.142 B.143 B.144 B.145 B.146 PAGE SYSTem:COMMunication:SERial:PROMpt? Query............................................................................... SYSTem:ERRor? Query ........................................................................................................................ SYSTem:ERRor:CODE? Query....................................................................................
LIST OF FIGURES FIGURE TITLE PAGE 1-1 1-2 1-3 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 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 dc 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 RATING/DESCRIPTION INPUT CHARACTERISTICS a-c voltage nominal range Frequency Current 176 - 264 Va-c nominal 50-60 Hz range 47 - 63 Hz Single phase 176 Va-c 9.5A maximum 264 Va-c 6.4A maximum Power factor Source 0.99 minimum Sink 0.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION OUTPUT CHARACTERISTICS (Continued) Sustain Output update rate Readback 400 updates/sec measurement rate 5 ms measurement array 64 samples step change timing 40µsec (default) Voltage stabilization in voltage mode min-max input voltage load effect 0.1% of rating 0-100% load current 0.02 of rating 0.5 through 8 hours 0.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION PROGRAMMING/DISPLAY CHARACTERISTICS Analog I/O Port (See Table 2-10) Main channel (voltage or current) –10V to +10V Full range output, 20K Ohm input impedance (see PAR. 3.4) Protection Limit channels: (±Voltage, ±Current) +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 RATING/DESCRIPTION FUNCTION GENERATOR CHARACTERISTICS (Continued) Types of Basic waveforms Maximum number of points per basic waveform Sine (Sinusoidal waveform) Triangle (Triangular waveform) Pos. Ramp (Ramp waveform) Neg.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION FUNCTION GENERATOR CHARACTERISTICS (Continued) LIST command characteristics for "string" type Maximum number of points waveform (Remote only) • 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. Dwell time range: 93usec to 34msec.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION FUNCTION GENERATOR CHARACTERISTICS (Continued) Amplitude Range Main Channel Voltage (Volts p-p) 0 to 2 x EONOM Sine, Triangle, Square, ±Ramp Current (Amperes p-p) 0 to 2 x IONOM Sine, Triangle, Square, ±Ramp Protection Limit Channel .
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION SAVE/RECALL CHARACTERISTICS (See PAR. 3.3.8) Number of Locations 99 Parameters Saved or Recalled All parameters saved for power-up. Mode of operation Reference type Voltage, Current or External For External the operating mode is determined by signal at I/O Port; no signal selects voltage mode (see PAR. 3.4.2).
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION MISCELLANEOUS FEATURES (Continued) Power-up Settings Mode Voltage (default) or Current Main Channel Internal (default), External or External Reference Type Reference Level (Gain Mode) Protection Limit Channel Reference type Protection Limit Levels (Internal) Output status Password Types Internal (default), External or Lesser Limit EOMIN or IOMIN to 1.
TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued) SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION PHYSICAL CHARACTERISTICS Dimensions Weight, 1000W models English 5.25' X 19" X 21.5" HXWXD metric 133.3mm X 482.6mm X 546.1mm HXWXD English 53 lbs metric Connections Source power Load connections Sensing Output Terminal Block Nickel-plated copper bus bars 7-pin terminal block Default: 3 links installed for local sensing and ground network connected.
FIGURE 1-2.
FIGURE 1-2.
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.
1.6.3 WAVEFORMS The BOP models have the capability to make the output follow complex waveforms. These may be generated either externally, using an analog reference voltage (see PAR. 1.6.6), or internally, using user-generated waveforms. Up to 16 user-generated waveforms can be stored for later use. The user selects the operating mode, positive and negative protection levels, and a count (the number of times the waveform is to be repeated).
configuration triples the output voltage and doubles the output current. If a series/parallel configuration is enabled, communication between the master BOP and those configured as slave units occurs via the BITBUS. Refer to PAR. 2.8 for further details. 1.6.9 ENERGY RECUPERATION The BOP is a four-quadrant device as shown in Figure 1-3. Operating as a source, it delivers energy into a passive load, and as a sink it operates as an electronic load, absorbing and dissipating energy from an active load.
FIGURE 1-3.
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.
TABLE 1-5. ACCESSORIES (CONTINUED) ITEM Slides Heat Sink 1-18 FUNCTION PART NUMBER Allows easy withdrawal of unit from rack (see Figure 1-2). (Model CS 04 includes slides, brackets, all mounting hardware and installation instructions.) CS 04 Provides adequate cooling for calibration sense resistors.
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 1-2). 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 1-2). Allow a minimum of 7/8 in. (22.2 mm) above and below the unit to permit air intake necessary for proper cooling of the unit.
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.
2.5.6 LOAD CONNECTION USING LOCAL SENSING Figure 2-2 shows a typical configuration using local sensing and a grounded load; for local sensing with an isolated (“floating”) load, do not install the ground connection (see Figure. 2-2, Note 2). 2.5.7 LOAD CONNECTION USING REMOTE SENSING Figure 2-3 shows a typical configuration using remote sensing and a grounded load; for remote sensing with an isolated (“floating”) load, do not install the ground connection (see Figure. 2-3, Note 2). 2.
FIGURE 2-2. FIGURE 2-3.
2.7.3 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.
three series-connected units. These figures allow other configurations, e.g., five parallel-connected units or two series connected units, etc. to be easily deduced Figure 2-12 show the connections for a typical 3 X 2 (two parallel branches each consisting of three series-connected units) configuration, as well as simplified diagrams showing required arrangements for 2 X 2 and 3 X 2 configurations to allow the user.
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).
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. Select Series, Parallel, Master 2X2 or Master 3X2, press $ to apply the change. c.
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.
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.
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 0.0000 FIGURE 3-3. POWER-UP SCREEN SHOWING GRAPHIC METERS 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. 3.2.5.4. 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.137). 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.
3.2.5.4 DISPLAYING METERS OR GRAPH (TIME LINE) The top screen can be configured to either display graphical analog meters (Figure 3-3) showing a coarse representation of voltage and current in addition to the digital readout, or a graphical time line (Figure 3-4). The graphical time line is not an oscilloscope type display. Instead, it samples the output and refreshes the screen at a specified interval: 75, 30, 15, 7.5, 3.8, 1.5, 0.8, 0.3, 0.15, 0.08 or 0.04 seconds.
3.3.3 PROGRAMMING VOLTAGE OR CURRENT AND ASSOCIATED PROTECT LIMITS From the power-up screen the settable voltage/current parameters are displayed at the bottom of the LCD above the HELP message (see Figure 3-3). Use Y or U to highlight the main or protect channel. (For BOP protect limits refer to PAR. 3.3.4.2 and for external limits see PAR. 3.3.4.3.) 1.
3.3.3.1 SELECTING BIPOLAR/INDEPENDENT PROTECTION LIMITS The BOP can be configured to show the protection limits as either a single value that applies to both protection channels or show individual settings for positive and negative protection limits. Selecting Independent protection limits means that the positive and negative limits are displayed (and can be modified) independently.
TABLE 3-4. VOLTAGE AND CURRENT PARAMETER DEFINITIONS (CONTINUED) Term Definition To modify refer to PAR. Local Remote Minimum (box) +Voltage Protect Min –Voltage Protect Max Current mode only. Minimum (positive) setting for +Voltage Protect and maximum (maximum negative) setting for –Voltage Protect. Values of ±Voltage Protect between +Voltage Protect Min and –Voltage Protect Max (near zero) are not allowed.
FIGURE 3-7. MAX/MIN SETTINGS MENU Selection of Bipolar does not immediately change the protect limit values; it changes how the protect settings are displayed and set from the power-up screen. So if maximum/minimum protection limits were set to different values, (e.g, for BOP 36-28MG, current mode, no load, +V Protect Max = 25V and –V Protect Min = 7V) when BIPOLAR is selected, the previous protection values (+25, –7) will remain in place until a new value is entered in the Voltage Protection field.
3.3.4 CHANGING MAXIMUM OR MINIMUM SOFTWARE-CONTROLLED LIMITS The maximum or minimum allowable voltage and current settings of the unit can be reduced from the nominal using the Max/Min Settings menu. which lists the system’s software-controlled voltage and current limits (+Voltage Max, –Voltage Min, +Current Max, –Current Min) as well as the corresponding protection limits organized by operating mode.
TABLE 3-5. MAX/MIN SETTINGS MENU (CONTINUED) CHOICES (BOLD = Factory Default) FUNCTION +V Protect Max (value) Eomax +1% of Eomax Defines the maximum value that +Voltage Protect can be set to. To modify refer to 3.3.4.1. +V Protect Min (internal value) Not Adjustable Defines the minimum value that +Voltage Protect can be set to. This is a calculated value and is not adjustable from the front panel.
3. Highlight the voltage or current max/min value and press ! to change it. Software limits are absolute values (do not use minus sign for negative limits). Use number keys to change the setting, then $ to save. 4. When complete, press $ to save for power-up, (without saving for power-up) and exit. # to abort, or % to apply the changes 5. Upon return to the power-up screen, the main channel (voltage or current) is compared against the main channel limits in effect.
3.3.5 ENABLING/DISABLING DC OUTPUT POWER The BOP output can be disabled (OFF) or enabled (ON) by toggling the STANDBY key in local mode or sending the SCPI OUTPut ON or OUTPut OFF command (see PAR. B.13) via the selected digital remote control bus (see PAR. 3.5). The behavior of the unit when disabled depends on the Load Type setting (see PAR. 3.3.6 and Table 3-6 for details). 3.3.
WARNING Accessing the BOP after the output is disabled in BATTERY mode is hazardous because (1) high current arcing is possible and (2) either the external battery voltage, or the voltage (±Voltage Protection max) on the BOP output terminals may be dangerous. Therefore, for battery and constant-voltage-type active electronic loads it is recommended that two properly rated external switches be installed for safety: one in series with the battery, and one across the BOP output.
3.3.7 CHANGING THE DEFAULT POWER UP SETTINGS When the BOP is shipped, the following default settings are programmed to be in effect each time the unit is turned on, however these defaults may be changed as indicated below; • • • • • Mode: Voltage (may be voltage or current, see PARs. 3.3.2 and 3.4.2. Table 3-7 illustrates the relationship between Mode, Main Channel, Protection Type and Levels settings. Main Channel: Internal (may be Internal, External, or External Reference Level, PARs. 3.3.3 and 3.4.3).
TABLE 3-7. EXAMPLES SHOWING HOW POWER-UP SETTINGS FUNCTION (CONTINUED) Mode Voltage Current 3.3.8 Main Channel Protection Type Levels Power-up condition (output ON) (All referenced pins located on Analog I/O Port see PAR. 3.4 and Figure 2-1) Internal External or Lesser Limit Voltage: 10 Current: 25 Unit powers up in voltage mode, 0V, ±current protection determined by pins 5 and 13 (see PAR. 3.4.4 for External, PAR. 3.4.4.1 for Lesser Limit).
If Protection type was saved as External, EXT is listed under the Prot heading. In this case the protection settings are determined by the levels applied to the appropriate pins of the Analog I/O Input Port (see Table 2-10). If the main channel is voltage, the protection settings are determined by pin 5 (negative current protection) and pin 13 (positive current protection).
TABLE 3-8. SAVE/RECALL MENU CHOICES (BOLD = Factory Default) PARAMETER FUNCTION NOTE: DEFAULT values for empty cells are the settings of the unit at the time the save/recall menu is entered. VOLT CURRENT EXTERNAL VOLT - Selects voltage mode. Voltage value determined by SETTING. CURRENT - Selects current mode. Current value determined by SETTING. EXTERNAL - Used for customized configuration where EXT VM/CM signal at pin 2 of I/O port controls mode; consult factory for details.
3.3.8.4 COPYING PREVIOUSLY SAVED SETTINGS TO A NEW LOCATION 1. Press ! from the power-up screen to enter the Saved Setups screen (Figure 3-8). 2. Use the U and Y keys to highlight the location to be copied, then press $. 3. Highlight an Empty location and press $ to save to the highlighted location, or press % to abort the copy. 3.3.8.5 APPLYING SAVED SETTINGS TO THE OUTPUT (RECALL) 1. Press ! from the power-up screen to enter the Save/Recall menu. 2.
FIGURE 3-9. 3.3.9.3 SAVED WAVEFORMS MENU UNDERSTANDING HOW WAVEFORMS ARE GENERATED Waveform are generated by the BOP by producing a series of discrete output levels (points) in a prescribed pattern. In the case of sine, triangle and ramps, this produces an output that conforms to an approximation of the selected waveform type. The number of points available for a waveform is limited to 3933 for all segments.
TABLE 3-9. SINE, TRIANGLE AND RAMP WAVEFORM FREQUENCY VS. POINTS Frequency (See Notes 1, 2, and 3) From To 0.01Hz 2.7Hz Total Points 3840 Frequency (See Notes 1, 2, and 3) Total Points From To 55.5Hz 66.5Hz 160 2.71Hz 3.6Hz 2880 66.6Hz 88.7Hz 120 3.71Hz 5.5Hz 1920 88.8Hz 118.3Hz 90 5.6Hz 8.3Hz 1280 118.4Hz 147.9Hz 72 8.4Hz 11.0Hz 960 148Hz 177.4Hz 60 11.1Hz 14.7Hz 720 177.5Hz 221.8Hz 48 14.8Hz 22.1Hz 480 221.9Hz 295.8Hz 36 22.2Hz 33.2Hz 320 295.81Hz 354.
whether the segment is initial (run only the first time) or repeating is indicated by I or R, respectively. To see the offset, start/stop angle, initial/repeat for a segment, use Y or U or the encoder to highlight the segment, then press ! (Initial/Repeat is not available for the last segment, since the last segment must repeat).
mode can not be edited; to change from a voltage waveform to a current waveform, refer to PAR. 3.3.9.8 to start a new waveform.) Use Y or U or ADJUST to highlight the segment, then press ! to edit, When editing a segment, a submenu showing the parameters for that segment will open (see Table 3-11). Use Y or U or the encoder to highlight the parameter, then press ! to edit, change the parameter, then press $ to save or % to abort.
To delete a segment, highlight the segment at the Waveform Settings screen (Figure 3-10), the press #, to permanently erase the segment. This change is saved immediately and can not be undone. To add a segment, at the Waveform Settings screen (Figure 3-10) highlight the segment following the one to be added (e.g., if there are three existing segments (1, 2, 3), to add a segment between 2 and 3, highlight 3. To add a segment following 3, highlight End of Segments.
6. When adding a new segment, the parameters of the highlighted segment are copied. It is not possible to move or copy a segment to another location. Refer to Table 3-11, Note 2 for details about initial vs. repeating segments. Refer to PAR. 3.3.9.9 for a detailed example of how to add segments to build a complex waveform. 3.3.9.
3. From the Waveform Settings screen, highlight segment NEG RAMP 50.0HZ 4.00 R 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 Initial/Repeat Level 0.002 0 Initial 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.
When all settings are complete, press $ to save for power-up. This step create a repeating 1/4 sine wave that starts at 6V and rises to 10V over 5 ms (1/4 of 20ms period established by 50Hz frequency). The waveform shown in Figure 3-11 has now been saved. Note that by careful calculation of period and start/stop angle, accurate waveform simulations can be attained. 7.
TABLE 3-13. ERROR MESSAGE EXPLANATIONS (CONTINUED) ERROR MESSAGE EXPLANATION %, highlight password Save Disabled, Request ignored Save Display Change is disabled. From power-up screen, press settings to enable. EXTERNAL MODE enabled. MODE key does not function while Mode is being controlled externally. Press light External Mode and change to Disable. F2 Key not valid F2 only works when labeled. key was probably pressed inadvertently. Password incorrect Enter the correct password and press .
BOP as a power amplifier (PAR. 3.4.3) and 3) establish the protection limits (PAR. 3.4.4). An output signal proportional to output current is also provided for external use (PAR. 3.4.5). 3.4.1 REMOTE OUTPUT OFF There are two ways two turn off the output using remote signals: (1) Remote Shutdown which requires the unit to be turned off, then on in order to restore operation and (2) Remote Standby which sets the output to OFF, putting the unit in STANDBY status. 3.4.1.
FIGURE 3-14. 3.4.1.2 REMOTE SHUTDOWN USING INTERNAL POWER, MULTIPLE UNITS, 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.
3.4.3 CONTROLLING THE OUTPUT USING THE BOP AS A POWER AMPLIFIER The BOP can function as a power amplifier by means of the External Reference input at the Analog I/O port. This analog signal controls the main channel of the BOP. To use the BOP as a power amplifier see the following instructions for using the external reference: PAR. 3.4.3.1 for fixed gain, PAR. 3.4.3.2 for variable gain by establishing the maximum full scale output. TABLE 3-14.
2. To return to digital or local control, from the power-up screen press $, then highlight Reference Input and press !. Highlight Internal and press $ to save. Then press % to apply the change and exit. TABLE 3-15.
For linear response (input vs. output) the software limit (see 3.3.4.1) should be set to nominal and the maximum peak value (d-c plus a-c) of the reference signal must not exceed ±10V. If the input signal exceeds the limit value (either ±10V if the software limit is set to nominal, or a lesser 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.
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.
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. This signal is available at pin 3, referenced to pin 10, of the Analog I/O port.
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. Once the mode (voltage or current) is programmed, program the active parameter to zero and the complementary limit parameter to the maximum anticipated for application. Then program only the active parameter.
#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.
3.5.3.1.1 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.
3.5.3.5.3 TRIGGER OPERATION DIFFERENCES IN BIT 4886 The BOP/BIT 4886 only supports *TRG while the BOP 1KW support TRIGGER:SOURCE EXTERNAL, BUS and IMMEDIATE. The command TRIG:SOUR BUS must be sent before using trigger in the BOP 1KW. 3.5.
TABLE 3-19. IEEE 488 (GPIB) BUS COMMAND MODE MESSAGES (CONTINUED) MESSAGE DESCRIPTION MNEMONIC COMMENTS MLA My Listen Address Received MTA My Talk Address Received OTA Other Talk Address Received RFD Ready for Data Received or Sent SDC Selected Device Clear Received SPD Serial Poll Disable Received SPE Serial Poll Enable Received SRQ Service Request Sent UNL Unlisten Received UNT Untalk Received TABLE 3-20. IEEE 488 (GPIB) BUS DATA MODE MESSAGES MNEMONIC 3.5.
3.5.6 RS232-C OPERATION The BOP may be operated via an RS232-C terminal, or from a PC using a terminal emulation program. The default settings are as follows: • Baud rate: OFF • Parity: None • Data Bits 8 • Stop Bits 1 • Prompt DISABLE • XON/XOFF ENABLE To change baud rate, or select prompt, echo or XON/XOFF, refer to PAR. 3.5.3.2 and Table 316. 3.5.6.
FIGURE 3-17. RS 232 IMPLEMENTATION Only seven control characters (characters between 00H and 1FH) are acknowledged by the power supply: • Carriage Return (CR, 0DH) • Line Feed (LF, 0AH) • Back Space (BS, 08H) • Escape (ESC, 01BH) • XON (011H) • XOFF (013H) • CAN (018H) BS deletes the last character entered, with the exception of CR or LF characters. Either the CR or LF character acts as the line terminator, initiating parsing of the ASCII data sent to the BOP by the command originator.
All non-control characters are sent via the serial port of the command originator. The control character BS is echoed as BS Space BS. Only the first control character is returned in response to either a CR LF or LF CR character sequence (see Figure 3-17). 3.5.6.2.1 XON XOFF METHOD The XON XOFF method allows the BOP to control when the command originator is allowed to send data.
1. From the power-up screen press % key to enter the General Setup menu, then highlight Revisions/TEST. press ! to enter the Test Subsystem menu. 2. Highlight Serial Interface and press # to run the test with the Loop Back Test connector NOT installed and verify the LCD reads Failed. If the LCD reads Passed, the power supply is defective and requires repair. 3. Install the loop back test connector into RS 232 port and press the # key to rerun the test.
3.6.3 SCPI SUBSYSTEM COMMAND/QUERY STRUCTURE Subsystem commands/queries are related to specific power supply functions (such as setting output voltage, current limit, etc.) Figure 3-18 is a tree diagram illustrating the structure of SCPI subsystem commands used in the BOP Power Supply with the “root” at the left side, and specific commands forming the branches. The following paragraphs introduce the subsystems; subsystem commands are defined and explained in Appendix B. 3.6.3.
3.6.3.6 OUTPUT SUBSYSTEM This subsystem controls the power supply's voltage and current outputs 3.6.3.7 MEMORY SUBSYSTEM This subsystem controls the Flash Memory used by the BOP microprocessors and is used for storing setup parameters and for storing a list for later recall and execution The unit’s configuration, voltage and current, saved setups (*SAV and *RCL command) and Calibration values are stored in Flash Memory.
ROOT : (colon) ABORt subsystem STATus subsystem ABORt STATus :OPERation :CONDition? :ENABle val :ENABle? [:EVENt]? :PRESet :QUEStionable :CONDition? :ENABle val :ENABle? [:EVENt]? INITiate subsystem INITiate [:IMMediate] :CONTinuous bool :CONTinuous? CALibrate subsystem CALibrate :CEXTernal MAX, ZERO :CGAin MIN MAX :CLIMit MAX, ZERO :CPRotect MIN, MAX :CURRent MIN, MAX :DATA val :SAVE :STATe , password :STATe? :VEXTernal MAX, ZERO :VOLTage MIN, MAX :VGAin MIN, MAX :VLIMit MAX, ZERO :V
ROOT : (colon) [SOURce:] subsystem [SOURce:] VOLTage [:LEVel] [:IMMediate] [:AMPLitude] val [:AMPLitude]? MIN, MAX :TRIGgered [:AMPLitude] val [:AMPLitude]? :LIMit[:BOTH] [:BOTH]? :NEGative :NEGative? :POSitive :POSitive? :MODE FIXed, LIST, TRANsient, EXTernal, GAIN, PROTect :MODE? :PROTect [:BOTH] [:BOTH]? :MODE INT, EXT, LESS :MODE? :NEGative :NEGative? :POSitive :POSitive? :LIM[:BOTH] :LIM[:BOTH]? :LIM:NEGative :LIM:NEGative? :LIM:POSitive :LIM:POSitive? Requires MEM:UPD to save for power-up.
3.6.3.10 [SOURCE:]VOLTAGE AND [SOURCE:]CURRENT SUBSYSTEMS These subsystems program the output voltage and current of the power supply. 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.
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. 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. The 1 in the event register causes bit 3 of the status byte to be asserted.
Request register. If bit 6 is a 1 (true), it causes the MBT-G power supply to assert the SRQ line to the host controller. Figure 3-20 also shows that if the error/event queue is not empty, bit 3 is set in the Service Request register and bit 4 indicates that a message is available in the output buffer. 3.6.7.2 OPERATIONAL STATUS REGISTER The OPERational condition register contains conditions which are a part of the instrument’s normal operation.
NOTE: If External Reference is enabled and a protection error occurs, both Voltage Protect Error (bit 12) and Current Protect Error (bit 13) are set 3.6.8 • 13 - Current Protect Error — 1 indicates a Current protection error has been detected. • 14 - Sinking — 1 indicates the unit is absorbing energy from the load. • 15 Not Used — always zero. SCPI PROGRAM EXAMPLES Refer to Appendix B, Figures B-1 through B-12 for examples illustrating the use of SCPI commands.
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.
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.Send CAL:ZERO to prepare for current calibration. After sending the command, the BOP output will be set to zero volts.
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. Continue to measure the output current of the supply using the DVM connected to the sense resistor. To adjust, send CAL:DATA commands as needed (see PAR. 4.
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.Set the BOP to minimum (maximum negative) output by sending CAL:VLIM MIN, then send the CAL:ZERO command.
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. • # - EXTRL CONTROLS - Selects input and output signal calibration used for multiple units and the external protection. • $ - SAVE - Save New Calibration Setting.
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. • # - Adjusts the MINIMUM (Negative) for this operational mode • $ - PROTECT - Adjusts External Protection limits.
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. Adjust the BOP output as needed until the DVM reads as close to zero as possible within tolerance specified in Table 4-3 for VOLTAGE ZERO. Press % once. 3. Press @ - POSITIVE. Measure the voltage output using the DVM.
13.Press # - EXTERNAL, @ - POSITIVE. Adjust as needed until the DVM reads as close as possible above the nominal full scale value within tolerance specified in Table 4-3 for +FULL SCALE VOLTAGE. Press % three times. 14.Connect a 0V ±0.1mV d-c reference to pin 8 (S_IN_SERIAL) of the PAR/SER CONTROL IN connector (A2A5J3) referenced to pin 1 (use mating connector supplied with the unit, P/N 142-0488 to gain access to PAR/SER CONTROL IN connector pins).
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.Press # - EXTERNAL, ! - ZERO to set the BOP to zero volts across the sense resistor (corresponding to zero current). Adjust as needed until the DVM reads as close to zero as possible within the limits specified in Table 4-4 for CURRENT ZERO. Press % twice. 24.
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 or 0> (ASCII) 0 placed in output queue if power supply has not completed operation after prior *OPC command. 1 placed in output queue when power supply has completed operation. Description: Indicates when pending operations have been completed. *OPC command must be sent to first to clear status bit 0 (Operation Complete).
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 CCAL RL1 MEANING Support for limit calibrations is present. Commands sent over GPIB cause unit to enter remote mode. MEMM Computer location commands are supported. LSTAPL LIST Apply command is 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: 7 bits coded per Table A-4. 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 128 is returned to indicate the cause of the error. The test executes each of the subtests even when any one fails. If any test fails an error code bit is set which is returned to the user.
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.146, 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:]LIST:CURR:APPL B.54 CAL B.
TABLE B-1. SCPI SUBSYSTEM COMMAND/QUERY INDEX (CONTINUED) COMMAND PAR. COMMAND PAR. [SOUR:]VOLT:PROT:POS, ? B.100, B.101 SYST:COMM:SER:ECHO, ? B.124, B.125 [SOUR:]VOLT:PROT:LIM[:BOTH], ? B.102, B.103 SYST:COMM:SER:PACE, ? B.126, B.127 [SOUR:]VOLT:PROT:LIM:NEG, ? B.104, B.105 SYST:COMM:SER:PROM, ? B.128, B.129 [SOUR:]VOLT:PROT:LIM:POS, ? B.106, B.107 SYST:ERR? B.130 [SOUR:]VOLT:TRIG B.108, B.109 SYST:ERR:CODE? ALL? B.131, B.132 STAT:OPER:COND? B.110 SYST:KEYB, ? B.133, B.
CAL:CEXT command CAL:CGA command CAL:CLIM command CAL:CPR command CAL:CURR[:DATA] command CAL:DATA value command CAL:DPOT command CAL:SAVE command B.5 INITiate[:IMMediate] COMMAND Syntax: Short Form: INIT:[IMM] CAL:STAT command and query CAL:VEXT command CAL:VGA command CAL:VLIM command CAL:VOLT[:DATA] command CAL:VPR command CAL:ZERO command INIT[:IMM] Long Form: INITiate[:IMMediate] Description: Enables a single trigger. This command enables a single trigger.
B.6 INITiate:CONTinuous COMMAND Syntax: INIT:CONT Short Form: INIT:CONT {ON | OFF} or {1 | 0} (1 = on, 0 = off) Long Form: INITiate:CONTinuous {ON | OFF} or {1 | 0} (1 = on, 0 = off) Description: INIT:CONT ON enables continuous triggers.; INIT:CONT OFF disables continuous triggers. If INIT:CONT is OFF, then INIT[:IMM] arms the trigger system for a single trigger. If INIT:CONT is ON, then the trigger system is continuously armed and INIT[:IMM] is redundant.
B.12 MEMory:UPDate COMMAND Syntax: MEM:UPD Short Form: MEM:UPD {INT | LIM | SER | CONT | OUTP} Long Form: MEMory:UPDate {INTerface | SERial | LIMits | CONTrast | OUTPut} Description: Saves selected variables. MEM:UPD INT saves GPIB address, Language (SCPI or CIIL) and all SYST:SET (PAR. B.142) variables. MEM:UPD SER saves the serial communication state, baud rate, pace control and echo information.
NOTES: 1. The power supply is assumed to be operating in constant voltage mode. 2. This example creates a 3-Ampere, 100-millisecond current pulse and performs a current measurement during the first five milliseconds of the pulse. list:cle list:set:sample .0003125 Clear list. Establishes the sample timing. The value was determined by dividing the sample time (0.005S) by the number of samples (16): (0.005/16 = 0.0003125). list:curr 0;:list:dwell .
OUTP? B.14 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.
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).
CURR:LIM:POS B.23 [SOURce:]CURRent[:LEVel]:LIMit:POS COMMAND Syntax: Short Form: [SOUR:]CURR[:LEV]:LIM:POS Long Form: [SOURce:]CURRent[:LEVel]:LIMit:POSitive where is between zero and the rated (nominal) output voltage Description: Establishes the positive software limit for output current, i.e., sets the maximum value of output current that the unit will be allowed to source (quadrant 1, Figure 1-3) or sink (quadrant 4) to the value specified by the user.
B.28 [SOURce:]CURRent[:LEVel]:PROTect[:BOTH] QUERY Syntax: CURR:PROT[:BOTH]? Short Form: [SOUR:]CURR[:LEV]:PROT[:BOTH]? Long Form: [SOURce:]CURRent[:LEVel]:PROTect[:BOTH]? Returns , Description: Identifies the protection limits for current (source, sink), the maximum current the unit will source.or sink B.
B.35 [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 1-3) 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.12) to save for power up. See PAR. 3.5.2.
CURR:TRIG B.41 [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.
NOTES: Examples below are intended only to illustrate command functions. Refer to PAR. 3.5.2 for programming techniques to optimize performance. LIST:CLEAR LIST:RES? Initializes the list process. Returns 0.000093,0.034000,nnnn (where nnnn = total number of points available). LIST:VOLT:POINTS? Returns 0. LIST:VOLT:POINTS? MAX Returns 5900. LIST:VOLT:APPLY SINE,15,10 Causes the BOP to generate points.for 15Hz sine wave, 10V p-p.
.VOLT:MODE LIST Executes the list. For 240 milliseconds the BOP outputs a staircase triangle wave from -20V to +20V and back down to -20V. This staircase will have a uniform spacing between voltage changes of 10 milliseconds and will repeat 100 times. VOLT? Returns +20 (the last step in the list set the unit to +20V. LIST:COUNT? Returns 100. LIST:COUNT 10 Determines that the list will be repeated 10 times when executed. LIST:COUNT? Returns 10. VOLT:MODE LIST Initiates execution of the list.
LIST:CURR B.52 [SOURce:]LIST:CURRent COMMAND Syntax: Short Form: LIST:CURR , , . . . (to max of 5900 data points for global dwell time) Long Form: LIST:CURRent , , . . . (to max of 5900 data points for global dwell time) = digits with decimal point and Exponent, e.g., 2.71E1 for 27.1 Description: Adds the current value (in Amps) to list.
B.56 [SOURce:]LIST:CURRent:APPLy:SWEep? QUERY Syntax: LIST:CURR:APPL:SWE? Short Form: LIST:CURR:APPL:SWE? Long Form: LIST:CURRent:APPLy:SWEep? Return Value: , (0.01 to 360) Description: Returns start and stop angle in degrees for either triangle and sine waveforms. LIST:CURR:POIN? B.
LIST:QUER? B.62 [SOURce:]LIST:QUERy? QUERY Syntax: Short Form: LIST:QUER? Return Value: Long Form: LIST:QUERy? Description: Identifies first location to be queried by LIST:VOLT?, LIST:CURR?, LIST:DWEL? queries. Related Commands: LIST:QUER, LIST:CURR?, LIST:DWEL?. LIST:QUER?. (See example, Figure B-5.) B.
B.66 [SOURce:]LIST:SAMPle:VOLTage COMMAND Syntax: LIST:SAMP:VOLT Short Form: LIST:SAMP:VOLT average,value Long Form: LIST:SAMPle:VOLTage average,value where: average = number of measurements = integer: 2,4,8,16,32,64,128 or 256 value = programmed current (Amps) for current list, or programmed voltage (Volts) for voltage list. Description: Samples output voltage. is either programmed current in Amperes, or programmed voltage in Volts. can only be 2, 4, 8, 16, 32, 64, 128 or 256.
B.71 [SOURce:]LIST:SET:TRIGger? QUERY LIST:SET:TRIG? Syntax: Short Form: LIST:SET:TRIG? Long Form: LIST:SET:TRIGger? Returns = trigger pulse-width between 0.00025 and 0.034 second Description: Returns trigger pulse-width. If trigger pulse duration has not been set, error 100- “command error” results. B.72 [SOURce:]LIST:SET:WAIT COMMAND LIST:SET:WAIT Syntax: Short Form: LIST:SET:WAIT value Long Form: LIST:SET:WAIT value where: = time-out for a wait command between .00025 and .
NOTES: 1. The power supply is assumed to be operating in constant voltage mode. 2. The WAIT commands provide a method to synchronize multiple instruments to a common control pulse. This example assumes BOP and a number of switching DVMs are connected to a Unit Under Test (UUT). The DVMs are programmed to wait 1 millisecond after a high pulse is received from the host computer, then take a few measurements.
NOTES: 1. The power supply is assumed to be operating in constant voltage mode. 2. This example assumes a BOP and a DVM is connected to a Unit Under Test (UUT). The DVM is connected to EXT_E/ EXT_C (pins 5/6 of the BOP External Protection port). When the BOP outputs a low EXT_E/ EXT_C, The DVM takes a series of measurements and places its wait line low. The DVM Wait line is connected to the Trigger Input (pin 3 of the of the BOP.
LIST:VOLT:APPL B.
NOTES: 1. The power supply is assumed to be operating in constant voltage mode. 2. The WAIT commands provide a method to synchronize multiple instruments to a common control pulse. This example assumes BOP and a number of switching DVMs are connected to a Unit Under Test (UUT). The DVMs are programmed to wait 1 millisecond after a low-going edge is received from the host computer, then take a few measurements.
LIST:WAIT:LOW B.83 [SOURce:]LIST:WAIT:LOW COMMAND Syntax: Short Form: LIST:WAIT:LOW value Long Form: LIST:WAIT:LOW value where: = programmed current (Amps) for current list, or programmed voltage (Volts) for voltage list. Description: Waits for the trigger input to go low before advancing to next step. When the command is executed the output is immediately set to the . Pins 1 (GND) and 3 of the Trigger Port are used as the input trigger.
B.88 [SOURce:]VOLTage[:LEVel]:LIMit:NEGative COMMAND Syntax: VOLT:LIM:NEG Short Form: [SOUR:]VOLT[:LEV]:LIM:NEG Long Form: [SOURce:]VOLTage[:LEVel]:LIMit:NEGative where is between zero and rated (nominal) output voltage Description: Establishes the software limit for negative output voltage, i.e., sets the maximum value of negative output voltage that the unit will be allowed to produce. Requires MEM:UPD (PAR. B.12) to save for power up. See PAR. 3.5.2.
VOLT:MODE? B.93 [SOURce:]VOLTage:MODE? QUERY Syntax: Short Form: [SOUR:]VOLT[:LEV]:MODE? Long Form: [SOURce:]VOLTage[:LEVel]:MODE? Return value: FIX, LIST, TRANS, EXT, or GAIN Description: Identifies active voltage mode. See PAR. B.92 for further details Related Commands: LIST commands. (See example, Figure B-5.) B.
VOLT:PROT:NEG B.98 [SOURce:]VOLTage[:LEVel]:PROTect:NEGative COMMAND Syntax: Short Form: [SOUR:]VOLT[:LEV]:PROT:NEG Long Form: [SOURce:]VOLTage[:LEVel]:PROTect:NEGative where is between minimum (box) value (Figure 1-3) and 1% above rated (nominal) output voltage. Description: Establishes the negative protection limit for voltage; maximum is 1% greater than rated output voltage. VOLT:PROT:NEG? B.
B.105 [SOURce:]VOLTage[:LEVel]:PROTect:LIMit:NEGative? QUERY VOLT:PROT:LIM:NEG? Syntax: Short Form: [SOUR:]VOLT[:LEV]:PROT:LIM:NEG? Long Form: [SOURce:]VOLTage[:LEVel]:PROTect:LIMit:NEGative? Returns: Description:Identifies the minimum (maximum absolute) value possible for the negative protection limit for voltage. B.
STAT:OPER:ENAB B.111 STATus:OPERation:ENABle COMMAND Syntax: Short Form: Long Form: STAT:OPER:ENAB STATus:OPERation:ENABle Description: Sets Operation Enable Register. The Operation Enable Register is a mask for enabling specific bits in the Operation Event Register which will cause the operation summary bit (bit 7) of the Status Byte register to be set Bit set to 1 = function enabled (active, true); bit reset to 0 = function disabled (inactive, false).
B.117 STATus:QUEStionable:ENABle COMMAND Syntax: Short Form: STAT:QUES:ENAB STAT:QUES:ENAB Long Form: STATus:QUESionable:ENABle Description: Programs Questionable Condition Enable Register (see Table B-4).
STAT:QUES:ENAB? B.118 STATus:questionable:ENABle? QUERY Syntax: Short Form: STAT:QUES:ENAB? Long Form: STATus:QUESionable:ENABle? Return Value: actual register value Description: Reads Questionable Condition Enable Register (see Table B-4). Power supply returns value of Questionable Condition Enable Register, indicating which conditions are being monitored. Bit set to 1 = function enabled (active, true); bit reset to 0 = function disabled (inactive, false). Related Commands: STAT:QUES?.
SYST:COMM:SER:PACE B.126 SYSTem:COMMunication:SERial:PACE COMMAND Syntax: Short Form: SYST:COMM:SER:PACE {NONE | XON} Long Form: SYSTem:COMMunication:SERial:PACE {NONE | XON} Description: Enables (XON) or disables (NONE) data flow control via the serial interface (see PAR. 3.5.6.2.1). See PAR. 3.5.2.2 and Figure 3-16 for special programming considerations. B.
SYST:KEYB? B.134 SYSTem:KEYBoard? QUERY Syntax: Short Form: SYST:KEYB? Long Form: SYSTem:KEYBoard? Returns: 1 or 0 Description:Identifies the state of the keypad: locked (1) or unlocked (0). SYST:PASS:CEN B.135 SYSTem:PASSword:CENable COMMAND Syntax: Short Form: SYST:PASS:CEN Long Form: SYSTem:PASSword:CENable Description: Sets the password enable state if the value matches the current Main password. This command allows CALibrate commands to operate. SYST:PASS:CDIS B.
SYST:SEC:IMM B.141 SYSTem:SECurity:IMMediate COMMAND Syntax: Short Form: SYST:SEC:IMM Long Form: SYSTem:SECurity:IMMediate Description: Initializes all NVRAM variable to factory defaults. Empties all memory locations. See PAR. 3.5.2.2 and Figure 3-16 for special programming considerations. This command is password protected (must be preceded by SYST:PASS:CEN (see PAR B.135). SYST:SET B.
TRIG:SOUR B.145 TRIGger:SOURce COMMAND Syntax: Short Form: TRIG:SOUR {BUS | EXT | IMM} Long Form: TRIGger:SOURce {BUS | EXT | IMM} Description: Selects the active trigger source. When TRIG:SOUR BUS is set, an event trigger is created by sending either *TRG or GPIB commands. When TRIG:SOUR EXT is set, the trigger is created by connecting the external trigger line (J2, pin 4 or pin 3 of the mating connector for J2) to analog signal ground (J2, pin 1 or J2 mating connector, pin 1).
TABLE B-5. ERROR MESSAGES (CONTINUED) ERROR MESSAGE -221,”Settings Conflict” -222,“Current, Voltage or Data out of range” -223,“Too Much Data” 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).