Fluke 5790B Operator's Manual
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Fluke 5790B Operator's Manual

Ac measurement standard
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Via Acquanera, 29
22100 Como
tel. 031.526.566 (r.a.) fax 031.507.984
info@calpower.it
www.calpower.it
June 2015
© 2015 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
5790B
AC Measurement Standard
Operators Manual

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  • Page 1 22100 Como tel. 031.526.566 (r.a.) fax 031.507.984 info@calpower.it www.calpower.it 5790B AC Measurement Standard Operators Manual June 2015 © 2015 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
  • Page 2 Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price.

  • Page 3: Table Of Contents

    AC Secondary Performance .............. 1-16 DC Secondary Performance .............. 1-18 Operating Characteristics ..............1-19 AUX Input Characteristics ..............1-20 Absolute Wideband Specifications (5790B/3, 5790B/5, and 5790B/AF) 1-20 Installation ................... 2-1 Introduction .................... 2-1 Unpacking and Inspection ..............2-1 Environmental and Input Requirements ..........2-2 Placement and Rack Mounting..............
  • Page 4 View Reference Softkey ..............4-24 Choose Delta Units ................4-24 Instructions for Current Measurements ..........4-25 Current Measurements with the Fluke A40B ........4-25 Overview ..................4-25 Connect an A40B ................4-26 Set Up a Fluke A40B Shunt ............4-27 Measure with a Fluke A40B Shunt ..........
  • Page 5 Contents (continued) Set up a Fluke A40/A40A or Custom Current Shunt ..... 4-30 Measure with a Fluke A40, A40A or Custom Shunt ...... 4-31 Instructions for Wideband Measurements ..........4-31 Techniques for Reducing Transfer Errors ..........4-32 DC Reversal ..................4-32 Loading ....................
  • Page 6 5790B Operators Manual Alphabetical List of 5790B Device-Dependent Commands ....6-24 Local-to-Remote State Transitions ............6-71 Checking Product Status ............... 6-72 Status Byte Register (STB) ............... 6-75 Service Request Line (SRQ) ............6-76 Service Request Enable Register (SRE) ........6-76 Programming the SRE ..............
  • Page 7 Page 1-1. Symbols ..................... 1-4 2-1. Standard Equipment .................. 2-2 2-2. Line Power Cord Types Available from Fluke ........... 2-4 3-1. Front Panel Features ................. 3-2 3-2. Rear Panel Features ................. 3-5 4-1. Power-Up State Defaults and Volatility ............. 4-2 4-2.
  • Page 8 5790B Operators Manual...
  • Page 9 List of Figures Figure Title Page 2-1. Line Power Cord Types Available from Fluke ........... 2-4 2-2. Line Power Label and Switch Location ............. 2-5 3-1. Front Panel ....................3-1 3-2. Rear Panel ....................3-4 4-1. Recommended Test Lead Connections to Test a Voltmeter ..... 4-11 4-2.
  • Page 10 5790B Operators Manual viii...

  • Page 11: Introduction And Specifications

    10 Hz to 1 MHz. A wideband voltage option extends frequency range to 30 MHz (Option 5790B/3) or 50 MHz (Option 5790B/5 and 5790B/AF). The Product is also compatible with Fluke A40, A40A, and A40B current shunts, enabling current measurements in both measurement mode or transfer mode up to 100 A.

  • Page 12: How To Contact Fluke Calibration

    5790B Operators Manual How to Contact Fluke Calibration To contact Fluke Calibration, call one of the following telephone numbers: • Technical Support USA: 1-877-355-3225 • Calibration/Repair USA: 1-877-355-3225 • Canada: 1-800-36-FLUKE (1-800-363-5853) • Europe: +31-40-2675-200 • Japan: +81-3-6714-3114 • Singapore: +65-6799-5566 •...
  • Page 13 Introduction and Specifications Safety Information • Do not operate the Product with covers removed or the case open. Hazardous voltage exposure is possible. • Do not use an extension cord or adapter plug. • Make sure that the space around the Product meets minimum requirements.

  • Page 14: Symbols

    Product automatically: 1. Compares the heating effect of the incoming signal to that of the Product internal dc source, through the Fluke rms sensor. This method results in direct detection of true rms value. 2. Adjusts the internal dc source for a null at the output of the rms sensor, in the process eliminating many sources of error.

  • Page 15: An Overview Of The Features

    Signals accepted are from 700 μV to 7 V over a frequency range of 10 Hz to 30 MHz (Option 5790B/3) or 50 MHz (Option 5790B/5 or 5790B/AF). Only the lower eight Product voltage ranges are used by the WIDEBAND input.

  • Page 16: Instruction Manuals

    Technical Service Center for instructions. See How to Contact Fluke Calibration. To reship the Product, use the original shipping container. If the original carton is not available, then a new container can be ordered from Fluke Calibration. See How to Contact Fluke Calibration if necessary.

  • Page 17: Specifications

    Specifications are valid after allowing a warm-up period of 30 minutes, or twice the time the 5790B has been turned off, whichever is less. For example, if the 5790B has been turned off for 5 minutes, the warm-up period is 10 minutes. To simplify evaluation of how the 5790B covers your workload, use the Absolute Specification.

  • Page 18: General Specifications

    5790B Operators Manual General Specifications Warm-up Time ..........30 minutes or twice the time the 5790B has been turned OFF. Relative Humidity Operating ............ ≤80 % to 30 °C, ≤70 % to 40 °C, ≤40 % to 50 °C Storage ............<95 % non-condensing. A power stabilization period of 4 days may be...

  • Page 19: Resolution And Range Limits

    Introduction and Specifications Resolution and Range Limits Resolution and Range Limits Resolution Autorange Limits Voltage Range Upper Lower Filter Fast Filter Med/Slow 2.2 mV 2.2 mV 600 μV 0.1 μV 0.1 μV 7 mV 7 mV 1.9 mV 0.1 μV 0.1 μV 22 mV 22 mV...
  • Page 20 5790B Operators Manual ±5 °C of Calibration Temperature AC/DC Transfer Measurement Mode ± (ppm of Reading + μV) Voltage Range Frequency Range Mode ± ppm 90 Days 1 Year 2 Years 2 Years 240 + 1.5 240 + 1.5 240 + 1.5...
  • Page 21 Typical specification, as determined by sourcing with the Fluke 5205A Precision Power Amplifier. Inputs >30 kHz and >750 V are typical, as determined by sourcing with the Fluke 5205A Precision Power Amplifier. Note: The Product is to be used in controlled environments. For disturbances on the mains power supply of >0.5 Vrms from 10 MHz to 40 MHz, add 5 ppm to the 2.2 V range.

  • Page 22: Relative Ac Voltage

    5790B Operators Manual Relative AC Voltage ±5 °C of Calibration Temperature Voltage Measurement Mode ± (ppm of Reading + μV) AC/DC Transfer Frequency Range Range Mode ± ppm 2 90 Days 1 Year 2 Years Years 10 Hz - 20 Hz 100 + 1.3...
  • Page 23 Inputs >100 kHz and with a V*Hz product >2.2E7 are typical. Typical specification, as determined by sourcing with the Fluke 5205A Precision Power Amplifier. Inputs >30 kHz and >750 V are typical, as determined by sourcing with the Fluke 5205A Precision Power Amplifier. 1-13...

  • Page 24: Absolute Ac Non-Sine Voltage

    5790B Operators Manual Absolute AC Non-sine Voltage 1-Year, tcal ±5 °C, Range Frequency Range ±(% of reading + µV) 10 Hz - 45 Hz 0.1 + 1.3 45 Hz - 1 kHz 0.1+ 1.3 2.2 mV 1 kHz - 20 kHz 0.17+ 1.3...

  • Page 25: Absolute Dc Voltage

    Introduction and Specifications Electrical Specifications Absolute DC Voltage ± 5 °C of Calibration Temperature Measurement Mode ± (ppm of Reading + μV) Voltage Range 90 Days 1 Year 2 Years 37 + 1.5 38 + 1.5 43 + 1.5 220 mV 31 + 1.5 33 + 1.5 38 + 1.5...

  • Page 26: Secondary Electrical Specifications

    5790B Operators Manual Secondary Electrical Specifications Secondary performance specifications and operating characteristics are included in uncertainty specifications. They are provided for special calibration requirements such as stability or linearity tests. AC Secondary Performance Temperature Coefficient 24 Hour AC 0 °C to 10 °C Stability ±...
  • Page 27 Introduction and Specifications Secondary Electrical Specifications Temperature Coefficient 24 Hour AC 0 °C to 10 °C Stability ± 1 °C Voltage Input 10 °C to 40 °C Frequency Range 40 °C to 50 °C Range Resistance Slow Filter Peak- Peak ± μV ppm / °C 10 Hz - 20 Hz 20 Hz - 40 Hz...

  • Page 28: Dc Secondary Performance

    Inputs with a V*Hz product >2.2 E7 are unspecified. Typical specification, as determined by sourcing with the Fluke 5205A Precision Power Amplifier. Inputs that are >30 kHz and >750 V are typical, as determined by sourcing with the Fluke 5205A Precision Power Amplifier. DC Secondary Performance Temperature Coefficient 0 °C to 10 °C...

  • Page 29: Operating Characteristics

    0.1200 MHz to 1.0000 MHz 1.0000 MHz to 1.1999 MHz 1.200 MHz to 11.999 MHz (Wideband only except 1.200 MHz to 1.209 MHz) 30.00 MHz 30.00 MHz to 50.00 MHz (Wideband 5790B/5 & 5790B/AF only) Reading Rate <40 Hz ............2 seconds per reading 40 Hz ..............

  • Page 30: Aux Input Characteristics

    Operators Manual AUX Input Characteristics The AUX input can be used with the Fluke A40/A40A Series Current Shunts to make relative ac current measurements. The 5790A-7001 A40/A40A Current Shunt Adapter and Cable are required. For optimal current measurements using shunts, see the Operators Manual.
  • Page 31 Introduction and Specifications Absolute Wideband Specifications (5790B/3, 5790B/5, and 5790B/AF) 0 °C to 50 °C Flatness Flatness 1 year ± ± (% of Reading + μV) Voltage Temperature 3 °C ± (% of Frequency Range Resolution Range Coefficient ppm Reading / °C...
  • Page 32 VSWR ............. <1.05 typical 5790B/AF The 5790B/AF absolute specification is ±0.23 % of voltage reading (1 year, 23 °C ±3 °C, 95 % confidence level (k=2), normally distributed). Specification applies to 50 MHz, 223.61 mV, referenced to the end of the provided serialized 0.91 meter (3 ft) cable.

  • Page 33: Installation

    When the Product is unpacked, check for all the standard equipment listed in Table 2-1 and check the shipping order for additional items ordered. Report any shortage to the place of purchase or to the nearest Fluke Calibration Service Center. See How to Contact Fluke Calibration if necessary. If performance tests are required for your acceptance procedures, refer to the Product service manual for instructions.

  • Page 34: Environmental And Input Requirements

    5790B Operators Manual Line power cords available from Fluke are listed in Table 2-2 and illustrated in Figure 2-1. Table 2-1. Standard Equipment Item Model or Part Number AC Measurement Standard 5790B Mains Power Cord See Table 2-2 and Figure 2-1 Type "N"...

  • Page 35: Cooling Considerations

    Installation Cooling Considerations Cooling Considerations  Caution Damage caused by overheating can occur if the area around the air intake or exhaust exit is restricted, the intake air is too warm, or the air filter becomes clogged. A hidden but important feature of the Product is its internal cooling system. Baffles direct cooling air from the fans throughout the chassis to internally dissipate heat during operation.

  • Page 36: Mains Voltage Selection

    The Product comes with the appropriate line power plug for the country of purchase. If a different type is necessary, refer to Table 2-2 and Figure 2-1. They list and show the mains line power plug types available from Fluke Calibration. Table 2-2. Line Power Cord Types Available from Fluke...

  • Page 37: Connect To Mains Power

    Installation Connect to Mains Power Connect to Mains Power Warning To avoid shock hazard, connect the factory supplied three- conductor mains power cord to a properly grounded power outlet. Do not use a two-conductor adapter or extension cord, as it will break the protective ground connection. If a two-conductor mains power cord must be used, a protective grounding wire must be connected between the ground terminal and earth ground before you connect the mains power...
  • Page 38 5790B Operators Manual...

  • Page 39: Features

    Chapter 3 Features Introduction This chapter is a reference for the functions and locations of the front and rear panel features. It also provides descriptions of each feature. Read this information before you use the Product. Front-panel operation instructions for the Product are in Chapter 4.

  • Page 40: Front Panel Features

    Refer to Chapter 4 for details. A 50 Ω Type “N” connector for inputs in Wideband mode (10 Hz to 30 MHz WIDEBAND -Option 5790B/3 or 50 MHz - Option 5790B/5 or 5790B/AF, 7 V rms max).  50 Ω Type “N”...
  • Page 41 Selects the WIDEBAND 50 Ω Type "N" connector as the active input, but Wideband  only if a 5790B/3 or 5790B/5 Wideband Module option is installed. This key generates a beep if no Wideband Module is installed. INPUT 1 key: Selects the INPUT 1 Type "N" connector as the active input.

  • Page 42: Rear Panel Features

    5790B Operators Manual Rear Panel Features Rear-panel features (including all terminals, sockets, and connectors) are shown in Figure 3-2. Table 3-2 briefly explains each rear-panel feature. hvi007.eps Figure 3-2. Rear Panel...

  • Page 43: Rear Panel Features

    Features Rear Panel Features Table 3-2. Rear Panel Features Ref No. Name Function AC PWR INPUT  A grounded male three-prong connector for the mains power cord. Connector Master ON/OFF This switch must be in the ON (I) position before the soft power ...
  • Page 44 5790B Operators Manual...

  • Page 45: Front Panel Operation

    Chapter 4 Front Panel Operation Introduction This chapter explains front-panel operation. Controls, the display, and terminals are described in detail in Chapter 3. Remote interface setups are explained in Chapter 5. The first part of this chapter is general and applies to all modes of operation.

  • Page 46: Power-Up State

    5790B Operators Manual Power-Up State After passing power-up self tests and any time is pushed, the Product goes  into the power-up state. The only power-up setting that is non-volatile (saved when the power is turned off) is the Initial Input setting. When you turn on the...

  • Page 47: Calibrating Dc Zeros

    None Stall Protocol XON/ XOFF Serial Port Remote Interface Mode Terminal EOL Characters (RS-232) CRLF User Report String (*PUD in remote) 5790B Real Time Clock Date Not changed Real Time Clock Time Not changed Date Format M/D/Y Calibrating DC Zeros...

  • Page 48: Setup Menu

    5790B Operators Manual Setup Menu Setup Menu Softkey Push the Setup Menu softkey to call up the top-level utilities menu, which provides softkeys for calibration, diagnostics, instrument setup, system settings and measurement control. Most parameters are saved in memory until they are changed, including power-off periods.

  • Page 49: Checking Instrument Configuration

    Front Panel Operation Setup Menu • Self Tests & Diagnostics: Opens the self tests and diagnostics menu. This menu contains softkeys to execute the power-up tests/instrument diagnostics, and interactive tests for verifying the bell and keys. Push  at any time to abort the diagnostic tests.

  • Page 50: Setting The Internal Clock/Calendar

    5790B Operators Manual Setting the Internal Clock/Calendar An internal clock provides the date (corrected for leap years) and time to the Product CPU (Central Processing Unit). Check the clock setting and set it if necessary. Note A long-life battery keeps the clock running during power-off periods.

  • Page 51: Instrument Specification

    INPUT 2 binding posts. For the best measurement quality, use a coaxial cable and INPUT 1 for input frequencies >300 kHz (refer to Table 4-3). For more information, refer to the Fluke Calibration application note How Cables and Connectors Impact Measurement Uncertainty. Cable recommendations depend on the INPUT connector used and the input amplitude and frequency.

  • Page 52: Test Leads And Connectors

    (thermal emfs), use connectors and conductors made of copper or materials that generate small thermal emfs when joined to copper. Avoid using nickel-plated connectors. Use Fluke Model 5440A-7002 Low Thermal EMF Test Leads for optimal results. Table 4-3. Input Test Lead Summary...

  • Page 53: Connecting The Guard And Ground Binding Posts

    Front Panel Operation Connecting Sources to the Product Table 4-4. Input Impedance Summary Input Range Inputs 1 and 2 Wideband Input 1000 V 500 kΩ 700 V 500 kΩ 220 V 50 kΩ 70 V 50 kΩ 22 V 50 kΩ 50 Ω...

  • Page 54: Guard Theory

    5790B Operators Manual Guard Theory The GUARD is an electrical shield around the sensitive analog circuitry, insulated from chassis ground and the rest of the Product. The GUARD provides a low- impedance path for common-mode noise and ground currents. The guard reduces the chance of ground currents in the signal leads caused by powering interconnected instruments from ac outlets at different ground potentials.
  • Page 55 Front Panel Operation Connecting Sources to the Product 5790B EXT GRD Plane of reference UUT DMM EXT GRD Guard Guard Use Heavy Braid Source int GRD 12/21/12 10:52am +/- 0.00050mV (1 year) 213 days since calibration Standby Auto Range 220 mV 0.00000...

  • Page 56: External Guard Connection

    5790B Operators Manual Plane of reference Guard 5790B EXT GRD Use heavy braid UUT Source Input 12/21/12 10:52am +/- 0.00050mV (1 year) 213 days since calibration Standby Auto Range 220 mV 0.00000 External External Wideband Setup Sense Guard Menu hvi031eps Figure 4-2.

  • Page 57: Basic Operation

    Front Panel Operation Basic Operation Basic Operation Whether your application involves measurement mode or transfer mode, you can select certain measurement parameters. Among them is the Digital Filter Mode and Restart threshold, accessible through the Setup Menu>Instrument Setup menu. This and other measurement parameters are described in this section. Interpreting the Display The display shows the measured input voltage and frequency.

  • Page 58: Digital Filter Mode

    5790B Operators Manual Measurements should not be considered valid while there are dashes (--) in the measurement value, as shown below. These dashes indicate that the measurement is unsettled. 2/06/15 10:52am +/- 3% (1 year) 83 days since calibration Input 2 Auto Range 2.2 V...
  • Page 59 Front Panel Operation Basic Operation Note The extra digit of resolution obtained in the SLOW and MEDIUM Digital Filter Mode settings does not apply to the number of counts selected by the Restart softkey. For example, suppose the instrument is in the 22V range and the digital filter settings are Mode = SLOW and Restart = FINE.

  • Page 60: Hi Res Mode

    5790B Operators Manual Hi Res Mode The "Hi Res" mode increases the Measurement Display resolution by one digit in several of the ranges. The same is true for setting the Digital Filter to SLOW or MEDIUM (see Digital Filter). Table 4-5 shows the resolution for each range, depending on the “Hi Res” and Digital Filter settings.

  • Page 61: Statistics

    Front Panel Operation Basic Operation Statistics Located on the Main Menu, use the Statistics feature to sample the input signal being measured and to calculate standard deviation of the signal in ppm and V for various sample sizes. To access the statistics menu, push the Statistics softkey.

  • Page 62: Current Shunt Function

    5790B Operators Manual Current Shunt Function Located in the Main Menu, the Product can be used with a current shunt to determine the current-sourcing ability of a UUT by measuring the voltage output of a current shunt as shown below. Refer to Instructions for Current Measurements for information and instructions on how to use this function.

  • Page 63: Selecting Auto Or Locked Range

    5205A or 5215A. This prevents a cyclic auto-range condition between the 5790B and the 5205A or 5215A instruments. When a 5205A is used as the boost amplifier for the 5700A, a slew rate trip condition is avoided because the 5700A forces a controlled ramp to the final voltage.

  • Page 64: Selecting Continuous Or External (Single) Trigger

    5790B Operators Manual Selecting Continuous or External (Single) Trigger When the Product is in continuous trigger mode, the Product is continuously taking measurements. This is the initial setting at each power-up. As soon as one measurement is completed, the Product begins a new measurement at the active input.

  • Page 65: Transfer Mode

    Front Panel Operation Instructions for Voltage Measurements +/- 22.0 ppm (1 year) 83 days since calibration 2/06/15 10:52am Filter 16/16 Input 2 Auto Range 2.2 V 1.7035818 1.0030 Select Reference Setup Current Statistics Peak-to-Peak Menu Menu Shunt hvi004.eps To determine the error of an ac source, check the specifications for proper test uncertainty ratios and measure the source.
  • Page 66 5790B Operators Manual To eliminate dc reversal errors, average the reference against its equal and opposite value: 1. Apply -2 V dc to INPUT 2. 2. Select the Average Reference softkey. The Product now uses the average of the absolute values of the +2 V and - 2 V readings as the reference. This eliminates any dc offsets.
  • Page 67 One example of a Transfer mode application is determining the error of an ac source referenced to an external dc standard such as a Fluke 5730A Calibrator. In transfer mode, an external source can be used to establish a reference, and the uncertainty of the measurement is governed by Product ac-dc difference specifications in addition to the uncertainty of the dc source.

  • Page 68: Establish A Reference

    5790B Operators Manual Establish a Reference To establish a reference, apply an external dc reference to INPUT 1 or INPUT 2. For highest resolution and most stable measurement, set the Digital Filter to SLOW. (Setup Menu>Instrument Setup.) Under Digital Filter Setup select Mode>Slow (32).

  • Page 69: Instructions For Current Measurements

    The Product makes accurate absolute and relative current measurements when used in conjunction with a current shunt. Fluke offers three current shunts that can be used with the Product: the A40B, A40A, and A40. The Fluke A40B makes direct, absolute current measurements and offers optimal performance and convenience.

  • Page 70: Connect An A40B

    5790B Operators Manual Connect an A40B Use the Fluke A40B Current Shunts only with INPUT 1 via an N-type coaxial cable or INPUT 2 via standard terminal plugs. Fluke Calibration offers two cables with different terminations to accommodate the various application needs.

  • Page 71: Set Up A Fluke A40B Shunt

    Measure with a Fluke A40B Shunt To make a current measurement with the Fluke A40B: 1. Set up the A40B shunt as instructed in Setting Up a Fluke A40B Shunt. 2. Connect the shunt to the INPUT 1 Type "N" connector or INPUT 2 binding posts.

  • Page 72: Current Measurements With An A40, A40A, Or Custom Current Shunt

    The Fluke A40/A40A allows for relative ac/dc current transfer measurements from 2.5 mA to 20 A with a frequency range of 10 Hz to 100 kHz. All connections are made to INPUT 1 or the AUX Input using the special Fluke adapters noted in the subsequent sections.

  • Page 73: Connect An A40/A40A To The Aux Input

    Figure 4-5. Measuring Relative Current Using 5790A-7001 Use the 5790B-7001 accessory to connect the Fluke A40 or A40A Current Shunts to the Product AUX input to make current transfers up to 20 A (see Figure 4-4). The Product AUX Input is internally terminated with a 90 Ω resistor that allows for direct connection to current shunts.

  • Page 74: Set Up A Fluke A40/A40A Or Custom Current Shunt

    5790B Operators Manual Set up a Fluke A40/A40A or Custom Current Shunt To set up an A40/A40A or Custom current shunt: 1. Select Setup Menu >Instrument Setup >Current Shunt Details. 2. Navigate to page 2 of the menu and select A40/A40A/Custom Shunt.

  • Page 75: Measure With A Fluke A40, A40A Or Custom Shunt

    5730A Wideband output. The 5790B Wideband option measures signals from 600 µV to 7 V over a frequency range of 10 Hz to 30 MHz (Option 5790B/3) or 50 MHz (Option 5790B/5 and 5790B/AF). The input impedance is 50 Ω on all ranges.

  • Page 76: Techniques For Reducing Transfer Errors

    5. For normal wideband operation, vary the source from 10 Hz to 30 MHz (Option 5790B/3) or 50 MHz (Option 5790B/5) while recording the amplitude error relative to the stored 1 kHz reference. The error can be shown in ppm, percent, voltage, or ratio as the input frequency is swept through its range.

  • Page 77: Loading

    Front Panel Operation Techniques for Reducing Transfer Errors Loading The Product input impedance may affect ac voltage source output levels. See Table 4-4 for the input impedance on each range. Sources with resistive dividers on the output are especially sensitive to loading errors. Cables present an additional capacitive load to the source.

  • Page 78: Emi

    5790B Operators Manual The Product inputs, especially the WIDEBAND input, are broadband inputs. This means you should avoid applying RF signals that can be inadvertently picked up by cables. To minimize cable pickup, use short coaxial leads when possible, especially at test voltages below 2 V.

  • Page 79: Remote Operation

    Ethernet, and USB 2.0. Only use one interface at a time. The interface is selected in the Remote Setup menu as described below. Note You can use 5790A remote programs to operate the 5790B. Warning To avoid electrical shock, program the Product with caution.

  • Page 80: Ieee-488 Bus Restrictions

    To set up the bus: 1. With the Product off, attach the IEEE-488 cable to the rear panel IEEE-488 connector. Fluke Calibration recommends shielded cables Y8021 (1m), Y8022 (2m), or Y8023 (4m) from Fluke. 2. Push  to turn on the Product.

  • Page 81: Ieee-488 Interface Configuration

    Remote Operation Using the IEEE-488 Interface for Remote Control IEEE-488 Interface Configuration The Product IEEE-488 interface supports the IEEE-488 interface function subsets listed in Table 5-1. Table 5-1. Supported IEEE-488 Interface Function Subsets Interface Function Description Complete source handshake capability Complete acceptor handshake capability Basic talker;...

  • Page 82: Rs-232 Serial Interface

    9-pin subminiature D connectors to connect the Product to other DTE (Data Terminal Equipment) such as a typical computer serial interface. The recommended shielded cable is a Fluke RS43. Table 5-2 shows the choices available and the defaults for all programmable interface parameters for the Product.

  • Page 83: Set Up And Connect The Serial Interface

    1. With the Product power off, connect a shielded 9-pin D subminiature RS-232 null-modem cable such as Fluke accessory RS43 to the rear panel RS-232 connector and to the peripheral device. Always use a completely shielded cable.

  • Page 84: Serial Remote Control Setup Procedure

    5790B Operators Manual 4. Touch the parameter you want to change. See Table 5-2. 5. Touch EOL to set the EOL (End Of Line) character to CR, LF, or the string CR LF. 6. To set up the interface for remote control of the Product, touch Remote IF and make a selection (Terminal or Computer).

  • Page 85: Ethernet Interface

    Computers will often interpret zeros in the IP address as OCTAL values. As an example, if the IP address is configured from the front panel as 129.196.017.023 and then a connection to the 5790B is attempted, a connection will be made to the IP address 129.196.17.23. Attempts to establish a connection to 129.196.017.023 from a computer or other device may result in a connection...

  • Page 86: Set The Ip Address

    IP network. DHCP is the easiest way to configure the 5790B for remote communication through the LAN interface. DHCP is enabled by default when the 5790B is shipped from the factory. When you connect the Product to a network with the LAN port enabled, the Product retrieves the parameters from a DHCP server necessary for communications.

  • Page 87: Configure The General Network Socket Port

    Remote Operation Ethernet Interface Configure the General Network Socket Port To communicate with each other, a client computer and the Product must use the same socket port number. The default port is 3490. Typically, the default port does not need to be changed. If the socket port must be changed, enter the Socket Port number supplied by the network administrator.

  • Page 88: Set The Lan Subnet Mask

    5790B Operators Manual Set the LAN Subnet Mask If communication between the client computer and the Product passes through a router or gateway, and DHCP is disabled, it is necessary to set the subnet mask and default gateway address on both the client computer and the Product. Get the correct subnet mask and gateway address from the network administrator.

  • Page 89: Terminate An Ethernet Connection

    Typically, terminating the shell (or command window in DOS) will terminate the Telnet session. When the client terminates the Telnet session, the LAN server in the 5790B goes back into listen mode waiting for a new client to make a LAN connection request.
  • Page 90 5790B Operators Manual 5-12...

  • Page 91: Remote Commands

    Chapter 6 Remote Commands Introduction The following syntax rules apply to all the remote commands. A command consists of a word (by itself or a word followed by one or more parameters). The rules for parameter syntax are provided first, including proper usage of units and multipliers, followed by the rules for extra spaces, followed by the rules for terminator usage.

  • Page 92: Extra Space Or Tab Characters

    5790B Operators Manual Table 6-1. Units Accepted in Parameters and Used in Responses Units Meaning Hertz Kilohertz Megahertz Microvolts Millivolts Volts Kilovolts Amps Decibels Percent Parts-per-million RATIO (Unitless) Extra Space or Tab Characters The remote program examples are at the end of this chapter. Commands and their parameters are shown separated by spaces.

  • Page 93: Incoming Character Processing

    Remote Commands Input Buffer Operation Incoming Character Processing The Product processes all incoming data (except Binary Block Data as described under the *PUD commands.): • The most significant data bit (DIO8) is ignored. • All data is taken as 7-bit ASCII. •...

  • Page 94: Response Data Types

    5790B Operators Manual Table 6-2. Response Data Types Data Type Description Integers for some controllers or computers are decimal numbers in the range from -32768 to 32767. Responses in this range are labeled Integer. Integer Example: CMD: *ESE 123; *ESE?

  • Page 95: Using Commands

    Remote Commands Using Commands Using Commands Communication between the controller and the Product consists of interface messages and commands. Interface messages are defined by the IEEE-488.1 standard and control the lowest level of bus communication. Interface messages are handled automatically by the controller. (See "Interface Messages" further on in this chapter for more information.) The commands are described in this chapter.

  • Page 96: Calibration Security Passcode

    The passcode can also be changed over the remote interface with the CAL_PASSWD command. Like the 5790A, the 5790B also has some calibration commands that require you to set the calibration secure state to “SERVICE” cal mode. This requires a separate passcode that is only available by contacting Fluke Customer Support.

  • Page 97: Definition: Queries And Commands

    Remote Commands Using Commands Definition: Queries and Commands Messages directed to the Product are commands and queries. Commands instruct the Product to do something or to set a value, and no response is expected. Queries generally ask only for information from the Product and a response is always expected.

  • Page 98: Functional Elements Of Commands

    5790B Operators Manual Table 6-3. Functional Elements of Commands Element Function A sequence of zero or more PROGRAM MESSAGE UNIT PROGRAM MESSAGE elements separated by PROGRAM MESSAGE UNIT SEPARATOR elements. A single command, programming data, or query received by PROGRAM MESSAGE UNIT the device.

  • Page 99: Interface Messages (Ieee-488 Only)

    Remote Commands Using Commands Interface Messages (IEEE-488 Only) Interface messages manage traffic on the bus. Device addressing and clearing, data handshaking, and commands to place status bytes on the bus are all directed by interface messages. Some of the interface messages occur as state transitions of dedicated control lines.

  • Page 100: Use Of *Opc?, *Opc, And *Wai

    5790B Operators Manual Table 6-5. Interface Messages Sent by the Product Mnemonic Name Function A message that appears when the Product asserts the EOI control line, which happens when the Product transmits the ASCII character LF for its termination sequence or terminator.

  • Page 101: Command Summary

    Remote Commands Use of *OPC?, *OPC, and *WAI Table 6-6. Command Summary IEEE-488.2 Common Commands Clears status. Clears the ESR, the ISCR, and the error queue. Terminates a *CLS ending operation complete command (*OPC). *ESE Sets event status enable register, described in Status Information section below. Returns the decimal equivalent of the event status enable register, described in *ESE? Status Information section below.
  • Page 102 5790B Operators Manual Table 6-6. Command Summary (cont.) Instrument Configuration Commands ADDR Sets the GPIB address. ADDR? Returns the GPIB address. BRIGHTNESS Sets the brightness of the GUI display. BRIGHTNESS? Returns the brightness setting. AMPS? Returns the corrected current shunt equivalent given the selected shunt.
  • Page 103 Remote Commands Use of *OPC?, *OPC, and *WAI Table 6-6. Command Summary (cont.) Instrument Configuration Commands Restores calibration constants and setups to factory defaults. Use with extreme FORMAT care. GWADDR Sets gateway address GWADDR? Returns the gateway address. IPADDR Sets IP address IPADDR? Returns the IP address MACADDR?
  • Page 104 5790B Operators Manual Table 6-6. Command Summary (cont.) Instrument Configuration Commands SH_SERNUM Sets the serial number of loaded shunt. SH_SERNUM? Returns the serial number of the selected shunt. SH_TYPE? Returns the type of the selected shunt. SP_SET Programs serial port nonvolatile settings.
  • Page 105 Remote Commands Use of *OPC?, *OPC, and *WAI Table 6-6. Command Summary (cont.) Measurement and Transfer Commands REFCLR Clears the reference. REFSET Sets the reference to the value of the present input measurement. STATS Turns measurement statistics ON or OFF. STATS_PAUSE Pauses statistics collection underway.
  • Page 106 Returns a string that describes what a calibration or diagnostic procedure is doing. ONTIME? Returns the time in minutes since the power was turned on. 5790B Calibration, Testing, and Diagnostics Commands ABORT Aborts a measurement, calibration, or diagnostic procedure. CAL_AC Begins an interactive ac calibration procedure for an ac range.
  • Page 107 Remote Commands Use of *OPC?, *OPC, and *WAI Table 6-6. Command Summary (cont.) 5790B Calibration, Testing, and Diagnostics Commands CAL_INTV? Returns the calibration interval. CAL_NEXT Initiates the next calibration point. Returns the value of the next point to be calibrated when in the middle of CAL_NEXT? calibrating a range.

  • Page 108: Alphabetical List Of Ieee-488.2 Common Commands

    5790B Operators Manual Table 6-6. Command Summary (cont.) 5790B Calibration, Testing, and Diagnostics Commands DIAG Runs a self-diagnostic routine. Sets the Product response to errors that occur during execution of diagnostics DIAGFLT under remote control. (Nonvolatile.) Returns the setting of the response to errors that occur during diagnostics DIAGFLT? executed under remote control.
  • Page 109 None Response (IAD) A message containing five fields separated by commas, as follows: 1. Manufacturer (FLUKE) 2. Model number (5790B) 3. Serial number 4. Firmware revision level for the Main CPU and Guard Crossing CPU Example FLUKE,5790B,7649820, v1.08+v1.01 FPGAv4 6-19...
  • Page 110 5790B Operators Manual *LRN? Learns the current setting of the Product . The response to this command is a string that when sent back to the Product at a later time recreates the operational state. This response uses the *LRN command which is reserved for this purpose and is not documented beyond here.
  • Page 111 Remote Commands Alphabetical List of IEEE-488.2 Common Commands *OPT? Query which hardware options are installed. Parameter None Response No wideband installed WBND 30 MHz option installed WBEX 50 MHz option installed WBAF 50 MHz/AF option installed *PUD (Protected user data command.) This command allows you to store a string of bytes in nonvolatile memory.
  • Page 112 5790B Operators Manual *RCL Restores the Product operating state to a previous setup saved using the *SAV command. This command together with *SAV gives you up to 16 operating state memories. The following operating parameters are saved by this command: •...
  • Page 113 Remote Commands Alphabetical List of IEEE-488.2 Common Commands *SRE? Returns the byte from the Service Request Enable register, described under "Checking Product Status." Parameter None Response (Integer) The contents of the Instrument Status Register in decimal. *STB? Returns the status byte. The status byte is described under "Status Information." Parameter None Response...

  • Page 114: Alphabetical List Of 5790B Device-Dependent Commands

    TRIG with a *WAI command. This is useful because TRIG is an overlapped command, which means the Product would normally go on to process other commands before completing the TRIG command. Alphabetical List of 5790B Device-Dependent Commands ABORT Aborts a measurement, calibration or diagnostic procedure, or calibration step in progress.
  • Page 115 Remote Commands Alphabetical List of 5790B Device-Dependent Commands AMPS? Return corrected current shunt equivalent given the selected shunt. Parameter None Response 1. (real) Amplitude 2. (String) Units Example AMPS? 1.1648312E+01,A AMPS_DELTA? Returns the shunt-corrected difference/ratio between the measurement and the...
  • Page 116 Parameters 1. INPUT1 or INPUT2 (The input to be used, signifies normal ac calibration), or WBND for Option 5790B/3 or Option 5790B/5 Wideband flatness calibration. 2. (Optional) A number that defines the range amplitude (same as for the RANGE command).
  • Page 117 Parameters 1. INPUT1 or INPUT2 (The input to be used, signifies ac calibration), or WBND for Option 5790B/3 or Option 5790B/5 Wideband calibration 2. (Optional) A number that defines the range amplitude (same as for the RANGE command). If this parameter is included, list only the steps for the specified range;...
  • Page 118 5790B Operators Manual CAL_CLST? Lists the symbolic names and values for a group of calibration constants. Parameters 1. Which constants to list. This parameter may be a single constant (for example, DI_7V) or a group of constants (for example, AC_7V), or a group of groups (for example, AC, or ALL).
  • Page 119 Remote Commands Alphabetical List of 5790B Device-Dependent Commands CAL_DATE This sets the verification date to the date returned by the internal clock/calendar; the calibration mode must be unsecured. Parameter None CAL_DATE? Returns the date of the most recent verification or calibration.
  • Page 120 Parameters 1. INPUT1 or INPUT2 (The input to be used; signifies dc calibration), or WBND for Option 5790B/3 or Option 5790B/5 Wideband gains calibration 2. (Optional) A number that defines the range amplitude (same as for the RANGE command). If this parameter is included, do only the specified range;...
  • Page 121 Parameters 1. INPUT1 or INPUT2 (The input to be used, signifies dc calibration), or WBND for Option 5790B/3 or Option 5790B/5 Wideband gains calibration. 2. (Optional) A number that defines the range amplitude (same as for the RANGE command). If this parameter is included, list only the steps for the specified range;...
  • Page 122 5790B Operators Manual CAL_FREQ Executes the frequency calibration procedure. An error is generated if the frequency or amplitude measurement is out of range. If an error occurs, the frequency calibration procedure is not executed. This step is part of service calibration.
  • Page 123 Remote Commands Alphabetical List of 5790B Device-Dependent Commands CAL_INTV? Returns the calibration interval. Parameter None Response (Integer) The number of days in the calibration interval (90, 365, 730). CAL_MODE? Returns the setting of the CALIBRATION MODE state. (CAL_SW? returns the calibration security state (secure or unsecure).
  • Page 124 5790B Operators Manual CAL_NEXT? Returns the value of the next point to be calibrated when in the process of calibrating a range. Otherwise, this returns 0.0,-1.0. Parameter None Response 1. (Float) The nominal amplitude of the expected value for the next calibration point.
  • Page 125 Remote Commands Alphabetical List of 5790B Device-Dependent Commands CAL_RPT? Returns a listing of a calibration report. Parameters • ACTIVE (The shifts resulting from the last calibration) • STORED (The shifts resulting from the last stored calibration) • CONSTS (A list of all calibration constants) Response (IAD) The report followed by the EOFSTR.
  • Page 126 5790B Operators Manual CAL_SECURE? Sequential command. Returns the current security state of Calibration. Parameter None Response String Example CAL_SECURE? Returns ON if the Calibration state is secured. CAL_SHIFT? Calculates and returns the difference (shift) in the results of updated calibration constants at a specific input, range, and frequency.
  • Page 127 Remote Commands Alphabetical List of 5790B Device-Dependent Commands CAL_SPEC? Calculates and returns the absolute uncertainty specification for a specific input, value (and range), and frequency. This is similar to UNCERT?, except CAL_SPEC uses the parameters you send rather than the most recent input.
  • Page 128 5790B Operators Manual CAL_STORE? Tells how many calibration constant groups have been updated but not saved. (This is like CAL_STLST? except only the initial number is given.) Parameters • DC (DC calibration) • AC (AC calibration) • ZC (DC zeros calibration) •...
  • Page 129 Remote Commands Alphabetical List of 5790B Device-Dependent Commands CAL_USB Overlapped command. Saves a calibration report to a USB thumb drive connected to the front panel USB host port. This command may take 1-2 minutes to execute. Parameter ACTIVE (The shifts resulting from the last calibration)
  • Page 130 5790B Operators Manual CAL_ZERO Executes dc zeros calibration. An error is generated if the Product cannot make a measurement (ie, if the short is not applied to the input as specified in the normal operation section of this SRS). (Overlapped command.)
  • Page 131 Remote Commands Alphabetical List of 5790B Device-Dependent Commands CMDSTR? Returns the command string (if possible) associated with the last error. Parameter None Response (String) The erroneous command string COMM Select the remote interface (SERIAL, GPIB, ENET, USB). If you select another interface remotely, the change takes place immediately.
  • Page 132 5790B Operators Manual DELTA? Returns the delta (transfer) value from the Product. This is the difference between the reference value in memory and the present input. (Also see the DUNIT command.) Parameters None Responses: 1. (Float) the transfer value. The value is 0 if no reference has been set.
  • Page 133 Remote Commands Alphabetical List of 5790B Device-Dependent Commands DIAG Runs a self-diagnostics routine. If any errors are detected, they are logged into the error queue where they can be read by the ERR? query. The response to errors that occur during remote-controlled diagnostics depends on the setting of the DIAGFLT command.
  • Page 134 Partially emulates a 5790A over the remote interface. This changes the model number in the *IDN? response. “Partially” means the command execution speed cannot be guaranteed when comparing a 5790A to a 5790B. If there are hard coded delays in your remote commands, the delays may need to be altered if issues are experienced.
  • Page 135 Remote Commands Alphabetical List of 5790B Device-Dependent Commands Sequential command. Sets the end of line terminator for outgoing data for a specified remote port. Parameter 1. SERIAL, USB, ENET 2. CRLF, CR, LF Example EOL ENET, CR Sets the end of line terminator for Ethernet communication to CR.
  • Page 136 5790B Operators Manual ERR? Returns the first error code contained in the Product error queue, then removes that error code from the queue. Following the error code is an explanation of the error code, similar to but not always the same as the string you receive from the EXPLAIN? command.
  • Page 137 Remote Commands Alphabetical List of 5790B Device-Dependent Commands EXTRIG? Returns the internal or external trigger setting. Parameter None Response (Integer) 1 for external trigger, or 0 for internal trigger FAULT? Returns the first error code contained in the Product error queue, and then removes that error code from the queue.
  • Page 138 5790B Operators Manual GWADDR Sequential command. Sets the Ethernet gateway address for LAN communication when NOT in DHCP mode. Parameter Gateway address (quoted string consisting of 4 decimal values bound between 0-255 separated by periods). Example GWADDR "129.196.136.1" Sets the Etherent gateway address to 129.196.136.1 GWADDR? Sequential command.
  • Page 139 Remote Commands Alphabetical List of 5790B Device-Dependent Commands IDN? Return detailed instrument ID and software version information. Parameter None Example Make: FLUKE Model: 5790B Serial #: 8675309 MAC address: 00:80:40:ff:00:19 Main Version: v1.08 Timestamp: 2015-05-12 11:41:03 git Branch: master git ID: dd8f90596d6d8b6c70efc2a1111d72ddb0059552 Workspace: /evtfs/wg03/lancer/grponly/sw/Release/ogsrc GUI Library: Qt 4.8.5...
  • Page 140 5790B Operators Manual IPADDR ? Sequential command. Returns the IP address for LAN communication. When DHCP is enabled, this address will be the address allocated by the DNS server. When DHCP is disabled, this address will be the entered value of the static IP address.
  • Page 141 Remote Commands Alphabetical List of 5790B Device-Dependent Commands number with #b, #o, or #h, respectively. (A number without a preceding designator is taken as decimal.) Example ISCE1 52 Loads 00000000 00110100 (binary) into the register, enabling bits 5 (MCCHG), 4 (MDCHG), and 2 (RNGCHG).
  • Page 142 5790B Operators Manual ISR? Reads the contents of the Instrument Status Register described under "Checking Product Status." Parameter None Response (Integer) The contents of the Instrument Status Register in decimal. Example ISR? Returns 32 if bit 5 (MCCHG is set to 1) in the Instrument Status register.
  • Page 143 Remote Commands Alphabetical List of 5790B Device-Dependent Commands MEAS? Triggers (or in continuous trigger, retriggers) a new measurement, waits for it to complete, then returns the value of the present input measurement (the most recently completed input measurement). If a timeout argument is given and no...
  • Page 144 5790B Operators Manual Returns (50 Ω) milliwatt power equivalent of the reading. This is valid only for wideband. Parameter None Response 1. (real) Amplitude 2. (String) Units Example 1.2736105E+00,MW ONTIME? Returns the time in minutes that the Product power has been turned on for the current operating session.
  • Page 145 Remote Commands Alphabetical List of 5790B Device-Dependent Commands RANGE? Returns the present measurement range parameters. Response 1. (Float) The nominal maximum value for the range (uprange point in auto range). 2. (Float) Minimum value measurable by range (not including low end hysteresis for autoranging).
  • Page 146 5790B Operators Manual REM_MODE Sequential command. Sets the response type for a specified remote port. Parameter 1. SERIAL, USB, ENET 2. COMP,TERM Example REM_MODE SERIAL, COMP Sets the response type for serial communication to COMPUTER REM_MODE ENET, TERM Sets the response type for Ethernet communication to TERMINAL.
  • Page 147 Remote Commands Alphabetical List of 5790B Device-Dependent Commands SPLSTR Sets the serial/USB/Ethernet remote mode Serial Poll response string. Parameters The string (up to 40 characters) to print on receipt of a ^P (Control/P) character. Load or create a shunt. If a shunt of that serial number is already stored, it is loaded and the value is not checked.
  • Page 148 5790B Operators Manual SH_AC? Returns the AC/DC difference correction points for the currently selected shunt. Parameter None Response (comma separated list) 1. (Integer) Number of data points 2. (Real) Frequency calibration point 3. (Integer) Error in ppm Example SH_AC? 8,1.00e+01,0,5.50e+01,0,4.00e+02,0,1.00e+03,0,1.00e+04,0,3.00e+04,0,7.00e+04, 0,1.00e+05,0...
  • Page 149 Remote Commands Alphabetical List of 5790B Device-Dependent Commands SH_ACDEL Deletes an AC/DC difference correction of the currently selected shunt. Parameter 1. (Integer) Numeric index of the AC/DC difference correction (where zero represents the first element in the table) Example SH_ACDEL 3...
  • Page 150 5790B Operators Manual SH_CALDATE <i> Sets the calibration date for the currently selected shunt Parameter 1. (Integer) Cal date for selected shunt as YYYYMMDD. Example SH_CALDATE 20150223 SH_CALDATE? Returns the calibration date for the currently selected shunt Parameter None Example...
  • Page 151 Remote Commands Alphabetical List of 5790B Device-Dependent Commands SH_DELE Clears the shunt data for a particular serial number. The generic shunt for each class cannot be cleared (nor can serial number 0). Parameter 1. (Integer) Serial Number of shunt to delete...
  • Page 152 5790B Operators Manual SH_LISTALL? Lists all shunt serial numbers available. Parameter None Example SH_LISTALL? 456123,2A 4562,20MA 1345,20MA Shows three shunts, a 2 A shunt and two 20 MA shunts and their respective serial numbers. SH_LE? Returns the loading error correction points for the currently selected shunt.
  • Page 153 Remote Commands Alphabetical List of 5790B Device-Dependent Commands SH_LECLR Clears all of the loading error corrections for the currently selected shunt. Parameter None SH_LEDEL Deletes a loading error correction for the currently selected shunt. Parameter 1. (Integer) Numeric index of the loading error correction (where zero...
  • Page 154 5790B Operators Manual SH_LOAD Loads the data from a particular serial number shunt. Zero is not allowed. If the instrument is not in the current shunt measurement window, the window will be enabled on the successful execution of this command.
  • Page 155 Remote Commands Alphabetical List of 5790B Device-Dependent Commands SH_SERNUM? Returns the serial number of the currently selected shunt. Parameters None Example SH_SERNUM? 456123 Returns the serial number of the currently selected shunt. Use the SH_LISTALL? command to see all of the available shunt values and their serial numbers.
  • Page 156 5790B Operators Manual SP_SET Sets the serial port settings and saves them in nonvolatile memory. Parameters One or more of the following, in any order: 1. 9600, 19200, 38400, 57600, or 115200 (Baud rate) 2. TERM or COMP (See note below) 3.
  • Page 157 Remote Commands Alphabetical List of 5790B Device-Dependent Commands SP_SET? Returns the serial port settings contained in nonvolatile memory. Response 1. (Integer) One of these baud rate values: 9600, 19200, 38400, 57600 or 115200 2. (CRD) TERM or COMP (Response type) 3.
  • Page 158 5790B Operators Manual STATS_PAUSE Pauses statistics collection under way. If not collecting statistics, this command is ignored. Parameters None Example STATS_PAUSE STATS_RESUME Resumes statistics collection from a pause. If not paused, this command is ignored. Parameters None Example STATS_RESUME STATS_STOP Stops collecting statistics, but does not clear them.
  • Page 159 Remote Commands Alphabetical List of 5790B Device-Dependent Commands STATS? Returns the statistics. Parameters None Response (comma separated list) 1. (String) Current state of stats measurement (OFF, RUN, DONE, or PAUSE) 2. (Integer) Number of samples taken 3. (Real) Minimum value measured 4.
  • Page 160 5790B Operators Manual SUBNETMASK Sequential command. Sets the Ethernet subnet mask for LAN communication when NOT in DHCP mode. Parameter Subnet mask (quoted string consisting of 4 decimal values bound between 0- 255 separated by periods). Example SUBNETMASK "255.255.254.0" Sets the Ethernet subnet mask to 255.255.254.0 SUBNETMASK? Sequential command.

  • Page 161: Local-To-Remote State Transitions

    Remote Commands Local-to-Remote State Transitions VAL? Returns the value of the most recently completed input measurement. Parameters None Response The same response as the MEAS? query. Local-to-Remote State Transitions The Product can be operated either locally from the front panel, or remotely with remote control commands.

  • Page 162: Checking Product Status

    5790B Operators Manual Table 6-7. Operating State Transitions Typical GPIB From Command Remote MAL + REN REMOTE Local Local/Lockout LLO + REN LOCKOUT GTL or LOCAL LOCAL Local CONTROL selection Remote Remote/Lockout LLO + REN LOCKOUT REMOTE or any Local/Lockout...

  • Page 163: Status Register Summary

    Remote Commands Checking Product Status Table 6-8. Status Register Summary Register Read Command Write Command Enable Register (STB) *STB? (or Status Byte SPL) for some None Register controllers Service Request Enable Register *SRE? *SRE None (SRE) Event Status *ESR? None Register (ESR) Event Status Enable Register...
  • Page 164 5790B Operators Manual Instrument Status 8 7 6 5 4 3 2 1 Change Enable Register & Reading Using ISCE0? & Write to Using ISCE0 & & & & & & & & & & & & & & Instrument Status...

  • Page 165: Status Byte Register (Stb)

    Remote Commands Checking Product Status Status Byte Register (STB) The most important and frequently used register is the Status Byte Register (STB), which the Product sends when it responds to a serial poll. This byte is cleared (set to 0) when the power is turned on. Its bits are defined as follows (bits 1 and 0 are always 0).

  • Page 166: Service Request Line (Srq)

    5790B Operators Manual Service Request Line (SRQ) Service Request (SRQ) is an IEEE-488.1 bus control line the Product asserts to notify the controller that it requires some type of service. Many instruments can be on the bus, but they all share a single SRQ line. To determine which instrument set SRQ, the Controller normally does a serial poll of each instrument.

  • Page 167: Bit Assignments For The Esr And Ese

    Remote Commands Checking Product Status Bit Assignments for the ESR and ESE See Table 6-10 for bit assignments for the ESR and ESE. Table 6-10. Bit Assignments for ESR and ESE Power on. This bit is set to 1 if line power has been turned off and on since the last time the ESR was read.

  • Page 168: Instrument Status Change Registers

    5790B Operators Manual Instrument Status Change Registers There are two registers dedicated to monitoring changes in the ISR. These are the ISCR0 (Instrument Status 1-0 Change Register) and the ISCR1 (Instrument Status 0-1 Change Register). Each status change register has an associated mask register.

  • Page 169: Read The Isr, Iscr, Or Isce

    Remote Commands Checking Product Status Read the ISR, ISCR, or ISCE To read the contents of the ISR, send the remote command, "ISR?." To read the contents of the ISCR0 or 1, send the remote command, "ISCR0?", or "ISCR1?". To read the contents of the ISCE0 or 1, send the remote command, "ISCE0?", or "ISCE1?".
  • Page 170 5790B Operators Manual 6-80...

  • Page 171: Operator Maintenance

    Chapter 7 Operator Maintenance Introduction This chapter explains how to perform the routine maintenance and calibration tasks required to keep a normally operating 5790B AC Measurement Standard in optimal operating condition. These tasks include: • Replacing the fuse • Cleaning the air filter •...

  • Page 172: Replacement Fuses

    5790B Operators Manual Table 7-1. Replacement Fuses Line Voltage Range Fuse Description Fluke Part Number 100 V – 120 V T 1.5 A 250 V(SB) 109231 220 V – 240 V (SB) T 1.5 A 250 V(SB) 109231 add58f.eps Figure 7-1. Accessing the Fuse...

  • Page 173: Clean The Air Filter

    Operator Maintenance Clean the Air Filter Clean the Air Filter  Caution Damage caused by overheating can occur if the area around the fan is restricted, the intake air is too warm, or the air filter becomes clogged. To prevent Product damage, make sure that the filter is completely dry before reinstallation.

  • Page 174: General Cleaning

    5790B Operators Manual hvi026.eps Figure 7-2. Accessing the Air Filter General Cleaning To keep the Product looking like new, clean the case, front panel keys, and display using a soft cloth slightly dampened with water or a non-abrasive mild cleaning solution that does not harm plastics.

  • Page 175: User-Replaceable Parts

    Operator Maintenance User-Replaceable Parts User-Replaceable Parts User-replaceable parts are listed in Table 7-2. For more information about these items contact a Fluke Calibration representative. See the Contact Fluke Calibration section of this manual. Table 7-2. User-Replaceable Parts Fluke Calibration Description...

  • Page 176: Calibration

    5790B Operators Manual Calibration When shipped, the Product is calibrated at the factory, traceable to the SI. To maintain traceability, calibrate the Product to traceable external standards using proper procedures, as often as required by your choice of calibration cycle: 90 day, 1 year, or 2 years.

  • Page 177: A Error Codes

    Appendix A Error Codes 0-Level Faults: Error handling No Error Error Queue Overflow Bad ERR Channel 100-Level Faults: Self-calibration Invalid Procedure Number No Such Step In Procedure No Cal/Diag Procedure Underway Cal/Diag not Halted No Cal Step To Which To Back Up No Such Position For Range Under Cal No Such Range For Cal Procedure DAC %s Calibration Failed...
  • Page 178 5790B Operators Manual Offset Constant Out Of Limits Low F AC Constant Out Of Limits %s Range Zero Out Of Limits %s Range Shunt Offset Out Of Limits Divide By 0 %s IA Update Old %s IA Is Way Off! Do A DC Cal...
  • Page 179 Appendices Error Codes A15 A/D: DAC %s A15 A/D: Chopper %s A10 Transfer: %s Range A10 Transfer: %s Protection Check A10 Transfer: Overload Check A10 Transfer: Sensor Input/Output Match A10 Transfer: %s Range Zero A10 Transfer: %s Input Path A10 Transfer: %s Frequency Measurement A6 Wideband: %s Range A6 Wideband: Overload Check A6 Wideband: %s Frequency Measurement...
  • Page 180 5790B Operators Manual Destination directory not specified in AuxInfo Destination filename not specified in AuxInfo Error extracting required file transfer data from AuxInfo Error retrieving parameter value from AuxInfo Error retrieving section name from AuxInfo Interim directory not specified in AuxInfo...
  • Page 181 Appendices Error Codes Kernel Read Command not specified in AuxInfo Kernel Write Command not specified in AuxInfo Kernel Device failed to close Kernel Device failed to return info about device status Kernel Device failed to open Kernel Device failed to return status (error not used) Unable to determine the size of the Kernel image file Invalid offset in Kernel image section Unable to extract command1 from AuxInfo for FrontPanel_Part3...
  • Page 182 5790B Operators Manual Bad control byte from inguard Multiple timeouts sending to inguard Inguard request reset loop Unexpected NSA from inguard Bad packet num in ACK from inguard Illegal inguard transmit task state Inguard indefinite ACKWAIT holdoff Packet too large for inguard...
  • Page 183 Appendices Error Codes 1201 Error setting GPIB Primary Address 1202 Error occurred reading characters from GPIB controller 1203 Error occurred sending characters to the GPIB controller 1204 GPIB DOS Error 1205 GPIB specified Interface Board is not Active Controller 1206 GPIB no present listening devices 1207 GPIB interface Board has not been addressed properly...
  • Page 184 5790B Operators Manual 1315 Invalid Device Trigger 1316 *DDT Recursion 1317 Macro Calls Too Deep 1318 Remote Serial Port Dead 1320 Command Applies To Wideband Only 1321 Command Does Not Apply Wideband 1337 Already Executing a Procedure 1338 Already Writing to NV Memory...
  • Page 185 Appendices Error Codes 1501 Could not set time and date 1502 Invalid date 1503 Invalid time 1600-Level Faults: Analog hardware control 1601 Floating point math error 1602 Bad Reply Size From Inguard 1603 False MSG Semaphore from Inguard 1604 Inguard CPU A/D Error 1605 Inguard CPU Timed Out On Main CPU 1606...
  • Page 186 5790B Operators Manual 1806 Can not get DHCP IP address 1807 Ethernet port 1 1808 Ethernet remote port 1809 Port value already in use 1810 Cannot change ethernet settings now 1900-Level Faults: System 1901 Can not modify file property 1902...
  • Page 187 Appendix B Calibration Constant Information The constants in these tables are arranged by group. Each group is stored as a block in nonvolatile memory. The value given for each constant in this list is the default assigned before the instrument is first calibrated. Defaults are reinstated if you perform a format of the EEPROM ALL or CAL areas.
  • Page 188 5790B Operators Manual Group FREQ Name Default Function FREQ_G Frequency counter "gain" (crystal error) Group DC_DAC Name Default Function DAC_G 3017.0 DAC gain Group WDC_SENSOR Name Default Function SENSOR_C1_WB 3.162277660e-03 (Autogenerated) SENSOR_C2_WB (Autogenerated) Group AC_LINEARITY Name Default Function LN_C Coefficient of V^VEX*F^FEX...
  • Page 189 Appendices Calibration Constant Information Group FACTORY Name Default Function WB_OHMS 50.0 True value of wideband input impedance SHUNT_G Correction for shunt measurements Freq (flatness) correction for SHUNT (vs SHUNT_A1 3.153719E-9 INPUT1), 1st order SHUNT_A2 3.072481E-14 Freq correction for SHUNT, 2nd 2nd order freq corr for INPUT2 (vs INPUT2_LO 150.0E-6...
  • Page 190 5790B Operators Manual Group PERMANENT Name Default Function SLO_LIM 38.5 Slow/fast bit threshold Multiplies suggested ref value for lowest AC_LFCAL frequency Frequency at which DI and IA are WBDC_FREQ 1000.0 calibrated for wideband Point below which we switch back to low HF_LIMLO 102.0E+3...
  • Page 191 Appendices Calibration Constant Information Group WBCABLE Name Default Function The one and only correction for the cable, WBCABLE_CORR at 50 MHz Group DC_2_2MV Name Default Function DI_2_2MV 5000.0 2_2MV range DAC volts per input volt OF_2_2MV 2_2MV range DC offset Group ZC_2_2MV Name Default...
  • Page 192 5790B Operators Manual Group ZC_7MV Name Default Function Z_7MV 7MV range zero SHO_7MV 7MV AUX input offset IA_7MV 0.00316228 7MV range A/D volts per input volt Group AC_7MV Name Default Function F1_7MV 7MV range flatness correction 1 (10 Hz) F2_7MV...
  • Page 193 Appendices Calibration Constant Information Group AC_22MV Name Default Function F1_22MV 22MV range flatness correction 1 (10 Hz) F2_22MV 22MV range flatness correction 2 (100 Hz) F3_22MV 22MV range flatness correction 3 (1 kHz) F4_22MV 22MV range flatness correction 4 (10 kHz) F5_22MV 22MV range flatness correction 5 (20 kHz) F6_22MV...
  • Page 194 5790B Operators Manual Group DC_220MV Name Default Function DI_220MV 50.0 220MV range DAC volts per input volt OF_220MV 220MV range DC offset Group ZC_220MV Name Default Function Z_220MV 220MV range zero SHO_220MV 220MV AUX input offset IA_220MV 220MV range A/D volts per input volt...
  • Page 195 Appendices Calibration Constant Information Group AC_700MV Name Default Function F1_700MV 700MV range flatness correction 1 (10 Hz) F2_700MV 700MV range flatness correction 2 (100 Hz) F3_700MV 700MV range flatness correction 3 (1 kHz) F4_700MV 700MV range flatness correction 4 (10 kHz) F5_700MV 700MV range flatness correction 5 (20 kHz) F6_700MV...
  • Page 196 5790B Operators Manual Group DC_7V Name Default Function DI_7V 7V range DAC volts per input volt OF_7V 7V range DC offset Group ZC_7V Name Default Function Z_7V 7V range zero SHO_7V 7V AUX input offset IA_7V 3.16228 7V range A/D volts per input volt...
  • Page 197 Appendices Calibration Constant Information Group DC_22V Name Default Function DI_22V 22V range DAC volts per input volt OF_22V 22V range DC offset Group ZC_22V Name Default Function Z_22V 22V range zero SHO_22V 22V AUX input offset IA_22V 10.0 22V range A/D volts per input volt Group AC_22V Name Default...
  • Page 198 5790B Operators Manual Group DC_70V Name Default Function DI_70V 70V range DAC volts per input volt OF_70V 70V range DC offset Group ZC_70V Name Default Function Z_70V 70V range zero SHO_70V 70V AUX input offset IA_70V 31.6228 70V range A/D volts per input volt...
  • Page 199 Appendices Calibration Constant Information Group AC_220V Name Default Function F1_220V 220V range flatness correction 1 (10 Hz) F2_220V 220V range flatness correction 2 (100 Hz) F3_220V 220V range flatness correction 3 (1 kHz) F4_220V 220V range flatness correction 4 (10 kHz) F5_220V 220V range flatness correction 5 (20 kHz) F6_220V...
  • Page 200 5790B Operators Manual Group DC_1000V Name Default Function DI_1000V 0.005 1000V range DAC volts per input volt OF_1000V 1000V range DC offset Group ZC_1000V Name Default Function Z_1000V 1000V range zero SHO_1000V 1000V AUX input offset IA_1000V 1000.0 1000V range A/D volts per input volt...
  • Page 201 Appendices Calibration Constant Information Group WAC_2_2MV Name Default Function F1_2_2MV_WB 2_2MV range, wideband input, flatness correction 1 (10 Hz) F2_2_2MV_WB 2_2MV range, wideband input, flatness correction 2 (50 Hz) F3_2_2MV_WB 2_2MV range, wideband input, flatness correction 3 (400 Hz) F4_2_2MV_WB 2_2MV range, wideband input, flatness correction 4 (1 kHz) F5_2_2MV_WB 2_2MV range, wideband input, flatness correction 5 (2 kHz)
  • Page 202 5790B Operators Manual Group WDC_7MV Name Default Function DI_7MV_WB 1000.0 7MV range, wideband input, DAC volts per input volt IA_7MV_WB 7MV range A/D volts per input volt Group WAC_7MV Name Default Function F1_7MV_WB 7MV range, wideband input, flatness correction 1 (10 Hz)
  • Page 203 Appendices Calibration Constant Information Group WDC_22MV Name Default Function DI_22MV_WB 500.0 22MV range, wideband input, DAC volts per input volt IA_22MV_WB 0.316228 22MV range A/D volts per input volt Group WAC_22MV Name Default Function F1_22MV_WB 22MV range, wideband input, flatness correction 1 (10 Hz) F2_22MV_WB 22MV range, wideband input, flatness correction 2 (50 Hz) F3_22MV_WB...
  • Page 204 5790B Operators Manual Group WAC_70MV Name Default Function F1_70MV_WB 70MV range, wideband input, flatness correction 1 (10 Hz) F2_70MV_WB 70MV range, wideband input, flatness correction 2 (50 Hz) F3_70MV_WB 70MV range, wideband input, flatness correction 3 (400 Hz) F4_70MV_WB 70MV range, wideband input, flatness correction 4 (1 kHz)
  • Page 205 Appendices Calibration Constant Information Group WDC_220MV Name Default Function DI_220MV_WB 31.6228 220MV range, wideband input, DAC volts per input volt IA_220MV_WB 3.16228 220MV range A/D volts per input volt Group WAC_220MV Name Default Function 220MV range, wideband input, flatness correction 1 F1_220MV_WB (10 Hz) 220MV range, wideband input, flatness correction 2...
  • Page 206 5790B Operators Manual Group WDC_700MV Name Default Function DI_700MV_WB 10.0 700MV range, wideband input, DAC volts per input volt IA_700MV_WB 10.0 700MV range A/D volts per input volt Group WAC_700MV Name Default Function 700MV range, wideband input, flatness correction 1...
  • Page 207 Appendices Calibration Constant Information Group WDC_2_2V Name Default Function DI_2_2V_WB 3.16228 2_2V range, wideband input, DAC volts per input volt IA_2_2V_WB 31.6228 2_2V range A/D volts per input volt Group WAC_2_2V Name Default Function F1_2_2V_WB 2_2V range, wideband input, flatness correction 1 (10 Hz) F2_2_2V_WB 2_2V range, wideband input, flatness correction 2 (50 Hz) 2_2V range, wideband input, flatness correction 3 (400...
  • Page 208 5790B Operators Manual Group WAC_7V Name Default Function F1_7V_WB 7V range, wideband input, flatness correction 1 (10 Hz) F2_7V_WB 7V range, wideband input, flatness correction 2 (50 Hz) F3_7V_WB 7V range, wideband input, flatness correction 3 (400 Hz) F4_7V_WB 7V range, wideband input, flatness correction 4 (1 kHz)

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