BK Precision 9185 User Manual
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BK Precision 9185 User Manual

Programmable dc power supplies
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Model: 9171, 9172, 9173, 9174, 9181, 9182,
9183, 9184, 9185
Programmable DC Power
Supplies
USER MANUAL

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Summary of Contents for BK Precision 9185

  • Page 1 Model: 9171, 9172, 9173, 9174, 9181, 9182, 9183, 9184, 9185 Programmable DC Power Supplies USER MANUAL...

  • Page 3: Safety Summary

    Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation, service, and repair of this instrument. Before applying power, follow the installation instructions and become familiar with the operating instructions for this instrument. If this device is damaged or something is missing, contact the place of purchase immediately.
  • Page 4 KEEP AWAY FROM LIVE CIRCUITS Instrument covers must not be removed by operating personnel. Component replacement and internal adjustments must be made by qualified maintenance personnel. Disconnect the power cord before removing the instrument covers and replacing components. Under certain conditions, even with the power cable removed, dangerous voltages may exist.
  • Page 5 A CAUTION statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in damage to or destruction of part or all of the product. WARNING: Do not alter the ground connection. Without the protective ground connection, all accessible conductive parts (including control knobs) can render an electric shock.
  • Page 6 Compliance Statements Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems) This product is subject to Directive 2002/96/EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment (WEEE) , and in jurisdictions adopting that Directive, is marked...

  • Page 7: Ce Declaration Of Conformity

    CE Declaration of Conformity The power supplies models 9171, 9172, 9173, 9174, 9181, 9182, 9183, 9184, 9185 meet the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnet Compatibility Directive with the following standards. Low Voltage Directive EN61010-1: 2001 Safety requirements for electrical equipment for measurement, control, and laboratory use.

  • Page 8: Safety Symbols

    Safety Symbols Refer to the user manual for warning information to avoid hazard or personal injury and prevent damage to instrument. Chassis (earth ground) symbol. On (Power). This is the In position of the power switch when instrument is ON. Off (Power).

  • Page 9: Table Of Contents

    Table of Contents General Information ............1 1.1 Product Overview ..............1 1.2 Package Contents ..............2 1.3 Front Panel Overview............3 Front Panel Description ..............5 1.4 Rear Panel Overview ............6 Rear Panel Description ..............8 1.5 Optional Accessories ............8 Interface Card Options ..............
  • Page 10 3.1 Menu Options ..............28 How to Access the Menu ............. 29 3.2 Remote Interface Setup ............. 32 USB Interface (virtual COM) ............32 GPIB Interface ................34 Ethernet (LAN) Interface ............. 34 RS-232 and RS-485 Interface (Optional) ........35 3.3 Adjusting LCD Display, Key Lock, Key Sound ......
  • Page 11 3.10 Save/Recall Output Settings ..........68 3.11 Sequence Program Mode ..........71 3.12 External Analog Control ............. 72 3.13 Digital I/O ................77 INPUT ..................79 OUTPUT ..................80 3.14 Display Errors ..............81 3.15 Connecting in Series and Parallel ........82 Remote Operation ..............
  • Page 12 Voltage Calibration ..............163 External Analog Input Calibration..........165 Index ................... 170 SERVICE INFORMATION ............171 LIMITED THREE-YEAR WARRANTY ......... 172...

  • Page 13: General Information

    1 General Information 1.1 Product Overview The 917x and 918x series are high-performance dual range linear DC power supplies that provide clean and reliable power with high resolution and accuracy. All models are programmable via standard interface or optional RS232, GPIB and LAN interface. Interface cards and I/O cards come in a modular form factor.

  • Page 14: Package Contents

    1.2 Package Contents Please inspect the instrument mechanically and electrically upon receiving it. Unpack all items from the shipping carton, and check for any obvious signs of physical damage that may have occurred during transportation. Report any damage to the shipping agent immediately.

  • Page 15: Front Panel Overview

    1.3 Front Panel Overview 11 8 Figure 1 - Front Panel for 9171/9172/9181 7 11 8 Figure 2 - Front Panel for 9173/9174...
  • Page 16 7 11 8 Figure 3 - Front Panel for 9182/9183 7 1 1 8 Figure 4 - Front Panel for 9184/9185...

  • Page 17: Front Panel Description

    Front Panel Description Power ON/OFF button LCD display Esc / CLR button Menu button ISET button VSET button Decimal/LCL(Local) button Numeric keypad RCL (Recall) button OVP indicator OCP indicator RMT (Remote mode) indicator LOCK (Key lock) indicator Enter button Up, Down arrow keys Left, Right arrow keys Output button (Dual channel models have CH1 and CH2 output buttons)

  • Page 18: Rear Panel Overview

    1.4 Rear Panel Overview Figure 5- Rear View for 9171/9172/9181 Figure 6- Rear View for 9173/9174...
  • Page 19 Figure 7- Rear View for 9182/9183 Figure 8- Rear View for 9184/9185...

  • Page 20: Rear Panel Description

    Rear Panel Description S1 interface slot (shown with optional LAN/GPIB interface card) S2 interface slot (shown with optional DIO/Analog interface card) USB interface Temperature controlled cooling fan(s) AC input fuse box Line input receptacle Rear panel outputs (++/--) and sense (+S/-S) terminals Shorting pins Line voltage selection switch (bottom of power supply) See “2.2Line Voltage Selection”...

  • Page 21: Rack Mount Options

    Rack mount Options Rackmount kits are available for all 9 models. Refer to the following to determine your power supply rack mount size. 2U size: Models 9171, 9172, 9181 3U size: Models 9173, 9174, 9182, 9183, 9184, 9185 Model Description...

  • Page 22: Display Description

    5 . 000 V1 . 000 A CH1CV 5 . 000 V1 . 000 A CH2CV Figure 10- Dual Channel Main Display Display Description Output Mode (CV, CC, OFF) Voltage display (When output is OFF, it shows VSET voltage. When output is ON, it shows measured voltage) Current display (When output is OFF, it shows ISET current.

  • Page 23: How To Install Interface Cards

    Adds RS-485 interface for multi power supply control Option 5: RS232 Card Adds RS-232 interface How to Install Interface Cards 1. Power off the instrument and disconnect the AC power cord in the rear panel. Remove the back faceplate covering the S1 or S2 slot in the rear panel by removing the two screws on each side.

  • Page 24: Removing Interface Cards

    both sides. Slide the card down carefully. When it touches the 48-pin connector, slowly push the card all the way in until the panel of the interface card aligns with the rear panel of the power supply. Interface card 4. Place the two screws to tighten and secure the installed card. 5.

  • Page 25: Rackmount Installation

    19-inch rack fitting. Models 9171, 9172, 9181: Follow instructions for 2U rackmount installation. Models 9173, 9174, 9182, 9183, 9184, 9185: Follow instructions for...
  • Page 26 Step 1: Remove the parts 2 3 4 Step 3 Step 1 Step 3: Fas ten the parts Step 2 Step 4 Step 4: Fas ten the parts Step 2: Remove the parts Figure 11- 2U Single Supply Rackmount Installation...
  • Page 27 Step 1: Remove the parts Step 2: Fasten the parts Step 1 Step 2 Step 3 Step 4 Step 3: Remove the parts Step 5 Step 4: Fasten the parts Step 5: Remove the parts Step 6 Step 6: Step 7 Fasten the parts Step 7: Fasten the parts...
  • Page 28 Step 1: Rem ove th e parts Step 3 Step 1 Step 3: Fas ten the p arts Step 4 Step 2 Step 4: Fas ten th e parts Step 2: Rem ove th e parts Figure 13- 3U Single Supply Rackmount Installation...
  • Page 29 Step 1: Remove the parts Step 2: Step 1 Fasten the parts Step 2 Step 3 Step 4 Step 3: Remove the parts Step 5 Step 4: Fasten the parts Step 5: Step 6 Remove the parts Step 7 Step 6: Fasten the parts Step 7: Fasten the parts...

  • Page 30: Getting Started

    2 Getting Started 2.1 Input Power and Fuse Requirements Input Power The rated AC input power source for powering the supplies must be within: 115V Operation:103.5V-126.5V 230V Operation: 207V - 253V Frequency:47 Hz – 63 Hz Before connecting to an AC outlet or external power source, be sure that the power switch is in the OFF position and verify that the AC power cord, including the extension line, is compatible with the rated voltage/current and that there is sufficient circuit capacity for the...

  • Page 31: Line Voltage Selection

    Table 1- Input Fuse Table Model 115 V AC 230 V AC 9171 2.5 A 1.25 A 9172 2.5 A 1.25 A 9173 9174 9181 3.15 A 1.6 A 9182 2.5 A 9183 9184 9185 Note: All fuses listed have the specifications: T250V, slow blow (slow acting), 5 x 20mm.
  • Page 32 Step 1 - Check and/or Change Fuse Locate the fuse box next to the AC input connector in the rear panel. With a small flat blade screwdriver, insert into the fuse box slit to pull and slide out the fuse box as indicated below. Check and replace fuse (if necessary) for the desired line voltage operation (see Table 1).

  • Page 33: Output Connections

    WARNING: Do not connect power to the instrument until the line voltage selection is setup correctly. Applying an incorrect line voltage or configuring the line voltage selection improperly may damage the instrument and void all warranty. 2.3 Output Connections These power supplies have both front panel binding posts and rear panel terminals for output connections, and they are paralleled together.
  • Page 34 For 10 A or higher current output Rear Panel Output Front Panel Output +S + + - - - S Remove shorting bars WARNING: DO NOT output 10 A or more with only one pair of (+) and (-) terminals. Both (+) and (-) terminals must all be connected for applications requiring more than 10 A output.

  • Page 35: Preliminary Check

    WARNING: Before connecting wires to the front or rear panel output terminals, turn OFF the power supply to avoid damage to the instrument and the device under test (DUT). For safety, load wires must have a wire gauge size large enough to prevent overheating when the power supply operates at maximum short circuit output current.
  • Page 36 SRAM TEST ....MAIN TEST ....OK CHECKING FOR EEPROM DATA CHECKING FOR OPTION CARD .

  • Page 37: Output Check

    Output Check Voltage Check Follow the steps below to check basic voltage output with no load connected. 1. Turn on the power supply. The display will show the OFF annunciator next to the setting voltage on the left side of the display.
  • Page 38 Current Check Follow the steps below to check basic current output of the power supply. 1. Turn on the power supply. The display will show the OFF annunciator next to the setting voltage on the left side of the display. 2.

  • Page 39: Check Model And Firmware Version

    7. Press to turn off the power supply and remove the POWER short on the output terminals. Check Model and Firmware Version The model and firmware version can be verified from one of the boot up screens, or from using the *IDN? query remote command, described in “4.2 Remote Commands”.

  • Page 40: Front Panel Operation

    3 Front Panel Operation 3.1 Menu Options All settings and parameters can be configured from the built-in menu system of the power supply. To access the menu, press Menu The menu system is divided into 8 categories and organized as follows: 1.

  • Page 41: How To Access The Menu

    • Low Current Mode (ON,OFF)** 3. PROTECTION 1. OVP SETTING • OVP (ON,OFF) • SET (0 – Max. Voltage) 2. OCP SETTING • OCP (ON,OFF) • SET (0 – Max. Current) 4. MEMORY SETTING(0-9) 5. PROGRAM MODE 6. TIMER FUNCTION •...
  • Page 42 1. From the front panel, press to enter the main menu Menu and the below screen will display. The on the bottom right indicates that there are more categories below that can be displayed. 1 . SYSTEM SETTING 2 . OUTPUT SETTING 3 .
  • Page 43 keys to select the setting you want to change. Below is an example of the Remote settings being selected. Note the underline below the first character of the setting “USB”. REMOTE GPIB ADDR KEY LOCK 5. Settings have selectable options that are not numeric (i.e. REMOTE settings shown above).

  • Page 44: Remote Interface Setup

    3.2 Remote Interface Setup The standard remote interface available on all models in the series is the USB (virtual COM) interface. Other optional supported interfaces such as GPIB, Ethernet (LAN), RS-232, and RS-485are available, but dependent on the interface card(s) installed on the instrument.
  • Page 45 2. Install the USB driver. Visit www.bkprecision.com download the driver. Run the setup executable after unzipping the downloaded file. Note: Do this before connecting the USB cable from the power supply to the PC. 3. Once the installation is successful, connect the USB cable between the power supply and the PC.

  • Page 46: Gpib Interface

    GPIB Interface GPIB interface is available when the LAN/GPIB card is installed in the “S1” or “S2” slots in the rear panel. To setup the power supply for GPIB interface, follow the steps below: to enter SYSTEM SETTING. Select 1. Press , then Menu REMOTE and press...

  • Page 47: And Rs-485 Interface (Optional)

    3. If STATIC is selected, then select IP ADDRESS and use the numerical keypad to enter the static IP. After entering each group of 3 digits, press to go to the next group. The Enter cursor will automatically move to the next group. Do this until all 12 digits are entered.
  • Page 48 BAUDRATE: 57600 PARITY: NONE DATA BITS: 8 STOP BIT: 1 FLOW CONTROL: NONE RS-485 Interface Multiple power supplies (up to 31) can be connected together in series and be controlled via USB (virtual COM) interface. Here is an illustration of how the setup will look like: Figure 15- RS-485 Setup to Control Multiple Supplies (USB) To setup and configure the power supplies, follow these steps: Requirements:...
  • Page 49 Note:The cables are used to link the power supplies together. It is recommended to keep the cables as short as possiblebetween each unit. Communicate via USB 1. Take one Ethernet CAT5 cable and connect one end to labeled “OUT” on the RS485 interface card of the first power supply (the one that will be connected to the PC via USB cable).
  • Page 50 7. With the connections setup properly, on the first power supply, press , then to enter SYSTEM SETTING. Menu Select REMOTE and verify that “USB” is selected. Press Enter to save changes. 8. Press once to go back to the main menu and press to enter CHAIN SETTING.

  • Page 51: Adjusting Lcd Display, Key Lock, Key Sound

    3.3 Adjusting LCD Display, Key Lock, Key Sound LCD Backlight Timer The LCD backlight has a timer that can be set to dim its brightness within a set time from when the instrument is idle. To set this: to enter SYSTEM SETTING. Select 1.

  • Page 52: Disabling Key Sound

    Options Description Default Lock keypad 2. Press to save changes. Press twice to exit the Enter menu. 3. If ON is selected, all keys from the front panel, except , will be locked. The Lock LED indicator will be lit. 4.

  • Page 53: Restore To Factory Default

    3.4 Restore to Factory Default All instrument settings can be reset back to their factory default values by doing the following: WARNING: Restoring the instrument to factory default will change all current instrument settings and parameters back to their default values. 1.
  • Page 54 with NO marked by the 3. To cancel this action, press Enter cursor. To confirm resetting the instrument to factory default, to select YES and press press Enter 4. After approximately 5 seconds, the instrument will automatically jump back to the normal display. All settings are now set back to their factory default values.

  • Page 55: Configure Voltage And Current Output

    3.5 Configure Voltage and Current Output Voltage and Current Limit Settings The power supply has software voltage and current limit protection settings that can be configured to limit the settable range for output from front panel or remote operation. Follow the steps in this section to adjust these settings.
  • Page 56 VOLT LIMIT MAX = _20.400 V VOLT LIMIT MIN CH2 VOLT LIMIT MAX = _20.400 V CH2 VOLT LIMIT MIN = _ 0.000 V Current Limit Set to enter OUTPUT SETTING. Press 1. Press , then Menu to select CURR LIMIT SETTING. 2.

  • Page 57: Configure Voltage And Current Output

    CURR LIMIT MAX = _10.200 A CURR LIMIT MIN= 0.000 A CURR LIMIT MAX = _10.200 A CURR LIMIT MIN = _ 0.000 A Configure Voltage and Current Output Voltage and current can be set and output from the front panel and the rear panel terminals.
  • Page 58 SET = 5.000 V 5 . 000 V 1 . 000 A For Dual Channel models: SET = 5.000 V 5 . 000 V1 . 000 A CH1 OFF 5 . 000 V 1 . 000 A CH2 OFF 3. Models 9184 and 9185 do not have auto ranging available. The range must be selected manually and can be set as HIGH or LOW range.

  • Page 59: Setting Current

    100 . 00 V 2 . 000 A VOLT RANGE = LOW ( : H / : L ) Note:The voltage setting range is dependent on the unit’s maximum voltage output specification as well as the voltage limits set from the system menu. Verify VOLT LIMIT MAX and VOLT LIMIT MIN settings if you are unable to set a voltage within the specifications of the power supply.
  • Page 60 For Dual Channel models: SET = 2.000 A 5 . 000 V 2 . 000 A CH1 OFF 5 . 000 V 2 . 000 A CH2 OFF 3. Models 9184 and 9185 do not have auto ranging available. The range must be selected manually and can be set as HIGH or LOW range.
  • Page 61 Enable/Disable Output WARNING: Before connecting wires to the front or rear panel output terminals, output should remain OFF to avoid shocks and damage to the device under test (DUT), especially when setting the supply for high voltage output. For safety, load wires must have a wire gauge size large enough to prevent overheating when the power supply operates at maximum short circuit output current.
  • Page 62 Controlling Voltage/Current Output with Keys When the output is ON (enabled), the voltage (CV mode) or current (CC mode) output can be controlled incrementally by key presses. To do this, press and a cursor will appear, highlighting the last digit of the measured voltage or current display. Use to change and select the digit you want to change, and press to increase or decrease that digit.

  • Page 63: Slew Rate Configuration

    LIMIT MAX and VOLT LIMIT MIN settings if you are unable to set a voltage within the specifications of the power supply. Slew Rate Configuration Voltage and current slew rate of the output can be configured by doing the following: to enter OUTPUT SETTING.
  • Page 64 Table 4- Voltage and Current Slew Rate Ranges Model V Slew Rate (V/ms) I Slew Rate (A/ms) 9171 0.001 – 2.500 0.001 – 1.250 9172 0.001 – 7.000 0.001 – 0.300 9173 0.001 –...

  • Page 65: Output Timer Function

    Output Timer Function The power supply has a built-in output timer function that can be enabled to allow setting a time in which output is remained ON. Follow the steps below to setup this function: to select TIMER FUNCTION. The 1.
  • Page 66 TIMER = 000 : 00 : 00 Sec 10 . 000 V1 . 000 A For Dual Channel models: TIMER = 000 : 00 : 00 Sec 10 . 000 V1 . 000 A CH1OFF 10 . 000 V1 . 000 A CH2OFF 7.

  • Page 67: Measurement Average Setting

    Measurement Average Setting The averaging measurements used to display a reading can be adjusted by following the stepsbelow: to enter OUTPUT SETTING. Press 1. Press , then Menu to select MEASURE AVERAGE. The following will display: AVERAGE TIME = _ 2 2.

  • Page 68: Series/Parallel Tracking Mode

    Note: When multiple output control is setup, there will be a maximum of 3 ms delay between channel 1 and channel 2 when both channels change output from OFF (disable) state to ON (enable) state. Follow the steps below to configure this setting: 1.

  • Page 69: Remote Sense

    1 . 000 A CH2OFF 3.7 Remote Sense Single channel models 9171, 9172, 9181, 9182, and 9183 have both front and rear panel remote sense terminals. Dual channel models 9173 and 9174, and high voltage single channel models 9184 and 9185 have rear panel remote sense terminals only.
  • Page 70 +S + + - - - S Front Panel Shorting Bar Rear Panel Shorting Bar Figure 16-Local Sense with Shorting Bar For front panel, +S and + terminals are shorted together, and –S and – terminals are shorted together with shorting bars. For rear panel, +S and + (next to +S) are shorted together, and –S and –...
  • Page 71 Figure 17- Front Panel Remote Sense Setup To use remote sense from the rear panel, both front panel (if available) and rear panel shorting bars must also be removed. The rear +S and –S ports are connected directly to the DUT, like Figure 18 below: Figure 18- Rear Panel Remote Sense Setup WARNING:...
  • Page 72 DO NOT CONNECT LIKE BELOW: For operating with output current higher than 10 A, the connection is the same as Figure 18 above, with the addition of connecting the second pair of (+) and (-) terminals in the rear panel, like below:...
  • Page 73 Rear Panel Output Rear Panel Output Remove Shorting bars +S + + - - - S +S + + - - - S Front Panel Output Remove shorting bars Figure 19- Remote Sense Setup for 10A or Higher Current Output Operation WARNING: DO NOT output 10A or more with only one pair of (+) and (-) terminals in the rear panel.

  • Page 74: Led And Low Current Test Modes

    3.8 LED and Low Current Test Modes LED Mode All of these power supplies have LED mode, which enables them to function specifically for LED test applications. When this mode is ON (enabled), the power supply can operate in such a way as to minimize or almost eliminate the inrush current drawn by the LED load, which normally exists when the output switches from an OFF state to an ON state.
  • Page 75 Figure 20- LED Testing Example The 9184 supply output is initially OFF (disabled). The LED light bar is rated for 170 V. A 10 Ω resistor is placed in series with the LED light bar. The power supply current setting (ISET) is 20 mA. Using an oscilloscope to probe between the resistor to measure current, the power supply’s output is then turned ON.

  • Page 76: Low Current Mode

    With LED mode ON (enabled), the power supply can minimize or eliminate any inrush current from turning the output ON, which in turn will minimize damage or life of the LEDs under test. Note:For LED mode to function correctly, the output must be turned OFF when connecting between the power supply and the LEDs under test.
  • Page 77 2. Press to select ON, then press to confirm the Enter changes. Press twice to exit the menu. LED MODE = OFF Low Current MODE = ON Consider the following example screenshots measuring a voltage chance from 0 V to 60 V with a load of 100 mA connected to the output.

  • Page 78: Output Protection

    3.9 Output Protection Configure OVP Overvoltage protection (OVP) is available to limit the voltage output and to protect a connected DUT from an overvoltage condition. When the power supply trips the OVP, a short beep will sound and the OVP (OVP1/OVP2 for dual channel models) LED indicator on the front panel will be lit.

  • Page 79: Configure Ocp

    protection to trip. Press again to save changes. When Enter the power supply voltage output reaches this limit, the OVP will trip. 3. Press twice to exit the menu. To disable it, select OFF. Configure OCP Overcurrent protection (OCP) is available to limit the current output and to protect a connected DUT from an overcurrent condition.

  • Page 80: Save/Recall Output Settings

    For Dual Channel models: CH1 OCP = ON SET = 10.000 A CH2 OCP = OFF SET = 10.000 A 2. Press to select ON. Press to confirm the changes, Enter and use the numeric keypad to set the current limit for the protection to trip.
  • Page 81 MEM = 0 0.000 V 0.000 A For Dual Channel models: MEM = 0 0.000 V 0.000 A 0.000 V 0.000 A 2. Press or use the keypad to select the memory location to store settings into. Choose between 0 – 9. 3.
  • Page 82 Recall Output Settings To recall a saved setting: 1. Press and the screen will display as follows: RECALL = 0.000 V 0.000 A For Dual Channel models: RECALL = 10 . 000 V 1 . 000 A CH1OFF 10 . 000 V 1 .

  • Page 83: Sequence Program Mode

    for setting the power on state to last known configuration. Select OFF to turn it off. 2. Press to confirm the change. Enter 3.11 Sequence Program Mode Up to 10 (1 – 10) programmed sequences can be stored into the internal memory of the power supply and be executed from the front panel or via remote commands.

  • Page 84: External Analog Control

    PROGRAM NUMBER = 0 PROGRAM OFF 2. Use the keypad to select the program number where the sequence is stored. Valid number is 1 – 10. Press Enter confirm the program. 3. Press for dual channel models) to OUTPUT enable the output and execute the programmed sequence. For dual channel models, both outputs will turn ON.
  • Page 85 WARNING: The terminals for external analog control of voltage and current have no input protection. Therefore take caution when connecting to a DC source or a resistance. For voltage source control, do not input a voltage outside of the range -0.7 V to 5.7 V for the 0-5 V scale, or -0.7 V to 10.7 V for 0-10 V scale.
  • Page 86 0 – 5 V 0 – 5 V 0 – 10 V 0 – 10 V Dual channel DIO/Analog Card + - + - EXT CTL Single channel DIO/Analog Card Figure 23- External Voltage Control Note: Two separate DC voltage sources must be used for the setup. One for controlling voltage and one for current.
  • Page 87 See the setup below: 0 – 5 kΩ 0 – 5 kΩ Dual channel DIO/Analog Card + - + - EXT CTL Single channel DIO/Analog Card Figure 24- External Resistance Control Note: Two separate variable resistances must be used for the setup. One for controlling voltage and one for current.
  • Page 88 2. Go down to EXTERN CONTROL (this option is only available with DIO/Analog Card installed) and press to select between OFF, VOLT, or RES. Select VOLT for external voltage control or RES for external resistance control. Select OFF to disable external analog control. 3.

  • Page 89: Digital I/O

    0.00 V 0.00 A 0.00 V 0.00 A 5. Press to turn the output ON (enabled), and output OUTPUT voltage and current will change as your external DC voltage sources or resistances change. Note: When external analog control is enabled, all front panel keys are locked except for for dual Menu...
  • Page 90 Dual Channel DIO/Analog Card Single Channel DIO/Analog Card Figure 25- Digital I/O Interface Below are the pin assignments for each of the 9 pins. Table 5- Digital I/O Pin Assignment Pin# Type Binary Bit # Decimal Representation I/O – Can be set to either input or output. GND –...

  • Page 91: Input

    INPUT Digital input for representing logic high (1) is 5 V, and for logic low (0) is 0 V. Minimum voltage for logic high (1) must be at least 3.15 V. Maximum voltage for logic low (0) must not exceed 1.35 V. To setup any of the 8 pins (except pin 5) as input pins, the remote command GPIO:DIR is used.

  • Page 92: Output

    For example, suppose all pins are set as INPUT pins, but only pin 2 and 1 have a 5 V logic high (1) signal, then only these two pins return “1” and the rest “0”. Sending GPIO? command will return: 3. The complete 8-bit binary would be 00000011.

  • Page 93: Display Errors

    (0) is 0 V. To set an output pin’s logic level, use the GPIO remote command. Again, all pins (except pin 5) are represented as 8-bits binary, according to Table 5 above. When using the GPIO command, the decimal representation of the 8-bits binary is used. Taking the example above with pins 8, 6, and 3 set as OUTPUT pins, if pins 8 and 3 are to be set with logic high (5 V) and pin 6 set with logic low (0 V), send the following command:...

  • Page 94: Connecting In Series And Parallel

    Only connect multiples units in series or parallel of the • same model. Do not mix models together. For example, you can connect two 9171 together, but not 9171 and 9172 together. • Do not connect more than 2 units of models 9174 when series/parallel tracking is used.

  • Page 95: Remote Operation

    4 Remote Operation 4.1 Interface Connection USB (Virtual COM) & RS-232 All models have a standard USB interface (virtual COM) that can be used for remote communication. Optionally, an RS232 interface card is available for remote control via RS-232 interface. Both USB (virtual COM) and RS-232 have the same serial settings listed below: BAUDRATE: 57600 PARITY: NONE...

  • Page 96: Gpib

    Table 6- RS-232 Pin Out Description Transmit Data Receive Data A straight pin-to-pin DB9female to DB9male serial cable is required for using RS-232 interface. Do not use a null modem or crossover DB9 serial cable. GPIB GPIB option is available when the supply is installed with the optional LAN/GPIB interface card.

  • Page 97: Ethernet (Lan)

    Ethernet (LAN) Ethernet (LAN) option is available when the supply is installed with the optional LAN/GPIB interface card. There are three ways to control the power supply via LAN interface: Web server, Telnet connection, Socket connection. Web Server There is an embedded web server GUI that can access the power supply via LAN interface using a java enabled web browser.
  • Page 98 4. A password is required to login and access any of the menu items on the page. DEFAULT ADMIN PASSWORD:123456 Menu Items This table describes each of the menu items available on the left frame of the web browser GUI. Table 7- Web Browser Menu Description Home Provides general information of the power supply:...
  • Page 99 Iset, Output state, Output On Timer. Figure 28 Configuration Page Screenshot Figure 29 Web Control Page Screenshot...
  • Page 100 Telnet Connection The power supply can be connected via Ethernet (LAN) interface using Telnet client with the following port: Telnet Port: 5024 Windows XP Users 1. Open a command prompt window, which can be found by going to Start > All Programs > Accessories > Command Prompt.
  • Page 101 Windows Vista/7 Users By default, Telnet client is not installed on the system. There are two ways to install it manually: 1. Open command prompt: a. Select Windows Start > All Programs > Accessories > Command Prompt b. Select Windows Start and type in cmd in the Search programs and files box and click on cmd.exe in the search list.

  • Page 102: Remote Commands

    2. Alternatively, go to Control Panel, select Programs, and select Turn Windows features on or off. Wait until the list gets populated. Then, Click the box next to Telnet Client. When finished, follow steps 1a or 1b to open Command Prompt and follow the same steps 2 and 3 from “Windows XP users”...

  • Page 103: Parameter Definitions

    Parameter Definitions Unless otherwise noted, the following table of parameter definitions applies to all supported remote commands. Commands that have [ ] around them are optional. For example, [SOURce] is not required for the SOURCE subsystem. Table 8- Parameter Definitions Parameter Description <Boolean>...

  • Page 104: Common Scpi Commands

    section do not have the termination character shown, but it is required for successful communication with the power supply.All returned strings after a query command will terminate with both <CR> and <LF> characters. For example, sending VOLT?command may return: 1.234<CR><LF> Common SCPI Commands The following commands are standard SCPI commands (1995) supported by the instrument.

  • Page 105: Scpi Command Subsystem

    *SAV Description: Saves power supply settings into a memory location Syntax: *SAV<SP><location> <location> - Memory location number to save settings into. 0 – 9 are valid numbers. Example: *SAV 2 Saves instrument settings into memory location 2. *RCL Description: Recalls power supply settings Syntax: *RCL<SP><location>...
  • Page 106 :ISET2 :SAV Output Subsystem OUTput :ALL :LIMit :VOLTage :VOLT2 :CURRent :CURR2 :MAX :VOLTage :VOLT2 :CURRent :CURR2 :MIN :VOLTage :VOLT2 :CURRent :CURR2 :VOLTage :VOLT2 :CURRent :CURR2 :STATE? :PROTection :CLEar Channel 2 Output Subsystem (dual channel models only) OUT2 :STATe? Program Subsystem PROGram :CLEar :ALL...
  • Page 107 :VOLTage :VOLT2 :TOTAl Protection Subsystem PROTection :CLEar :OCP :LEVel :OCP2 :LEVel :OVP :LEVel :OVP2 :LEVel Source Subsystem [SOURce] :CURRent :PROTection :LEVel :CURR2 :PROTection :LEVel :VOLTage :PROTection :LEVel :RANGe :VOLT2 :PROtection :LEVel System Subsystem SYStem :AVErage :BEEP :ERRor? :EXTernal :LEVel :GPIB :ADDRess :ADDRess :CONFig...
  • Page 108 :LED :LOW :CURR :OUTput :MODE :RECall :DEFault :REMote :SERies? :TRACK Timer Subsystem TIMER :HOUR :MINute :SECond GPIOSubsystem Note:The optional Analog/DIO interface card must be installed to use all GPIO commands. Table 9- Digital I/O Representation Pin# Type Binary Bit # Decimal Representation I/O –...
  • Page 109 GPIO Description: Configures digital I/Opins level to high (1) 5V or low (0) 0V for output pins. Nothing happens if the pin is an input. Syntax: GPIO<SP><decimal> <decimal> - Decimal representation of the binary value representing the GPIO pins. 0 – 255 are valid. Example: GPIO 46 Sets pins 7, 4, 3, and 2 to logic high(1) 5 V output if...

  • Page 110: Measure Subsystem

    Return String: Pins 9, 8, 7, 4, 3, and 1 are outputs and the rest are inputs. (See “Table 9” to convert the binary representation). Refer to section “3.13Digital I/O” for more details. Format: <NR1> Measure Subsystem MEASure:CURRent? Description: Queries the measured current value Query: MEAS:CURR? MEASure:CURRent?
  • Page 111 The measured current is 1.234 V. Format: <NRf> Memory Subsystem MEMory Description: Selects the memory location/Returns the selected memory location. Syntax: MEMory<SP><decimal> <decimal> - Memory location. 0 – 9 are valid. Example: MEM 2 Selects memory location 2. Query: MEM? Return String: Currently selected memory location is 8.
  • Page 112 <decimal> - Voltage value. 0 – max. rated voltage value are valid. Example: MEM:VSET2 4.132 Sets 4.132 V as voltage for the selected memory location. Query: MEM:VSET2? Return String: 4.132 Voltage is currently set to 4.132 V in the selected memory location for channel 2.

  • Page 113: Output Subsystem

    Format: <NRf> MEMory:SAV Description: Saves the configured voltage and current (using MEM:VSET and MEM:ISET commands) values into the selected memory location (using MEM command). Syntax: MEMory:SAV Example: MEM:SAV Output Subsystem OUTput Description: Configure/Query the state of the output. Syntax: OUTput<SP><Boolean> OUTput? Example: OUT 1...
  • Page 114 OUTput:LIMit:VOLTage? <voltage> - Voltage value. 0 – max. rated voltage value are valid. Example: OUT:LIM:VOLT 70.123 Sets the voltage maximum limit to 70.123 V. Query: OUT:LIM:VOLT? Return String: 70.123 Format: <NRf> OUTput:LIMit:VOLT2 Note: For dual channel models only. Description: Configures/Queries the voltage maximum limit for channel 2.
  • Page 115 OUTput:LIMit:CURR2 Note: For dual channel models only. Description: Configures/Queries the current maximum limit for channel 2. Syntax: OUTput:LIMit:CURR2<SP><current> OUTput:LIMit:CURR2? <current> - Current value. 0 – max. rated current value are valid. Example: OUT:LIM:CURR 3.456 Sets the current maximum limit to 3.456 A. Query: OUT:LIM:CURR? Return String:...
  • Page 116 OUTput:MIN:VOLT2 Note: For dual channel models only. Description: Configures/Queries the voltage minimum limit for channel 2. Syntax: OUTput:MIN:VOLT2<SP><voltage> OUTput:MIN:VOLT2? <voltage> - Voltage value. Less than max. voltage set limit value are valid. Example: OUT:MIN:VOLT2 0 Sets the voltage set minimum limit to 0 V for channel 2. Query: OUT:MIN:VOLT2? Return String:...
  • Page 117 OUTput:SR:VOLTage Description: Configures/Queries the voltage slew rate in unit of V/ms. For dual channel models, this will configure the slew rate for channel 1. Syntax: OUTput:SR:VOLTage<SP><voltage> OUTput:SR:VOLTage? <voltage> - Voltage value. 0 – max. voltage slew rate value. See “Slew Rate Configuration” in section 3.5. Example: OUT:SR:VOLT 7.000 Sets the voltage slew rate to 7.000 V/ms...
  • Page 118 Sets the current slew rate to 1.000 A/ms. Query: OUT:SR:CURR? Return String: 1.000 Format: <NRf> OUTput:SR:CURR2 Note: For dual channel models only. Description: Configures/Queries the current slew rate for channel 2. Syntax: OUTput:SR:CURR2<SP><current> OUTput:SR:CURR2? <current> - Current value. 0 – max. current slew rate value.
  • Page 119 OUT2:STATe? Description: Queries the output mode for channel 2. Syntax: OUT2:STATe? Query: OUT2:STAT? Return String: Format: CV or CC Program Subsystem The commands in this subsystem are for the program sequence function. Examples on how to use these commands to create sequences can be found in “4.3Sequence Programming”.
  • Page 120 PROGram:CLEar:ALL Description: Clears all programmed sequences stored in all 10 program locations. Syntax: PROGram:CLEar:ALL Example: PROG:CLE:ALL Clears all the programmed sequences in all 10 program locations. PROGram:NEXT Description: Configures/Queries the next program location’s sequence to run. Syntax: PROGram:NEXT<SP><location> PROGram:NEXT? <location> - 1 – 10 are valid program locations. Use 0 to end if no further sequences will be run after the current sequence.
  • Page 121 PROGram:RUN Description: Configure/Query the state of the program. Syntax: PROGram:RUN<SP><Boolean> PROG:RUN? Example: PROG 1 PROG ON Enables the programmed sequence to start. Query: PROG:RUN? Return String: Currently the selected program sequence is not running. Format: ON or OFF PROGram:SAV Description: Saves the programmed sequence into the selected memory location (Select using the PROG command) Syntax:...
  • Page 122 PROGram:STEP:CURRent Description: Configures/Queries the current setting for the selected step (use PROGram:STEP command to select step). For dual channel models, this will be for channel 1. Syntax: PROGram:STEP:CURRent<SP><current> PROGram:STEP:CURRent? <current> - 0 – max. rated current. Example: PROG:STEP:CURR 1.234 Set 1.234 A as current setting for the selected step in the program sequence.
  • Page 123 PROGram:STEP:VOLTage Description: Configures/Queries the voltage setting for the selected step (use PROGram:STEP command to select step). For dual channel models, this will be for channel 1. Syntax: PROGram:STEP:VOLTage<SP><voltage> PROGram:STEP:VOLTage? <voltage> - 0 – max. rated voltage. Example: PROG:STEP:VOLT 1.234 Set 1.234 V as voltage setting for the selected step in the program sequence.

  • Page 124: Protection Subsystem

    Protection Subsystem PROTection Note: See STATUS command in the next section. PROTection:CLEar Description: Clears/resets all latched protection (when protection is flagged/tripped) Syntax: PROTection:CLEar Example: PROT:CLE PROTection:OCP Description: Configure/Query the state of OCP (over current protection). Syntax: PROTection:OCP<SP><Boolean> PROT:OCP? Example: PROT 1 PROT ON Enables OCP Query:...
  • Page 125 PROTection:OCP2 Note: For dual channel models only. Description: Configures/Queries the state of OCP channel 2. Syntax: PROTection:OCP2<SP><Boolean> PROT:OCP2? Example: PROT 1 PROT ON Enables OCP on channel 2. Query: PROT:OCP? Return String: Currently OCP for channel 2 is disabled. Format: ON or OFF PROTection:OCP2:LEVel Note:...
  • Page 126 PROTection:OVP:LEVel Description: Configures/Queries the voltage level for OVP. Syntax: PROTection:OVP:LEVel<SP><voltage> PROTection:OVP:LEVel? <voltage> - 0 – max. rated voltage. Example: PROT:OVP:LEV 20.000 Set 20.000 V as the OVP voltage level. Query: PROT:OVP:LEV? Return String: 20.000 Format: <NRf> PROTection:OVP2 Note: For dual channel models only. Description: Configure/Query the state of OVP (over voltage protection) for channel 2.

  • Page 127: Source Subsystem

    Source Subsystem [SOURce]:CURRent Description: Configures/Queries the ISET current setting. For dual channel models, use [SOURce]:CURR2 command for channel 2. Syntax: [SOURce]:CURRent<SP><current> [SOURce]:CURRent? <current> - 0 – max. rated current. Example: SOUR:CURR 1.456 Set current to 1.456 A. Query: SOUR:CURR? Return String: 1.456 Format: <NRf>...
  • Page 128 [SOURce]:CURR2:PROTection Note: See PROTection:OCP2 command. [SOURce]:CURR2:PROTection:LEVel Note: See PROTection:OCP2:LEVel command. [SOURce]:VOLTage Description: Configures/Queries the VSET voltage setting. For dual channel models, use [SOURce]:VOLT2 command for channel 2. Syntax: [SOURce]:VOLTage<SP><voltage> [SOURce]:VOLTage? <voltage> - 0 – max. rated voltage. Example: SOUR:VOLT20.000 Set voltage to 20.000 V. Query: SOUR:VOLT? Return String:...

  • Page 129: System Subsystem

    [SOURce]:VOLT2 Note: For dual channel models only. Description: Configures/Queries theVISET voltage setting for channel 2. Syntax: [SOURce]:VOLT2<SP><voltage> [SOURce]:VOLT2? <voltage> - 0 – max. rated voltage. Example: SOUR:VOLT220.000 Set voltage of channel 2 to 20.000 V. Query: SOUR:VOLT2? Return String: 20.000 Format: <NRf>...
  • Page 130 SYStem:BEEP Description: Configure/Query the state of the key sound. Syntax: SYStem:BEEP<SP><Boolean> SYStem:BEEP? Example: SYS:BEEP 0 SYS:BEEP OFF Disables the key sound. Query: SYS:BEEP? Return String: Key sound is disabled. Format: ON or OFF SYStem:ERRor? Description: Queries the error from the error queue. Syntax: SYStem:ERRor? Return Syntax:...
  • Page 131 SYStem:EXTernal Description: Configure/Query the state/type of the analog external control. Syntax: SYStem:EXTernal<SP><type> SYStem:EXTernal? <type> - 0/OFF, 1/VOLT, 2/RES Example: SYS:EXT 1 SYS:EXT VOLT Set to use voltage source for external analog control Query: SYS:EXT? Return String: Currently set to resistance external control. Format: <type>...
  • Page 132 SYStem:IP:ADDRess Description: Configure/Query the LAN IP address Syntax: SYStem:IP:ADDRess<SP><ip> SYStem:IP:ADDRess? <ip> - NR1.NR1.NR1.NR1. NR1 can be from 000 – 255. Example: SYS:IP:ADDR 192.168.001.150 Sets the IP address to 192.168.1.150 Query: SYS:IP:ADDR? Return String: 192.168.001.150 Format: <NR1>.<NR1>.<NR1>.<NR1> SYStem:IP:CONFig Description: Configure/Query the configuration of the IP. Syntax: SYStem:IP:CONFig<SP><config>...
  • Page 133 SYStem:LCD:BL Description: Configures/Queries the LCD backlight state Syntax: SYStem:LCD:BL<SP><state> SYStem:LCD:BL? <state> - 0/ON, 1/OFF1, 2/OFF5, 3/OFF10, 4/OFF30 (For Always ON, ON 1 minutes, ON 5 minutes, ON 10 minutes, ON 30 minutes respectively) Example: SYS:LCD:BL Enables key lock. Query: SYS:KEY? Return String: Format: ON or OFF...
  • Page 134 SYStem:OUTput:MODE Note: For dual channel models only. Description: Configures/Queries the state of the output mode. Syntax: SYStem:OUTput:MODE<SP><state> SYStem:OUTput:MODE? <state> - 0/MULTI or 1/SINGLE Example: SYS:OUT:MODE 0 SYS:OUT:MODE MULTI Sets output mode to MULTI. Query: SYS:OUT:MODE? Return String: MULTI Format: SINGLE or MULTI SYStem:RECall:DEFault Description: Resets back to default factory settings.
  • Page 135 SYStem:TRACK Note: For dual channel models only. Description: Configures/Queries the state of tracking mode. Syntax: SYStem:TRACK<SP><Boolean> SYStem:TRACK? Example: SYS:TRACK 1 SYS:TRACK ON Enables tracking mode. Query: SYS:TRACK? Return String: Format: ON or OFF Timer Subsystem TIMER Description: Configures/Queries the state of the output timer function.
  • Page 136 TIMER:MINute Description: Configures/Queries the output timer hours. Syntax: TIMER:MINute<SP><hour> TIMER:MINute? <hour> - 0 - 59 Example: TIMER:MIN 40 Sets the output timer to 40 minutes. Query: TIMER:MIN? Return String: Format: <NR1> TIMER:SECond Description: Configures/Queries the output timer seconds. Syntax: TIMER:SECond<SP><hour> TIMER:SECond? <hour>...
  • Page 137 ADDRess Description: Configures/Queries the GPIB address Syntax: ADDRess<SP><address> ADDRess? <address> - GPIB address. 0 – 30 are valid addresses. Example: ADDR 10 Sets the GPIB address to 10. Query: ADDR? Return String: Format: <NR1> BEEP Description: Configures/Queries the key sound state Syntax: BEEP<SP><state>...
  • Page 138 Format: <channel> CURRent/CURR2 Note: CURR2 command is for dual channel models only. Description: Configures/Queries the ISET current setting. For dual channel models, use CURR2 command for channel 2. Syntax: CURRent<SP><current> CURR2<SP><current> CURRent? CURR2? <current> - 0 – max. rated current output Example: CURR2 1.234 Sets the second channel ISET current to 1.234 A on a...
  • Page 139 IOUT?/IOUT2? Note: IOUT2 command is for dual channel models only. Description: Queries the measured/readback current output value. For dual channel models, use IOUT2 command for channel 2. Syntax: IOUT? IOUT2? Example: IOUT? Return String: 2.156 Output current measured is 2.156 A. Format: <NRf>...
  • Page 140 OCP/OCP2 Note: OCP2 command is for dual channel models only. Description: Configures/Queries the over current protection state. For dual channel models, use OCP2 command for channel 2. Syntax: OCP<SP><state> OCP2<SP><state> OCP? OCP2? <state> - ON or 1 to turn ON - OFF or 0 to turn OFF Example: OCP2 ON...
  • Page 141 OUT/OUT2 Note: OUT2 command is for dual channel models only. Description: Configures/Queries the output state. For dual channel models, use OUT2 command to configure/query channel 2 output state. Syntax: OUT<SP><state> OUT2<SP><state> OUT? OUT2? <state> - ON or 1 to turn ON - OFF or 0 to turn OFF Example: OUT 1...
  • Page 142 OVP/OVP2 Note: OVP2 command is for dual channel models only. Description: Configures/Queries the over voltage protection state. For dual channel models, use OVP2 command for channel 2. Syntax: OVP<SP><state> OVP2<SP><state> OVP? OVP2? <state> - ON or 1 to turn ON - OFF or 0 to turn OFF Example: OVP2 ON...
  • Page 143 STATUS? Description: Queries the instrument status Syntax: STATUS? Example: STATUS? Return String: 000000 No OVP, OCP, OTP, and other failure or flagged status. Outputs are off, LCD backlight always ON, and output mode set to MULTI. Format: <byte2><byte1><byte0> Refer to the table and description below for details on the returned data.
  • Page 144 Example 2: Return string: 00008C Byte 2: 0 Byte 1: 0 Byte 0: 8C 8C = 10001100 (bits 7 – bit 0) Representation: - Channel 1 OVP status is ON - Channel 1 output is ON - Channel 2 output is ON - LCD backlight is ALWAYS ON - Output mode is MULTI - No protection flag status (instrument is operating normally)
  • Page 145 VOLTage/VOLT2 Note: VOLT2 command is for dual channel models only. Description: Configures/Queries the VSET voltage setting. For dual channel models, use VOLT2 command for channel 2. Syntax: VOLTage<SP><voltage> VOLT2<SP><voltage> VOLTage? VOLT2? <voltage> - 0 – max. rated voltage output Example: VOLT2 12.000 Sets the second channel VSET voltage to 12.000 V on a dual channel model.

  • Page 146: Sequence Programming

    4.3 Sequence Programming The power supply has the ability to store custom programmed sequences and run them, as described in “3.11Sequence Program Mode”. This section provides some examples of how to create some sequences using remote commands described in the previous section.
  • Page 147 PROG:STEP:VOLT 5 Output voltage is set to 5 volts PROG:STEP:ONT 0.1 Output ON time is set to 0.1 sec PROG:STEP 2 Following 3 settings are for step 2 PROG:STEP:CURR 1 PROG:STEP:VOLT 10 PROG:STEP:ONT 0.1 PROG:STEP 3 Choose step 3 PROG:STEP:CURR 1 PROG:STEP:VOLT 15 PROG:STEP:ONT 0.1 PROG:STEP 4...
  • Page 148 PROG 1 Select program 1 PROG:RUN ON Use RUN ON command to execute Example 2: To create an output sequence like above, send the following list of commands in order: PROG 2 Choose program number PROG:CLE Clear program 2 data PROG:REP 0 No repeat after running this program PROG:TOTA 8...
  • Page 149 PROG:STEP:CURR 1 PROG:STEP:VOLT 20 PROG:STEP:ONT 0.5 PROG:STEP 6 Choose step 6 PROG:STEP:CURR 2 PROG:STEP:VOLT 5 PROG:STEP:ONT 0.5 PROG:STEP 7 Choose step 7 PROG:STEP:CURR 2 PROG:STEP:VOLT 20 PROG:STEP:ONT 0.5 PROG:STEP 8 Choose step 8 PROG:STEP:CURR 2 PROG:STEP:VOLT 0 PROG:STEP:ONT 0.5 PROG:NEXT 0 Select next program to run after program 2 is complete, 0 means stop PROG:SAV...

  • Page 150: Multi Unit Programming

    PROG 1 Select program 1 PROG:NEXT 2 Change the NEXT command from NEXT 0 to NEXT 2 PROG:SAV After edit is complete use Save command to store changes in the hardware PROG 1 Select program 1 PROG:RUN ON Use RUN ON command to execute 4.4 Multi Unit Programming The instrument can be connected together with multiple units via RS-485 interface, as described in section “3.2Remote Interface...

  • Page 151: Remote Commands Via Usb

    communicate with each connected instrument with this specific setup. Remote Commands via USB The following lists all the available commands to control multiple power supplies with the multi unit programming configuration illustrated in “Figure 30”. For all configuration commands (except for commands listed under Synchronous Control Commandssection), the instrument will return a string “OK”...
  • Page 152 This command functions the same as *IDN?, however this is used in a multi unit programming setup for the selected power supply. Query: CIDN? Return String: B&K PRECISION,9171,SN#,1.10,0 CREV? Description: Queries the firmware version of the selected power supply. Query:...
  • Page 153 CST? Description: Queries the status of the selected power supply. This command functions the same as STATUS? command, however this is used in a multi unit programming setup for the selected power supply. Query: CST? CCLR Description: Clears the protection flag/trip of the selected power supply.
  • Page 154 CMODE?/CMODE2? CPV/CPV2 Description: Configures/Queries the VSET voltage setting of the selected power supply. See VOLTage/VOLT2command for similar syntax.CPV2 is for dual channel models only. Example: CPV 15.698 Sets the selected power supply’s VSET voltage setting to 15.698 V. CPV2? Queries the selected power supply’s second channel VSET voltage setting.
  • Page 155 Description: Queries the measured/readback current output value of the selected power supply. See IOUT?/IOUT2? Command for similar syntax.CMC2?is for dual channel models only. Query: CMC? Return String: 1.234 A The selected power supply has a measured output current of 1.234 A. CDVC?/CDVC2? Description: Queries the display voltage and current of the selected...
  • Page 156 Description: Configures/Queries the over voltage protection value of the selected power supply. See OVSET/OVSET2 command for similar syntax. COV2 is for dual channel models only. Example: COV 70.000 Sets the selected power supply’s OVP value to 70.000V. COV2? Queries the selected power supply’s second channel OVP value.
  • Page 157 Description: Configures/Queries the over current protection state of the selected power supply. See OCP/OCP2 command for similar syntax. COCP2 is for dual channel models only. Example: COCP ON Sets the selected power supply’s OCP state to ON. COCP2? Queries the selected power supply’s second channel OCP state.
  • Page 158 Enable both channels’ output for a dual channel supply with address 2 CADR 2 COUTA ON Return String: OK Query the measured/readback current output of power supply with address 6 CADR 6 CMC? Synchronous Control Command This set of commands can be used to control all the power supplies connected in the RS-485 chain at once.
  • Page 159 GRST Description: Resets all the power supplies connected in the chain to a known state. Syntax: GRST GCLS Description: Clears the status of all the power supplies connected in the chain. Syntax: GCLS GCLR Description: Clears the protection flag/trip of all the power supplies connected in the chain.
  • Page 160 GOUT/GOUT2 Description: Configures/Queries the output state of all the power supplies in the chain. See OUT/OUT2 command for similar syntax. GOUT2 is for dual channel models only. Example: GOUT ON Sets all the power supplies’ output to ON. GOUTA Note: For dual channel models only.

  • Page 161: Error List

    Sets all the power supplies’ OCP value to 3.000 A. GOCP/GOCP2 Description: Configures/Queries the over current protection state of all the power supplies connected in the chain. See OCP/OCP2 command for similar syntax. GOCP2 is for dual channel models only. Example: GOCP ON Sets all the power supplies’...

  • Page 162: Troubleshooting Guide

    5 Troubleshooting Guide Below are some frequently asked questions and answers. Please check if any applies to your power supply before contacting B&K Precision. General Q: I cannot power up the power supply. Check that the power cord is securely connected to the AC input and there is live power from your electrical AC outlet.
  • Page 163 drop, use remote sense terminals to compensate and output a more accurate voltage to the DUT. Q: On my dual channel power supply, how do I set a timer output for each channel? The two channels are dependent on the same timer function. Therefore, when used it will affect both outputs.

  • Page 164: Remote Control

    Remote Control Q: I am trying to send the commands over USB/RS232, but it does not seem to respond. Check that you are sending ASCII strings that are terminated with a CR (carriage return) and LF (linefeed) character. For USB, check that the correct USB drivers are installed and that you are communicating with the right COM port, which can be verified under “Device Manager”...

  • Page 165: Specifications

    Note: All specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 23 °C ± 5 °C. Specifications are subject to change without notice. Model 9171 9172 Output Rating Low Range 0–10V/0 -10A...
  • Page 166 Model 9181 9182 Output Rating Low Range 0–18V/0–8A 0–10V/0–20A High Range 0–36V/0–4A 0–20V/0–10A Output Channel Output Power 144W 200W General Maximum Rated Input 330VA 680VA Power 210mmx87mmx414m 210mmx130.5mmx4 Dimension(W*H*D) 15mm Weight 7.7kg 12kg Model 9183 Output Rating Low Range 0–35V/0–6A High Range 0–70V/0–3A Output Channel...
  • Page 167 ≤ 1.5 mVrms/≤ 15 mVpp (9184) ≤ 4.5 mVrms/≤ 45 mVpp (9185) Normal Mode Current ≤ 2mA rms Common Mode Current ≤ 1.5uA rms Resolution <1 mV/<1 mA (9171,9173,9181,9182) <2 mV/<0.1 mA (9172,9174) Programming and <2mV/<0.2mA (9183) Readback <10mV/<0.1mA (9184) <20mV/<0.01mA (9185)
  • Page 168 ≤ 0.02%+20 mV(9185) Current ≤ 0.1%+1mA Settling Time ≤ 30ms Measurement Time ≤ 50ms ≤ 50μs (9171 - 9183) Transient Response Time ≤ 100μs (9184, 9185) ≤ 0.5%+0.1V (9171 – 9183) OVP Accuracy ≤ 0.5%+1V (9184, 9185) OCP Accuracy ≤ 0.5%+0.1A OVP/OCP Activation Time ≤...
  • Page 169 VOLTage or VSET command via direct GPIB or USB interface. Models 9171 – 9183: Less than 50 μs for output to recover to within 15 mV following a change in output current from full load to half load or vice versa.

  • Page 170: Calibration

    7 Calibration Access Calibration Menu Follow the steps below to access the calibration menu. to enter CALIBRATION. The 1. Press , then Menu following screen will be displayed: PLEASE KEYIN PASSWORD : _ 2. Enter the password: 13579 with the numeric keypad. 3.

  • Page 171: Requirements

    Requirements Before calibrating, the “+”output terminal must be connected to the “+S” terminal and the “–”output terminal must be connected to the “–S” terminal using the included shorting bars/pins. The following equipment is required for the calibration procedure: • 6 ½ digit precision digital multimeter •...
  • Page 172 6 ½ Digit DMM Figure 31 - Current Calibration Setup...
  • Page 173 6 ½ Digit DMM Figure 32- Current Calibration with Shunt Follow the steps below to proceed with current calibration: 1. From the calibration menu, press to enter CURRENT CALIBRATION. The following screen will be shown. CURRENT CALIBRATION CH: 1 Set = X . XXXXA Read = XXX IML Set = X .
  • Page 174 IL Set = __.____A on the display. Press to proceed to IML. Enter If current shunt is used for the calibration, divide the DMM readings (in DCV) by the resistance (Rs) of the shunt. The result should be DCV/Rs. Enter this current result into IL. 4.

  • Page 175: Voltage Calibration

    Voltage Calibration Use the setup diagram shown in Figure 33 below for voltage calibration. Connect the rear output terminals of the power supply to the DMM. 6 ½ Digit DMM Figure 33- Voltage Calibration Setup Follow the steps below to proceed with voltage calibration: 1.
  • Page 176 3. The power supply will output a pre-set voltage to the DMM. Wait for the DMM reading to settle, then enter it into where it shows VL Set = __.____V on the display. Press to proceed to the Enter next setp. 4.

  • Page 177: External Analog Input Calibration

    External Analog Input Calibration This calibration option is only available if the optional DIO/Analog Interface Card is installed in the power supply. Follow the steps below to proceed with external analog input calibration. 1. From the calibration menu, press to enter EXT. INPUT CALIB.
  • Page 178 Calib EXT . Lo Volt = 1 . 000 V Calib EXT . Lo Volt = 9 . 000 V CH 1 EXT . VOLT Res = Start CH 1 EXT . CURR Res = Start CH 2 EXT . VOLT Res = Start CH 2 EXT .
  • Page 179 5. To begin calibration with the external resistor, remove the DC source and connect the precision resistor to the control card, as shown in Figure 37(right) below. Figure 37- External Resistance Control Calibration setup (left) Current (right) Voltage 6. The supply will display CH1 EXT. VOLT Res. Press Enter calibrate.
  • Page 180 Figure 38- Dual Channel External Analog Voltage Input Calibration Setup 10. (Dual channel) For the external resistor calibration, connect like for channel 1 for current and voltage, and connect like for channel 2 for current and voltage. 11. Once finished, the supply will return to the calibration menu. To exit and go back to the main display, press twice.
  • Page 181 Figure 40- Channel 2 Setup for External Analog Resistor Input Calibration...

  • Page 182: Index

    Index AC input, 18 OVP, 66 Calibration, 158 Power-On State, 70 CHAIN SETTING, 38 Rackmount, 9 Current Limit, 44 rear output terminals, 21 Digital I/O, 77 Recall, 70 Dual Channel, 49, 55 Remote Commands, 91 Enable/Disable Output, 49 Remote Sense, 57 errors, 81 Resistance, 74 Ethernet (LAN), 34, 88...

  • Page 183: 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 184: Limited Three-Year Warranty

    LIMITED THREE-YEAR WARRANTY B&K Precision Corp. warrants to the original purchaser that its products and the component parts thereof, will be free from defects in workmanship and materials for a period of three year from date of purchase. B&K Precision Corp. will, without charge, repair or replace, at its option, defective product or component parts.
  • Page 187 22820 Savi Ranch Parkway Yorba Linda, CA92887 www.bkprecision.com © 2013 B&K Precision Corp. Printed in Taiwan v091913...

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