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KEPCO MBT Series Operator's Manual

360 watt programmmable power supplies
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IMPORTANT NOTES:
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©2009, KEPCO, INC
KEPCO, INC.
www.valuetronics.com
OPERATOR'S MANUAL
POWER SUPPLY
360 WATT PROGRAMMMABLE POWER SUPPLIES
This manual is valid for the following Model and associated serial numbers:
MODEL
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 num-
bers. Before using this Instruction Manual, check your equipment serial number to identify
your model. If in doubt, contact your nearest Kepco Representative, or the Kepco Docu-
mentation Office in New York, (718) 461-7000, requesting the correct revision for your
particular model and serial number.
The contents of this manual are protected by copyright. Reproduction of any part can be
made only with the specific written permission of Kepco, Inc.
Data subject to change without notice.
131-38 SANFORD AVENUE
email: hq@kepcopower.com
MBT SERIES
MODEL
MBT SERIES
POWER SUPPLY
ORDER NO.
SERIAL NO.
REV. NO.
FLUSHING, NY. 11355 U.S.A.
World Wide Web: http://www.kepcopower.com
REV. NO.
KEPCO
THE POWER SUPPLIER™
TEL (718) 461-7000
FAX (718) 767-1102
®

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  • Page 1 Before using this Instruction Manual, check your equipment serial number to identify your model. If in doubt, contact your nearest Kepco Representative, or the Kepco Docu- mentation Office in New York, (718) 461-7000, requesting the correct revision for your particular model and serial number.
  • Page 2 www.valuetronics.com...
  • Page 3 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: Component Power Supply Type of Equipment: Model No.:...
  • Page 4 There are no user or operator serviceable parts within the product enclosure. Refer all servicing to qualified and trained Kepco service technicians. 228-1351 COND/CONFORM 111609...

  • Page 5: Safety Instructions

    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. The product should never be operated with the cover removed unless equivalent protection of the operator from accidental contact with hazardous internal voltages is provided: There are no operator serviceable parts or adjustments within the product enclosure.
  • Page 6 www.valuetronics.com...

  • Page 7: Table Of Contents

    TABLE OF CONTENTS SECTION PAGE SECTION 1 - INTRODUCTION Scope of Manual ............................. 1-1 General Description..........................1-1 Specifications ............................1-1 Features ..............................1-5 1.4.1 Local Control............................1-5 1.4.2 Remote Control..........................1-5 Options ..............................1-5 1.5.1 Option G - Single Board Computer....................1-5 1.5.2 Option R - Output/Polarity Reversal Relays ..................
  • Page 8 TABLE OF CONTENTS (Continued) SECTION PAGE 3.2.1.6.6 Voltage Control — M, MG Models..................3-17 3.2.1.6.7 Voltage Control — MR, MGR Models..................3-18 3.2.1.7 Setting Output Current or Current Limit ..................3-19 3.2.1.7.1 Using Iadj and Numeric Keys — M, MG Models ..............3-19 3.2.1.7.2 Using Iadj and Numeric Keys —...
  • Page 9 4.1.13.6 Status............................4-9 4.1.13.7 Menu-selectable Parameters ....................... 4-9 4.1.14 Remote Control..........................4-9 MBT Series Block Diagram Circuit Description ..................4-10 Detailed Circuit Descriptions ........................4-12 4.3.1 Analog Control Board A1 ........................4-13 4.3.2 Relay and Flags Board A2......................... 4-14 4.3.3 Digital Control Board A3 ........................
  • Page 10 TABLE OF CONTENTS (Continued) SECTION PAGE 4.3.8 Front Panel Board A8 ........................4-17 4.3.9 Sensing Resistor and Crowbar Circuit A10..................4-18 4.3.10 Alphanumeric Display (LCD) A11 ..................... 4-18 4.3.11 Keypad A12 ............................4-18 4.3.12 "G" Option Components — MG, MGR Models ................. 4-18 4.3.12.1 Single Board Computer (SBC) A13 —...
  • Page 11 TABLE OF CONTENTS SECTION PAGE B.27 STATus:PRESet Command ........................B-7 B.28 STATus:QUEStionable[:EVENt]? Query ....................B-8 B.29 STATus:QUEStionable:CONDition? Query .................... B-8 B.30 STATus:QUEStionable:ENABle Command.................... B-9 B.31 STATus:QUEStionable:ENABle? Query....................B-9 B.32 STATus:QUEStionable:INSTrument? Query ..................B-9 B.33 STATus:QUEStionable:INSTrument1? Query ..................B-9 B.34 STATus:QUEStionable:INSTrument2? Query ..................B-10 B.35 STATus:QUEStionable:INSTrument:ENABle Command................
  • Page 12 TABLE OF CONTENTS SECTION PAGE MBT 55-7 111609 www.valuetronics.com...
  • Page 13 Voltage Comparison Equivalent Circuit ...................... 4-2 Current Comparison Equivalent Circuit....................... 4-3 MBT Series Power Supply, Overall Block Diagram ..................4-11 MBT Series Power Supply, Location of Major Components ............... 4-12 GPIB Commands ............................A-3 Using the *WAIt-to-continue Command ..................... A-6 Use of INSTrument:CATalog Query ......................
  • Page 14 LIST OF FIGURES (Continued) FIGURE TITLE PAGE viii MBT 55-7 111609 www.valuetronics.com...
  • Page 15 LIST OF TABLES TABLE TITLE PAGE Model Parameters ............................1-1 General Specifications ..........................1-2 Equipment Supplied ............................1-7 Accessories ..............................1-7 Internal Controls Accessible Through Top Cover ..................2-3 Input/Output Pin Assignments for Remote Control ..................2-4 Node Address Selection ..........................2-6 Internal Jumper Configuration ........................2-12 Front Panel Controls And Indicators ......................3-3 Key Functions .............................3-4 Using Vadj and Keypad Entries To Set Output Voltage/Voltage Limit —...

  • Page 16: Mbt Series Programmable Power Supply

    FIGURE 1-1. MBT SERIES PROGRAMMABLE POWER SUPPLY MBTSVC111609 www.valuetronics.com...

  • Page 17: Scope Of Manual

    SECTION 1 - INTRODUCTION SCOPE OF MANUAL This manual contains instructions for the installation and operation of the MBT series of 360 Watt (half rack), voltage and current stabilized d-c power supplies manufactured by Kepco, Inc., Flushing, New York, U.S.A.
  • Page 18 TABLE 1-2. GENERAL SPECIFICATIONS CHARACTERISTIC REQUIREMENT INPUT A-c Voltage (User selectable) 105-125V/210-250V a-c A-c Input Frequency Range 47-63 Hz 115V a-c 7.5 Amperes (nominal) A-c Input Current 230V a-c 3.7 Amperes (nominal) OUTPUT Voltage/Current Adjustment 0 - 100% of rating, either continuously (inherent resolution), by step or by programmed setting. Range Remote Sensing Range 0.5V per lead...
  • Page 19 0.001%/0.01% E OMAX or 0.3mV/3mV (whichever is greater) Ripple & Noise (rms/p-p) Current 0.03%/0.3% I OMAX MISCELLANEOUS Series/Parallel Operation Consult Kepco applications engineering. µ µ Leakage Current Common mode current: 5 A rms or 50 A p-p @ 115V a-c −...

  • Page 20: Mbt Series Power Supply, Mechanical Outline Drawing

    FIGURE 1-2. MBT SERIES POWER SUPPLY, MECHANICAL OUTLINE DRAWING MBTSVC111609 www.valuetronics.com...

  • Page 21: Features

    “G” option unit functioning as a “master”. In configurations with more than one MBT Series Power Supply, only one unit can have the “G” option enabled; if other “G” option units are used, the “G” option must be disabled.
  • Page 22 MBTSVC111609 www.valuetronics.com...

  • Page 23: Equipment Supplied

    Daisy chain MBT Power Supply and Kepco Power Supplies with 9-pin connector on IEEE 118-0853 1118 bus. Rack Adapter Allows rack mounting of two MBT Series Power Supplies in a standard 19-inch rack (see Figure RA 37 1-2). Filler plate...
  • Page 24 www.valuetronics.com...

  • Page 25: Section 2 - Installation

    SECTION 2 - INSTALLATION 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 Section 2.5. If any indication of damage is found, file an immediate claim with the responsible transport service.

  • Page 26: Mbt Series Front Panel Controls And Indicators

    FIGURE 2-1. MBT SERIES FRONT PANEL CONTROLS AND INDICATORS FIGURE 2-2. MBT SERIES INTERNAL CONTROLS ACCESSIBLE THROUGH TOP COVER MBTSVC 111609 www.valuetronics.com...
  • Page 27 These adjustments must be done in accordance with the calibration procedure (see PAR. 5.5 or refer to procedure avail- able at MBT front panel by entering MENU and selecting CALIBRATION (see PAR. 3.2.2.4). This switch is not included on some older models; refer to Kepco applications engineering for assistance in disabling the “G” option.
  • Page 28 TABLE 2-2. INPUT/OUTPUT PIN ASSIGNMENTS FOR REMOTE CONTROL CONNECTOR SIGNAL NAME FUNCTION SGND Signal Ground Receive Data Transmit Data ( not used) SGND Signal Ground RS232-C See Note. See Note. Clear To Send (protocol not used) SGND Signal Ground NOTE: Jumper installed beteen DSR and RTS allows secondary GPIB addressing if SCPI mode (see Table 2-4) is selected Not used SHIELD...

  • Page 29: Mbt Series Rear Panel Connections

    FIGURE 2-3. MBT SERIES REAR PANEL CONNECTIONS FIGURE 2-4. CONNECTOR PIN ASSIGNMENTS MBTSVC 111609 www.valuetronics.com...

  • Page 30: Preliminary Operating Procedures

    PRELIMINARY OPERATING PROCEDURES After the unit is unpacked, and before the unit is installed, the following procedure is required to set the node address. 2.5.1 NODE ADDRESS (CHANNEL NUMBER) SELECTION The node address is set by Node Address selector DIP switch A3S1 accessed through the top cover (see Figure 2-2).

  • Page 31: Preliminary Operational Check

    STATUS VOLTAGE CURRENT POLARITY REMOTE OUTPUT MODE MODE REVERSED ENABLED KEPCO, INC. MBT 100-3.6MGR 2. After approximately 2 seconds, the display changes to: STATUS NOTE: ***V and ***A are the output volt- VOLTAGE CURRENT POLARITY REMOTE OUTPUT MODE...
  • Page 32 6. Press slew keys, first then ; verify that beeps are heard and displayed programmed voltage increases when , is pressed and decreases when is pressed. 7. Press Vadj key, then enter a numeric value within the voltage range of the power supply and press ENTER key.

  • Page 33: Installation

    (Figure 2-2) to OFF. For “G” option models without this switch, contact Kepco Inc. or a local representative for assistance. If controller other than an MBT “G” option unit is used, disable the “G” option of all MBT units.

  • Page 34: D-C Output Grounding

    It is hoped that the preceding paragraphs will be of some assistance in most cases. For help in special applications or difficult problems, consult directly with Kepco's Application Engineering Department. 2.7.4...

  • Page 35: Load Connection - General

    Table 2-4 lists the location of the internal jumpers and their function. This information is provided for reference purposes only, to indicate the configuration options available. Do not attempt to alter the jumper configuration. For assistance in changing any jumper-selected parameter con- tact Kepco applications engineering. 2-11 MBTSVC 111609...

  • Page 36: Rs 232 Connections

    TABLE 2-4. INTERNAL JUMPER CONFIGURATION JUMPER JUMPER LOCATION FUNCTION DESCRIPTION INSTALLED INSTALLED J1-J5 MBT 6-32M (G) (R) J1-J4 MBT 15-20M (G) (R) J1-J3, J5 MBT 25-14M (G) (R) J1-J3 J4, J5 MBT 36-10M (G) (R) Establish the Model J1, J2, J4, J5 MBT 55-7M (G) (R) J1, J2, J4 J3, J5...

  • Page 37: Grounded Load Connections, Local Sensing

    FIGURE 2-5. GROUNDED LOAD CONNECTIONS, LOCAL SENSING FIGURE 2-6. ISOLATED LOAD CONNECTIONS, LOCAL SENSING 2-13 MBTSVC 111609 www.valuetronics.com...

  • Page 38: Grounded Load Connections, Remote Sensing

    FIGURE 2-7. GROUNDED LOAD CONNECTIONS, REMOTE SENSING FIGURE 2-8. ISOLATED LOAD CONNECTIONS, REMOTE SENSING 2-14 MBTSVC 111609 www.valuetronics.com...

  • Page 39: Section 3 - Operation

    SECTION 1 - SECTION 2 - SECTION 3 - OPERATION GENERAL The MBT Power Supply can be operated in either Local or Remote modes. Upon turn on, the Power Supply is in Local mode and restores the settings in place at previous turn off. The fac- tory default settings for Voltage and Current are 0, Voltage Mode selected and, for MR and MGR units, Non-reversed Polarity.

  • Page 40: Commanded Mode

    3.1.2 COMMANDED MODE Two commands are available from the keypad (either locally or remotely) or, in a different form, from a remote computer: Voltage mode and Current mode. After a Voltage mode command has been issued, the power supply is considered to be in commanded Voltage mode; after a Current command, the power supply is in commanded Current mode.

  • Page 41: Remote Mode

    In Remote Mode the power supply settings are controlled via the IEEE 1118 bus using either a computer with a Kepco controller or by another MBT unit operating in a remote configuration with one MBT unit operating as a controller (“G” option enabled) (see PAR. 1.4.2 and Figure 1- 3).
  • Page 42 TABLE 3-2. KEY FUNCTIONS REFERENCE FUNCTION DESCRIPTION PARAGRAPH Used to confirm or enter the input data of the parameter setting. ENTER ENTER Selects alternate function (screened in blue) of keys with dual func- tion capability. SHIFT key press indicated by blinking “ ”...
  • Page 43 TABLE 3-2. KEY FUNCTIONS (CONTINUED) REFERENCE FUNCTION DESCRIPTION PARAGRAPH Places power supply in Local Mode (front panel control) if the unit is 3.2.1.11.2 being operated remotely, otherwise this function is not operational. In Command SHIFT then Remote Lock mode (power supply controlled remotely), all Local LOCAL mode CLEAR ENTRY Mode functions, including Local Mode selection are inhibited (see...

  • Page 44: Keypad Operation

    STATUS VOLTAGE CURRENT POLARITY REMOTE OUTPUT MODE MODE REVERSED ENABLED KEPCO, INC. MBT 100-3.6MGR After approximately 2 seconds, the display changes to: STATUS NOTE: ***V and ***A are the output volt- VOLTAGE CURRENT POLARITY REMOTE OUTPUT MODE MODE...
  • Page 45 NOTES: A blinking “:” is represented by “ ” to indicate that the values displayed on the bottom line of the alphanumeric display are “live,” i.e., actual values at the power supply output. A blinking “sh” is represented by to indicate that the SHIFT key has been pressed, and the next key that is pressed will be interpreted with the alternate meaning.
  • Page 46 Press CLEAR ENTRY (LOCAL). Depending on the model, and whether the output is enabled or disabled, one of the following displays (A-D) will appear: NOTE: For explanation of symbols, see step 1 above. STATUS VOLTAGE CURRENT POLARITY REMOTE OUTPUT M, MG models with MODE MODE REVERSED...

  • Page 47: Enabling/Disabling Dc Output Power

    3.2.1.5 ENABLING/DISABLING DC OUTPUT POWER 3.2.1.5.1 M AND MG MODELS The DC OFF key will change the output voltage and current values to zero. The DC ON key restores the previous output voltage and current values if these settings were not changed via the keypad and/or VOLTAGE/CURRENT controls.

  • Page 48: Mr And Mgr Models

    3.2.1.5.2 MR AND MGR MODELS If the unit is in commanded Voltage mode, the DC OFF key electrically disconnects the output from the load; if the unit is in commanded Current mode, the DC OFF key short circuits the out- put.

  • Page 49: Setting Output Voltage Or Voltage Limit

    3.2.1.6 SETTING OUTPUT VOLTAGE OR VOLTAGE LIMIT There are three ways to set output voltage or voltage limit: 1) Vadj and numeric keys, 2) slew keys, and 3) the VOLTAGE control. The display should be reading either “Output is off” if the output is disabled, or “Keypad control”...

  • Page 50: Using Vadj And Numeric Keys - Mr, Mgr Models

    TABLE 3-3. USING VADJ AND KEYPAD ENTRIES TO SET OUTPUT VOLTAGE/VOLTAGE LIMIT — MODELS M, MG POWER SUPPLY STATUS BEFORE Vadj PRESSED EFFECT AFTER Vadj PRESSED OUTPUT ACTUAL MODE *** NUMERIC VALUE COMMANDED DISPLAY ENABLED/ (DICTATED BY SET BY KEYPAD MODE INDICATION DISABLED...

  • Page 51: Procedure Using Vadj And Numeric Keypad

    If the output is enabled, and the power supply is commanded to operate in Voltage mode, but < V forces the power supply to operate in current mode, the keypad entries adjust Prog Prog the actual voltage limit, contrary to the display indication. If the output is enabled, and the power supply is commanded to operate in Current mode, but ≥...
  • Page 52 Enter voltage value via key pad, e.g., 25.6. STATUS STATUS VOLTAGE CURRENT POLARITY REMOTE OUTPUT VOLTAGE CURRENT POLARITY REMOTE OUTPUT MODE MODE REVERSED ENABLED MODE MODE REVERSED ENABLED Volt limit = 25.6 Const Volt = 25.6 ###V ###A ###V ###A Press ENTER to confirm or CLEAR ENTRY to correct.
  • Page 53 TABLE 3-5. USING SLEW KEYS ( ) TO SET OUTPUT VOLTAGE/VOLTAGE LIMIT — MODELS M, MG POWER SUPPLY STATUS BEFORE SLEW KEY PRESSED SLEW KEYS ADJUST: COMMANDED OUTPUT ENABLED/ ACTUAL MODE *** MODE DISABLED (DICTATED BY LOAD) VOLTAGE DISABLED VOLTAGE***** Programmed output voltage VOLTAGE ENABLED...
  • Page 54 TABLE 3-6. USING SLEW KEYS ( ) TO SET OUTPUT VOLTAGE/VOLTAGE LIMIT — MODELS MR, MGR POWER SUPPLY STATUS BEFORE SLEW KEY PRESSED SLEW KEYS OUTPUT ADJUST: COMMANDED ACTUAL MODE ** ENABLED/ MODE (DICTATED BY LOAD) DISABLED VOLTAGE DISABLED VOLTAGE**** Programmed output voltage CURRENT Either DISABLED...

  • Page 55: Voltage Control - M, Mg Models

    3.2.1.6.6 VOLTAGE CONTROL — M, MG MODELS As described in PAR. 3.2.1.6.1 (M, MG Models) for the Vadj and numeric keys, the effect of the VOLTAGE control is dependent upon model, commanded mode, output enabled/disabled, actual mode, and the load. Table 3-7 (M, MG Models) summarizes the effect of the VOLTAGE control adjustments for dif- ferent conditions.

  • Page 56: Voltage Control - Mr, Mgr Models

    Current mode and the VOLTAGE control will adjust actual voltage limit. This will not be apparent from the display indication; to see the revised voltage limit it is necessary to view status by pressing SHIFT then (.) on the keypad. 3.2.1.6.7 VOLTAGE CONTROL —...

  • Page 57: Setting Output Current Or Current Limit

    If the output is enabled and the value of the load is less than the value of programmed voltage < V divided by programmed current (R ), the power supply operates in Current mode Prog Prog and the VOLTAGE control adjusts actual voltage limit. This will not be apparent from the display indication;...

  • Page 58: Using Iadj And Numeric Keys - Mr, Mgr Models

    TABLE 3-9. USING IADJ AND KEYPAD ENTRIES TO SET OUTPUT CURRENT/CURRENT LIMIT — MODELS M, MG POWER SUPPLY STATUS BEFORE Iadj PRESSED EFFECT AFTER Iadj PRESSED OUTPUT ACTUAL MODE *** NUMERIC VALUE COMMANDED DISPLAY ENABLED/ (DICTATED BY SET BY KEYPAD MODE INDICATION DISABLED...
  • Page 59 Table 3-10 (MR, MGR Models) summarizes the effect of the Iadj and numeric keys for different conditions. The first three columns reflect the status of the unit before the Iadj command is issued. The fourth column shows the message on the front panel display after the Iadj key is pressed and the fifth column shows how the adjustment will affect the status of the power sup- ply.

  • Page 60: Procedure Using Iadj And Numeric Keypad

    3.2.1.7.3 PROCEDURE USING IADJ AND NUMERIC KEYPAD Press Iadj. STATUS STATUS VOLTAGE CURRENT POLARITY REMOTE OUTPUT VOLTAGE CURRENT POLARITY REMOTE OUTPUT MODE MODE REVERSED ENABLED MODE MODE REVERSED ENABLED Output Curr = Curr limit = ###V ###A ###V ###A NOTES: indicates LED may be either on or off.

  • Page 61: Slew ( And ) Keys - Mr, Mgr Models

    TABLE 3-11. USING SLEW KEYS ( ) TO SET OUTPUT CURRENT/CURRENT LIMIT — MODELS M, MG POWER SUPPLY STATUS BEFORE SLEW KEY ADJUSTED SLEW KEYS OUTPUT ADJUST: COMMANDED ACTUAL MODE ** ENABLED/ MODE (DICTATED BY LOAD) DISABLED CURRENT * DISABLED VOLTAGE***** Programmed output current CURRENT *...

  • Page 62: Current Control - M, Mg Models

    3.1.1 and 3.1.2 for more details regarding commanded and actual mode of operation (either volt- age or current). TABLE 3-12. USING SLEW KEYS ( ) TO SET OUTPUT CURRENT/CURRENT LIMIT — MODELS MR, MGR POWER SUPPLY STATUS BEFORE SLEW KEY ADJUSTED SLEW KEYS OUTPUT ADJUST:...

  • Page 63: Current Control - Mr, Mgr Models

    The CURRENT control is not operational when the power supply is in Remote mode or when you enter the MENU (PAR. 3.2.2), PROGRAM REV/CHG (PAR. 3.2.1.11.1) functions, or when a program is running (PAR.s 3.2.1.11.3 and 3.2.1.11.5). Rotating the CURRENT control clockwise increases output current/current limit; counterclock- wise decreases output current/current limit.
  • Page 64 Table 3-14 (MR, MGR Models) summarizes the effect of the CURRENT control adjustments for different conditions. The first three columns reflect the status of the unit before the CURRENT control is adjusted. The fourth column shows how the adjustment will affect the status of the power supply.

  • Page 65: Setting Voltage Mode Or Current Mode

    it is necessary to view status by pressing SHIFT then (.) on the keypad). If the load forces the power supply to operate in Current mode, the CURRENT control adjusts actual output current. 3.2.1.8 SETTING VOLTAGE MODE OR CURRENT MODE Although all MBT Power Supplies automatically switch between Voltage mode and Current mode depending upon the programmed values for output voltage/current, the voltage/current limit values, and the value of the load (see PAR.
  • Page 66 Press SHIFT key; display resembles A or B below. NOTE: STATUS ***V and ***A are VOLTAGE CURRENT POLARITY REMOTE OUTPUT MR, MGR models with the output volt- MODE MODE REVERSED ENABLED Output disabled age and current Output is OFF (commanded) Current settings in effect Mode at time of last...
  • Page 67 greater than or equal to the programmed voltage divided by programmed current, the power supply will operate in Voltage mode (forced). Commanding the power supply to go into Current mode (with output disabled) from Voltage mode causes the output relays to put an internal short across the power supply output (allowing the load to be connected/disconnected).

  • Page 68: Reversing Dc Output Polarity - Mr, Mgr Models

    Press Iadj key to command the power supply to go into Current mode.; the display will briefly display the message shown below:, then return to the “Output is OFF” or “Key- pad Control” message displayed before the SHIFT key was pressed. STATUS VOLTAGE CURRENT...

  • Page 69: Changing The Gpib Address

    b. If changing from reversed to non-reversed, the display briefly shows STATUS NOTE: ###V and ###A represent VOLTAGE CURRENT POLARITY REMOTE OUTPUT either actual power supply MODE MODE REVERSED ENABLED output voltage and current Polar Nonrevrsed (output enabled) pro- grammed output and limit val- ###V ###A ues (output disabled).

  • Page 70: Local Mode Programming Of The Power Supply

    LOCAL MODE PROGRAMMING OF THE POWER SUPPLY The Local mode programming feature of the MBT Series Power Supply allows up to ten sepa- rate programs (0 to 9) to be set up via the keypad. Each program is a series of commands (steps) which are set up prior to execution.
  • Page 71 TABLE 3-15. PROGRAMMING MODE SCREENS SCREEN FUNCTION DISPLAY Displays voltage and current settings. Pr#2 Stp: 0 Sc:0 Program number selected ***V ***A Stp: Step number NOTE: While programming mode Screen 0 Screen number screens are active (creating, chang- (Sc: 0) ing, or observing screens 0 through ***V Programmed voltage value...

  • Page 72: Entering Program Mode

    3.2.1.11.1 ENTERING PROGRAM MODE Press SHIFT key. (Blinking sh appears on display.) Press MENU ON/OFF (REV/CHG PROGRAM) key Rev/change PRG # ***V ***A NOTE: indicates that a blinking “:” will appear if output is enabled. Select a Program # (0 to 9) by pressing the corresponding number key. (It is not necessary to press ENTER.) a.
  • Page 73 The following step-by-step procedure explains how to enter a simple program to illustrate the programming technique. The program to be entered is shown in Table 3-17; the values are arbi- trary, for instructional purposes only. TABLE 3-17. SAMPLE PROGRAM (ASSIGNED PROGRAM #2) SCREEN 0 SCREEN 1 SCREEN 2 *...
  • Page 74 Enter 1 (it is not necessary to key in insignificant zeroes, e.g., for 0.010, key in .01). Const VOLT = 1 0.0V 0.00A NOTE: If you make a mistake entering the value, press ENTER to confirm the incorrect value, then repeat steps 5 and 6 to correct the voltage. This applies any time the wrong value is keyed.

  • Page 75: Running A Program

    14. If Voltage mode is already selected, proceed to step 15. To set Voltage mode, press SHIFT, then Vadj. (When Current mode is desired, press SHIFT, then Iadj.) 15. Press to display Sc: 3. Pr#2 Stp: 0 Sc:3 Pr#2 Stp: 0 Sc:3 Polar nonrevrsed Polar reversed...

  • Page 76: Modifying A Program

    the program is running, the display indicates the output voltage and current for each step (n) while it is being executed: NOTE: ###V ###A represent STATUS either actual power supply out- put voltage and current (output VOLTAGE CURRENT POLARITY REMOTE OUTPUT MODE MODE...

  • Page 77: Cycling A Program

    Then press SHIFT then (DEL STEP function), until display reads: Stp 0 End of program NOTE: If step 0 is deleted, the initial values for step 0 of a new program will be the same as the deleted step 0. 3.2.1.11.5 CYCLING A PROGRAM To cycle a program, first enter program mode and select a program.

  • Page 78: Exiting Program Mode

    3.2.1.11.7 EXITING PROGRAM MODE To exit Program Mode press CLEAR ENTRY after the program has been stopped (see PAR. 3.2.1.11.6). If the output is enabled when CLEAR ENTRY is pressed, the display reverts to “Keypad control” (PAR. 3.2.1.5.1, step 2). If the output is disabled when CLEAR ENTRY is pressed, the display reverts to “Output is off”...

  • Page 79: Sample Program Operation For M, Mg Models

    FIGURE 3-1. SAMPLE PROGRAM OPERATION FOR M, MG MODELS 3-41 MBTSVC111609 www.valuetronics.com...

  • Page 80: Sample Program Operation For Mr, Mgr Models

    FIGURE 3-2. SAMPLE PROGRAM OPERATION FOR MR, MGR MODELS 3-42 MBTSVC111609 www.valuetronics.com...

  • Page 81: Using The Menu System

    SECTION 321118217 - 3.2.2 USING THE MENU SYSTEM To enter the Menu, press the MENU ON/OFF Key. The functions listed in Table 3-18 are avail- able and can be displayed one at a time by pressing NEXT, or SHIFT then NEXT (PREVIOUS), to “navigate”...

  • Page 82: Remote Channel

    The display shows either “Controls unlocked” or “Controls locked;” use the slew keys to toggle between the two options. Press MENU ON/OFF to return to menu level; press it again to exit the menu system. 3.2.2.3 REMOTE CHANNEL This function is used to remotely control other power supplies from the front panel of an MBT power supply included in the remote configuration (see PAR.

  • Page 83: Remote Operation Using Keypad To Control Another Mbt Power Supply

    12. The functions available from the controlling power supply keypad are: Voltage Mode SHIFT then Vadj Current Mode SHIFT then Iadj Change Polarity SHIFT then DC OFF (for MR, MGR Models only) Output Enable DC ON Output Disable DC OFF Voltage Adjust Vadj, numeric, then ENTER Current Adjust...
  • Page 84 followed by NOTE: A blinking “:” is represented by “ ” to M1; M2; M3 indicate that the values displayed on ***V ***A the bottom line of the alphanumeric display are “live,” i.e., actual values at NOTE: the status LEDs above the dis- the power supply output.

  • Page 85: Calibration

    NOTE: You can now use the keypad of the controlling power supply to set parameters for the controlled power supply. However, the messages and values displayed in step 2 above are not valid at this time. These messages/values are stored in the buffer of the con- trolling power supply;...

  • Page 86: Slew Key Increments Set-Up

    NOTE: The OVP and OCP function is inoperative when the power supply is being controlled remotely (Remote mode). Remote operation automatically establishes the nominal val- ues of the power supply as the OVP and OCP values. When the power supply is sub- sequently placed in Local mode, the nominal values for OVP and OCP remain.

  • Page 87: Remote Display Blanking

    The MBT-G has 2 compatibilty modes, Off and ON. When selected to be ON, the unit is back- ward compatible with older Kepco products. When OFF, the unit is completely compatible with the 488.2 and SCPI standards. Table 3-19 below describes the differences.

  • Page 88: Command Language

    TABLE 3-19. MBT-G COMPATIBILITY MODES Function MODE 0 (OFF) MODE 1 (ON) Device Clear Does not reset power modules Resets all power modules Status Uses Status Instrument Registers Does not use Status Instrument Registers PON enable All status register enables are set to 0 All status register enables are set to 32767 syst:vers? returns 1997.0...

  • Page 89: General

    3.3.1 GENERAL Kepco MBT Power Supplies (Models MG and MGR, with the “G” option enabled) may be pro- grammed over a control bus using either SCPI (Standard Commands for Programmable Instru- ments) or CIIL (Control Interface Intermediate Language) commands. SCPI and CIIL provide a common language conforming to IEEE488.2 for instruments used in an automatic test system.

  • Page 90: String Parsing

    3.3.2.1 STRING PARSING When the MBT power supply is in listen mode, strings are accepted. When the host controller sends the last byte it can assert the EOI line to indicate the string is complete. The GPIB listener function automatically adds a LF to terminate the string input. The parsing software then pro- cesses the string and if there are valid commands, the power supply is updated with the new control input.

  • Page 91: Rs232-C Bus Protocol

    Refer to Figure 2-4 and Table 2-2 for RS232 connections. See PAR. 3.3.3.1 for a description of RS 232 implementation. Upon power-up, the RS 232 port provides the following message: KEPCO POWER SUPPLY CONTROLLER V.4.6;MBTG=6;PROGMODE=2 where V4.6 indicates the software Version number...

  • Page 92: Echo Mode

    FIGURE 3-3. RS 232 IMPLEMENTATION Only four control characters (characters between 00 and 1F ) are acknowledged by the power supply: • Carriage Return (CR, 0D • Line Feed (LF, 0A • Back Space (BS, 08 • Escape (ESC, 01B BS deletes the last character entered, with the exception of CR or LF characters.

  • Page 93: Xon Xoff Method

    3.3.4 PROGRAMMING TECHNIQUES TO OPTIMIZE POWER SUPPLY PERFORMANCE Kepco's auto-crossover digital supplies can operate in either voltage mode with current limit, or current mode with voltage limit. The operating mode is determined by the voltage and current commands received, as well as the load.

  • Page 94: Scpi Programming

    This will improve response time and reduce undesirable transients. For those power supplies that employ relays (Kepco's MBT with "R" option, MAT and MST) this will also increase the life of the relay.
  • Page 95 TABLE 3-24. SCPI COMMAND INDEX PAR. PAR. PAR. COMMAND COMMAND COMMAND REFERENCE REFERENCE REFERENCE *CLS MEAS:VOLT? B.11 STAT:QUES:ENAB? B.31 *ESE OUTP:[STAT] B.12 STAT:QUES:INST? B.32 *ESE? OUTP:[STAT}? B.13 STAT:QUES:INST1? B.33 *ESR? [SOUR]:CURR B.14 STAT:QUES:INST2? B.34 *IDN? [SOUR]:CURR? B.15 STAT:QUES:INST:ENAB, ? B.35, B.36 *OPC, *OPC? A.7, [SOUR]:CURR:TRIG...

  • Page 96: Program Message Structure

    ROOT : (colon) INITiate STATus [:IMMediate] :OPERation :CONTinuous :CONDition? :ENABle INSTrument [:EVENt]? :CATalog :PRESet :NSELect :QUEStionable :SELect :CONDition? :STATe :ENABle [:EVENt]? MEASure :INSTrument? [:SCALar] :ENB :CURRent? :ISUM :VOLTage? :INSTrument1? :ENB OUTPut :INSTrument2? [:STATe] :ENB [SOURce:] SYSTem VOLTage :COMMunication [:LEVel] :GPIB:ADDRess [:IMMediate] :SERial :TRIGgered...

  • Page 97: Keyword

    KEYWORD DATA SEPARATOR ROOT SPECIFIER DATA MESSAGE UNIT SEPARATOR MESSAGE UNIT SEPARATOR DATA DATA SEPARATOR ROOT SPECIFIER KEYWORD KEYWORD KEYWORD SEPARATOR QUERY INDICATOR MESSAGE TERMINATOR KEYWORD CURR:LEV 3.5;:OUTP ON;:CURR?<NL> MESSAGE UNIT FIGURE 3-5. MESSAGE STRUCTURE 3.3.5.4.1 KEYWORD Keywords are instructions recognized by a decoder within the MBT-G Power Supply, referred to as a “parser.”...
  • Page 98 IMMediate, EVENt, and OUTPut). The parser, however, is not sensitive to case (e.g., outp, OutP, OUTPUt, ouTPut, or OUTp are all valid). 3.3.5.4.2 KEYWORD SEPARATOR If a command has two or more keywords, adjacent keywords must be separated by a colon (:) which acts as the keyword separator (e.g., CURR:LEV:TRIG).

  • Page 99: Understanding The Command Structure

    <END> must be used. The combination <NL><END> terminator can be used for all data except binary data. NOTE: Kepco power modules require a message terminator at the end of each program mes- sage. The examples shown in this manual assume a message terminator will be added at the end of each message.

  • Page 100: Understanding The Command Structure

    e.g., meas2:volt? or meas:volt2? both measure output voltage of the power supply at node number 2. e.g., func3:mode volt or func:mode3 volt both set the power supply at node number 3 to commanded voltage mode. e.g., stat1:ques? or stat:ques1? or stat:ques:cond1? all read Questionable Register status of the power supply at node number 1.

  • Page 101: Program Message Syntax Summary

    3.3.5.8 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.

  • Page 102: Operational Status Register

    The power supply sets this bit for – MEAS:VOLT? 10,1 — The 10 is the number of digits and the 1 is the range. Since this capability is not implemented in Kepco power supplies, the Command Warning bit is set. –...

  • Page 103: Multiple Logical Instruments

    FIGURE 3-6. STATUS REPORTING STRUCTURE 3.3.5.9.4 MULTIPLE LOGICAL INSTRUMENTS The MBT-G power supply is a SCPI device that supports multiple logical instruments; it allows a choice between two methods of status reporting. The status reporting default upon powerup treats the unit as a single channel instrument. When multiple channels are in use, a SCPI com- pliant status structure can be selected which provides an INSTrument summary status register and an individual instrument ISUMmary for each logical instrument.

  • Page 104: Expansion Of Questionable Register For Multiple Logical Instruments

    STATus Questionable register for the selected channel. The contents of the STATus Question- able register can also contain the summary of all instruments as shown in Figure 3-7. The selection of the status reporting structure is controlled by the SYStem:SET SI (Instrument Structure) command, either SI0 (off) or SI1 (on).

  • Page 105: Scpi Program Example

    3.3.6 CIIL PROGRAMMING The CIIL command language is used on early models of Kepco power supplies and controllers. The command functions are included here for compatibility with other equipment programmed with CIIL commands. The CIIL command set for the MBT-G Power Supply is defined and explained in Appendix C.
  • Page 106 www.valuetronics.com...

  • Page 107: Section 4 - Theory Of Operation

    SECTION 4 - THEORY OF OPERATION INTRODUCTION The MBT Power Supply is a digitally controlled voltage and current stabilized d-c source with an automatic sharp crossover between the voltage and current mode of operation. The values for output voltage and current are set digitally (12-bit resolution), either locally using the front panel optical encoders and/or keypad entries, or remotely using an external computer interfaced through the IEEE 1118 digital bus.

  • Page 108: Current Source

    4.1.2 CURRENT SOURCE Similarly, if the Power Supply is programmed to operate as a current source with voltage limit, and the load resistance becomes larger than R (for example R in Figure 4-1) the MBT Power Supply will go into voltage limit, generating an Overload error message. With a load resistance smaller than R (for example R in Figure 4-1) the MBT Power Supply will operate...

  • Page 109: Voltage/Current Reference

    FIGURE 4-3. CURRENT COMPARISON EQUIVALENT CIRCUIT The current feedback is proportional to the flow of output current and is developed through a current sensing resistor R in series with the Output Terminal lead. The sensed voltage across is amplified differentially by the current sensing amplifier and then calibrated by a current full scale adjustment amplifier to a voltage signal of 0 to -5V.

  • Page 110: Voltage/Current Comparison Errors

    age or current buffer are sent over the IEEE 1118 bus by the Digital Control Board. These digital signals are also sent to the front panel display to refresh the displayed values of voltage and current. 4.1.7 VOLTAGE/CURRENT COMPARISON ERRORS The digital contents of the output voltage and current buffer are also used to make decisions regarding the dynamic time-out delay and issuing the corresponding error message.

  • Page 111: Response Time

    4.1.8.4 PATH FAULT PROTECTION The path fault protection circuit is activated if the connection between a power lead and corresponding sensing lead is interrupted or if the power and sens- ing leads are too long. The path fault detector monitors the voltage drop between the Power Supply output terminals (OUTPUT and COMMON) and the corresponding sense leads (OUT S and COM S).

  • Page 112: Retention Of Programmed Values

    4.1.10 RETENTION OF PROGRAMMED VALUES A non-volatile RAM located on the A3 Digital Control Board allows the MBT Power Supply to retain the last programmed values for voltage and current when the unit is turned off. When the unit is turned on, the last programmed values of voltage and current will be displayed on the front panel, along with the message Output is OFF.

  • Page 113: Mr, Mgr Models

    4.1.12.2 MR, MGR MODELS The “R” option units operate either as a commanded voltage source or a commanded current source. The actual mode, voltage or current, will depend on the pro- grammed values for output voltage and current and the value of the load (see NOTE above). Enabling or disabling the output differs from the voltage mode to the current mode.

  • Page 114: Set Output Current/Voltage Limit (Current Mode)

    4.1.13.2 SET OUTPUT CURRENT/VOLTAGE LIMIT (CURRENT MODE) When operating in the Cur- rent mode, output current can be set in three different ways: NOTE When the output is Disabled, the following controls affect the programmed output and limit values for voltage and current. 1.

  • Page 115: Status

    • Use the front panel to control the operating parameters of another Kepco Power Supply connected to the IEEE 1118 bus by entering the node address of the power supply to be controlled at the keypad.

  • Page 116: Mbt Series Block Diagram Circuit Description

    MBT SERIES BLOCK DIAGRAM CIRCUIT DESCRIPTION Figure 4-4 is a block diagram of the MBT Series Power Supply; Figure 4-5 provides the location of internal power supply components. Source power is routed through the rear panel AC INPUT connector A6J1, front panel POWER...
  • Page 117 4-11 MBTSVC111609 www.valuetronics.com...

  • Page 118: Detailed Circuit Descriptions

    +5V sent directly to A3 for isolated input/output circuits. DETAILED CIRCUIT DESCRIPTIONS The following paragraphs provide detailed circuit descriptions of the MBT Series Power Supply Circuits. Figure 4-5 shows the location of major components within the power supply; note that the chassis is designated A6, therefore reference designations for chassis-mounted compo- nents other than major assemblies (A1-A5, A7-A14) are prefixed by A6.

  • Page 119: Analog Control Board A1

    Digital Control Board A3 with the voltage and current feedback signals from the power section. This board also contains the detection portion of the protection circuits incorporated into the MBT Series Power Supply. This board is identical for all options of a particular model, however it differs between models due to a few components —...

  • Page 120: Relay And Flags Board A2

    the crowbar protection circuit which trips the main POWER circuit breaker, shutting off the MBT Power Supply. 4.3.2 RELAY AND FLAGS BOARD A2 (See Schematic Diagram, Figure 6-19 for Models M, MG, Figure 6-20 for Models MR, MGR) The main function of this board is to deliver all the flags necessary for Digital Control Board A3. On units with the "R"...

  • Page 121: Auxiliary Supply Board A4

    AUXILIARY SUPPLY BOARD A4 (See Schematic Diagram, Figure 6-22) Auxiliary Supply Board A4 generates voltages used by other circuits of the MBT Series Power Supply. This board is identical for all MBT models and options, and contains the following cir- cuits: •...

  • Page 122: Mother Board A5

    4.3.5 MOTHER BOARD A5 (See Schematic Diagram, Figure 6-23) Mother Board A5 provides interconnections between various power supply components and is identical for all MBT models and options. Boards A1, A2, A3, and A4 plug directly into connec- tors A5J3, A5J2, A5J1, and A5J4, respectively (see Figure 6-7 for component locations). Con- nector A5J5 provides connections to/from heat sink assemblies A7, A10 and (for MR and MGR units) the Relays Assembly;...

  • Page 123: Front Panel Board A8

    The pass element transistors and associated circuits are electrically connected to two printed circuit board subassemblies; the transistors are also physically mounted on the heat sink for heat dissipation (see Figure 6-8). Low voltage model heat sink assemblies are interconnected with chassis-mounted components, Mother Board A5, and Sensing Resistor and Crowbar assembly A10 by means of one 9-pin connector on printed circuit subassembly A7A1.

  • Page 124: Sensing Resistor And Crowbar Circuit A10

    wise rotation). Digital Control Board A3 then resets U3B to prepare for further movement of the control. “G” Option selector switch S1 routes IEEE1118 bus signals to/from the rear panel connector via Digital Control Board A3 (A3J1 to A8J9) to/from Interface Board A14 (A8J8 to A14J2) when the “G”...

  • Page 125: Single Board Computer (Sbc) A13 - Mg, Mgr Models (See Schematic Diagram

    "R" OPTION COMPONENTS — MR, MGR MODELS (See Schematic Diagram, Figure 6-20) MBT Series Power Supplies with the “R” option include a special Relay and Flags Board A2, and a Power Relay Assembly. These components function to allow the load to be electrically isolated from the power supply output (output disabled status), and permit reversing the polarity of the voltage applied to the load (refer also to PAR.s 4.1.11 through 4.1.13).
  • Page 126 3) When output voltage (Voltage mode) or output current (Current mode) reach zero, the relays are switched to the new position. 4) When the switching action is complete, the parameters stored in step 1 are restored. NOTE: The switching time of the output relays is approximately 500 microseconds; this must be taken into account when setting up a program which exercises the output relays.

  • Page 127: Appendix A - Scpi Common Command/Query Definitions

    APPENDIX A - SCPI COMMON COMMAND/QUERY DEFINITIONS INTRODUCTION This appendix defines the IEEE 488.2 common commands and queries used with the MBT Power Supply controller. Common commands and queries are preceded by an asterisk (*) and are defined and explained in Figures A-1 through A-14, arranged in alphabetical order. Table A- 1 provides a quick reference of all IEEE 488.2 common commands and queries used in the MBT power supply controller.

  • Page 128: Ese? - Standard Event Status Enable Query

    <Manufacturer>, <Model>, <Serial Number>, <Firmware revision> where: <Manufacturer> = KEPCO, <Model> = BOP, <Serial Number> = MM,DD,YY-SSS (MM - month, DD - day, YY - year, SSS - serial number in that day) <Firmware revision>=n.m (n.m revision, e.g, 1.0) (See example, Figure A-1.)

  • Page 129: Opc? - Operation Complete Query

    *ESR? Returns 32 (bit 5 set), indicating Command Error has occurred since the last time the register was read. *IDN? Controller returns character string: "KEPCO,MBT,1,V3.0-3.0" *OPC Allows status bit 0 to be set when pending operations complete VOLT 21;CURR 3...

  • Page 130: Rst - Reset Command

    *OPT? 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 Indicates unit has the ability to modify the DCL response. Indicates multiple channel device is enabled Display present, no text capability.

  • Page 131: Stb? - Status Byte Register Query

    *STB? A.13 *STB? — STATUS BYTE REGISTER QUERY Syntax: *STB? Response: <integer> value from 0 to 255 per Table A-3. Description: Reads Status Byte Register without clearing it. This Query reads the Status Byte Register (bit 6 = MSS) without clearing it (1 = set = function enabled, 0 = reset = function disabled). The register is cleared only when subsequent action clears all set bits.

  • Page 132: Tst? - Self Test Query

    *TST? A.15 *TST? — SELF TEST QUERY Syntax: *TST? Returned value: 0 or n (0 = pass test, n = fail test )where n = address of failed unit(s) Description: Power Supply test.This query causes the power supply to do a self test and provide the controller with pass/fail results.

  • Page 133: Appendix B - Scpi Command/Query Definitions

    APPENDIX B - SCPI COMMAND/QUERY DEFINITIONS INTRODUCTION This appendix defines the SCPI subsystem commands and queries used with the MBT Power Supply controller. Subsystem commands are defined in PAR. B.2 through B.54, arranged in groups as they appear in the tree diagram, Figure 3-4. Table B-1 provides a quick reference of all SCPI subsystem commands and queries used in the Interface Card.

  • Page 134: Initiate:continuous Command

    INIT:CONT INITiate:CONTinuous COMMAND Syntax: 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.

  • Page 135: Instrument[:Select] Command

    *RST Devices are located on the BITBUS (IEEE 1118) as noted above. INST:SEL 1;*IDN? Controller returns KEPCO,MBT,1,V4.2-3.0 (Channel 1 selected; device con- nected to BITBUS channel 1 is MBT 25-14, firmware version 3.0; MBT firmware version is 4.2). INST:NSEL 2;*IDN? Controller returns KEPCO,MST,2,V4.2-2.6 (Channel 2 selected;...

  • Page 136: Measure[:Scalar][:Voltage][:Dc]? Query

    MEAS:VOLT? B.11 MEASure[:SCALar][:VOLTage][:DC]? QUERY Syntax: Short Form: MEAS[:SCAL]:VOLT[:DC]? <boolean> Long Form: MEASure[:SCALar]:VOLTage[:DC]? <boolean> <boolean> = 0 or 1 Return Value: <num_value> (digits with decimal point and Exponent) Description: Measures actual voltage. This query returns the actual value of output voltage (measured at the out- put terminals) as determined by the programmed value of voltage and current and load conditions.

  • Page 137: Source:]Current:[:Level]Triggered[:Amplitude] Command

    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. 3.3.4 for pro- gramming techniques to optimize performance. OUTP ON Output enabled. OUTP? Power supply returns “1”...

  • Page 138: Source:]Voltage[:Level][:Immediate][:Amplitude] Command

    The VOLT? query returns the programmed value of voltage. Actual output voltage will depend on load conditions. The VOLT?MAX query returns the maximum voltage allowed for a particular model (e.g., 25V for Kepco’s MST25-8DM). VOLT? MINReturns minimum voltage allowed for power supply (always 0). Related Commands: VOLT. (See example, Figure B-3 VOLT:TRIG B.20 [SOURce:]VOLTage:[:LEVel]TRIGgered[:AMPlitude] COMMAND...

  • Page 139: Source:]Function:mode Command

    FUNC:MODE B.22 [SOURce:]FUNCtion:MODE COMMAND Syntax: Short Form:FUNC:MODE {VOLT | CURR} Long Form: FUNCtion:MODE {VOLT | CURR} Description: Establishes the operating mode of the power supply. VOLT = Constant Voltage mode (CV). CURR = Constant Current mode (CC). STAT:OPER:COND? B.23 STATus:OPERation:CONDition? QUERY Syntax: Short Form: STAT:OPER:COND? Long Form: STATus:OPERation:CONDition?

  • Page 140: Using Status Commands And Queries

    NOTE: The selected power supply is assumed to be operating in cV (constant voltage) mode. STAT:OPER:ENAB 1056 Mask enabled for CC, WTG and bits. STAT:OPER:ENAB? Returns 1056 (32 + 1024) (CC, WTG bits set). STAT:QUES:ENAB 3 Mask enabled for OV and OC bits (1 + 2). STAT:QUES:ENAB? Returns 3 (1 + 2) indicating OV and OC bits are enabled.
  • Page 141 TABLE B-3. QUESTIONABLE EVENT REGISTER, QUESTIONABLE CONDITION REGISTER AND QUESTIONABLE CONDITION ENABLE REGISTER BITS POWER LOSS CONDITION OVERLOAD RELAY ERROR OVERTEMPERATURE CURRENT ERROR VALUE 2048 1024 VOLTAGE ERROR NOT USED STAT:QUES:ENAB B.30 STATus:QUEStionable:ENABle COMMAND Syntax: Short Form: STAT:QUES:ENAB <int_value> Long Form: STATus:QUESionable:ENABle <int_value> Description: Programs Questionable Condition Enable Register (see Table B-3).The Questionable Condition Enable Register determines which conditions are allowed to set the Questionable Condition Register;...
  • Page 142 TABLE B-5. QUESTIONABLE INSTRUMENT REGISTER 1 BITS CONDITION INST2 VALUE 32768 16384 8192 4096 2048 1024 CHANNEL NOT USED INST1 INSTRUMENT REGISTER 1 STAT:QUES:INST2? B.34 STATus:QUEStionable:INSTrument2? QUERY Syntax: Short Form: STAT:QUES:INST2? Long Form: STATus:QUESionable:INSTrument2? Return Value: <int_value> actual register value Description: Reads Questionable Instrument Register 2 (see Table B-6).
  • Page 143 STAT:QUES:INST1:ENAB? B.38 STATus:QUEStionable:INSTrument1:ENABle? QUERY Syntax: Short Form: STAT:QUES:INST1:ENAB? Long Form: STATus:QUESionable:INSTrument1:ENABle? Return Value: <int_value> actual register value. Description: Reads Questionable Instrument Register 1 Enable Register (see Table B-3). Unit returns value of Questionable Instrument Register 1 Enable Register. STAT:QUES:INST2:ENAB B.39 STATus:QUEStionable:INSTrument2:ENABle COMMAND Syntax: Short Form: STAT:QUES:INST2:ENAB <int_value>...
  • Page 144 Description: This command allows the CIIL command language to be used to program the power supply. (CIIL is included to provide compatibility with earlier Kepco equipment.) Once CIIL is selected, the CIIL command ‘GAL’ followed by the command ‘SCPI’ must be sent for the power supply to respond to SCPI commands.

  • Page 145: System:set Command

    TABLE B-7. ERROR MESSAGES ERROR MESSAGE EXPLANATION No error 0,“No error” -100,“Command error” Command and data understood, but more information included which is not recognized. -102,”Syntax error” First 4 characters recognized, subsequent characters not recognized. For example, VOLT.10 received instead of VOLT:10 -103,”Invalid separator”...
  • Page 146 www.valuetronics.com...

  • Page 147: Appendix C - Ciil Command Definitions

    APPENDIX C - CIIL COMMAND DEFINITIONS INTRODUCTION This appendix defines the CIIL commands used with the MBT Power Supply. Table C-1 provides a quick reference of all CIIL commands used in the MBT Power Supply. TABLE C-1. CIIL SUBSYSTEM COMMAND/QUERY INDEX COMMAND PAGE COMMAND...

  • Page 148: Inx - Initiate Op Code Command

    Syntax: INX VOLT (initiate voltage reading) INX CURR (initiate current reading) Function: Commences a data acquisition process in accordance with the preceding FNC command. Description: The response to the INX command is a dynamic time-out value, unless a catastrophic error condition exists, in which case an error message will be returned.

  • Page 149: Set Command

    VOLT or CURR value so that the power supply's polarity may be selected. In the case of Kepco's MBT power supplies, the two related Op Codes, SRX and SRN are functionally identical to the SET command, since there is only one range, 0 - maximum. The commands are included only for compatibility.

  • Page 150: Opn, Cls - Open, Close Relay Commands

    OPN, CLS Syntax: OPN :CHnn CLS :CHnn Function: These commands are used to connect or disconnect the power supply from the load (effective for MR and MGR options only). Description: Disconnects the load from the power supply specified by the operand. Connects the load to the power supply specified by the operand.

  • Page 151: Sta - Status Command

    Syntax: Function: Causes power supply to return operating status to controller. Description: This operator commands the power supply to report its present operating status. Status is reported in the form of a message (character string) as defined below. Any catastrophic error conditions (indicated by * in the table below) which exist will be reported, until the error condition is corrected.

  • Page 152: Gal - Go To Alternate Language Command

    Syntax: Function: Enables utility commands which change error handling defaults. Description: This command enables the utility commands listed below. If no GAL command is issued, the default conditions are T0, F1, and P1. Once the GAL command is issued, the appropriate utility command may be sent to change the default condition.

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