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Vitrek Xitron 6000-2 User Manual

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USER'S GUIDE
6000-2 & 6000-3
Phase Angle Voltmeters

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Summary of Contents for Vitrek Xitron 6000-2

  • Page 1 USER’S GUIDE 6000-2 & 6000-3 Phase Angle Voltmeters...

  • Page 3: Warranty

    This Vitrek instrument is warranted against defects in material and workmanship for a period of two years after the date of purchase. Vitrek agrees to repair or replace any assembly or component (except batteries) found to be defective, under normal use, during the warranty period.
  • Page 4 In the interest of continued product development, Vitrek reserves the right to make changes in this guide and the product it describes at any time, without notice or obligation.

  • Page 5: Table Of Contents

    Contents Contents Warranty_________________________________________________ 3 Introduction _____________________________________________ 11 Features _________________________________________________11 Principles of Operation _____________________________________12 Central Processor _______________________________________ 12 Signal Conditioning and DSP Sections ______________________ 13 Input Scaling___________________________________________ 14 Amplitude Measurement Circuitry and DSP __________________ 14 Frequency Measurement _________________________________ 15 Range/Mode Control ____________________________________ 15 Sample Clock Generation _____________________________ 15 Filter Clock Generation _______________________________ 16 Front Panel Operation _____________________________________ 17...
  • Page 6 6000-2 & -3 User Guide, Rev E Making Input Connections___________________________________24 Guard Connections ______________________________________ 24 Input Cables ___________________________________________ 25 Using the Operational Keys __________________________________25 Changing Displayed Information or Settings __________________ 25 Setting Defaults ________________________________________ 27 Entering New or Changed Information ______________________ 30 Setting/Formatting Time &...
  • Page 7 Contents Parameter Display Menus ___________________________________50 Parameter (p) __________________________________________ 50 Reference Parameter (r) __________________________________ 54 Reference Parameter Type ________________________________ 54 Data Result Units _______________________________________ 54 Comparison Limit_______________________________________ 55 Filter Time Constant_____________________________________ 56 Some Useful Hints ______________________________________ 56 Showing Percentages & dB Changes _____________________ 56 Unstable Displayed Results ____________________________ 57 Display Line Format _______________________________________57 Nullmeter Scale Menu ______________________________________58...
  • Page 8 6000-2 & -3 User Guide, Rev E High Speed Operation ______________________________________85 Measurement Periods ____________________________________ 85 Frequency Measurement _________________________________ 85 Harmonic Measurement __________________________________ 85 Interrogating Results ____________________________________ 85 Maintenance & Calibration _________________________________ 87 Daily Maintenance _________________________________________87 Low Level DC Measurements _____________________________ 87 Procedure without Equipment __________________________ 87 Procedure with Equipment_____________________________ 88 External Calibration ________________________________________89...
  • Page 9 Contents Figures Figure 1. System Block Diagram _______________________________________ 12 Figure 2. Digital Signal Processing Block Diagram _________________________ 13 Figure 3. Sample Clock_______________________________________________ 16 Figure 4. The 6000-3 Voltmeter Front Panel ______________________________ 17 Figure 5. Display Showing Results Data _________________________________ 18 Figure 6.
  • Page 10 6000-2 & -3 User Guide, Rev E ØTo store a configuration in an already defined storage area:_________________ 33 ØTo store a new configuration (presently displaying): ______________________ 33 ØTo recall a configuration:____________________________________________ 34 ØTo rename an existing storage area:____________________________________ 34 ØTo delete a storage area: ____________________________________________ 34 ØTo manually prompt the repacking of storage areas:_______________________ 35 ØSetting fundamental frequency mode and range for input connectors: _________ 39 ØSetting the input mode for each input connector: _________________________ 41...

  • Page 11: Introduction

    Introduction Congratulations on purchasing one of the high technology signal analysis instruments available from Vitrek. The 6000 family of Phase Angle Voltmeters offers the utmost in accuracy and flexibility. These instruments contain an automatic switching power supply, thus no changes are required for local AC supply voltage or frequency variations, simply select the power cord extension that connects to your supplied power.

  • Page 12: Principles Of Operation

    6000-2 & -3 User Guide, Rev E • Fully customizable display window. Shows 4 lines at a time and is scrollable to 50 lines. • High resolution bargraph contains 101 elements and two supporting interface keys. • Both voltage and current input capabilities on each input, which allows for high accuracy power measurements from a few nanowatts to hundreds of watts.

  • Page 13: Signal Conditioning And Dsp Sections

    Introduction The software run by this processor is stored in flash memory, allowing the instrument’s software to be field upgradeable without requiring removal of the covers or any circuitry. The interface of this processor to the interface components: IEEE488, (2) RS232 and Parallel Printer is via the processor’s native bus interface. This bus interface uses standard commercial integrated circuits for hardware.

  • Page 14: Input Scaling

    6000-2 & -3 User Guide, Rev E These sections also provide the primary isolation between the grounded digital circuitry of the instrument and the floating input circuitry via an optical isolation barrier, which passes digital signals only. Each of these sections is capable of operating independently, or can be “joined” to one or both of the other sections to perform simultaneous sampling, as required, by the central processor.

  • Page 15: Frequency Measurement

    Introduction The channel’s circuit board with this harmonic analysis DSP is internally named the "Amplitude DSP". Frequency Measurement Each scaled input passes to a second sub-system for additional analysis. This second sub-system is internally named the “Supervisor DSP” board and consists of the following portions: Filter and High Speed ADC—...

  • Page 16: Filter Clock Generation

    6000-2 & -3 User Guide, Rev E frequency is settable with 20-bit resolution over a 2:1 range of frequencies. This clock signal is available to all amplitude DSP systems on one of three such signal lines. If desired by the central processor, the supervisory processor can “link” this frequency to that of either of its measured input frequencies.

  • Page 17: Front Panel Operation

    Front Panel Operation Front Panel Operation This section includes a description of the front panel interface features of the Phase Angle Voltmeter instruments and their basic operation. Refer to Configuration Control for an explanation of the menus. Front Panel Operational Features The 6000-2 and -3 Phase Angle Voltmeter instruments have a number of controls and indicators available.

  • Page 18: Display Select Keys

    6000-2 & -3 User Guide, Rev E Figure 5. The instrument’s display can show (up to) four lines of information at one time and maintains up to fifty lines of displayable measurement results, which are accessible by scrolling. You can add or delete lines, as necessary. The display is the interface focus, as it responds to all front panel key presses, showing the options available for that key.

  • Page 19: The Up And Down Arrow Keys

    Front Panel Operation The Up and Down Arrow Keys The é and ê keys (up and down arrows) are part of the keypad. Use these keys: DATA ENTRY • For scrolling the display Results Data lines, one line at a time; •...

  • Page 20: Numeric Entry Keys

    6000-2 & -3 User Guide, Rev E Numeric Entry Keys DATA ENTRY These keys are part of the keypad: DATA ENTRY • Use the numbered keys to enter numerical data into the display. • Use the (minus sign) to enter negative –...

  • Page 21: Setup Key

    Use to enable the ê key to scroll the RECALL display to the lowermost menu lines. • Use to perform “covers-on” software SETUP LOCAL upgrades. Note: Contact Vitrek for specific details to perform software upgrades. Local Key & Indicator key is part of the keypad. LOCAL CONTROL •...

  • Page 22: Calibration Key

    6000-2 & -3 User Guide, Rev E Calibration Key key, is used to perform the following tasks: • Display the present status of the instrument: CONTROL Model Options fitted Software version # of days since last calibration PRINT STORE Status of the internal multiprocessor communications and memory checks.

  • Page 23: Input Connector Keys & Indicators

    Front Panel Operation key allows you to select the: NULLMETER SCALE • Scaling type: dot or bar; • Linearity: linear or logarithmic; • Zero position: left, centered, or mirrored around the center. Note: The center zero position, log-scaled format provides a useful adjustment capability of “coarse/medium/fine”.

  • Page 24: Making Input Connections

    6000-2 & -3 User Guide, Rev E View the respective connector’s indicator lights to determine, which input is being: • Measured ( IN USE • Used for fundamental frequency determination ( SYNC • Scaled ( SCALED • Overloaded ( ). The instrument automatically protects itself against OVERLOAD serious overload, even when held on the most sensitive input range Notes:...

  • Page 25: Input Cables

    Front Panel Operation Input Cables Signal input connections are made to the front panel BNC connectors, using the connector for each input as desired. Each input is configured, such that the outer shell of the connector is the input (negative) connection, and the central pin is the input (positive) connection.

  • Page 26: Figure 8. Display Line Configuration Data

    6000-2 & -3 User Guide, Rev E key again to place the cursor in the display. If you press the DISPLAY SELECT ENTER key twice the new data is applied and the display shows the Results Data. Figure 8. Display Line Configuration Data Ø...

  • Page 27: Setting Defaults

    Front Panel Operation Setting Defaults Ø To set defaults: Important Note: This action applies to all configured Results Data display lines. Store any preferred setups before performing this step. 1. Press the key. SETUP 2. Press the key correlating to Set Defaults . The defaults will DISPLAY SELECT automatically apply.

  • Page 28: Øto Abort A Displayed Menu And Discard Any Changes

    6000-2 & -3 User Guide, Rev E The default Nullmeter Scaling screen is: NULLMETER SCALING 0 to 1 = + 180.000 Centered The default Setup Measurements are as follows: Fundamental Frequency Fund: Measured Fundamental Frequency Range Fund: 40.0 – 500 Hz Fundamental Source From: Nom Amplitude Measurement Period...

  • Page 29: Øto Adjust A "Noisy" Measurement (To A Given Value)

    Front Panel Operation Note: These parameters: gain (ratio), real (in phase), imaginary (quad), and phase have a primary input, a reference input and a harmonic specification. Since the 6000 instrument family has no dedicated reference input or harmonic specification, it offers greater flexibility in usage. •...

  • Page 30: Entering New Or Changed Information

    6000-2 & -3 User Guide, Rev E Ø To add display lines (up to 50 lines possible): 1. Scroll the Results Data display until a blank line shows. 2. Press the key next to the blank line. As a starting condition, the DISPLAY SELECT display will show the next line number with the same parameter/configuration menu as the previous line.

  • Page 31: Setting/Formatting Time & Date

    Front Panel Operation Ø To “enter” data and changes into the menu—when no cursor is visible: • Press the key to “enter” the selections contained in a menu display. The ENTER instrument will replace the menu display with the selected measurement Results Data, based on the menu entered.

  • Page 32: Storing & Retrieving Configurations

    6000-2 & -3 User Guide, Rev E Ø To format the time display: 1. From the Set Time and Date menu, press the key next to the DISPLAY SELECT Time Format line. 2. Repeated presses of the corresponding key will toggle the DISPLAY SELECT display between the two choices of: 12 Hour and 24 Hour .

  • Page 33: Store & Recall Memory Menus

    Front Panel Operation Store & Recall Memory Menus The lowermost two lines of the STORE MEMORY menu and the RECALL MEMORY menu show the presently defined storage areas. The storage area number that has an * (asterisk) character adjacent to it, is the area that was last accessed. You can use é or ê...

  • Page 34: Storage Area Maintenance

    6000-2 & -3 User Guide, Rev E Ø To recall a configuration: 1. Press the key. RECALL 2. Use the é or ê keys to scroll through the numerically ordered list of defined storage areas. 3. When the desired storage area number displays, press the corresponding key.

  • Page 35: Repacking Of The Storage Areas

    Front Panel Operation 4. Press the key, which corresponds to the Delete menu line. A DISPLAY SELECT 3 message saying Deleted Memory will show and your display return to Results Data. Note that if you have chosen a storage number that reflects your active settings, the number will not delete.
  • Page 36 6000-2 & -3 User Guide, Rev E...

  • Page 37: Rear Panel

    Rear Panel Rear Panel Connectors & Controls The rear panel contains the power cord connection; Configuration Control switch and four connectors: Analog output, Digital I/O, Parallel printer, IEEE-488, and two RS232. Refer to Figure 9. CONFIGURATION LOCKED UNLOCKED Figure 9. Rear Panel Partial View...

  • Page 38: Power Connection

    6000-2 & -3 User Guide, Rev E Power Connection The 6000 instrument is designed to operate with a three-conductor power cord. The third conductor is securely connected to ground to ensure the external chassis of the instrument remains at ground potential. Warning: Operation with a two-conductor power cord, or without a secure ground connection may render the Phase Angle Voltmeter instrument unsafe for use.

  • Page 39: Configuration Setup

    Configuration Setup Configuration Setup The various menu selections available allow you to define the data configuration appropriate for testing your products. The menus that facilitate setup include: Setup Measurements, Input Configure, the Parameter displays and if you wish to use the Nullmeter, the Nullmeter displays.

  • Page 40: Figure 11. Setup Measurements Display

    6000-2 & -3 User Guide, Rev E he first four display lines of the menu show the SETUP MEASUREMENTS fundamental frequency measurement type, range, and input source menu. See Figure 11. 4. On the second line, select the type of Fundamental Frequency .

  • Page 41: Figure 12. Input Configure Display

    Configuration Setup Ø Setting the input mode for each input connector: These settings select which signal, voltage or current, is going to be measured on which input. Additional settings in the display affect the range for voltage and current, Scaling and the Guard connection being internal or external. Note that when making these input settings you must call up the INPUT CONFIGURE display...

  • Page 42: Figure 13. Nullmeter Sample Display

    6000-2 & -3 User Guide, Rev E Ø To change the (input) scale factor: 1. While viewing the display for the respective input you are INPUT CONFIGURE configuring, press the key. DISPLAY SELECT 3 2. Enter the desired scale factor using the keypad.

  • Page 43: Input Configuration Menu

    Configuration Setup Ø To complete a configuration setup: 1. Connect the signal(s) to the respective BNC and terminals. GUARD 2. Apply signals. 3. Make any adjustments required to configuration. SETUP MEASUREMENT 4. Make adjustments, as needed to the parameter displays or the Nullmeter parameter displays.

  • Page 44: Measurement Configuration Menu

    6000-2 & -3 User Guide, Rev E Measurement Configuration Menu The Setup Measurements line of the key menu allows you to fully configure SETUP your instrument’s measuring characteristics according to each particular situation. The discussions below deal with each menu line in the same order as shown in the display menu.

  • Page 45: Fundamental Frequency Range

    Configuration Setup • You want to perform a spectral analysis of the input signal(s), rather than harmonic analysis. Note: When performing a spectral analysis, set the fundamental frequency to the desired frequency step between available spectral points, set the RBW ratio to 1, and set the maximum harmonic to the number of spectral points, desired.

  • Page 46: Nominal Amplitude Measurement Period

    6000-2 & -3 User Guide, Rev E • When selecting this input, or set of inputs, consider which input has the least noise content, the least amplitude variability, and the least cycle-to-cycle phase noise. —An example of a signal that should NOT be allowed to act as the fundamental frequency source is a RVD or LVD transformer’s output, which has its frequency shifted during the time it is moved—...

  • Page 47: Filter Frequency

    Configuration Setup Filter Frequency The Filter Frequency menu line is always active. This menu line reads as Filter: with a default frequency of It allows you to select a low-pass filter, used to limit 50kHZ. the input signal to the entered value before amplitude measurements. Note that this filter has no direct affect on frequency measurement.

  • Page 48: Fundamental÷Bandwidth

    6000-2 & -3 User Guide, Rev E Fundamental÷ ÷ Bandwidth The Fundamental÷BW is also known as RBW ratio. The RBW ratio default is This menu line sets the minimum number of fundamental frequency cycles the analysis is performed. In cases where a signal is known to have excellent frequency stability, and you desire superior inter-harmonic noise rejection, setting this ratio to a high value, such as, 20:1 is of benefit.

  • Page 49: Fundamental Frequency Averaging

    Configuration Setup Fundamental Frequency Averaging An accurate, noise free, measurement of the fundamental frequency is the basis for any high-resolution phase measurement. Thus some averaging, or filtering of the fundamental frequency measurement results, is desirable. However, averaging and filtering slows the instrument’s response to changes in frequency. •...

  • Page 50: Parameter Display Menus

    6000-2 & -3 User Guide, Rev E Parameter— This indicates that the result will be directly obtained from the measurement parameter defined in the second (p) line of the menu. Param-Ref— This indicates that the result will be the difference between the parameter defined in the second (p) line of the menu, minus the result of the third (r) line of the menu.
  • Page 51 Configuration Setup Rectify— Rectify in the menu means the average rectified amplitude (or mean modulus) of the selected input. Form Factor— FF in the menu means form factor of the selected input, such as, the ratio of the average rectified and true RMS amplitudes. Crest Factor—...
  • Page 52 6000-2 & -3 User Guide, Rev E Watts — This is the real power measured by the pair of inputs—Assuming one input is measuring voltage and other is measuring current—The “bandwidth” of the result AC+DC may be set as only, only, , or a range of harmonics (setting the same start and end harmonic yields the power at the given harmonic).
  • Page 53 Configuration Setup Load Z — This is the computed load impedance as measured by the pair of inputs. Assuming one input is measuring voltage and other is measuring current. The “bandwidth” of AC+DC the result may be set as only, only, , or a range of harmonics (setting the same start and end harmonic yields the Load Impedance at the given...

  • Page 54: Reference Parameter (R)

    6000-2 & -3 User Guide, Rev E Imag — This is the quadrature component of the selected input/harmonic pair. — This is the phase between the selected input/harmonic pair. Constant — This sets the value to what you have entered. Reference Parameter (r) Edit this line by pressing the corresponding key.

  • Page 55: Comparison Limit

    Configuration Setup key, then use the é and ê specifically press the corresponding DISPLAY SELECT keys to change the selection. Press the key when the desired unit is displayed. ENTER The available units are: Application Units of Measure / Notes Amps “A”...

  • Page 56: Filter Time Constant

    6000-2 & -3 User Guide, Rev E Filter Time Constant The parameter or deviation result may be filtered (averaged) with a single order filter have any user specified time constant in the range 0.01S to 10000S. Setting this value to zero, disables the filter. Change the filter time constant by pressing the corresponding key;...

  • Page 57: Unstable Displayed Results

    Configuration Setup Unstable Displayed Results Select for the result to be filtered by selecting the display line and setting the Filter: menu selection to a non-zero time constant. A value of 1 or 2 seconds is usually suitable for frequencies above 10Hz. Set a value proportionately longer for lower frequencies.

  • Page 58: Nullmeter Scale Menu

    6000-2 & -3 User Guide, Rev E The following terms may display in a message: Invalid— This is displayed if the parameter or deviation defined for the display line had invalid syntax. This generally can only be displayed when the display line’s contents was defined via an interface, the display line definition menu maintains correct format for this definition.

  • Page 59: Type

    Configuration Setup Type TYPE menu line allows you to select the type of nullmeter that will be used. The type is selected by a combination of three settings, which are displayed in this menu line. From left to right, these are: Dot or Bar type: •...

  • Page 60: Additional Application Examples

    6000-2 & -3 User Guide, Rev E • Mirrored This selection is similar to Centered, but is mirrored around the central position. Note that this yields increased visibility for null detection, at the cost of not knowing polarity. These settings may be altered by: 1.

  • Page 61: Øto Measure Harmonic Content, Or Wideband Amplitudes Synchronously

    Configuration Setup 3. Set the Min Period: menu selection to the desired update interval. The recommended setting is the longer time: 250mS or 4 periods of the minimum fundamental. 4. Set the Filter: menu selection to eliminate any undesired high frequency signal content.

  • Page 62: Øto Perform Spectral Analysis Of The Input Signal

    6000-2 & -3 User Guide, Rev E 3. If the fundamental frequency is above 500Hz, or the default 50kHz filter cutoff frequency is undesirable, —Then— Change the Filter: menu selection to LOW-PASS FILTER CUTOFF FREQUENCY 4. In the Max Harmonics: menu selection set the harmonic to or if no harmonic analysis is required, set it to 5.

  • Page 63: Interface Operation

    Interface Operation Interface Operation The 6000 instrument family has optional IEEE488 and RS232 interfaces, which may be configured to allow the instrument to be both controlled and interrogated by a computer. Both interfaces operate in a similar manner, using the same command set. There are two operational differences between these interfaces: •...

  • Page 64: Ieee488 Interface Setup

    6000-2 & -3 User Guide, Rev E IEEE488 Interface Setup Throughout this section of the manual, the use of a National Instruments AT-GPIB® IEEE488 controller board in an IBM AT (or compatible) is assumed. If you are using a different controller or a controller card from another vendor, then the exact methods used will differ from those shown.

  • Page 65: Configuring The Controller Card

    Interface Operation 2) The only command that may hold the bus handshake for longer than 20mS is the device clear command. If this command is not used, then even shorter timeout periods can be used to detect a failure. The device clear command may hold the bus handshake for up to one second.

  • Page 66: Configuring The Controller Software

    IEEE488 bus. The selections shown in Table 2 are only for data transfers regarding the controller card itself. Thus other settings may be used, but have not been fully tested by Vitrek. Table 2. Controller Card Configuration (GPIB0) Primary Address...

  • Page 67: Interrogating The Data

    3) Timings of longer than this are also valid. The 350nS selection has been tested on shorter cable lengths by Vitrek. and may be used. However, in normal operation there is little overall performance gain by using it with these instruments. A shorter time may be selected, if, other high-speed devices exist in the system.

  • Page 68: Sending Data

    6000-2 & -3 User Guide, Rev E In the IEEE488 interface, the controller may immediately attempt to read the requested data, the controller will then be held for a short delay (typically less than 1mS) until the requested data is available, then the requested data will be read by the controller.

  • Page 69: Rs232 Interfacing

    Interface Operation RS232 Interfacing The RS232 interface is configured to use the RS232 hardware “handshake” lines RTS and CTS to handshake data. The usage of these hardware "handshake" lines ensures that data will not be lost due to different speeds in the instrument and the computer.

  • Page 70: Application For The Lower Case Portions Of Commands

    6000-2 & -3 User Guide, Rev E Device Clear— The IEEE488 defined functions (both selective and global) force DEVICE CLEAR the instrument to perform a power-on reset function. Interface Clear— The IEEE488 standard defines this command, which causes the interface portion of the instrument to be reset to the power on conditions, aborting any bus activity in progress.

  • Page 71: Command Set

    Interface Operation Command Set The various features of the instrument may be controlled by the controller sending certain command “strings” to the instrument. The features include: • Distribution of “space” and non-printing characters between commands throughout the command string. • The ability to use either lower or upper case characters.
  • Page 72 6000-2 & -3 User Guide, Rev E MAXHARM— This integer defines the highest harmonic number which is to be made available, this overrides any requests for higher harmonics by individual parameter requests. Setting this to 0 disables FFT based harmonic analysis for this group. BANDWIDTH—...
  • Page 73 Interface Operation HARM=string— This command sets the measuring harmonic signal content as defined by string. See also the FFT and FUND commands. Valid string contents: • OFF—no harmonic analysis is performed within the group. The FFT command has no affect with this setting. •...

  • Page 74: Available Parameter Strings

    6000-2 & -3 User Guide, Rev E RECALL=n— This commands the instrument to reset the configuration to that contained in the specified storage location. The number n should be between 0 and 65535. Note that this also sets, which saved configuration will be retrieved following a reset of the instrument.

  • Page 75: Retrieving Parameters

    Interface Operation source and bandwidth— Is a series of strings or numeric data defining the source and bandwidth for the parameter, this string is surrounded by “[ and ]” (square brackets). sub-definition string— Is an optional string, enclosed by “{ and }” (curly braces), containing optional additional operations to be performed on the parameter result.
  • Page 76 6000-2 & -3 User Guide, Rev E DPF— Dissipation or Displacement Power Factor (i.e. W/VA at the fundamental frequency only). This parameter requires a input or group of inputs. The default units for this result is none. EPA— The inverse cosine of Power Factor. This parameter requires an input or group of inputs, and either a string bandwidth or a pair of integers defining the harmonic range for the data.
  • Page 77 Interface Operation IMAG— The quadrature portion of a signal (Volts or Current). This parameter requires a single input source and single integer harmonic, and a single reference source and single integer harmonic. Both inputs should belong to the same group for the result to be meaningful.
  • Page 78 6000-2 & -3 User Guide, Rev E PWR— True Power. This parameter requires an input or group of inputs and either a string bandwidth or a pair of integers defining the harmonic range for the data. The default units for this result is W. QUAD—...

  • Page 79: Source And Bandwidth Strings

    Interface Operation THDF— The Total Harmonic Distortion of the selected signal (Volts or Current), relative to its fundamental component. This parameter requires a single input source and a single integer defining the highest harmonic to include in the summation. The default unit for this result is none (i.e.

  • Page 80: Sub-Definition Strings

    6000-2 & -3 User Guide, Rev E S—Input SYNC AB—Input pair A and B. I, IN or INPUT—The total of all inputs defined as measuring input parameters. O, OUT or OUTPUT—The total of all inputs defined as measuring output parameters. DC—The DC component only of a parameter.

  • Page 81: Special Parameter Strings

    Interface Operation RATIO— Sets that the ratio between the parameter and the reference or nominal value is to be obtained. A nominal string must be present. However, use only one of DELTA, RATIO, DELTAR or LIMIT formats for a single parameter. DELTAR—...

  • Page 82: Id Data Format

    6000-2 & -3 User Guide, Rev E ID (READ= only)— Defines that a string defining the instrument and software revisions are to be returned. See ID Data Format. ID Data Format READ=ID— Returns data having the following sub-strings, separated by comma characters. 6000: nn.nn main software revision.
  • Page 83 Interface Operation dBmW—Power decibels rel. to 1mW level dBuV—Voltage decibels rel. to 1µV level dBV—Voltage decibels rel. to a 1V level dBW—Power decibels rel. to a 1W level deg360—degrees (0-360° range) deg—degrees (±180° range) grad—grads HP—Horse Power Hr—Hours Hz—Hertz ohm—Ohms pirad—pi-radians (1 is equiv.

  • Page 84: Full-Parameter Definition Format

    6000-2 & -3 User Guide, Rev E Full-Parameter Definition Format This section shows some examples of full-format parameter definitions. These may be used to define individual items to be interrogated via the interface (i.e. in a READ= command) or to define a display line (i.e. in a DISP[n]= command). In the case of the READ= command, multiple items may be defined for interrogation at the same time (up to 30 items) by separating each parameter definition by the: (colon) character.

  • Page 85: High Speed Operation

    Interface Operation High Speed Operation The 6000 instrument family has the capacity to operate at over 100 readings per second when correctly configured. This section covers some useful information concerning achieving the highest possible speed from these instruments. Measurement Periods The highest possible reading rates are obtained when only those inputs, which are required to be high speed are configured with short measurement periods.
  • Page 86 6000-2 & -3 User Guide, Rev E...

  • Page 87: Maintenance & Calibration

    Maintenance & Calibration Maintenance & Calibration This chapter discusses the procedures you can use to ensure your instrument remains optimally functional. They include routine maintenance and calibration. Daily Maintenance For optimum DC offset performance, perform an Input Calibration sequence at daily intervals, or following 5°C + temperature changes.

  • Page 88: Procedure With Equipment

    Note that Vitrek recommends 1 year, or 365 days If any of these numbers show “?” or “req”, it indicates the instrument has “lost”...

  • Page 89: External Calibration

    6000 instrument is overdue for calibration against certified standards. Note that Vitrek recommends 1 year, or 365 days. —If—any of these numbers show ? or req, then this indicates that the instrument has “lost”...

  • Page 90: Preparation For Calibration

    6000-2 & -3 User Guide, Rev E Preparation for Calibration Prior to performing the external calibration procedure, perform the following actions: 1. Continuously power the 6000 instrument in the calibration environment for at least 1 hour before attempting calibration. 2. Ensure that all input connectors and cable connectors are clean and free of corrosion.

  • Page 91: Required Equipment

    Maintenance & Calibration Required Equipment Vitrek recommends the use of a Fluke 5700A+5725A with wide band option as the calibration standard for external calibration of the 6000 instrument. This equipment should have its wideband output (50Ω) previously calibrated at the desired frequency and output levels into a known 50Ω...
  • Page 92 6000-2 & -3 User Guide, Rev E • Ensure that the correct input connector is used for each step, all voltage calibration steps use the respective V BNC connector, while all current calibration steps use the respective A BNC connector. •...

  • Page 93: Performing A Partial Calibration

    Maintenance & Calibration Press the key to step to the next calibration step. When the DISPLAY SELECT 1 uppermost display line indicates Ext. Cal . Completed , this external calibration procedure is completed. 10. When the procedure is complete, then the uppermost display line indicates Ext. Cal.
  • Page 94 6000-2 & -3 User Guide, Rev E...

  • Page 95: Appendix A: Aio Option

    Appendix A Appendix A: AIO Option The AIO Option is an Analog Output, providing 12 analog interface outputs driven from a single, multiplexed, 16-bit digital-to-analog converter. This sub-system is controlled by a single Motorola DSP56001 24-bit processor, which is interfaced to the central processor via an internal high speed RS485 data link.
  • Page 96 6000-2 & -3 User Guide, Rev E To force the analog output (n), a possible 0 to ANALOG[n]=numeric 11, to the specified output level, 1.0 to + 1.0, which yields an output level between fullscale and + fullscale. Upper-case portions = command operator / lower case portions = optional parameter(s).

  • Page 97: Appendix B: Specifications

    Appendix B Appendix B: Specifications Unless otherwise indicated, all accuracy specifications given in this chapter are valid throughout the specified operating temperature range, for a period of 1 year, following a 30 minute warm-up period, and are relative to routinely performed Calibration Standards.

  • Page 98: Current Input

    6000-2 & -3 User Guide, Rev E 300mS ± 2% when V(ac) mode selected. Input Time Constant: Overall CMRR: >160dB at F<100Hz: 20dB/decade. CMRR (Input:Guard): >80dB at F<1kHz: 20dB/decade. Current Input Ranges: 750mA, 250mA, 75mA, 25mA, 7.5mA, 2mA, 0.6mArms, autoranging or fixed. Frequency Range: 0.0005Hz to 200kHz.

  • Page 99: Fundamental Frequency Measurement

    Appendix B Mode Effect: Add (0.04 + 5F/F )° for voltage: current phase. Ranging Effect: Add (0.02 + 3F/F )° per range difference between inputs. Fundamental Frequency Measurement Accuracy: 0.01% + (0.03% divided by measurement period in seconds). Min. Fundamental: 5% of range.

  • Page 100: Peak Parameters

    6000-2 & -3 User Guide, Rev E Peak Parameters Min. Impulse Width: Repetitive: 500nS, >100 impulses / measurement. Single: 4µS Accuracy: As relevant input accuracy specifications at the frequency of the impulse (use 1/impulse period if unknown). Valid for impulse frequency <...
  • Page 101 Appendix B...

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Xitron 6000-3

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