Page 1 ® 5790A AC Measurement Standard Operators Manual PN 893284 January 1992 Rev.4, 1/06 © 1992-2006 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
An Overview of the Features............1-4 1-5. Instruction Manuals ................1-5 1-6. 5790A Operators Manual ..............1-5 1-7. 5790A Remote Programming Reference Guide ....... 1-5 1-8. 5790A Service Manual ..............1-5 1-9. Wideband Module (Option 5790A-03)..........1-5 1-10. Current Shunt Adapters ................ 1-6 1-11.
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 The IEEE-488 Connector..............5-27 Remote Commands................6-1 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 Using the RS-232 Interface ..............7-1 7-1. Introduction................... 7-3 7-2. Serial Interface Specifications .............. 7-3 7-3.
Page 10 9-2. Wideband Module (Option 5790A-03)..........9-3 9-3. 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.
Page 11 List of Tables 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: Introduction And Specifications
An Overview of the Features............1-4 1-5. Instruction Manuals ................1-5 1-6. 5790A Operators Manual ..............1-5 1-7. 5790A Remote Programming Reference Guide ....... 1-5 1-8. 5790A Service Manual ..............1-5 1-9. Wideband Module (Option 5790A-03)..........1-5 1-10. Current Shunt Adapters ................ 1-6 1-11.
Page 16 5790A Operators Manual...
Page 17: Introduction
1-3. Measurement and Transfer Modes With the 5790A you can measure an ac or dc voltage just as you would with a voltmeter (measurement mode), or you can connect an external dc standard for comparison to an applied ac voltage as you would do with an ac-dc transfer standard (transfer mode).
Page 18: An Overview Of The Features
2. Provides you with a softkey to easily correct for dc reversal error. You apply both polarities of dc and the 5790A computes the average of the absolute values of the applied dc.
Page 19: Instruction Manuals
The WIDEBAND input presents a 50Ω load to the source. Signals accepted are from 700 µV to 7 V over a frequency range of 10 Hz to 30 MHz. Only the lower eight 5790A voltage ranges are used by the WIDEBAND input.
Page 20: Current Shunt Adapters
5 A. 1-11. Warranty and Service Information Each 5790A is warranted for a period of 1 year on delivery to the original purchaser. The warranty is printed on the reverse side of the title page of this manual.
Page 21 Introduction and Specifications Absolute Uncertainty 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...
Page 22 5790A Operators Manual Absolute Uncertainty Specifications (cont.) ± 5 °C of Calibration Temperature Absolute Uncertainty Voltage AC/DC Transfer Measurement Mode Frequency Range Mode ± ppm ± (ppm of Reading) Range 2 Years 90 Days 1 Year 2 Years 10 Hz - 20 Hz...
Page 23 Introduction and Specifications Relative Uncertainty 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...
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...
Page 25 Introduction and Specifications Secondary Performance and Operating Characteristics Secondary Performance and Operating Characteristics Temperature Coefficient 24 Hour AC Stability ± 1 °C 0 °C to 10 °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 Voltage Range Frequency Range Slow Filter 10 °C to 40 °C 40 °C to 50 °C Resistance ±...
Page 27 Introduction and Specifications Resolution and Range Limits Secondary Performance and Operating Characteristics (cont) Temperature Coefficient 24 Hour AC Stability ± 1 °C 0 °C to 10 °C Input Voltage Range Frequency Range 10 °C to 40 °C Slow Filter ± (ppm 40 °C to 50 °C Resistance of Reading)
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 Wideband Uncertainty Specifications (Option -03) 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 Range Coefficient...
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: General Specifications
5790A ............95 VA With Wideband Option........ 120 VA Weight 5790A ............24 kg (53 lb) With Wideband ........... 24.5 kg (54 lb) Line Power ............47 Hz to 63 Hz; ± 10 % of selectable line voltages: 100 V, 110 V, 115 V, 120 V, 200 V, 220 V, 230 V, 240 V Safety..............
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................2-6 2-8.
Page 34 5790A Operators Manual...
Page 35: Introduction
WXWarning To avoid electric shock and to conform to IEC Safety Class I, use the 5790A only with sources up to 1000 V dc or rms ac that are protected from short circuit with current-limiting to 200 mA or less.
Page 36: Environmental And Input Requirements
To operate the 5790A outside the specified temperature range, refer to the Specifications in Section 1 for information about temperature constants.
Page 37: Placement And Rack Mounting
(Instructions for cleaning the air filter are in Chapter 8.) 2-5. Placement and Rack Mounting You can place the 5790A on top of a workbench or mount it in a standard 19-inch wide, 24-inch (61-cm) deep equipment rack. For bench-top use, the 5790A is equipped with non-slipping, non-marring feet.
Page 38: Selecting Line Voltage
The 5790A arrives from the factory configured for the line voltage normally appropriate for the country of purchase, or as specified by you at the time of your order. The 5790A also comes with the line power plug appropriate for the country of purchase. If you need a different type, refer to Table 2-2 and Figure 2-1 for a list and illustrations of the line power plug types available from Fluke.
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
3-2. Front Panel Features Figure 3-1 shows the 5790A front panel features. Table 3-1 describes thesefeatures. 3-3. Rear Panel Features Figure 3-2 shows the 5790A rear panel features. Table 3-2 describes these features. AC MEASUREMENT 5790A STANDARD...
Page 44: Front Panel Features
INPUT 2 Key: Selects the INPUT 2 binding posts as the active input. WBND Key: Selects the WIDEBAND 50\Q Type "N" connector as the active input, but only if the Option 5790A-03 Wideband Module is installed. This key generates a beep if no Wideband Module is installed.
Page 45 Displays the amplitude, frequency, and input connector of the stored eference, if in transfer mode. If the 5790A is in measurement mode (no reference is set) this key generates a beep. Press the key again to return to normal operation.
Page 46 Function Fan Filter The filter covers the air intake to keep dust and debris out of chassis air baffles. Fans inside the 5790A provide a constant cooling air flow throughout the chassis. IEEE-488 Connector A standard interface connector for operating the 5790A in remote control as a Talker/Listener on the IEEE-488 Bus.
Page 47 A male (DTE) serial port connector for transmitting internal calibration constant data to a printer, monitor, or host computer, and for remote control of the 5790A. Section 7 describes proper cabling, how to set up the serial interface, and how to transmit data from the 5790A. Section 5 describes how to use the serial interface for remote control.
Page 48 5790A Operators Manual...
Page 49: Front Panel Operation
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. Test Leads and Connectors............... 4-6 4-8. Coaxial Inputs ................4-6 4-9. Dual Banana Inputs ..............4-6 4-10.
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
When you turn on the 5790A, it undergoes thorough self testing, and the Control Display shows the name of the test in progress. If a self test fails, a prompt on the Control Display identifies the failed test and prevents further operation of the instrument.
Page 52: Warmup Requirements
Section 1. If you turn off the 5790A after it has warmed up, allow it to warm up again for at least twice the length of time it was turned off (up to a maximum of 30 minutes of warm-up). For example, if the 5790A is turned off for 10 minutes, allow it to warm up again for at least 20 minutes.
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...
Page 54: Connecting Sources To The 5790A
4-9. Dual Banana Inputs You can connect test leads to the 5790A INPUT 2, GUARD, and GROUND binding posts using banana plugs, spade lugs, or stripped insulated wire. Make all screw-on connections tight. To avoid errors induced by thermal voltages (thermal emfs), use connectors and conductors made of copper or materials that generate small thermal emfs when joined to copper.
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
3. If attenuation is used, attenuate near the source. 4. Select 5790A [EX GRD]. Connect the GUARD of the 5790A to the GUARD of the source and UUT. This will help prevent ground signals from being capactivety...
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
When the input frequency is below 9 Hz, the frequency portion of the display is blank. When the 5790A has not taken a measurement since power up, or an action such as an input or range change has invalidated a measurement in progress, the display shows dashes instead of numerals: add7f.eps...
Page 61: Digital Filter Mode Softkey
The digital filter affects the value shown on the Measurement Display as well as the value used for references and delta computations on the Control Display when the 5790A is in transfer mode.
Page 62: Hi Res Softkey
5 for the effect of this softkey. 4-20. Selecting Auto or Locked Range When set to autorange, the 5790A ranges up or down and usually selects the best range in which to measure a voltage. However, for measurements near full-scale, you may need to lock the range to keep the 5790A in the desired range.
Page 63: Selecting Continuous Or External (Single) Trigger
When the Digital Filter is active and the 5790A is in external trigger mode, pressing [TRIG] begins a series of measurements. When the filter is full, the "U" annunciator goes out and the 5790A stops sampling the input until you press [TRIG] again or change to autotrigger mode.
Page 64: Instructions For Transfer Mode
To determine the error of an ac voltmeter using measurement mode, apply an ac source to the 5790A input and the ac voltmeter input in parallel. Refer to Figure 4-1 for test lead connection guidelines. If you press the "Set Ref"...
Page 65: Using The Shunt Input For Relative Current
In this application, the 792A-7004 Adapter is connected to Input 1 of the 5790A. Figure 4-4 shows how the 792A-7004 Adapter can be used with Input 1 of the 5790A for AC/DC current transfers. (The A40A Current Shunts have UHF type connectors.
Page 66 A40 or A40A Current Shunts. When using the 5790A Shunt Input, where the resistor is internal in the 5790A, the 5790A must be characterized with the A40 or A40A Current Shunts. Since this would tie up the entire 5790A Measurement Standard...
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 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...
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
A softkey in this menu displays calibration date information and another opens a calibration report menu for printing data through the RS-232-C interface. Refer to Section 3 of the 5790A Service Manual for full details on calibration. DC zeros calibration is described earlier in this section.
Page 71: Checking Instrument Configuration
4-31. Checking Instrument Configuration The "Config" softkey in the utilities menu shows the serial number of the 5790A as programmed at the factory and presents two softkeys: one that displays a list of installed optional hardware modules and software revision letters, and another that displays the contents of the user report string.
Page 72: Setup Menu
Press the "Cal Interval" softkey as many times as necessary until your selection appears. The cal interval setting defines which internally stored specification table the [SPEC] key refers to and calibration reports use. Section 3 of the 5790A Service Manual describes how to calibrate the 5790A.
Page 73: Format Eeprom Menu
In the case of calibration constants, factory defaults are the starting defaults used for all 5790As. They are not the calibration constants obtained when the 5790A was originally calibrated by the factory before shipment. The function of each softkey is described below: •...
Page 74: Setting The Internal Clock
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). Check the clock setting and set it if necessary. Note A long-life lithium battery keeps the clock running during power-off periods.
Page 75: Spec] Key
At any time during front panel operation, you can display the uncertainty specification of the present output of the 5790A by pressing [SPEC]. To return to normal operation, press the [SPEC] key again. An example of the specification display follows: add08y.eps...
Page 76: Loading
To achieve the highest quality measurements, do not disturb the instrumentation setup during the course of a transfer. Try not to move, jostle, or vibrate the 5790A, the source, or any of the input signal wiring from the time you apply the first input voltage until you take the last reading of the transfer.
Page 77: Remote Operation
5-23. Commands that require the CALIBRATION STORE or MODE Switch to be Enabled............5-13 5-24. Long-Term Commands..............5-13 5-25. Checking 5790A Status ................ 5-14 5-26. Serial Poll Status Byte (STB) ............5-14 5-27. Service Request Line (SRQ) ............5-14 5-28.
Page 78 5-50. Writing an SRQ and Error Handler ..........5-24 5-51. Taking a Measurement ..............5-24 5-52. Efficiently Taking N Successive Readings ........5-25 5-53. Locking the 5790A Range..............5-25 5-54. Calibrating the 5790A Remotely............5-25 5-55. The IEEE-488 Connector..............5-27...
Page 79: Introduction
IEEE-488 instrument controller connected to the IEEE-488 interface connector. When you control the 5790A through the serial port, you can set the 5790A to respond to queries in a conversational style for interactive control purposes, or to respond to queries in an abbreviated style for interpretation by a computer program.
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 Press the softkeys to select the desired stall method, terminal/computer responses, and EOL characters. Choose TERMINAL mode for interactive remote control. Responses from the 5790A are longer and are intended for a human operator using a terminal. Choose COMPUTER mode to get compact responses intended for use by a computer program.
Page 82: Exceptions For Serial Remote Control
These are described with the other commands in Section 6. 5-8. Changing between Remote and Local Operation In addition to local mode (front panel operation) and remote, the 5790A can be placed in a local lockout condition at any time by command of the controller. Combined, the local, remote, and lockout conditions yield four possible operating states described as follows.
Page 83: Remote State
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. 5-11. Remote State When the Remote Enable (REN) line is asserted and the controller addresses the 5790A as a listener, it enters the remote state.
Page 84: Command Syntax Information
(including proper usage of units and multipliers), followed by the rules for extra spaces, followed by the rules for terminator usage. A description of how the 5790A processes incoming characters provides the basis for answering other possible questions about syntax. Information about syntax of response messages is also given.
Page 85: Extra Space Or Tab Characters
5-16. Terminators To signify the end of a response sent to the controller, the 5790A sends a "terminator." The 5790A sends the ASCII character Line Feed with the EOI control line held high as the terminator for response messages.
Page 86: Incoming Character Processing
Table 5-3. 5-19. Input Buffer Operation As the 5790A receives each data byte from the controller, it places the bytes in a portion of memory called the input buffer. The input buffer holds up to 128 data bytes and operates in a first in, first out fashion.
Page 87: Response Data Types
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
The most important and frequently used register is the serial poll status byte (STB), which the 5790A sends when it responds to a serial poll. This byte is cleared (set to 0) when the power is turned on. The value of this byte at power-on is determined by the value of the service request enable register (SRE), which is saved in nonvolatile memory.
Page 91: Programming The Stb And Sre
EAV bit with the examples above. ! THIS PROGRAM GENERATES AN ERROR AND CHECKS IT PRINT @6, "RANGE 1300V" ! 1300V IS OUT OF 5790A RANGE A% = SPL(6) ! DO A SERIAL POLL IF ((A% AND 80%)=0%)THEN PRINT "EAV and RQS should have been set"...
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 & & & & & & & & & & & & &...
Page 93: Event Status Register (Esr)
ESR or does a device clear, a selected device clear, or sends the reset or *CLS command to the 5790A. The ESE is cleared (set to 0) when the power is turned on. 5-32. Bit assignments for the ESR and ESE The bits in the Event Status Register (ESR) and Event Status Enable register (ESE) are assigned as shown in Figure 5-3.
Page 94 1 and are enabled (1) in the SRE. When RQS is 1, the 5790A asserts the SRQ control line on the IEEE-488 interface. You can do a serial poll to read this bit to see if the 5790A is the source of an SRQ.
Page 95: Instrument Status Register (Isr)
(Instrument Status 1-0 Change Register) and the ISCR1 (Instrument Status 0-1 Change Register). Each status change register has an associated mask register. Each ISCR is cleared (set to 0) when the 5790A is turned on, every time it is read, and at each *CLS (Clear Status) command.
Page 96: Programming The Isr, Iscr, And Isce
ISCE0 or 1, send the remote command, "ISCE0?", or "ISCE1". The 5790A responds by sending a decimal number that represents bits 0 through 15. Every time you read the ISCR0 or 1, its contents are zeroed. The following sample program...
Page 97: Ieee-488 Interface Configuration
VALID Set to 1 when the present measurement is valid. BUSY Set to 1 when the 5790A is a making a measurement, running a calibration or diagnostics procedure, or saving anything to nonvolatile memory. add50f.eps Figure 5-4. Bit Assignments for the ISR, ISCEs and ISCRs The error queue contains up to 16 entries.
Page 98: Bus Communication Overview
5-43. Device-Dependent Commands Device-dependent commands are messages used to transfer information directly between the 5790A and the IEEE-488 controller. Some commands cause an action to take place in the 5790A. Others, called queries in the IEEE standards, ask for information, and always generate a response message from the instrument.
Page 99: Definition: Queries And Commands
Some queries also require the 5790A to take action. For example, the *TST? query has the 5790A do a self test, then send the result to the controller. A query always ends with a question mark. A command never ends with a question mark. (In the alphabetical listing of commands in Section 6, all commands and queries are mixed together and called commands.)
Page 100: Writing An Srq And Error Handler
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. You should modify and extend this code as necessary for your application.
Page 101: Efficiently Taking N Successive Readings
5-54. Calibrating the 5790A Remotely You can calibrate the 5790A remotely instead of using the front panel controls. Calibration is described in detail in Section 3 of the 5790A Service Manual. The procedure involves making connections to the 5790A binding posts during the process, and you need to change the position of the rear panel CALIBRATION switch.
Page 102 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 60 CLEAR @A% 70 PRINT @A%, "*RST" 100 REM Get temperature from operator, and set cal temperature 110 PRINT "Enter ambient temperature: ";...
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: Interface Messages That The 5790A Accepts
Blocks are limited in size to 1024 bytes. A special data type as used in the *PUD command. (See the BINARY BLOCK DATA definition under "Syntax Parameter Rules.") Table 5-7. Interface Messages that the 5790A Accepts Related 1722A Mnemonic Name...
Page 105: Interface Messages That The 5790A Sends
A control line that any device on the bus can Service Request assert to indicate that it requires attention. Refer to "Checking 5790A Status" for details. The Status Byte is what the 5790A sends when it Status Byte responds to a serial poll (interface message SPE).
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
Identification query. Gives an <IAD> that identifies the Model number, instrument *IDN? serial number, and firmware revision levels Returns <IAD> which when sent to 5790A restores it to the state in effect when the *LRN? *LRN? command was executed. Generate the operation complete message in the Event Status Register when all...
Page 110 *STB? section below *TRG Executes the TRIG command Runs some of the 5790A self tests and returns results. The tests included are: ROM *TST? checksum test, nonvolatile memory test. Also see DIAG. Wait-to-Continue Command. This command prevents further remote commands...
Page 111 Clears the reference. REFSET Sets the reference to the value of the present input measurement. Triggers a measurement. When the 5790A is in manual trigger mode, it begins a TRIG measurement when it receives the *TRG, TRIG, or MEAS? command.
Page 112 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. 5790A Calibration, Testing, and Diagnostics Commands ABORT Aborts a measurement, calibration, or diagnostic procedure, or report being printed CAL_AC Begins an interactive ac calibration procedure for an ac range.
Page 113: Alphabetical List Of Ieee-488.2 Common Commands
Sets the temperature for calibration. This should be done before CAL_DC, CAL_I2, and CAL_AC commands. Once set, the temperature is used for all calibration CAL_TEMP activities until changed. If not set before a calibration activity is complete, the 5790A uses a default of 23.0 °C. CAL_TEMP? Returns the most recent calibration temperature for a specified type of calibration.
Page 114 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". You can also send a binary, octal, or hexadecimal number if you precede the number with #b, #o, or #h, respectively.
Page 115 *LRN command which is reserved for this purpose and is not documented beyond here. Parameter None Response An IAD that when later sent to the 5790A recreates the settings present at the time of the *LRN? command. The following operating parameters are saved by this command: • Input Source •...
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 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. In the 5790A, however, you don't need to use this protocol. The parameter: "CAL LAB NUMBER 1"...
Page 118 *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. Once an operating state is saved, it is nonvolatile unless an EEPROM format is done.
Page 119: Alphabetical List Of 5790A Device-Dependent Commands
None Example If you had sent a TRIG command, you can cause the 5790A to wait until the measurement has settled before continuing on to the next command by following TRIG with a *WAI command. This is useful because TRIG is an overlapped command, which means the 5790A would normally go on to process other commands before completing the TRIG command.
Page 120 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.
Page 126 CAL_NEXT? -1.5E-01,0.0E+00 If the 5790A has calibrated the first point of an ac range, the CAL_NEXT? query returns the amplitude and frequency of the next point to be calibrated (the amplitude returned is what would be the default when doing this calibration from the front panel).
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 Sets the temperature for calibration. Do this before you run any calibration procedures. Once set, the temperature is used for all calibration activities until changed. If not set before a calibration activity is complete, the 5790A uses a default of 23.0 °C. Parameter A number signifying the temperature in oC.
Page 130 (Integer) The temperature in oC. CAL_ZERO Executes dc zeros calibration. An error is generated if the 5790A 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 YMD (for YYMMDD in remote and YYMMDD on the display) DELTA? Returns the delta (transfer) value from the 5790A . This is the difference between the reference value in memory and the present input. (Also see the DUNIT command.) Parameters...
Page 132 Determines the response to errors that occur during remote-controlled diagnostics. In all cases the error encountered is logged into the error queue before the 5790A takes any action as set by this command. The settings of this command are saved in nonvolatile memory.
Page 133 (String) The End-Of-File character string ERR? Returns the first error code contained in the 5790A error queue, then removes that error code from the queue. Sent 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 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 (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. You can use the EXPLAIN? query to get an explanation string for a specified error code.
Page 136 (CRD) INPUT1, INPUT2, SHUNT, or WBND ISCE0 Loads two bytes into the Instrument Status 1 to 0 Change Enable register described under "Checking 5790A Status." Parameter The decimal equivalent of the binary number to load into the register. You can also send a binary, octal, or hexadecimal number if you precede the number with #b, #o, or #h, respectively.
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 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 register. ISR? Reads the contents of the Instrument Status Register described under "Checking 5790A Status." Parameter...
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 (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. ONTIME? Returns the time in minutes that the 5790A power has been turned on for the current operating session only. Parameters...
Page 141 (Use REFCLR first in that case.) Parameter None REMOTE (For serial port remote control only) Puts the 5790A into the remote state. This command duplicates the IEEE-488 REN (Remote Enable) message. Parameter None 6-35...
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.
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 (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.
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. Sample Calibration Constants Report..........
Page 146 5790A Operators Manual...
Page 147: Introduction
This section describes how to set up the RS-232 interface for remote control using a protocol similar to IEEE-488, and to print or transmit data from the 5790A. Once you set up the interface for remote control, refer to Section 5 for full details of remote operation.
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
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".
Page 150: Sample Measurement Shifts Report
If the input buffer of the peripheral device fills and the device sends the 5790A a stall command, the 5790A stops sending data and starts a timer. If the timeout period expires, printing is aborted. Press any key to clear the abort message.
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...
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 %...
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...
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...
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...
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
Operator Maintenance Introduction 8-1. Introduction This section explains how to perform the routine maintenance and calibration tasks required to keep a normally operating 5790A AC Measurement Standard in service. These tasks include: • Replacing the fuse • Cleaning the air filter •...
Page 168: Cleaning The Air Filter
Figure 8-2. Accessing the Air Filter 8-4. General Cleaning To keep the 5790A looking like new, clean the case, front panel keys, and lens using a soft cloth slightly dampened with water or a non-abrasive mild cleaning solution that does not harm plastics.
Page 169: Calibration
Institute of Standards and Technology. To maintain traceability, calibrate the 5790A to traceable external standards using proper procedures, as often as required by your choice of calibration cycle: 90 day, 1 year, or 2 years. Refer to Section 3 of the 5790A Service Manual for the calibration procedure.
Page 170 5790A Operators Manual...
Page 171: Options And Accessories
9-2. Wideband Module (Option 5790A-03)..........9-3 9-3. 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.
Page 172 5790A Operators Manual...
Page 173: Introduction
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. Instructions for operating the 5790A in wideband mode are provided in Section 4, and specifications for wideband operation are provided at the end of Section The WIDEBAND input presents a 50Ω...
Page 174: Low Thermal Emf Test Leads (5440A-7002)
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. An instruction sheet is packed with the rack mount kit. 9-8.
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.
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...
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...
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)
Page 195 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...
Page 197: C 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...
Page 199: Calibration Constant Information
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...
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...
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 Verification and Calibration Introduction The 5790A can be used as the measuring device to measure a 5200A AC Calibrator. To do so, replace the procedures in section 4 of the 5200A manual, with the equivalent procedures contained in this appendix. These new procedures will require additional test accessories (see Table F-1).
Page 212 Table F-2. 4. Set the reference voltage of the 5790A to give a direct error read-out as follows: a. Select the desired voltage from the 5200A at 1 kHz.
Page 213 Note Internal sensing is automatic on the 5200A millivolt ranges. 4. Set the reference voltage of the 5790A to give a direct error read-out as follows: a. Set the mode switch to OPR. b. Adjust the 5200A output voltage if necessary to give the exact reading of 100.0000 mV (±10 counts) and push the SET REF soft key on the 5790A.
Page 214 6. Connect the equipment as shown in Figure F-4. 7. Set the 5200A output to 10 mV on the 10-mV range at 1 kHz. 8. Set the reference voltage of the 5790A to give a direct error read-out as follows: a. Set the MODE switch to OPR.
Page 215 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. Set the reference voltage of the 5790A to give a direct error read-out as follows: a. Set the MODE switch to OPR.
Page 216 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 Use the following procedure to perform the high frequency 100 V range calibration test: Set the 5200A output to 10 V on the 100 V range and 1 MHz on the 1-MHz range. 2. Adjust 100V-HIGH FREQ (C3, Attenuator PCB) if necessary to give a 5790A reading of 9.96700 V ±0.00500 V.
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 5790A of 0.0 ±50 ppm. 7. Check the adjustment by rotating the VOLTAGE ERROR-% switch between X1 and OFF positions. The 5790A error display should remain at 0.0 ±50 ppm. Note The toroid and blocking capacitor adapter are required during calibration ONLY, due to equipment characteristics.
Page 220 5790A Operators Manual E-10...

Fluke 5790A Operator's Manual

Introduction and Specifications

Chapter 1

Installation

Chapter 2

Features

Front Panel Operation

Chapter 4

Remote Operation

Chapter 5

Remote Commands

Using the RS-232 Interface

Chapter 7

Operator Maintenance

Chapter 8

Options and Accessories

Appendices

Appendix Page

Quick Links

Related Manuals for Fluke 5790A

Summary of Contents for Fluke 5790A

Table of Contents