Fluke 5790B/3 Operator's Manual
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Fluke 5790B/3 Operator's Manual

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5790A
AC Measurement Standard
Operators Manual
PN 893284
January 1992 Rev.4, 8/12
© 1992-2012 Fluke Corporation. All rights reserved. Printed in USA
All product names are trademarks of their respective companies.

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  • Page 1 5790A AC Measurement Standard Operators Manual PN 893284 January 1992 Rev.4, 8/12 © 1992-2012 Fluke Corporation. All rights reserved. Printed in USA 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 Declaration of the Manufacturer or Importer We hereby certify that the Fluke Model 5790A is in compliance with BMPT Vfg 243/1991 and is RFI suppressed. The marketing and sale of the equipment was reported to the Central Office for Telecommunication Permits (ZZF). The right to retest this equipment or verify compliance with the regulation was given to the ZZF.
  • Page 5 SAFETY TERMS IN THIS MANUAL This instrument has been designed and tested in accordance with IEC publication 1010-1 (1992-1), Safety Requirements for Electrical Measuring, Control and Laboratory Equipment, and ANSI/ISA-S82.01-1994, and CAN/CSA-C22.2 No. 1010.1-92. This User Manual contains information, warning, and cautions that must be followed to ensure safe operation and to maintain the instrument in a safe condition.
  • Page 6 USE THE PROPER POWER CORD Use only the power cord and connector appropriate for the voltage and plug configuration in your country. Use only a power cord that is in good condition. Refer power cord and connector changes to qualified service personnel. DO NOT OPERATE IN EXPLOSIVE ATMOSPHERES To avoid explosion, do not operate the instrument in an atmosphere of explosive gas.

  • Page 7: Table Of Contents

    Table of Contents Chapter Title Page Introduction and Specifications ............1-1 1-1. Introduction ................... 1-3 1-2. Inside the 5790A ................1-3 1-3. Measurement and Transfer Modes ........... 1-3 1-4. An Overview of the Features ............1-4 1-5. Instruction Manuals ................1-5 1-6.
  • Page 8 5790A Operators Manual 4-4. Warmup Requirements ..............4-4 4-5. Calibrating DC Zeros ............... 4-5 4-6. Connecting Sources to the 5790A ............4-6 4-7. Test Leads and Connectors ............... 4-6 4-8. Coaxial Inputs ................4-6 4-9. Dual Banana Inputs ..............4-6 4-10.
  • Page 9 (continued) Contents 5-15. Extra Space or Tab Characters ............5-9 5-16. Terminators..................5-9 5-17. Incoming Character Processing ............5-10 5-18. Response Message Syntax ..............5-10 5-19. Input Buffer Operation ................5-10 5-20. Using Commands .................. 5-12 5-21. Multiple Commands ................. 5-13 5-22.
  • Page 10 Accessories ................... 9-3 9-4. Fluke A40 and A40A Current Shunt Adapter (5790A-7001) ..9-3 9-5. Fluke A40A Current Shunt Adapter for Input 1 (792A-7004) ..9-3 9-6. Low Thermal EMF Test Leads (5440A-7002) ......... 9-4 9-7. Rack Mount Kit (Y5737)..............9-4 9-8.
  • Page 11 Table Title Page 2-1. Standard Equipment ....................2-3 2-2. Line Power Cord Types Available from Fluke ............2-3 3-1. Front Panel Features ....................3-4 4-1. Power-Up State Defaults and Volatility ..............4-4 4-2. Nonvolatile Setup Parameter Factory Defaults ............4-5 4-3.
  • Page 12 5790A Operators Manual...
  • Page 13 List of Figures Figure Title Page 1-1. Dimensions ......................1-7 2-1. Line Power Cord Types Available from Fluke ............2-4 2-2. Accessing the Fuse ....................2-5 2-3. Line Power Label and Switch Location ..............2-7 3-1. Accessing the Fuse ....................3-3 4-1.
  • Page 14 5790A Operators Manual viii...

  • Page 15: Title

    Chapter 1 Introduction and Specifications Title Page 1-1. Introduction ................... 1-3 1-2. Inside the 5790A ................1-3 1-3. Measurement and Transfer Modes ........... 1-3 1-4. An Overview of the Features ............1-4 1-5. Instruction Manuals ................1-5 1-6. 5790A Operators Manual ..............1-5 1-7.
  • Page 16 5790A Operators Manual...

  • Page 17: Introduction

    This is a pulse-width modulated dac with linearity typically better than 0.2 ppm of full scale. On the ac side, the Fluke rms sensor is similar in principle to a thermal voltage converter (thermocouple), but has faster settling time, low dc reversal error, higher signal-to-noise ratio, and excellent frequency performance.

  • Page 18: An Overview Of The Features

    5790A Operators Manual 3. Applies correction factors saved at time of calibration. 4. Presents the results of the ac-dc transfer on the Measurement Display, showing rms amplitude and frequency of the signal being applied, accurate to within the uncertainty of the internal dc standard combined with the transfer uncertainty. (See the Specifications.) Pressing a softkey (a key whose function is defined on the Control Display) sets an incoming signal as a reference, activating transfer mode.

  • Page 19: Instruction Manuals

    Introduction and Specifications Instruction Manuals 1-5. Instruction Manuals This Operators Manual contains operating instructions for the 5790A. The 5790A Manual Set provides complete information for the Operators and service or maintenance personnel. The set includes the following manuals: • 5790A Operators Manual, pn 893284 •...

  • Page 20: Current Shunt Adapters

    Accessory 5790A-7001 allows you to connect Fluke A40 or A40A Current Shunts the 5790A SHUNT input for making current transfers up to 20 A. Accessory 792A-7004 allows you to connect Fluke A40 Current Shunts to the INPUT 1 Type "N" connector for making current transfers up to 5 A.
  • Page 21 Introduction and Specifications Specifications Absolute Uncertainty Specifications ± 5 °C of Calibration Temperature Absolute Uncertainty Measurement Mode AC/DC Transfer Voltage Range Frequency Range ± (ppm of Reading + μV) Mode ± ppm 2 Years 90 Days 1 Year 2 Years 10 Hz - 20 Hz 1700 + 1.3 1700 + 1.3...
  • Page 22 5790A Operators Manual Absolute Uncertainty Specifications (cont.) ± 5 °C of Calibration Temperature Absolute Uncertainty Voltage AC/DC Transfer Measurement Mode Frequency Range ± (ppm of Reading) Range Mode ± ppm 2 Years 90 Days 1 Year 2 Years 10 Hz - 20 Hz 20 Hz - 40 Hz 40 Hz - 20 kHz 20 kHz - 50 kHz...
  • Page 23 Introduction and Specifications Specifications Relative Uncertainty Specifications ± 5 °C of Calibration Temperature Relative Uncertainty Measurement Mode AC/DC Transfer Voltage Range Frequency Range ± (ppm of Reading + μV) Mode ± ppm 2 Years 90 Days 1 Year 2 Years 10 Hz - 20 Hz 100 + 1.3 110 + 1.3...
  • Page 24 5790A Operators Manual Relative Uncertainty Specifications ± 5 °C of Calibration Temperature (cont) Relative Uncertainty Measurement Mode AC/DC Transfer Voltage Range Frequency Range ± (ppm of Reading + μV) Mode ± ppm 2 Years 90 Days 1 Year 2 Years 10 Hz - 20 Hz 20 Hz - 40 Hz 40 Hz - 20 kHz...
  • Page 25 Introduction and Specifications Specifications Secondary Performance and Operating Characteristics Temperature Coefficient 24 Hour AC 0 °C to 10 °C Stability ± 1 °C Input 10 °C to 40 °C Voltage Range Frequency Range 40 °C to 50 °C Slow Filter Peak- Resistance Peak ±...
  • Page 26 5790A Operators Manual Secondary Performance and Operating Characteristics (cont) 24 Hour AC Temperature Coefficient Stability ± 1 °C 0 °C to 10 °C Input 10 °C to 40 °C Voltage Range Frequency Range Slow Filter 40 °C to 50 °C Resistance ±...
  • Page 27 Introduction and Specifications Specifications Secondary Performance and Operating Characteristics (cont) Temperature Coefficient 24 Hour AC Stability ± 1 °C 0 °C to 10 °C Input 10 °C to 40 °C Voltage Range Frequency Range Slow Filter ± (ppm 40 °C to 50 °C Resistance of Reading) PPM / °C...
  • Page 28 5790A Operators Manual More Secondary Performance and Operating Characteristics Maximum Non-destructive Input ......1200 V rms Guard Isolation............ 10 V peak Volt-Hertz Product..........1 x 10 Frequency Accuracy (from 0 °C to 50 °C) 10 Hz - 120 Hz ..........100 ppm + 10 digits Above 120 Hz ..........
  • Page 29 Introduction and Specifications Specifications Wideband Uncertainty Specifications (Option -03) Flatness Absolute Uncertainty 0 °C to 50 °C Flatness 1 year ± 3 °C ± (% of Reading + μV) Voltage Temperature ± (% of Frequency Range Resolution Coefficient Range Reading 90 Days 1 Year 2 Years...
  • Page 30 30 MHz ............50 Ω (± 5 %) Shunt Input Characteristics • The shunt input was designed to allow ac/dc current transfers using the Fluke A40 Series current shunts. • 5790A-7001 A40/A40A Current Shunt Adapter and Cable required. Shunt Model Current Range...
  • Page 31 Introduction and Specifications Specifications A40 ............. 2.5 mA - 5A A40A ............5A - 20A Input Resistance ..........91 Ω ± 1 % Operating Input Voltage ........250 mV to 500 mV Maximum Non-Destructive Input ....50V rms General Specifications Warm-up Time ..........
  • Page 32 5790A Operators Manual 43 cm (17.0 in) 17.8 cm (7.0 in) 63 cm (24.8 in) 6.35 cm (2.5 in) FOR CABLE ACCESS (REAR) add1f.eps Figure 1-1. Dimensions 1-18...

  • Page 33: Installation

    Chapter 2 Installation Title Page 2-1. Introduction ................... 2-3 2-2. Unpacking and Inspection ..............2-3 2-3. Environmental and Input Requirements ..........2-4 2-4. Cooling Considerations................. 2-4 2-5. Placement and Rack Mounting ............. 2-5 2-6. Accessing the Fuse ................2-5 2-7. Selecting Line Voltage ................
  • Page 34 5790A Operators Manual...

  • Page 35: Introduction

    Also check for accessories if any were ordered. If performance tests are required for your acceptance procedures, refer to Section 3 of the 5790A Service Manual for instructions. Line power cords available from Fluke are listed in Table 2-2 and illustrated in Figure 2-1. Table 2-1. Standard Equipment...

  • Page 36: Environmental And Input Requirements

    LC-6 LC-7 add2f.eps Figure 2-1. Line Power Cord Types Available from Fluke 2-3. Environmental and Input Requirements You must operate the 5790A in an ambient temperature within +/-5 °C of the temperature of the last calibration for full accuracy. At any time during operation, press the [SPEC] key to display the temperature of calibration, the absolute uncertainty for the present input, and the number of days since the last calibration.

  • Page 37: Placement And Rack Mounting

    2. Insert the blade of a standard screwdriver in the slot of the fuse holder labeled F1. 3. Turn the screwdriver counterclockwise until the cap and fuse pop free. JOHN FLUKE MFG.CO., INC MADE IN U.S.A VARIOUS ASPECTS OF THIS INSTRUMENT ARE PROTECTED BY ONE OR MORE OF THE FOLLOWING U.S.

  • Page 38: Selecting Line Voltage

    Table 2-2 and Figure 2-1 for a list and illustrations of the line power plug types available from Fluke. Check the line power label on the rear panel of the 5790A to verify that the line voltage matches local line power.
  • Page 39 230V (SB) (SB) 120V 240V RS 232C JOHN FLUKE MFG.CO., INC MADE IN U.S.A VARIOUS ASPECTS OF THIS INSTRUMENT ARE PROTECTED BY ONE OR MORE OF THE FOLLOWING U.S. PATENTS. 4803457, 4860289, 4901052, 4716398, 4847507 NO INTERNAL USER SERVICEABLE PARTS. REFER SERVICE TO QUALIFIED...
  • Page 40 5790A Operators Manual...

  • Page 41: Features

    Chapter 3 Features Title Page 3-1. Introduction ................... 3-3 3-2. Front Panel Features ................3-3 3-3. Rear Panel Features ................3-3...
  • Page 42 5790A Operators Manual...

  • Page 43: Introduction

    Features Introduction 3-1. Introduction Please read the following summary of features before operating the 5790A. Separate illustrations and tables describe the functions and locations of the controls, displays, binding posts, and connectors. 3-2. Front Panel Features Figure 3-1 shows the 5790A front panel features. Table 3-1 describes thesefeatures. 3-3.
  • Page 44 SHUNT Key: Selects the SHUNT to INPUT 2 LO binding posts as the active input. These binding posts are only for connection through the accessory 5790A-7001 adapter cable to a Fluke Model A40 or A40A shunt. EX GRD Opens and closes an internal connection between the GUARD and the INPUT 1 shell (External Guard) and INPUT 2 LO binding post.
  • Page 45 SHUNT Connection point for a Fluke Model A40 or A40A Binding Post Current Shunt adapter. Binding Post The shunt adapter connects etween the SHUNT binding post and INPUT 2 LO. (Do not connect the shunt adapter between SHUNT and GROUND.)
  • Page 46 5790A Operators Manual JOHN FLUKE MFG.CO., INC MADE IN U.S.A VARIOUS ASPECTS OF THIS INSTRUMENT ARE PROTECTED BY ONE OR MORE OF THE FOLLOWING PATENTS. U.S. 4716398 ADDITIONAL PATENTS PENDING NO INTERNAL USER SERVICEABLE PARTS. REFER SERVICE TO QUALIFIED PERSONNEL...
  • Page 47 Features Rear Panel Features Table 3-2. Rear Panel Features (cont.) Ref No. Name Function CALIBRATION MODE A slide switch that selects SERVICE or PERIODIC calibration. Periodic Switch calibration is what you perform at the end of each calibration cycle and is all that is required to keep a normally-functioning 5790A operating in specification.
  • Page 48 5790A Operators Manual...

  • Page 49: Front Panel Operation

    Chapter 4 Front Panel Operation Title Page 4-1. Introduction ................... 4-3 4-2. Turning on the 5790A ................4-3 4-3. Power-Up State ................. 4-3 4-4. Warmup Requirements ..............4-4 4-5. Calibrating DC Zeros ............... 4-5 4-6. Connecting Sources to the 5790A ............4-6 4-7.
  • Page 50 5790A Operators Manual 4-36. Techniques for Reducing Transfer Errors ..........4-27 4-37. DC Reversal..................4-27 4-38. Loading ..................... 4-28 4-39. Mechanical Contact ................4-28 4-40. Thermal EMFs .................. 4-28 4-41. EMI ....................4-28...

  • Page 51: Introduction

    Front Panel Operation Introduction 4-1. Introduction This section presents instructions for operating the 5790A from the front panel. Controls, displays, and terminals are identified and described in detail in Section 3. The first part of this section is general and applies to all modes of operation. Operating instructions are presented separately for measurement mode and transfer mode.

  • Page 52: Warmup Requirements

    5790A Operators Manual (with no stimulus attached), the 5790A autoranges down to the lowest range and the displays appear as shown below: add7f.eps add08a.eps At any time during front panel operation, you can return the 5790A to the power-up state by pressing [RESET].

  • Page 53: Calibrating Dc Zeros

    Front Panel Operation Turning on the 5790A Table 4-2. Nonvolatile Setup Parameter Factory Defaults Factory Default Setup Parameter (Value after Eeprom Format) Cal Interval 1 YEAR Remote Port GPIB IEEE-488 Bus (GPIB) Address EOF Characters FF, NUL Baud Rate 9600 baud Data Bits Stop Bits Parity...

  • Page 54: Connecting Sources To The 5790A

    Avoid using nickel-plated connectors. Optimum results can be obtained by using Fluke Model 5440A-7002 Low Thermal EMF Test Leads, which are constructed of well-insulated copper wire and tellurium copper connectors.

  • Page 55: Connecting The Guard And Ground Binding Posts

    Front Panel Operation Connecting Sources to the 5790A Table 4-3. Input Test Lead Summary Input Frequency Input Connector dc to 100 kHz 100 to 300 kHz 300 kHz to 1 MHz 1 to 30 MHz INPUT 1 TYPE Coax any Length Coax Up to 3 ft Coax Up to 1 f.

  • Page 56: Guard Theory

    5790A Operators Manual 4-11. Guard Theory The GUARD is an electrical shield around the sensitive analog circuitry, insulated from chassis ground and the rest of the 5790A. 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 plugging interconnected instruments into ac outlets at different ground potentials.
  • Page 57 Front Panel Operation Connecting Sources to the 5790A PLANE OF REFERENCE 5790A EXT GRD UUT DMM EXT GRD GUARD Use HEAVY BRAID SOURCE INT GRD 5790A AC MEASUREMENT STANDARD LOCATION OF EXTERNAL ATTENUATOR (IF USED) add9f.eps Figure 4-1. Recommended Test Lead Connections to Test a Voltmeter...

  • Page 58: External Guard Connection

    5790A Operators Manual PLANE OF REFERENCE 5790A EXT GRD GUARD Use HEAVY BRAID UUT SOURCE 5790A AC MEASUREMENT STANDARD INPUT add10f.eps Figure 4-2. Recommended Test Lead Connections to Test a Source 4-13. External Guard Connection For some conditions, such as low-frequency common mode interference, better results may be obtained by using the external guard configuration.

  • Page 59: Operating Instructions For All Modes

    Front Panel Operation Operating Instructions for all Modes Note Whenever EXT GUARD is activated (the green indicator on the EX GRD key is on), you must refresh the guard status after the instrument changes from the 220V range to any higher range. To refresh, push the EX GRD key two times (once to turn the indicator off, and once to turn the indicator on).

  • Page 60: Using The Measurement Control Menu

    5790A Operators Manual Table 4-6. Measurement Display Frequency Resolution Frequency Range Decimal Places Shown 9.00 to 119.99 Hz 0.1200 to 1.1999 kHz 1.200 to 11.999 kHz 12.00 to 119.99 kHz 0.1200 to 1.1999 MHz 1.200 to 11.999 MHz 12.00 to 30.00 MHz The upper display shows the magnitude of the applied signal in volts (V) or millivolts (mV).

  • Page 61: Digital Filter Mode Softkey

    Front Panel Operation Operating Instructions for all Modes add08c.eps 4-17. Digital Filter Mode Softkey You can use the digital filter to obtain optimum results in measurement environments with various levels of noise. When enabled, a software digital filter makes the displayed measurement become a window average of the 4, 16, or 32 most recent measurements.

  • Page 62: Hi Res Softkey

    5790A Operators Manual Note If you change the input voltage slightly with the filter active, you will not get correct readings until the filter has been completely flushed. With the RESTART threshold set to coarse and a small input change, the "U" annunciator may not light.

  • Page 63: Selecting Continuous Or External (Single) Trigger

    Front Panel Operation Instructions for Measurement Mode tracks the source instrument and appears to oscillate between ranges. The 5790A should be range locked to the desired range and then the voltage applied from either 5205A or 5215A. This will prevent a cyclic auto-range condition between the 5790A, 5205A, and 5215A instruments.

  • Page 64: Instructions For Transfer Mode

    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 5700A Calibrator. In transfer mode, you can use an external source to establish a reference, and the uncertainty of the measurement is governed by 5790A ac-dc difference specifications in addition to the uncertainty of the dc source.

  • Page 65: Using The Shunt Input For Relative Current

    To measure relative (not absolute) current, you have two choices: Accessory 5790A-7001 allows you to connect Fluke A40 or A40A Current Shunts to the 5790A SHUNT input for making current transfers up to 20A. Accessory 792A-7004 allows you to connect Fluke A40 Current Shunt to the INPUT 1 Type "N"...
  • Page 66 Better uncertainties can be obtained by characterizing the A40 Current Shunt (with the 792A-7004 Adapter) for AC/DC current difference. This characterization can be done by NIST or at our Fluke Standards Laboratory. At the Fluke Lab this characterization is performed at specific currents and frequencies with present uncertainties as low a 100 ppm.

  • Page 67: Choosing Delta Units

    Front Panel Operation Instructions for Transfer Mode 2. Connect a Model A40 (not A40A) Current Shunt to the adapter. 3. Connect the current shunt to the ac current source under test. 4. Press the [INPUT1] key so that its keycap indicator lights. 5.
  • Page 68 5790A Operators Manual add08h.eps Reverse the polarity of the dc input and press the "Avg Ref" softkey to correct for dc reversal error. The 5790A averages a new measurement taken from INPUT 2 with the previously stored reference. The displays now appear as follows: add17f.eps add08i.eps add08j.eps...

  • Page 69: Using The Top-Level Menu Keys

    Front Panel Operation Using the Top-Level Menu Keys add08l.eps Apply the unknown ac signal. You can use either of the two following methods to determine the error of an ac source: 1. Simply observe the delta display. For this method, accuracy of the transfer relies on the linearity of the transfer standard.

  • Page 70: Util Menus] Key

    5790A Operators Manual add08n.eps If you previously pressed the "Avg Ref" softkey, you will see both input values that were used to compute the averaged reference as follows: add08o.eps Press [VIEW REF] again to return to normal operation. If no reference is set, [VIEW REF] generates a beep.

  • Page 71: Checking Instrument Configuration

    Front Panel Operation Using the Top-Level Menu Keys • Config: Opens a menu that contains two softkeys: one that displays a list of installed hardware modules and software version numbers, and another that displays the contents of the user report string. This section describes how to use these softkeys.

  • Page 72: Setup Menu

    5790A Operators Manual 3. Press "DONE Seeing String" followed by "Show Installed s/w and h/w." Software revisions are shown first. The "Main" software revision refers to software in ROM (Read-Only Memory) on the A20 CPU assembly. The "Inguard" software revision refers to software in ROM on the A17 Guard Crossing/Regulator assembly.

  • Page 73: Format Eeprom Menu

    Front Panel Operation Using the Top-Level Menu Keys • Set Internal Clock: Accesses softkeys that allow you to check and set the date and time for the clock/calendar. This section describes how to set the time and date under the heading "Setting the Internal Clock/Calendar." •...

  • Page 74: Setting The Internal Clock

    5790A Operators Manual add08w.eps If you press the NO softkey, the Control Display reverts to the format EEPROM menu. If you press the YES softkey, nonvolatile memory is restored to defaults as previously described. 4-34. Setting the Internal Clock An internal clock provides the date (corrected for leap years) and time to the 5790A CPU (Central Processing Unit).

  • Page 75: Spec] Key

    Front Panel Operation Techniques for Reducing Transfer Errors 4. The choices available under the "Adjust the" softkey are DAY, MONTH, YEAR, HOUR, MINUTE, and SECOND. The softkeys autorepeat if you hold them down. Press the [^] key to increment, or the [v] key to decrement the selected parameter. Note Time is shown in 24-hour format and includes leading zeros.

  • Page 76: Loading

    5790A Operators Manual 4-38. Loading The 5790A input impedance may affect ac voltage source output levels. Refer to 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 77: Remote Operation

    Chapter 5 Remote Operation Title Page 5-1. Introduction ................... 5-3 5-2. Using the IEEE-488 Interface for Remote Control ....... 5-3 5-3. IEEE-488 Bus Restrictions ............... 5-3 5-4. IEEE-488 Bus Setup Procedure ............5-3 5-5. Using the Rs-232 Interface for Remote Control ........5-4 5-6.
  • Page 78 5790A Operators Manual 5-35. Instrument Status Change Registers ..........5-19 5-36. Instrument Status Change Enable Registers ......... 5-19 5-37. Bit Assignments for the ISR, ISCR, and ISCE ......5-19 5-38. Programming the ISR, ISCR, and ISCE ........5-20 5-39. Output Queue ................... 5-20 5-40.

  • Page 79: Introduction

    IEEE-488.2. Devices connected to the bus in a system are designated as talkers, listeners, talker/listeners, or controllers. Under the remote control of an instrument controller such as the Fluke 1722A, the 5790A operates exclusively as a talker/listener on the IEEE-488 bus.

  • Page 80: Using The Rs-232 Interface For Remote Control

    Attach the IEEE-488 cable to the rear panel IEEE-488 connector. It is recommended that you use Fluke shielded cables Y8021, Y8022, or Y8023, in lengths of 1, 2, or 4 meters, respectively, for this purpose. 5-5. Using the Rs-232 Interface for Remote Control Use these instructions to set up the 5790A's serial interface for remote control using a terminal or computer with a serial interface.
  • Page 81 It is these OMPUTER mode responses that are listed in the remote command information and reference guide. Use a null-modem serial interface cable such as Fluke accessory Y1702 to interconnect your computer or terminal and the RS-232-C connector on the 5790A.

  • Page 82: Exceptions For Serial Remote Control

    5790A Operators Manual 5-7. Exceptions for Serial Remote Control When you use the RS-232-C port to remotely control the 5790A, either interactively with a terminal or under computer control, operation is the same as when you use an IEEE-488 controller connected to the IEEE-488 port for control, with the following exceptions: 1.

  • Page 83: Remote State

    Remote Operation Changing between Remote and Local Operation with lockout state is entered by executing the Fluke 1722A LOCKOUT statement when using the 1722A as an IEEE-488 controller, or by sending the LOCKOUT command described in Section 6 when you use the 1722A serial port to control the 5790A.

  • Page 84: Command Syntax Information

    5790A Operators Manual Table 5-1. Operating State Transitions 1722A Gpib Serial From Command Command Local Remote MLA + REN REMOTE REMOTE Local Local With Lockout LLO + REN LOCKOUT LOCKOUT GTL, or "GO TO LOCAL Remote Local LOCAL LOCAL CONTROL" softkey REMOTE, or any Remote/Lockout MLA + REN...

  • Page 85: Extra Space Or Tab Characters

    Section 6 contains examples for commands whose parameters or responses are not self- explanatory. Remote program examples for the Fluke 1722A Instrument Controller are provided at the end of this section.

  • Page 86: Incoming Character Processing

    ASCII LF character Any ASCII character sent with the EOI control line asserted The terminator used by the Fluke 1722A Instrument Controller for data it sends to instruments on the IEEE-488 bus is programmable, but its default is LF with EOI.
  • Page 87 Remote Operation Input Buffer Operation Table 5-3. Response Data Types Data Type Description Integers for some controllers or computers are decimal numbers in the range -32768 to 32767. Responses in this range are labeled Integer. Integer Example: CMD: *ESE 123; *ESE? RESP: 123 Numbers that may have up to 15 significant figures plus an exponent that may range from +/-E20.

  • Page 88: Using Commands

    (See "Interface Messages" further on in this section for more information.) Commands are sent to the 5790A literally, for example, with the Fluke 1722A BASIC PRINT statement. The commands are described in Section 6. There are three types of commands: Common commands: Commands that start with an asterisk.

  • Page 89: Multiple Commands

    Using Commands 5-21. Multiple Commands If the controller on the IEEE-488 bus is a Fluke 1722A, commands are sent one at a time or combined in Fluke BASIC PRINT statements. For example, if the 5790A bus address is 6 and you want take a reading on the input at INPUT 2, you could use the following...

  • Page 90: Checking 5790A Status

    5790A Operators Manual 5-25. Checking 5790A Status The programmer has access to status registers, enable registers, and queues in the 5790A to indicate various conditions in the instrument as shown in Figure 5-1. Some registers and queues are defined by the IEEE-488.2 standard. The rest are specific to the 5790A. In addition to the status registers, the Service Request control line, SRQ, and a 16-element buffer called the Error Queue provide status information.

  • Page 91: Programming The Stb And Sre

    Remote Operation Checking 5790A Status 5-29. Programming the STB and SRE By resetting (to 0) the bits in the SRE, you can mask (disable) associated bits in the serial poll status byte. Bits set to 1 enable the associated bit in the serial poll status byte. The following sample program enables the Error Available (EAV) bit.
  • Page 92 5790A Operators Manual Instrument Status 8 7 6 5 4 3 2 1 0 Change Enable Register & Reading Using ISCE0? & Write to Using ISCE0 & & & & & & & & & & & & & & Instrument Status Change Registers 8 7 6 5 4 3 2 1 0...

  • Page 93: Event Status Register (Esr)

    Remote Operation Checking 5790A Status Table 5-4. Status Register Summary Register Read Command Write Command Enable Register (STB) *STB? (or SPL) Serial Poll Status Byte None for 1722A) Service Request Enable *SRE? *SRE None Register (SRE) Event Status Register *ESR? *ESE None (ESR)
  • Page 94 5790A Operators Manual ISCB Remote idle. Set to 1 when the remote interface is waiting for input. RQS Requesting service. The RQS bit is set to 1 whenever bits ESB, MAV, EAV, or ISCB change from 0 to 1 and are enabled (1) in the SRE. When RQS is 1, the 5790A asserts the SRQ control line on the IEEE-488 interface.

  • Page 95: Instrument Status Register (Isr)

    Remote Operation Checking 5790A Status 5-34. Instrument Status Register (ISR) The Instrument Status Register (ISR) gives the controller access to the state of the 5790A, including some of the information presented to the operator on the Control Display and the display annunciators during local operation. Power on.

  • Page 96: Programming The Isr, Iscr, And Isce

    The output queue is loaded whenever a query is processed, and holds up to 128 characters. The controller reads it with a statement such as the Fluke 1722A BASIC INPUT statement, removing what it reads form the queue. If the queue is empty, the 5790A does not respond to the INPUT statement from the controller.

  • Page 97: Ieee-488 Interface Configuration

    Remote Operation IEEE-488 Interface Configuration Byte indicates whether the queue is empty. The error queue is cleared when you turn off the power, and when you use the *CLS (Clear Status) common command. REMOTE RPTBUSY MCCHG MDCHG INPCHG RNGCHG VALID BUSY REMOTE Set to 1 when the 5790A is under remote control.

  • Page 98: Bus Communication Overview

    5790A Operators Manual 5-42. Bus Communication Overview Communication between the controller and the 5790A takes place using commands established by IEEE-488 standards and commands specifically related to the 5790A. The commands listed in Section 6 are all the remote commands, both common and device- dependent.

  • Page 99: Definition: Queries And Commands

    The following programming examples illustrate ways to handle errors, to take measurements, take a number of successive readings, lock the range, and calibrate the 5790A. These excerpts from programs are written in Fluke BASIC for the Fluke 1722A Instrument Controller.

  • Page 100: Writing An Srq And Error Handler

    5790A Operators Manual 5-50. Writing an SRQ and Error Handler It is good practice to include fault (error) handling routines in your applications. The following sample program lines show a method for halting program execution on occurrence of an SRQ (Service Request) on the bus, checking to see if the 5790A is the source of the SRQ, retrieving its fault messages, and acting on the faults.

  • Page 101: Efficiently Taking N Successive Readings

    Remote Operation Remote Program Examples 5-52. Efficiently Taking N Successive Readings Because MEAS? always restarts the measurement cycle, it is more time efficient to use *WAI;VAL? for taking successive measurements. The following program asks the user for the number of measurements to average, then takes that number of measurements using *WAI;VAL?.
  • Page 102 5790A Operators Manual add statements to control your calibration sources and adjust them as necessary to obtain the required accuracy. 10 REM Periodic calibration from remote interface 20 REM Set Bus Timeout to 20 seconds, init IEEE bus 30 TIMEOUT 20 * 1000 40 INIT PORT 0 50 A% = 6 ! IEEE address of 5790A...

  • Page 103: The Ieee-488 Connector

    Remote Operation The IEEE-488 Connector 2000 REM Wait for a 5790A command to complete, polling the ESR 2010 PRINT @A%, "*OPC" 2020 PRINT @A%, "*ESR?" 2030 INPUT @A%, ES% 2040 IF ((ES% AND 1%) = 0) GOTO 2020 2050 RET 5-55.
  • Page 104 5790A Operators Manual NON-DECIMAL NUMERIC PROGRAM A data type suitable for sending integer numeric representations DATA in base 16, 8, or 2. An optional field following DECIMAL NUMERIC PROGRAM SUFFIX PROGRAM DATA DATA used to indicate associated multipliers and units. A data type suitable for sending 7-bit ASCII character strings STRING PROGRAM DATA where the content needs to be "hidden"...
  • Page 105 Remote Operation The IEEE-488 Connector Does the same thing as DCL, but only if Selected Device the 5790A is currently addressed as a CLEAR @ Clear listener. Cancels the effect of a Serial Poll Enable. (Part of SPL) Serial Poll Disable After the 5790A receives this message, it sends the Status Byte the next time it Serial Poll Enable...
  • Page 106 5790A Operators Manual SHIELD SRQ NDAC DAV DIO4 DIO2 DIO3 DIO1 NFRD REN DIO7 DIO5 LOGIC DIO8 DIO6 add51f.eps Figure 5-5. IEEE-488 connector pinout (Rear Panel View) 5-30...

  • Page 107: Remote Commands

    Chapter 6 Remote Commands Title Page 6-1. Introduction ................... 6-3 6-2. Alphabetical List of IEEE-488.2 Common Commands ......6-7 6-3. Alphabetical List of 5790A Device-Dependent Commands ....6-13...
  • Page 108 5790A Operators Manual...

  • Page 109: Introduction

    Remote Commands Introduction 6-1. Introduction This section documents remote commands for the 5790A AC Measurement Standard. Remote commands duplicate almost all activities that can be initiated from the front panel in local operation. Table 6-1 summarizes the commands by function. Following the summary table is a complete alphabetical listing of all commands complete with protocol details.
  • Page 110 5790A Operators Manual Set Service Request Enable register, described in the Status Information section *SRE below. Query Service Request Enable register, described in the Status Information section *SRE? below. Read status byte. The status byte is described in detail in the instrument status *STB? section below *TRG...
  • Page 111 Remote Commands Introduction IRES? Returns the setting of the HIRES command. INPUT Selects the active input connector INPUT? Returns the active input connector. Triggers (or in continuous trigger, restart trigger) a new measurement, waits for it to complete, then retrieves the value of the present input measurement (the most MEAS? recently completed input measurement).
  • Page 112 5790A Operators Manual ISCE0 Sets the Instrument Status One To Zero Change Enable register ISCE0? Returns the contents of the Instrument Status Zero To One Change Enable register. ISCE1 Sets the Instrument Status Zero To One Change Enable register. ISCE1? Returns the contents of the Instrument Status One To Zero Change Enable register.

  • Page 113: Alphabetical List Of Ieee-488.2 Common Commands

    Remote Commands Alphabetical List of IEEE-488.2 Common Commands CAL_NEXT Initiates the next calibration point. Returns the value of the next point to be calibrated when in the middle of calibrating CAL_NEXT? a range. Cancels any interactive calibration underway (that is, one started with the CAL_AC, CAL_OFF CAL_I2, and CAL_DC commands).
  • Page 114 5790A Operators Manual *ESE Loads a byte into the Event Status Enable Register, described under "Checking 5790A Status." Parameter The decimal equivalent of the 8-bit binary number to load into the register. Each binary digit in the register has a meaning as described in this section under "Checking 5790A Status".
  • Page 115 None Response (IAD) A message containing five fields separated by commas, as follows: 1. Manufacturer (FLUKE) 2. Model number (5790A) 3. Serial number 4. Firmware revision level for the Main CPU 5. Firmware revision level for the Guard Crossing CPU Example FLUKE,5790A,7649820,1.7,1.2...
  • Page 116 5790A Operators Manual Note This mechanism (or *OPC? or *WAI) does not wait for a CAL_PR to complete. Also see ISCR. Note If you use this command for a non-measurement execution to complete, turn off continuous triggering first. If you do not turn off measurements, *OPC (or *OPC? or *WAI) will wait for a measurement to complete.
  • Page 117 Remote Commands Alphabetical List of IEEE-488.2 Common Commands Note The 2 indicates that there is one digit to follow (in this case, "16"), and the 16 indicates that there are 16 characters including space characters in the remainder of the *PUD message (in this case, CAL LAB NUMBER 1). This type of data is called Binary Block Data in the IEEE-488.2 Standard.
  • Page 118 5790A Operators Manual Parameter None Example If you send the compound command "*RST;*OPC?", the *OPC? is not waiting for *RST to complete, it is waiting for the next measurement to complete. *SAV Save the current 5790A operating state in memory for later use with the *RCL command. This command together with *RCL gives you up to 16 operating state memories.

  • Page 119: Alphabetical List Of 5790A Device-Dependent Commands

    Remote Commands Alphabetical List of 5790A Device-Dependent Commands Example *STB? Returns "72" if bits 3 (EAV) and 6 (MSS) are set (1) and the rest of the bits are reset (0). *TRG Triggers a measurement (equivalent to TRIG). Parameter None *TST? Initiates a series of self-tests, then returns a "0"...
  • Page 120 5790A Operators Manual Example If you send the compound command "ABORT;*OPC?", the *OPC? is not waiting for ABORT to complete, it is waiting for the next measurement to complete. CAL_AC Begins an interactive ac calibration procedure for one range or all ranges. This does not do a calibration step, but sets up the 5790A so the next CAL_NEXT command does the first step and the next CAL_NEXT? command returns the first step.
  • Page 121 Remote Commands Alphabetical List of 5790A Device-Dependent Commands <last step amplitude>,<last step frequency><EOL> <range 2 max> etc. Example CAL_AC? INPUT1,2.0 (with the CALIBRATION MODE switch in SERVICE) Gives the response: 2.200000e+00,4 2.000000e+00,1.000000e+01 2.000000e+00,1.000000e+02 2.000000e+00,1.000000e+05 2.000000e+00,1.000000e+06 CAL_BACKUP If a calibration step has been done since the last CAL_AC or CAL_DC command, this command backs the CAL_NEXT pointer one step.
  • Page 122 5790A Operators Manual CAL_DATE? Returns the date of the most recent calibration. Parameters 1. ACTIVE, STORED, or OLD (which set the date comes from) 2. One of the following keywords: • MAIN (Entire main input calibration) • WBND (Wideband calibration) •...
  • Page 123 Remote Commands Alphabetical List of 5790A Device-Dependent Commands Example An example sequence of commands for calibrating a range (in this case, the 220 mV range) is as follows: CAL_TEMP 23.5 CAL_DC INPUT2, 200 mV CAL_NEXT 200 mV CAL_NEXT -200 mV An error occurs if either the entered value is out of range or the measured input is out of range.
  • Page 124 5790A Operators Manual CAL_FPT? Supplies the first two parameters to be used with a CAL_FPT to correct the next calibration step to be performed. Parameter None Response 1. (Float) A number signifying the range amplitude (as in the RANGE command) 2.
  • Page 125 Remote Commands Alphabetical List of 5790A Device-Dependent Commands Parameter None Response (CRD) INPUT1, INPUT2, WBND, or NONE CAL_INTV Sets the calibration interval. This is stored in nonvolatile memory and used to calculate the output uncertainty. Parameter The number of days in the calibration interval. Must be 90, 365, or 730. CAL_INTV? Returns the calibration interval.
  • Page 126 5790A Operators Manual Parameter (Optional. If omitted, the nominal amplitude is used.) A number signifying reference amplitude (must be within a certain percentage of the expected amplitude, obtainable using the CAL_NEXT? command. CAL_NEXT? Returns the value of the next point to be calibrated when in the process of calibrating a range.
  • Page 127 Remote Commands Alphabetical List of 5790A Device-Dependent Commands CAL_RPT? Returns a listing of a calibration report. (The same report as is printed to the serial port when you use the CAL_PR command, but with no page formatting.) Parameters • ACTIVE (The shifts resulting from the last calibration) •...
  • Page 128 5790A Operators Manual 3. The value at which to show the shift. This parameter selects the range the same way as in the RANGE command. Response (Float) The shift in PPM CAL_SPEC? Calculates and returns the absolute uncertainty specification for a specific input, value (and range), and frequency.
  • Page 129 Remote Commands Alphabetical List of 5790A Device-Dependent Commands • ZC (DC zeros calibration) • WDC (Wideband 1 kHz calibration) • WAC (Wideband Flatness) • ALL (All of the above; use this to store CAL_I2 constants) • A group name from Appendix C, e.g., AC_2_2V CAL_STORE? Tells how many calibration constant groups have been updated but not saved.
  • Page 130 5790A Operators Manual • AC (AC calibration) • ZC (DC zeros calibration) • WDC (Wideband 1 kHz calibration) • WAC (Wideband Flatness) • ALL (All of the above) • A group name from Appendix C, e.g., AC_2_2V Response (Integer) The temperature in oC. CAL_ZERO Executes dc zeros calibration.
  • Page 131 Remote Commands Alphabetical List of 5790A Device-Dependent Commands If the clock/calendar is set to 3 p.m., September 1, 1991. CMDSTR? Returns the command string (if possible) associated with the last error. Parameter None Response (String) The erroneous command string DATEFMT Sets the format in which dates are entered and returned (and shown on the front panel).
  • Page 132 5790A Operators Manual Parameter 1. OFF, SLOW, MEDIUM, or FAST (the setting for mode) 2. (Optional) FINE, COARSE, or MEDIUM (the setting for restart threshold) DFILT? Returns the digital filter parameter settings. Parameter None Response 1. (CRD) OFF, SLOW, MEDIUM, or FAST (the setting for mode) 2.
  • Page 133 Remote Commands Alphabetical List of 5790A Device-Dependent Commands Response (CRD) HALT, ABORT, or CONT (see the DIAGFLT command for meanings) DUNIT Sets the delta unit value. (Also see the DELTA? command.) The default is PPM. (Nonvolatile.) Parameter PPM, PCT, V, or RATIO DUNIT? Returns the currently programmed delta units.
  • Page 134 5790A Operators Manual Response 1. (Integer) The error code 2. (String) The error message string, formatted for display ETIME? Elapsed time query. The response is the total number of minutes that the power switch has been on for the life of the instrument. An application for this command would be to help monitor an interval you set for cleaning the air filter.
  • Page 135 Remote Commands Alphabetical List of 5790A Device-Dependent Commands Parameter ON or non-zero (external trigger), or OFF or 0 (autotrigger) 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 5790A error queue, then removes that error code from the queue.
  • Page 136 5790A Operators Manual data permanently. The CALIBRATION STORE switch must be set to ENABLE and the CALIBRATION MODE switch must be set to SERVICE to replace ALL or CAL data or an execution error occurs. Parameter • ALL (Replaces the whole contents with defaults) •...
  • Page 137 Remote Commands Alphabetical List of 5790A Device-Dependent Commands Example ISCE0 52 Loads 00000000 00110100 into the register, enabling bits 5 (MCCHG), 4 (MDCHG), and 2 (RNGCHG). ISCE0? Reads the contents of the Instrument Status 1 to 0 Change Enable register described under "Checking 5790A Status."...
  • Page 138 5790A Operators Manual Returns 52 if bits bits 5 (MCCHG), 4 (MDCHG), and 2 (RNGCHG) are enabled (set to 1) in the Instrument Status 0 to 1 Change Enable register. ISCR0? Reads and clears the contents of the Instrument Status 1 to 0 Change Register described under "Checking 5790A Status."...
  • Page 139 Remote Commands Alphabetical List of 5790A Device-Dependent Commands LOCAL (For serial port remote control only) Puts the 5790A into the local state. This command duplicates the IEEE-488 GTL (Go To Local) message. Parameter None LOCKOUT (For serial port remote control only) Puts the 5790A into the local with lockout state.
  • Page 140 5790A Operators Manual Response (CRD) MEASUREMENT, CALIBRATION, DIAGNOSTIC, or CALWAITING MODESTR? Returns a string that describes what a calibration or diagnostic procedure is doing. Parameter None Response (String) The same string that appears on the Control Display in front panel operation. An empty string if no calibration or diagnostic step is underway.
  • Page 141 Remote Commands Alphabetical List of 5790A Device-Dependent Commands REF? Returns the reference value and its associated parameters. Parameter None Responses: 1. (Float) The reference value. 2. (Float) The frequency of the reference. (If references at two different frequencies were averaged, the second frequency is returned.) 3.
  • Page 142 5790A Operators Manual RPTSTR Sets the user report string. The user report string can be read on the Control Display in local operation, and appears on calibration reports. Do not use control characters (e.g., CRLF, ^D, etc.) in the string. Parameter String of up to 132 characters RPTSTR?
  • Page 143 Remote Commands Alphabetical List of 5790A Device-Dependent Commands Note The "TERM" or "COMP" parameter sets the responses in serial remote control to be appropriate for interactive terminal use or operation under program control. Specifying "TERM" generates remote responses in plain English for a human operator using a terminal.
  • Page 144 5790A Operators Manual Response (String) The serial remote mode SRQ string. TRIG Triggers a measurement. When the 5790A is in manual trigger mode, a measurement begins when you send the TRIG, *TRG, or MEAS? command. Use the EXTRIG? query to determine the trigger mode setting. Parameter None UNCERT?

  • Page 145: Using The Rs-232 Interface

    Chapter 7 Using the RS-232 Interface Title Page 7-1. Introduction ................... 7-3 7-2. Serial Interface Specifications .............. 7-3 7-3. Setting Up and Connecting the Serial Interface ........7-4 7-4. Printing Calibration Reports ..............7-5 7-5. Sample Measurement Shifts Report ..........7-6 7-6.
  • Page 146 5790A Operators Manual...

  • Page 147: Introduction

    25-pin subminiature D connectors must be used to connect the 5790A to other DTE (Data Terminal Equipment) such as printers, video-display terminals, or computers. Recommended cables are Fluke accessories Y1702 or Y1703. The pinout for the 5790A serial interface connector is shown in Figure 7-1. The choices available and the defaults for all programmable interface parameters are shown in Table 7-1.

  • Page 148: Setting Up And Connecting The Serial Interface

    Refer to the specifications for your peripheral device, and proceed as follows to set up the serial interface for your application: 1. Connect an RS-232 null-modem cable such as Fluke accessory Y1702 or Y1703 to the rear panel RS-232 connector and to the peripheral device.

  • Page 149: Printing Calibration Reports

    Using the RS-232 Interface Printing Calibration Reports 6. This step needs to be done only if you are setting up the interface for remote control of the 5790A. Press one of the softkeys under "Remote I/F" to set the label to "TERMINAL" or "computer". "Terminal"...

  • Page 150: Sample Measurement Shifts Report

    Line Feed characters are embedded in the data stream so that the output is paginated for a 66-line page. 7-5. Sample Measurement Shifts Report JOHN FLUKE MFG. CO., INC. 5790 CALIBRATION REPORT Calibration Shifts -- STORED vs. OLD Constants Printed on 12/17/91 at 11:39:00 Serial Number:...
  • Page 151 Using the RS-232 Interface Printing Calibration Reports DC Cal: INPUT1 AC Cal: INPUT1 FREQUENCY STORED vs OLD 1 YEAR ABS SPEC % OF SPEC + DC +0.0 ppm (No Spec) - DC +0.0 ppm (No Spec) 10.0 -606.3 ppm 2290.9 ppm 26.5 % 1.0 kHz -616.8 ppm...
  • Page 152 5790A Operators Manual I2 vs I1 @ 1.0 MHz +1.4 ppm 220 mV RANGE DC Cal: INPUT1 AC Cal: INPUT1 FREQUENCY STORED vs OLD 1 YEAR ABS SPEC % OF SPEC + DC +0.0 ppm (No Spec) - DC +0.0 ppm (No Spec) 10.0 +2.8 ppm...
  • Page 153 Using the RS-232 Interface Printing Calibration Reports 20.0 kHz +0.4 ppm 27.0 ppm +1.5 % 100.0 kHz +1.7 ppm 81.0 ppm +2.1 % 300.0 kHz -2.5 ppm 190.0 ppm -1.3 % 500.0 kHz +3.2 ppm 400.0 ppm +0.8 % 1.0 MHz +70.8 ppm 1200.0 ppm +5.9 %...
  • Page 154 5790A Operators Manual 500.0 kHz +0.0164 % 0.6682 % +2.5 % 1.0 MHz +0.0080 % 0.7836 % +1.0 % 2.0 MHz -0.0042 % 0.7836 % -0.5 % 4.0 MHz +0.0050 % 0.8836 % +0.6 % 8.0 MHz -0.0033 % 0.8836 % -0.4 % 10.0 MHz +0.0028 %...
  • Page 155 Using the RS-232 Interface Printing Calibration Reports 1.0 MHz +0.0008 % 0.5929 % +0.1 % 2.0 MHz +0.0017 % 0.5929 % +0.3 % 4.0 MHz +0.0029 % 0.6129 % +0.5 % 8.0 MHz +0.0072 % 0.6129 % +1.2 % 10.0 MHz +0.0113 % 0.6129 % +1.8 %...

  • Page 156: Sample Calibration Constants Report

    0.7114 % +1.1 % 30.0 MHz +0.0079 % 0.7114 % +1.1 % ---------------------------- END OF REPORT ----------------------------- JOHN FLUKE MFG. CO., INC. 5790 CALIBRATION REPORT 7-6. Sample Calibration Constants Report JOHN FLUKE MFG. CO., INC. 5790 CALIBRATION REPORT Calibration Constant List...
  • Page 157 Using the RS-232 Interface Printing Calibration Reports Null DACg AD_X10_G 7.186980e-08 7.186980e-08 7.186980e-08 Null DACz AD_X10_Z 1.141500e+03 1.141500e+03 1.141500e+03 Sensor(C1) SENSOR_C1 1.007827e+00 1.007827e+00 1.007827e+00 Sensor(C2) SENSOR_C2 2.444168e-03 2.444168e-03 2.444168e-03 LF Linear LN_C 2.346406e-02 2.346406e-02 2.330602e-02 I2vI1<2.2V INPUT2_LO 1.791093e-04 1.791093e-04 1.805283e-04 I2vI1 Mid.
  • Page 158 5790A Operators Manual DC Zero Z_70MV 3.003405e-05 3.003405e-05 3.003405e-05 DC Turnover OF_70MV 3.029944e-06 3.029944e-06 3.029944e-06 Shunt Offset SHO_70MV 2.531815e-06 2.531815e-06 2.531815e-06 10.0 F1_70MV 1.00011296 1.00011296 1.00011731 1.0 kHz F2_70MV 1.00004725 1.00004725 1.00005371 20.0 kHz F3_70MV 1.00005889 1.00005889 1.00005633 300.0 kHz F4_70MV 1.00144648 1.00144648...
  • Page 159 Using the RS-232 Interface Printing Calibration Reports True Gain DI_7VHF 1.000471e+00 1.000471e+00 1.000471e+00 Rough Gain IA_7VHF 3.121418e+00 3.121418e+00 3.121418e+00 DC Zero Z_7VHF 0.000000e+00 0.000000e+00 0.000000e+00 DC Turnover OF_7VHF 2.769412e-03 2.769412e-03 2.769412e-03 100.0 kHz F1_7VHF 1.00034275 1.00034275 1.00034515 300.0 kHz F2_7VHF 1.00197258 1.00197258 1.00197219...
  • Page 160 5790A Operators Manual 300.0 kHz F4_220V 1.00042444 1.00042444 1.00043054 700V RANGE CONSTANT NAME ACTIVE STORED True Gain DI_700V 1.001187e-02 1.001187e-02 1.001187e-02 Rough Gain IA_700V 3.151999e+02 3.151999e+02 3.151999e+02 DC Zero Z_700V 2.722724e-02 2.722724e-02 2.722724e-02 DC Turnover OF_700V -9.239058e-04 -9.239058e-04 -9.239058e-04 10.0 F1_700V 1.00006483 1.00006483...
  • Page 161 Using the RS-232 Interface Printing Calibration Reports 100.0 F2_7MV_WB 1.00000372 1.00000372 0.99999306 1.0 kHz F3_7MV_WB 1.00000000 1.00000000 1.00000000 10.0 kHz F4_7MV_WB 0.99996737 0.99996737 1.00001902 50.0 kHz F5_7MV_WB 0.99936039 0.99936039 0.99937707 200.0 kHz F6_7MV_WB 0.99854364 0.99854364 0.99854902 500.0 kHz F7_7MV_WB 0.99849656 0.99849656 0.99849935 1.0 MHz...
  • Page 162 5790A Operators Manual 15.0 MHz F13_70MV_WB 0.99526398 0.99526398 0.99544172 20.0 MHz F14_70MV_WB 0.99102871 0.99102871 0.99133449 26.0 MHz F15_70MV_WB 0.99258511 0.99258511 0.99314078 30.0 MHz F16_70MV_WB 1.00412847 1.00412847 1.00487431 WIDE BAND 220 mV RANGE CONSTANT NAME ACTIVE STORED True Gain DI_220MV_WB 3.152397e+01 3.152397e+01 3.152397e+01 Rough Gain...
  • Page 163 Using the RS-232 Interface Printing Calibration Reports 100.0 F2_2_2V_WB 1.00000940 1.00000940 1.00001548 1.0 kHz F3_2_2V_WB 1.00000000 1.00000000 1.00000000 10.0 kHz F4_2_2V_WB 1.00005365 1.00005365 1.00004840 50.0 kHz F5_2_2V_WB 0.99983408 0.99983408 0.99983299 200.0 kHz F6_2_2V_WB 0.99968690 0.99968690 0.99968960 500.0 kHz F7_2_2V_WB 0.99988522 0.99988522 0.99988314 1.0 MHz...
  • Page 164 5790A Operators Manual 7-20...

  • Page 165: Operator Maintenance

    Chapter 8 Operator Maintenance Title Page 8-1. Introduction ................... 8-3 8-2. Accessing the Fuse ................8-3 8-3. Cleaning the Air Filter ................8-4 8-4. General Cleaning .................. 8-4 8-5. Calibration .................... 8-5...
  • Page 166 5790A Operators Manual...

  • Page 167: Introduction

    2. Insert the blade of a standard screwdriver in the slot of the fuse holder. 3. Turn the screwdriver counterclockwise until the cap and fuse pop free. JOHN FLUKE MFG.CO., INC MADE IN U.S.A VARIOUS ASPECTS OF THIS INSTRUMENT ARE PROTECTED BY ONE OR MORE OF THE FOLLOWING U.S.

  • Page 168: Cleaning The Air Filter

    Rinse the filter element in fresh running water. c. Shake out the excess water, then allow the filter element to dry thoroughly before reinstalling it. JOHN FLUKE MFG.CO., INC MADE IN U.S.A VARIOUS ASPECTS OF THIS INSTRUMENT ARE PROTECTED BY ONE OR MORE OF THE FOLLOWING U.S.

  • Page 169: Calibration

    Operator Maintenance Calibration  Caution Do not use aromatic hydrocarbons or chlorinated solvents for cleaning. They can damage the plastic materials used in the 5790A. 8-5. Calibration When shipped, your 5790A is calibrated at the factory, traceable to the U.S. National Institute of Standards and Technology.
  • Page 170 5790A Operators Manual...

  • Page 171: Options And Accessories

    Accessories ................... 9-3 9-4. Fluke A40 and A40A Current Shunt Adapter (5790A-7001) ..9-3 9-5. Fluke A40A Current Shunt Adapter for Input 1 (792A-7004) ..9-3 9-6. Low Thermal EMF Test Leads (5440A-7002) ......... 9-4 9-7. Rack Mount Kit (Y5737)..............9-4 9-8.
  • Page 172 5790A Operators Manual...

  • Page 173: Introduction

    5790A AC Measurement Standard. Section 4 contains instructions for operating the 5790A with the options and accessories described here. To order options or accessories, call or write to a Fluke sales or Technical Service Center. 9-2. Wideband Module (Option 5790A-03) To measure ac voltage in the 1 to 30 MHz range, the 5790A requires the 5790A-03 Wideband Module.

  • Page 174: Low Thermal Emf Test Leads (5440A-7002)

    5790A Operators Manual 9-6. Low Thermal EMF Test Leads (5440A-7002) Model 5440A-7002 Low Thermal Test Leads are designed to exhibit low thermal emfs. The set includes three cables, each made up of two conductors and a shield lead. 9-7. Rack Mount Kit (Y5737) The rack mount kit provides all the hardware necessary to mount the 5790A on slides in a 24-inch (61 cm) equipment rack.

  • Page 175: Appendices

    Appendices Appendix Title Page Glossary of AC-DC Transfer Related Terms ..........A-1 ASCII and IEEE-488 Bus Codes ................ B-1 Calibration Constant Information ................ C-1 5790A Error Codes ..................... D-1 5200A Verification and Calibration ..............E-1...
  • Page 176 5790A Operators Manual...

  • Page 177: A Glossary Of Ac-Dc Transfer Related Terms

    A stable object that produces or embodies a physical quantity for use as a reference standard. An artifact standard may have an assigned traceable value when used for calibration purposes. Fluke 732A DC Voltage Reference Standard and the Fluke 742A Series Standard Resistors are examples. Also see "transfer standard".
  • Page 178 5790A Operators Manual 1. An ac measurement 2. An ac-dc difference measurement In an ac measurement, the transfer standard is used to determine absolute rms ac voltage level. In an ac-dc difference measurement, the transfer standard is a reference that tests the ac and dc response of another transfer standard.
  • Page 179 Appendices Glossary of AC-DC Transfer Related Terms common mode noise An undesired signal that exists between a device's terminals and ground. Common mode noise is at the same potential on both terminals of a device. Also see "normal mode noise". compliance voltage The maximum voltage that a constant-current source can supply.
  • Page 180 5790A Operators Manual ground The voltage reference point in a circuit. Earth ground is a connection through a ground rod or other conductor to the earth, usually accessible through the ground conductor in an ac power receptacle. ground loop Undesirable current induced when there is more than one chassis ground potential in a system of instruments.
  • Page 181 Appendices Glossary of AC-DC Transfer Related Terms minimum use specifications Specifications computed to satisfy the calibration requirements of measurement or source device (UUT). Usually determined by a specified test uncertainty ratio between the absolute uncertainties of the UUT and its required calibration equipment. Also see Test Uncertainty Ratio.
  • Page 182 5790A Operators Manual reliability A measure of the probability of failure of an instrument. repeatability See "precision". resistance A property of a conductor that determines the amount of current that will flow when a given amount of voltage exists across the conductor. Resistance is measured in ohms. One ohm is the resistance through which one volt of potential will cause one ampere of current to flow.
  • Page 183 Appendices Glossary of AC-DC Transfer Related Terms shield A grounded covering device designed to protect a circuit or cable from electromagnetic interference. Also see "guard". SI System of Units The accepted International System of Units. See also "units," "base units," and "derived units."...
  • Page 184 The range of values, usually centered on the indicated or requested value, within which the true, accepted, or consensus value is expected to lie with stated probability or confidence. Fluke uses 99.7% (3\sigma) confidence limits. Uncertainty is a quantification of inaccuracy.

  • Page 185: B Ascii And Ieee-488 Bus Codes

    Appendix B ASCII and IEEE-488 Bus Codes...
  • Page 186 5790A Operators Manual...
  • Page 187 Appendices ASCII and IEEE-488 Bus Codes...
  • Page 188 5790A Operators Manual...
  • Page 189 Appendix C 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 190 5790A Operators Manual Group FREQ: Frequency Counter Gain Name Default Function FREQ_G (see title) Group DC-DAC: Reference DAC Coarse Channel Gain Name Default Function DAC_G 3017.0 (see title) Group WDC_SENSOR: Wideband Sensor Linearization Name Default Function SENSOR_C1_WB 3.162277660e-03 Wideband thermal sensor linearization SENSOR_C2_WB Wideband thermal sensor linearization Group AC_LINEARITY: Low Frequency Linearization...
  • Page 191 Appendices Calibration Constant Information Group AC_2_2MV: Flatness Constants, 2.2 mV Range Name Default Function F1_2_2MV (10 Hz) F2_2_2MV (1 kHz) F3_2_2MV (20 kHz) F4_2_2MV (300 kHz) F5_2_2MV (500 kHz) F6_2_2MV (800 kHz) F7_2_2MV (1 MHz) Group DC_7MV: DC Constants, 7 mV Range Name Default Function...
  • Page 192 5790A Operators Manual Group ZC_22MV: More DC Constants, 22 mV Range Name Default Function Z_22MV Zero calibrated DC offset SHO_22MV Shunt input DC offset IA_22MV 0.01 Rough gain (input to A/D ratio) Group AC_22MV: Flatness Constants, 22 mV Range Name Default Function F1_22MV...
  • Page 193 Appendices Calibration Constant Information Group ZC_220MV: More DC Constants, 220 mV Range Name Default Function Z_220MV Zero calibrated DC offset SHO_220MV Shunt input DC offset IA_220MV Rough gain (input to A/D ratio) Group AC_220MV: Flatness Constants, 220 mV Range Name Default Function F1_220MV...
  • Page 194 5790A Operators Manual Group ZC_2_2MV: More DC Constants, mV Range Name Default Function Z_2_2V Zero calibrated DC offset IA_2_2V Rough gain (input to A/D ratio) Group AC_2_2V: Flatness Constants, mV Range Name Default Function F1_2_2V (10 Hz) F2_2_2V (1 kHz) F3_2_2V (20 kHz) F4_2_2V...

  • Page 195: C Calibration Constant Information

    Appendices Calibration Constant Information Group AC_7VHF: Flatness Constants, High Frequency 7 V Range Name Default Function F1_7VHF (100 Hz) F2_7VHF (300 kHz) F3_7VHF (500 kHz) F4_7VHF (800 kHz) F5_7VHF (1 MHz) Group DC_22 V: DC Constants, 22 V Range Name Default Function DI_22V...
  • Page 196 5790A Operators Manual Group DC_70 V: DC Constants, 70 V Range Name Default Function DI_70V Basic gain (Ref DAC to input ratio) OF_70V Full scale calibrated DC offset Group ZC_70 V: More DC Constants, 70 V Range Name Default Function Z_70V Zero calibrated DC offset IA-70V...

  • Page 197: Calibration Constant Information

    Appendices Calibration Constant Information Group ZC_700 V: More DC Constants, 700 V Range Name Default Function Z_700V Zero calibrated DC offset IA-700V 316.228 Rough gain (input to A/D ratio) Group AC_700 V: Flatness Constants, 700 V Range Name Default Function F1_700V (10 Hz) F2_700V...
  • Page 198 5790A Operators Manual Group WAC_2_2MV: Flatness Constants, Wideband 2.2 mV Range Name Default Function F1_2_2MV_WB (10 Hz) F2_2_2MV_WB (100 Hz) F3_2_2MV_WB (1 kHz) F4_2_2MV_WB (10 kHz) F5_2_2MV_WB (50 kHz) F6_2_2MV_WB (200 kHz) F7_2_2MV_WB (500 kHz) F8_2_2MV_WB (1 MHz) F9_2_2MV_WB (2 MHz) F10_2_2MV_WB B 1.0 (4 MHz)
  • Page 199 Appendices Calibration Constant Information Group WAC_7MV: Flatness Constants, Wideband 7 mV Range Name Default Function F1_7MV_WB (10 Hz) F2_7MV_WB (100 Hz) F3_7MV_WB (1 kHz) F4_7MV_WB (10 kHz) F5_7MV_WB (50 kHz) F6_7MV_WB (200 kHz) F7_7MV_WB (500 kHz) F8_7MV_WB (1 MHz) F9_7MV_WB (2 MHz) F10_7MV_WB (4 MHz)
  • Page 200 5790A Operators Manual Group WAC_22MV: Flatness Constants, Wideband 22 mV Range (cont) F7_22MV_WB (500 kHz) F8_22MV_WB (1 MHz) F9_22MV_WB (2 MHz) F10_22MV_WB (4 MHz) F11_22MV_WB (8 MHz) F12_22MV_WB (10 MHz) F13_22MV_WB (15 MHz) F14_22MV_WB (20 MHz) F15_22MV_WB (26 MHz) F16_22MV_WB (30 MHz) Group WDC_70MV: Gain Constants, Wideband 70 mV Range Name...
  • Page 201 Appendices Calibration Constant Information Group WDC_220MV: Gain Constants, Wideband 220 mV Range Name Default Function DI_220MV_WB 31.6228 Basic gain (Ref DAC to input ratio) IA_220MV_WB 3.16228 Rough gain (input to A/D ratio) Group WAC_220MV: Flatness Constants, Wideband 220 mV Range Name Default Function...
  • Page 202 5790A Operators Manual Group WAC_700MV: Flatness Constants, Wideband 700 mV Range (cont) F7_700MV_WB (500 kHz) F8_700MV_WB (1 MHz) F9_700MV_WB (2 MHz) F10_700MV_WB B 1.0 (4 MHz) F11_700MV_WB B 1.0 (8 MHz) F12_700MV_WB B 1.0 (10 MHz) F13_700MV_WB B 1.0 (15 MHz) F14_700MV_WB B 1.0 (20 MHz)
  • Page 203 Appendices Calibration Constant Information Group WDC_7V: Gain Constants, Wideband 7 V Range Name Default Function DI_7V_WB Basic gain (Ref DAC to input ratio) IA_7V_WB 100.0 Rough gain (input to A/D ratio) Group WAC_7V: Flatness Constants, Wideband 7 V Range Name Default Function F1_7V_WB...
  • Page 204 5790A Operators Manual C-16...

  • Page 205: D 5790A Error Codes

    Appendix D 5790A Error Codes Error Codes 0 ERR • No errors 1 ERR • Error queue is full 100 CAL • Invalide procedure number 101 CAL • No such step in procedure 102 CAL • No Cal/Diag procedure underway 103 CAL •...
  • Page 206 5790A Operators Manual 124 CAL • Temperature gain is zero 125 CAL • New temperature Zero out of limits 126 CAL • CAL switches must be ENABLE and SERVICE 127 CAL • INPUT2 Correction factor out of limits 128 CAL •...
  • Page 207 Appendices 5790A Error Codes 700 GX • ACK queue full 701 GX • Both sides of GX want to be master 702 GX • Both sides of GX want to be slave 703 GX • Couldn't ACK packet from inguard 704 GX •...
  • Page 208 5790A Operators Manual 1360 REM • Bad binary number 1361 REM • Bad binary block 1362 REM • Bad character 1363 REM • Bad decimal number 1364 REM • Exponent magnitude too large 1365 REM • Bad hexadecimal block 1366 REM •...
  • Page 209 Appendices 5790A Error Codes 2204 UT • Domain error %s 2205 UT • Singularity %s 2206 UT • Overflow %s 2207 UT • Underflow %s 2208 UT • Error %s 2209 UT • 2300 WD • Watchdog timed out (tid=%d) 65535 ERR •...
  • Page 210 5790A Operators Manual...

  • Page 211: E 5200A Verification And Calibration

    5200A manual as written. Table F-1. Additional Test Accessories Accessories Model Ferrite Toroid Core Fluke PN 851188 3-Foot Coax Cable with BNC Male Connectors RG58A/U Blocking Capacitor Adapter Two 33 uf 6V Tantalum Capacitors and a 100- k Ω metal film resistor mounted on a Pomona model 1837 plug.
  • Page 212 5790A Operators Manual Performance Verification Checks Starting on page 4-5 of the 5200A manual, the following procedures replace the Output Accuracy Test - Voltage Ranges, Output Accuracy Test - Millivolt Ranges and Voltage Error Control Test. Output Accuracy Test - Voltage Ranges Use the following procedure to perform the output accuracy test.
  • Page 213 Appendices 5200A Verification and Calibration Table F-2. Output Voltage Accuracy Test Tolerances Volts/Range Freq/Range 1/10 10/10 100/100 ±0.02 % ±0.04 %* ±0.02 %* ±0.02 %* 1 kHZ/1 kHz ±0.02 % ±0.04 % ±0.02 % ±0.02 % 20 kHz/100 kHz ±0.05 % ±0.10 % ±0.05 % ±0.05 %...
  • Page 214 5790A Operators Manual Note With internal sensing on the millivolt ranges, capacitive loading causes an increase in the 5200A output in the 100-kHz to 1-MHz range. This increase in output is due to external capacitance being placed in parallel with internal inductance, resulting in a parallel tuned circuit.
  • Page 215 Appendices 5200A Verification and Calibration 9. Perform the measurements at the frequencies desired. The readings should not be greater than the values listed for the voltage/frequency selected in Table F-3. 10. Connect the equipment as shown in Figure F-5. 11. Set the 5200A output to 1 mV on the 1-mV range at 1 kHz. 12.
  • Page 216 5790A Operators Manual 8. Check the end point accuracy of the vernier by setting the VERNIER dial to +3.00 and the VOLTAGE ERROR-% switch to X1. The 5790A error display should read between -2.9800 % and -3.0200 %. 9. Set the 5200A VOLTAGE ERROR-% switch to X1. The 5790A error display should read between -0.2980 % and -0.3020 %.
  • Page 217 Appendices 5200A Verification and Calibration High Frequency Zero Calibration Use the following procedure to perform the high frequency zero calibration test: 1. Set the 5200A output to 1 V on the 10 V range and 1 MHz on the 1-MHz range. 2.
  • Page 218 5790A Operators Manual ff6.bmp Figure F-6. Labeled Adjustment Ports Millivolt Amplitude Calibration The following procedures deal with voltage amplitude and linearity for the 1 mV, 10 mV, and 100 mV ranges. Install the inner covers and firmly secure for these tests. Make the adjustments through the marked ports in the instrument compartment inner cover as shown in Figure F-6.
  • Page 219 Appendices 5200A Verification and Calibration Use the following procedure to perform the millivolt range output accuracy test: 1. Connect the equipment as shown in Figure F-3. 2. Set the 5200A output to 100 mV on the 100-mV range and 1 MHz on the 1-MHz range.
  • Page 220 5790A Operators Manual CalPlus GmbH CalPlus GmbH Niederlassung Hamburg Zentrale Berlin Normannenweg 30 • 20537 Hamburg Heerstraße 32 • 14052 Berlin Tel.: 040 3039595-0 • Fax: 040 3039595-50 Tel.: 030 214982-0 • Fax: 030 214982-50 E-10 scopeshop@calplus.de • www.calplus.de office@calplus.de • www.calplus.de...

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