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BK Precision 9172 User Manual
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BK Precision 9172 User Manual

BK Precision 9172 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 9172

  • Page 1 Model: 9171, 9172, 9173, 9174, 9181, 9182, 9183, 9184, 9185 Programmable DC Power Supplies USER MANUAL...
  • Page 3 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...
  • Page 7 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 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 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 ..........67 3.11 Sequence Program Mode ..........70 3.12 External Analog Control ............. 71 3.13 Digital I/O ................76 INPUT ..................78 OUTPUT ..................79 3.14 Display Errors ..............80 3.15 Connecting in Series and Parallel ........81 Remote Operation ..............
  • Page 12 Voltage Calibration ..............163 External Analog Input Calibration..........165 Index ................... 170 SERVICE INFORMATION ............171 LIMITED THREE-YEAR WARRANTY ........172...
  • Page 13 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 USB interface or optional RS232, GPIB and LAN interface. Interface cards and I/O cards come in a modular form factor.
  • Page 14 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 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 11 8 Figure 4 - Front Panel for 9184/9185...
  • Page 17 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 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 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 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 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 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 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 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: Fasten the parts Step 2 Step 4 Step 4: Fasten 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 the parts Step 3 Step 1 Step 3: Fas ten the parts Step 4 Step 2 Step 4: Fas ten the 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 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 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 Rear Panel (Bottom View) Rear Feet Line Voltage Switch Front Feet Front Panel 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.
  • 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 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 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 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 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 • 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 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 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: 1. Press , then to enter SYSTEM SETTING. Select Menu REMOTE and press until “GPIB”...
  • Page 47 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 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: 1. Press , then to enter SYSTEM SETTING. Select Menu LCD BACKLIT.
  • Page 52 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. To unlock, press and the Lock LED indicator will turn off. The KEY LOCK option under SYSTEM SETTING category will automatically default back to OFF.
  • Page 53 WARNING: Restoring the instrument to factory default will change all current instrument settings and parameters back to their default values. 1. Press , then to enter SYSTEM SETTING. Select Menu RECALL DEFAULT. Press to change it. Selectable options are: Options Description Default Resets instrument with factory...
  • Page 54 Table 3 Factory Default Settings REMOTE GPIB ADDR KEY LOCK IP CONFIG STATIC IP ADDRESS 255.255.255.255 BEEP LCD BACKLIT ALWAYS ON VOLT LIMIT MAX Max. rated voltage of model VOLT LIMIT MIN 0.000V CURR LIMIT MAX Max. rated current of model CURR LIMIT MIN 0.0005A V SLEWRATE...
  • Page 55 Voltage Limit Set 1. Press , then to enter OUTPUT SETTING. Press Menu to select VOLT LIMIT SETTING. 2. VOLT LIMIT MAX should be selected. Use the keypad to enter the maximum voltage set limit and press to save Enter changes.
  • Page 56 Current Limit Set 1. Press , then to enter OUTPUT SETTING. Press Menu to select CURR LIMIT SETTING. 2. CURR LIMIT MAX should be selected. Use the keypad to enter the maximum current set limit and press to save Enter changes.
  • Page 57 Configure Voltage and Current Output Voltage and current can be set and output from the front panel and the rear panel terminals. Refer to “3.7 Remote Sense” for setup instructions if remote sense will be used for voltage compensation at the output.
  • Page 58 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. 9184: HIGH range – 200 V / 1 A LOW range – 100 V / 2 A 9185: HIGH range –...
  • Page 59 Setting Current Follow the steps below to set the output current: 1. For single channel models, skip to step 2 below. For dual channel models, from the main display press to select the channel for setting current. The channel indicators CH1 or CH2 will flash to indicate the selected channel.
  • Page 60 LOW range – 100 V / 2 A 9185: HIGH range – 600 V / 0.35 A LOW range – 400 V / 0.5 A To select HIGH range, press from the normal display To select LOW range, press instead. Note:The current setting range is dependent on the unit’s maximum current output specification as well as the current limits set from the system menu.
  • Page 61 from both the front panel and the rear panel output terminals. A green LED light next to the button will be lit when pressed to turn ON (enable), and the OFF annunciator will disappear from the display. This will reappear when output is OFF (disable) upon pressing again, and the green LED light will disappear.
  • Page 62 5 . 000 V1 . 000 A For Dual Channel models: 5 . 000 V1 . 000 A CH1CV 5 . 000 V1 . 000 A CH2CV 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.
  • Page 63 V SLEWRATE = _ 7.000 V / ms For Dual Channel models: V SLEWRATE = _ 7.000 V / ms V SLEWRATE = _ 7.000 V / ms 2. Use the keypad to enter the voltage slew rate. (Refer to Table 4) Then press the save the changes.
  • 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 – 2.500 0.001 – 1.250 9174 0.001 – 7.000 0.001 –...
  • Page 65 2. While the cursor is selecting TIMER, press so that ON is selected, then press to set and selectTIME. This will be Enter the time for which the output will remain ON. 3. Use the numeric keypad to enter the Hr (hour) for the output to remain ON.
  • Page 66 Note:For dual channel models, the timer function will work only with both channels ON (enabled) simultaneously regardless of the OUTPUT MODE setting configured in SYSTEM SETTING menu. The internal timer is shared by both channels. Measurement Average Setting The averaging measurements used to display a reading can be adjusted by following the stepsbelow: 1.
  • Page 67 3.6 Dual Channel Configurations Features described in this section pertain to dual channel models 9173 and 9174 only. They are not available for all other models. Multi/Single Output Control Dual channel outputs can be configured so that pressing the output buttons can turn ON (enable) or OFF (disable) both channels’...
  • Page 68 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 69 local sense mode by default. Refer to the following sections for details of local and remote sense setup. Local Sense All power supplies are setup with local sense by default.In local sense mode, shorting bars between the sense terminals and output terminals are connected on the front panel (if available) and rear panel outputs.
  • Page 70 Remote Sense To setup and use remote sense from the front panel (if available), both the front panel and rear panel shorting bars must be removed. The front +S and –S sense ports are then connected directly to the DUT, like Figure 17 below: 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.
  • Page 71 WARNING: In remote sense where both the front and/or rear panel shorting bars are removed, never connect a device directly tothe front (if applicable) and/or back +S and –S terminals only. Always connect the + and – terminals first, then connect the +S and – S terminals.
  • Page 72 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 73 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 74 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 75 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 76 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 77 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 78 2. Press to select ON. Press to confirm the changes, Enter and use the numeric keypad to set the voltage limit for the protection to trip. Press again to save changes. When Enter the power supply voltage output reaches this limit, the OVP will trip.
  • Page 79 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 80 Save Output Settings Follow these steps to save settings: 1. Press , then to enter MEMORY SETTING. The Menu following screen will bedisplayed: 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.
  • Page 81 5. For dual channel models, repeat step 3 twice, once for CH1 and for CH2. Each memory location will store both channels’ voltage and current settings. Recall Output Settings To recall a saved setting: 1. Press and the screen will display as follows: RECALL = 0.000 V 0.000 A...
  • Page 82 1. Press , then to enter SYSTEM SETTING. Select Menu POWER ON STATE. Press to change it to LAST 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 –...
  • Page 83 1. Press , then to enter PROGRAM MODE. The Menu following screen will be displayed: 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.
  • Page 84 0 V being the minimum voltage/current output, which is 0 V/0 A(The scale factor is linear to the full scale voltage/current output). With model 9172 (rated 35V/3A, 70V/1.5A) as an example, using the 0 – 10 V scale and applying 0 V input for V...
  • Page 85 will output 0 V. Applying 10 V input for V will output 35 V or 70 V depending on the range. Likewise, 10 V for I will set current to 3A or 1.5 A depending on the range. See the setup below: 0 –...
  • Page 86 A (The scale factor is linear to the full scale voltage/current output). See the setup below: 0 – 5 kΩ 0 – 5 kΩ Dual channel DIO/Analog Card + - + - + - + - + - + - + - + - EXT CTL Single channel DIO/Analog Card...
  • Page 87 1. Press , then to enter SYSTEM SETTING. Menu 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.
  • Page 88 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 89 + - + - + - + - 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...
  • Page 90 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 91 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 92 (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 93 Do not connect more than 2 units of models 9174 when series/parallel tracking is used. • Do not connect more than 3 units of models 9172 and 9183. • Never connect more than 4 units at a time in series or parallel.
  • Page 94 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...
  • Page 95 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 96 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 97 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 98 Vset, Iset, Output state, Output On Timer. Figure 28 Configuration Page Screenshot Figure 29 Web Control Page Screenshot...
  • Page 99 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 100 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 101 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 102 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 103 Query the instrument ID, which includes manufacturer name, model #, serial #, and firmware version all separated by commas. The last parameter is a “0” and is unused. Example: *IDN? Return String: B&K PRECISION,9172,1234567,1.10,0 Format: <manufacturer>,<model>,<serial number>,<firmware version>,0 *CLS Description: Clears status and errors...
  • Page 104 *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 105 :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 106 :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 107 :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 108 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 109 inputs.Binary value of 1 is output and 0 is input. Query: GPIO:DIR? 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.
  • Page 110 Query: MEAS:VOLT2? Return String: 1.234 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:...
  • Page 111 command to select memory location first) Syntax: MEMory:VSET2<SP><decimal> <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 112 Current is currently set to 2.159 A in the selected memory location for channel 2. 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...
  • Page 113 dual channel models, this will configure voltage limit for channel 1. Syntax: OUTput:LIMit:VOLTage<SP><voltage> 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>...
  • Page 114 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 115 Query: OUT:MIN:VOLT? Return String: Format: <NRf> 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 Query: OUT:MIN:VOLT2?
  • Page 116 Sets the current minimum limit to 0 A. Query: OUT:MIN:CURR2? Return String: Format: <NRf> 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>...
  • Page 117 A/ms. For dual channel models, this will configure the slew rate for channel 1. Syntax: OUTput:SR:CURRent<SP><current> OUTput:SR:CURRent? <current> - Current value. 0 – max. current slew rate value. See “Slew Rate Configuration” in section 3.5. Example: OUT:SR:CURR 1.000 Sets the current slew rate to 1.000 A/ms. Query: OUT:SR:CURR? Return String:...
  • Page 118 Syntax: OUT2<SP><Boolean> OUT2? Example: OUT2 1 OUT2 ON Enables the output for channel 2. Query: OUT2? Return String: Format: ON or OFF 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.
  • Page 119 command) Syntax: PROGram:CLEar Example: PROG:CLE Clears the programmed sequence at the selected program location. 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...
  • Page 120 location 10 times. Query: PROG:REP? Return String: Currently set to repeat the sequence 300 times. Format: <NR1> 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...
  • Page 121 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 122 Unit is in seconds. Syntax: PROGram:STEP:ONTime<SP><seconds> PROGram:STEP:ONTime? <seconds> - 0.010 – 2000 (max.) Example: PROG:STEP:ONT 0.050 Set the selected step time to 0.050 seconds (50 ms). Query: PROG:STEP:ONT? Return String: 0.050 Format: <seconds> PROGram:STEP:VOLTage Description: Configures/Queries the voltage setting for the selected step (use PROGram:STEP command to select step).
  • Page 123 for the program sequence. Syntax: PROGram:TOTAl<SP><number> PROGram:TOTAl? <number> - 2 -150 (max.) Example: PROG:TOTA 100 Setup a program sequence with 100 steps. Query: PROG:TOTA? Return String: Currently the sequence will have 30 steps for setup. Format: <NR1> Protection Subsystem PROTection Note: See STATUS command in the next section.
  • Page 124 PROTection:OCP:LEVel? <current> - 0 – max. rated current. Example: PROT:OCP:LEV 3.000 Set 3.000 A as the OCP current level. Query: PROT:OCP:LEV? Return String: 3.000 Format: <NRf> PROTection:OCP2 Note: For dual channel models only. Description: Configures/Queries the state of OCP channel 2. Syntax: PROTection:OCP2<SP><Boolean>...
  • Page 125 Example: PROT 1 PROT ON Enables OVP Query: PROT:OVP? Return String: Currently OVP is disabled. Format: ON or OFF 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.
  • Page 126 <voltage> - 0 – max. rated voltage. Example: PROT:OVP2:LEV 20.000 Set 20.000 V as the OVP voltage level for channel 2. Query: PROT:OVP2:LEV? Return String: 20.000 Format: <NRf> Source Subsystem [SOURce]:CURRent Description: Configures/Queries the ISET current setting. For dual channel models, use [SOURce]:CURR2 command for channel 2.
  • Page 127 Query: SOUR:CURR2? Return String: 1.456 Format: <NRf> [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.
  • Page 128 <range> - 0 or 1 / LOW or HIGH Example: SOUR:VOLT:RANG LOW SOUR:VOLT:RANG 0 Set the supply to the low voltage range. Query: SOUR:VOLT:RANG? Return String: Format: <range> [SOURce]:VOLT2 Note: For dual channel models only. Description: Configures/Queries theVISET voltage setting for channel 2.
  • Page 129 Return String: Format: <NR1> 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 130 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 131 SYStem:GPIB:ADDRess? <address> - 1 – 30 are valid numbers. Example: SYS:GPIB:ADDR 6 Sets the GPIB address to 6. Query: SYS:GPIB:ADDR? Return String: Format: <NR1> 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.
  • Page 132 Return String: Format: ON or OFF 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.
  • Page 133 Return String: Format: ON or OFF 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...
  • Page 134 SYStem:SERies? Description: Queries the serial number of the instrument. Syntax: SYStem:SERies? Query: SYS:SER? Return String: 123D12101 Serial number of the instrument is 123D12101. 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...
  • Page 135 TIMER:HOUR? <hour> - 0 - 999 Example: TIMER:HOUR 100 Sets the output timer to 100 hours. Query: TIMER:HOUR? Return String: Format: <NR1> 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.
  • Page 136 the SCPI commands described in the previous section. For example, MEASure:CURRent? functions the same as IOUT?. 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:...
  • Page 137 Syntax: CHANnel<SP><channel> CHANnel? <channel> - 1 or 2. Example: CHAN 2 Selects channel 2. Query: CHAN? Return String: 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.
  • Page 138 Input Range Error 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 139 Syntax: MODEL? Example: MODEL? Return String: 9174 Format: <model> 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>...
  • Page 140 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 141 Format: <mode> 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 142 OVP is set to 70.000 V Format: <NRf> 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>...
  • Page 143 1 is ON, 0 is OFF Channel 1 OVP On/Off status 1 is ON, 0 is OFF Channel 2 OVP On/Off status 1 is ON, 0 is OFF Channel 1 OCP On/Off status 1 is ON, 0 is OFF Channel 2 OCP On/Off status 1 is ON, 0 is OFF Channel 1 output On/Off status 1 is ON, 0 is OFF...
  • Page 144 LCD backlight On/Off Status 0 – Backlight ON, 1- Output mode Single/Multi status Backlight timer elapsed Always 0 System Reserved Channel 1 OVP flag status 1 is flag, 0 is no flag Channel 2 OVP flag status 1 is flag, 0 is no flag Channel 1 OCP flag status 1 is flag, 0 is no flag Channel 2 OCP flag status...
  • Page 145 Query: TRACK? Return String: Format: <state> VERsion? Description: Queries the firmware version Syntax: VERsion? Example: VERsion? Return String: 1.10 Format: <NRf> 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.
  • Page 146 VSET/VSET2 Description: This command is the same as VOLTage/VOLT2 command. See VOLTage/VOLT2 for details. Example: VSET? VSET 12.345 Format: <NRf> 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”.
  • Page 147 commands in order: PROG 1 Choose program number PROG:CLE Clear program 1 data PROG:REP 0 No repeat (repeat one time for “1”) PROG:TOTA 8 Set program 1 to have 8 steps in total PROG:STEP 1 Following 3 settings are for step 1 PROG:STEP:CURR 1 Set output current to 1 ampere PROG:STEP:VOLT 5...
  • Page 148 PROG:STEP:CURR 1 PROG:STEP:VOLT 0 PROG:STEP:ONT 0.1 Select next program to run after program PROG:NEXT 0 1 is complete, 0 means Stop PROG:SAV After edit, use Save command to store program 1 in the hardware 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...
  • Page 149 PROG:STEP 3 Settings for step 3 PROG:STEP:CURR 2 PROG:STEP:VOLT 20 PROG:STEP:ONT 0.5 PROG:STEP 4 Choose step 4 PROG:STEP:CURR 2 PROG:STEP:VOLT 10 PROG:STEP:ONT 0.5 PROG:STEP 5 Choose step 5 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...
  • Page 150 To execute example 2 sequence after example 1 sequence, then modify sequence of example 1 with NEXT 2 command. Send the following steps to modify and execute the program to generate a waveform sequence shown above. PROG 1 Select program 1 PROG:NEXT 2 Change the NEXT command from NEXT 0 to NEXT 2...
  • Page 151 Figure 30- Multi Unit Programming The following describes the specific commands that may be used to 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”.
  • Page 152 CADR CCLS CRST CIDN? CREV CSN? CST? CCLR CADR Note: This command must be used first prior to any other commands to control individually addressed power supplies with RS-485 connection. Description: Selects the address of the power supply to be controlled.
  • Page 153 supply. 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: CREV? Return String:...
  • Page 154 to control that unit’s output. CPV/CPV2 CMV?/CMV2? CPC/CPC2 CMC?/CMC2? CDVC?/CDVC2? COUT/COUT2 COUTA COV/COV2 COVP/COVP2 COC/COC2 COCP/COCP2 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...
  • Page 155 The selected power supply has a measured output voltage of 1.234 V. CPC/CPC2 Description: Configures/Queries the ISET current setting of the selected power supply. See CURRent/CURR2 command for similar syntax.CPC2 is for dual channel models only. Example: CPC 3.123 Sets the selected power supply’s ISET current setting to 3.123 A.
  • Page 156 COUT/COUT2 Description: Configures/Queries the output state of the selected power supply. See OUT/OUT2 command for similar syntax.COUT2 is for dual channel models only. Example: COUT ON Sets the selected power supply’s output to ON. COUT2? Queries the selected power supply’s second channel output state.
  • Page 157 COC/COC2 Description: Configures/Queries the over current protection value of the selected power supply. See OISET/OISET2 command for similar syntax. COC2 is for dual channel models only. Example: COC 3.000 Sets the selected power supply’s OCP value to 3.000 COC2? Queries the selected power supply’s second channel OCP value.
  • Page 158 Format: CV or CC Examples Here are a few examples of how to configure/query an instrument connected in the RS-485 chain. Query the IDN information for power supply with address 3 CADR 3 CIDN? Configure ISET current of a dual channel supply with address 10 to 1.234 A.
  • Page 159 connected in the RS-485 chain at once. Note that these commands will not return an “OK” string upon making a configuration. GRST GCLS GCLR GPV/GPV2 GPC/GPC2 GOUT/GOUT2 GOUTA GOV/GOV2 GOVP/GOVP2 GOC/GOC2 GOCP/GOCP2 GRST Description: Resets all the power supplies connected in the chain to a known state.
  • Page 160 Description: Configures/Queries the VSET voltage setting of all the power supplies connected in the chain. See VOLTage/VOLT2 command for similar syntax. GPV2 is for dual channel models only. Example: GPV 15.698 Sets all the power supplies’ VSET voltage setting to 15.698 V.
  • Page 161 OVSET/OVSET2 command for similar syntax. GOV2 is for dual channel models only. Example: GOV 70.000 Sets all the power supplies’ OVP value to 70.000V. GOVP/GOVP2 Description: Configures/Queries the over voltage protection state of all the power supplies connected in the chain. See OVP/OVP2 command for similar syntax.
  • Page 162 Control Commands), the return string will be “OK”. If otherwise, an error message will occur. See the tablebelow for the list of errors and their descriptions. Table 10- Error List for Multi Unit Programming Return String Description Time out Wait response time has timed out Range error Input value is out of range More than one master is in the...
  • Page 163 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 164 under test), which causes a drop in voltage. To minimize this 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.
  • Page 165 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 166 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 0–35V/0–3A High Range 0–20V/0–5A...
  • Page 167 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 230VA 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 168 Current ≤ 0.01%+250uA Ripple and Noise (20Hz-20MHz) ≤ 0.35mVrms/≤ 3mVpp (9171,9173,9181,9182) Normal Mode Voltage ≤ 0.5mVrms/≤ 5mVpp (9172,9174,9183) ≤ 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)
  • Page 169 Programming and Readback Accuracy ±(% output+offset) ≤ 0.05%+5mV(9171,9173,9181, 9182) ≤ 0.05%+10mV(9172,9174,9183) Voltage ≤ 0.05%+50 mV(9184) ≤ 0.05%+100mV(9185) ≤ 0.1%+2mA (9171,9173,9181,9183) ≤ 0.1%+1mA (9172,9174,9184) Current ≤ 0.1%+5 mA (9182) ≤ 0.1%+0.1 mA (9185) Temperature Coefficient per ° C ± (% output+offset) ≤ 0.005%+1mV Voltage ≤...
  • Page 170 ≤ 30mS (9184) ≤ 40mS (9185) ≤ 8mS (9171,9173,9181,9182) ≤ 10mS (9172,9174,9183) Rising Time at No Load ≤ 30mS (9184) ≤ 40mS (9185) ≤ 8mS (9171,9173,9181,9182) ≤ 10mS (9172,9174,9183) Falling Time at Full Load ≤ 30mS (9184) ≤ 40mS (9185) Falling Time at No Load ≤...
  • Page 171 7 Calibration Access Calibration Menu Follow the steps below to access the calibration menu. 1. Press , then to enter CALIBRATION. The Menu following screen will be displayed: PLEASE KEYIN PASSWORD : _ 2. Enter the password: 13579 with the numeric keypad. 3.
  • Page 172 “–S” terminal using the included shorting bars/pins. The following equipment is required for the calibration procedure: • 6 ½ digit precision digital multimeter • Shunt for current calibration (Necessary if the maximum output current of the power supply is greater than the maximum current the multimeter is capable of measuring) •...
  • 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 3. The power supply will output a pre-set current to the DMM. Wait for the DMM reading to settle, then enter it into where it shows 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.
  • Page 175 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 2. Select the channel (for dual channel models), then press Enter The calibration process will automatically start. 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.
  • Page 177 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 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 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 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 © 2014 B&K Precision Corp. Printed in Taiwan v072814...

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