BK Precision 9120A User Manual
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BK Precision 9120A User Manual

Single output programmable dc power supply
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Model: 9120A, 9121A, 9122A, 9123A, 9124, 9150, 9151, 9152, 9153
Single Output Programmable DC Power
Supply
USER MANUAL

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Summary of Contents for BK Precision 9120A

  • Page 1 Model: 9120A, 9121A, 9122A, 9123A, 9124, 9150, 9151, 9152, 9153 Single Output Programmable DC Power Supply USER MANUAL...

  • Page 2: Safety Information

    Safety information Please review the following safety precautions before operating our equipment. General information The following safety precautions should be observed before using this product and any associated instrumentations. This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1. Introduction ......................4 Description ............................... 4 Features ..............................4 2. Quick Reference ..................... 5 2.1 The Front Panel ............................5 2.2 The Rear Panel ............................6 2.3 Preliminary Checkout ..........................7 1. Check the list of supplied items......................7 2.

  • Page 4: Introduction

    1. Introduction Description Models 9120A, 9121A, 9122A, 9123A, 9124, 9150, 9151, 9152, and 9153 are fully programmable, linear DC Power Supplies that provide you with clean and reliable power, high resolution and accuracy combined with fast transient response times and excellent temperature stability. The front panel keys and the control knob provide a convenient interface for adjusting Voltage and Current, storing and recalling operating states or enabling/disabling the output.

  • Page 5: Quick Reference

    2. Quick Reference 2.1 The Front Panel For Models: 9120A, 9121A, 9122A, 9123A, 9124 For Models: 9150, 9151, 9152, 9153 VFD display Rotary knob Power switch Numeric keys, auxiliary. functions...

  • Page 6: The Rear Panel

    Function keys Up/Down keys and “Enter” key Output terminals Digital Voltmeter terminals (For Model 9150, 9151, 9152, 9153) 2.2 The Rear Panel For Models: 9120A, 9121A, 9122A, 9123A, 9124 For Models: 9150, 9151, 9152, 9153...

  • Page 7: Preliminary Checkout

    Digital Voltmeter terminals. (For models 9150, 9151, 9152, and 9153, these terminals are in the front panel) AC power inlet and fuse compartment Ventilation holes Quick connect terminal for Remote sensing and digital port functions (digital I/O, DFI/RI and ext. trigger) TTL interface connector for remote control AC Power selection switch (110 V / 220 V) 2.3 Preliminary Checkout...

  • Page 8: Output Verification

    The first row displays the actual output voltage value and current and the state of power supply. The second row displays the voltage measured by the DVM (on left) and the Set Value for the voltage of the power supply. To obtain additional information about the instrument, press and hold the SHIFT button during Power Up.

  • Page 9: Current Output Check

    Change the voltage setting if it’s not correct. 3. Verify that the correct power-line fuse is installed. 1.5.1 Fuse Replacement Model Fuse Description (110 VAC) Fuse Description (220 VAC) 9120A T2.5A 250V T1.25A 250V 9121A T2.5A 250V T1.25A 250V 9124 T2.5A 250V...

  • Page 10: Adjusting The Carrying Handle

    To adjust the position, grasp the handle by the sides and pull outward. Then rotate the handle to the desired position. Dimensions: 214.5 mm (W) x 88.2 mm (H) x 354.6 mm (D) all units in mm For Models: 9120A, 9121A, 9122A, 9123A, 9124...

  • Page 11: Rack Mounting The Instrument

    For Models: 9150, 9151, 9152, 9153 1.7 Rack Mounting the Instrument You can mount the power supply in a standard 19-inch rack cabinet using the IT-E151 rack mount kit. Note: Remove the carrying handle and the two plastic ears before rack-mounting the instrument. To remove the handle, grasp the handle on the side, pull outwards and rotate it to a special position where the arrow on the handle and the arrow on the plastic ears are in opposite directions.

  • Page 12: Front-Panel Operation

    To rack mount a single instrument, order rack mount kit IT-E151 To rack mount two instruments (models 9120A, 9121A, 9122A, 9123A, 9124 only) side-by-side, order rack mount kit IT-E151, In this case you don’t need to use the front cover panel.

  • Page 13: Numerical Keys/Secondary Shift Functions

    Numerical Keys/Secondary Shift Functions Shift Functions V/mΩ: Toggle between DVM and mΩ Meter mode 0.1 W: Set the range of the mΩ Meter to 0.1 W 1 W: Set the range of the mΩ Meter to 1 W 10 W: Set the range of the mΩ...

  • Page 14: Front-Panel Operation Overview

    ▼：Down key Enter: Press to confirm numerical entries 3.2 Front-panel Operation Overview The power supply at shipment is preconfigured for front-panel operation. At power-on, the power supply will automatically start up in front panel operation mode. When the power supply is in remote operation mode, the front-panel is disabled. You can revert to Local mode, by pressing the Local button or by sending the appropriate SCPI command.

  • Page 15: Menu Operation

    to assign and store the current settings to the selected memory location To recall a setting: Press the Recall key. Use the knob to scroll to the memory location where the settings you want to recall are stored. Press to recall and activate those settings You can also use the SCPI command:*SAV *RCL to save and recall respectively.
  • Page 16 None< Default > Even Address Set Set the communication address (range from 0 to 30) Address=＊＊ Port Mode Select mode of digital port Trigger< Def > RI/DFI Note: DFI is not available for models 9150, 9151, 9152, 9153 DIGITAL I/O Note: Digital output not available for models 9150, 9151, 9152, 9153 Trig Source...

  • Page 17: Menu Function

    2 X 100 Steps 1 X 200 Steps Exit Out On Timer Output timer. If Timer State is set to ON, power supply output will turn off after the timer elapsed. Timer State Setting POWER ON timer state Enable Output Timer. Output will turn off after value set in menu “Timer Set”...
  • Page 18 The Inhibit Input pin can be used to control the output state of the power supply (RI function). The Fault Output pin (DFI function) can be used to indicate internal faults of the power supply. NOTE: The Fault indicator function (DFI) is only available for models 9120A, 9121A, 9122A, 9123A, and 9124.

  • Page 19: Key Lock

    The signal applied to the RI port does not affect the output state of the power supply. Discrete Fault Interupt (DFI) - Output NOTE: Available for models 9120A, 9121A, 9122A, 9123A, and 9124A only. Used to indicate that a fault has occurred in power supply.
  • Page 20 Memory area Number of groups/ area Capacity/group 4KByte 2KByte 1KByte 512 Byte Example: Group C can store 4 groups, each group has a maximum capacity of 1KByte. The power supply executes a list in CONTINIOUS or Step mode. In CONTINIOUS mode, the power supply will start executing the list once.
  • Page 21 16） Press to set the list file, then press to run the list file. Press to stop. If you have created several list files, you can call the list file that you need by “Call ListFile” function in the List menu.

  • Page 22: Output Operation

    You must set remote sense mode before you start remote test function. Output pins For Models 9120A, 9121A, 9122A, 9123A, 9124: These pins are identical to the output terminals in the front. For Models 9150, 9151, 9152, 9153: These pins are the same as remote sense pins.

  • Page 23: Digital Volt Meter (Dvm)

    Digital output is not available for models 9150 to 9153. The status of the pin can be read via SCPI command. FLT: Fault Output pin (Available for models 9120A, 9121A, 9122A, 9123A, 9124 only) This pin has multiple functions: a) When “Port Mode” in the menu is set to “Trigger”, FLT has no function.

  • Page 24: Milliohm Meter

    By default, the power supply is in DVM mode. Press followed by V/mΩ to toggle between Voltmeter and mΩ Meter mode. The DVM integrated inside these power supplies is an added feature for the convenience of NOTE: monitoring voltages of a setup being powered by the same power supply with the DVM. It is not meant to be used as a standalone measuring unit.

  • Page 25: Remote Operation

    Measurement range 0.1 W 10 W Test voltage (Output) 3.3 V 10 V 4. Remote Operation The DB9 TTL interface connector on the rear panel of the power supply can be connected to a USB (virtual com) or GPIB (model 9123A only) interface via a serial converter cable. This chapter describes how to use a computer to control the output of the power supply.

  • Page 26: Communication Between Power Supply And Pc

    Power Supply Connect this connector to Connect this DB9 TTL side to your connector of computer’s power supply GPIB (serial cable interface included) (GPIB cable not included) Connect external AC power adapter (included) Recommended power up sequence: Connect the IT-E135 adapter to your computer and to the power supply as indicated in the above figure. Connect the external power adapter.

  • Page 27: Scpi Command Overview

    Parity=None Start Stop 8 Data Bits Parity=Odd, Start Parity Stop 8 Data Bits Even End of String character is ’\n’ (0x0a) DB9 Interface Details The DB9 connector in the rear panel of the power supply provides a TTL level signal .It can be connected to a standard PC interface via the IT-E132B isolated converter/adapter.

  • Page 28: Essential Scpi Commands

    *CLS *ESE *ESE? *ESR? *IDN? *OPC *OPC? *PSC *PSC？ *RST *SRE *SRE? *STB? *TRG *SAV *RCL Essential SCPI Commands SYSTem :ERRor[:NEXT]? :VERSion?, :ADDRess? :REMote :LOCal :RWLock STATus :QUEStionable [:EVENt]? :CONDition? :ENABle <VALUE> :ENABle? :OPERation :[EVENt]? : CONDition? :ENABle <VALUE> :ENABle? Calibration Command CALibration :SECure...
  • Page 29 Output Commands OUTPut [:STATe] {<bool>} [:STATe]? :TIMer [:STATe] {<bool>} [:STATe]? :DATA {<timer>} :DATA? [SOURce:] MODE {<FIXed|LIST|DRM>} MODE? VOLTage [:LEVel] {<n>} [:LEVel]? :PROTection :STATe {<bool>} :STATe? [:LEVel] {<n>} [:LEVel]? CURRent [:LEVel] {<n>} [:LEVel]? LIST :MODE {<mode>} :MODE? :STEP {<step>} :STEP? :COUNt {<n>} :COUNt? :CURRent [:LEVel] {<n>,<n>}...

  • Page 30: Port Configuration Commands

    Port Configuration Commands [SOURce:] SYSTem : SENSe [:STATe] {<bool>} [:STATe]? PORT :FUNCtion {<TRIGger|RIDFi|DIGital>} : FUNCtion? :MODE {<OFF|LATChing|LIVE>} :MODE? :SOURce {<OFF|QUES|OPER|ESB|RQS>} :SOURce? DIGital :OUTPut[:STATe] {<bool>} :INPut[:STATe]? SENSe :RESistance: :RANGe {LOW | MIDdle | HIGH>} :RANGe? Trigger Command TRIGger [:IMMediate] :SOURce {<source>} SCPI Condition Register You can obtain the state of the power supply and read parameters from the operation register.

  • Page 31: Scpi Command Description

    If a standard event status enable register changes, ESB is 1. OPER If a operation event enable register changes, OPER is 1. Structure of condition register: Quest condition register condition event enable n.u. n.u. Operation event register Status byte register condition event enable event enable QUES...
  • Page 32 This command reads information about the power supply. The return value contains 4 segments divided by a comma. Query syntax: *IDN? Parameter: None Return parameter: <AARD> segment description BK Precision manufacturer XXXX product mode XXXXXX product serial number VX．XX software version number For example: BK PRECISION，9120A，000004，V1.01...
  • Page 33 *OPC When all commands sent to the instrument prior to this command have been executed, OPC of the standard event status register will be set to 1. Command syntax: *OPC Parameter: None Query syntax: *OPC? Return parameter: <NR1> *PSC This command controls whether or not the power supply sends when it is reset. 1 OR ON: When power supply is reset, operation event enable register, query event enable register and standard event status register are all reset.

  • Page 34: Essential Scpi Commands

    Parameter: None Return parameter: <NR1> Reference command: *CLS *ESE *ESR Bit map of the standard event status enable register Bit Position Bit Name OPER no use QUES no use no use no use Bit Value *TRG When the power supply’s trigger source is set to Bus command, this command will generate a trigger signal. Its function is identical to the [SYSTem:]TRIGger command.
  • Page 35 (110) Rxd error Parity Error EEPROM Config data error Error Calibration data Factory Data error Command syntax: SYST:ERR? Parameter: None Return parameter: <NR1>, <SRD> SYSTem:VERSion? This command queries the software vers i on. Command syntax: SYST:VERS? Parameter: None Return parameter: <NR2> SYSTem:ADDRess? This command queries the address of the power supply Command syntax: SYST:ADDR?
  • Page 36 STATus:QUEStionable:CONDition? This command queries the parameters of the quest condition register. When a bit of the quest condition changes, the corresponding bit value in the quest event register will be set to 1. Query syntax：STATus:QUEStionable: CONDition? Parameter：None Return parameter：<NR1> STATus:QUEStionable:ENABle This command sets the parameter of the quest event enable register.

  • Page 37: Output Commands

    Output Commands OUTPut[:STATe] This command sets the power supply output on or off. Command syntax: OUTPut[:STATe] <bool> Parameter: 0|1|ON|OFF *RST value: OFF Query syntax: OUTPut:STATe? Return parameter: 0|1 Usage: If output timer is required, send command OUTPUT:TIMER ON first, then set OUTPUT ON. These two commands must be set in this order to function properly.

  • Page 38: List File Commands

    [SOURce:]CURRent [:LEVel] This command sets the current value of the power supply. Command syntax: [SOURce:]CURRent [:LEVel] <NRf> Parameter: MIN TO MAX|MIN|MAX Unit: A mA *RST value: MIN Example: CURR 3A， CURR 30mA， CURR MAX， CURR MIN Query syntax: [SOURce:]CURRent [:LEVel]? Parameter: [MIN|MAX] Example: CURR? , CURR? MAX, CURR? MIN Return parameter: <NR2>...
  • Page 39 [SOURce:]LIST:STEP This command sets the operation mode of the list file. ONCE List operate once REPeat Repeat list operation Command syntax: [SOURce:]LIST:STEP <SRD> Parameter: ONCE|REPeat Query syntax: [SOURce:]LIST:STEP? Return parameter: <CRD> Note to usage: When setting to LIST:STEP REPEAT, the list would run repeatedly for an indefinite amount of time. Below is an example set of commands to setup a repeated list properly: *IDN? PORT:FUNCTION TRIGGER...
  • Page 40 Command syntax: [SOURce:]LIST:VOLTage [:LEVel] <NRf> Parameter: 0~360V Unit: V mV Example: LIST:VOLT 1,3V; Query syntax: [SOURce:]TRANsition: VOLTage:TLEVel? Parameter: None Example: LIST:VOLT? ; Return parameter: <NR2> [SOURce:]LIST:WIDth This command sets the minimum step time. Decimal fractions are not allowed for this command. Units are in seconds or milliseconds, which are set using LIST:UNIT command (see LIST:UNIT).
  • Page 41 Example: LIST:SAV 1 [SOURce:]LIST:UNIT This command sets the unit for the list width in either seconds (SECOND) or milliseconds (MSECOND). Command syntax: [SOURce:]LIST:UNIT <second> Parameter: SECOND or MSECOND Example: LIST:UNIT SECOND Measurement commands Note: All measurement commands have units in Volts (V), Ampere (A), or Watts (W). Decimal fractions are allowed.

  • Page 42: Interface Configuration Commands

    MEASure[:SCALar]:RESistance[:DC]? This command queries the resistance reading of the milliohm meter. Command syntax: MEASure[:SCALar]: RESistance? Parameter: None Return parameter: <NR2> Return parameter unit: Ohm Example: MEAS:RES? Interface Configuration Commands [SOURce:]SYSTem:SENSe [:STATe]{<bool>} This command enables/disables the power supply’s remote sense function. Command syntax: SYSTem: SENSe [:STATe] <bool>...

  • Page 43: Trigger Commands

    [SOURce:]DIGital:INPut[:STATe]? This command sets the input state of port. This command can be used when the mode of the port is set to DIGITAL. Command syntax: SOURce:DIG:INPut[:STATe] ? Trigger commands TRIGger[:IMMediate] When trigger source is command mode, this command will give a trigger signal. Its function is as the same as *TRG command.
  • Page 44 TRIGGER...

  • Page 45: Specifications

    5. Specifications 5.1 Specifications Models 9120A, 9121A and 9124 Parameter 9120A 9121A 9124 Voltage 0 - 32 V 0 - 20 V 0 - 72 V Output Ratings Current 0 - 3 A 0 - 5 A 0 - 1.2 A ( 0 °C~40 °C)
  • Page 46 Voltage 0 - 60 V 0 - 30 V Output Ratings Current 0 - 2.5 A 0 - 5 A ( 0 °C~40 °C) LVP* 0 - 61 V 0 - 31 V Voltage Load Regulation <0.01％+2 mV (％of output+offset) Current <0.05％+0.5 mA <0.05％+1.5 mA...

  • Page 47: Supplemental Characteristics

    Load Regulation Voltage <0.01% + 2 mV <0.01% + 1 mV <0.01% + 1 mV (%of output+offset) Current <0.1% + 10 mA <0.1% + 5 mA <0.1% + 2 mA Voltage <0.02% + 0.1 mV <0.02% + 1 mV <0.02% + 1 mV Line Regulation (%of output+offset) Current...
  • Page 48 AC Input Ratings (selectable via switch on the rear panel) 220 AV±10%，47～63 Hz 110 AV±10%，47～63 Hz Maximum output power 9122A 9123A 9150 9151 9152 9153 9120A 9121A 9124 150 W 150 W 312 W 540 W 540 W 540 W 96 W...

  • Page 49: Service Information

    SERVICE INFORMATION Warranty Service: Please go the support and service section on our website www.bkprecision.com to obtain a RMA #. Return the product in the original packaging with proof of purchase to the address below. Clearly state on the RMA the performance problem and return any leads, probes, connectors and accessories that you are using with the device.
  • Page 50 22820 Savi Ranch Parkway Yorba Linda, CA 92887 www.bkprecision.com © 2010, 2009 B&K Precision Corp. Printed in China v020416...

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