Fluke 5790B User manual

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

LIMITED WARRANTY AND LIMITATION OF LIABILITY
Each Fluke product is warranted to be free from defects in material and workmanship under normal use and
service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and
services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of
a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in
Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal
conditions of operation or handling. Fluke warrants that software will operate substantially in accordance
with its functional specifications for 90 days and that it has been properly recorded on non-defective media.
Fluke does not warrant that software will be error free or operate without interruption.
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. Fluke reserves the right to invoice Buyer for importation costs of
repair/replacement parts when product purchased in one country is submitted for repair in another country.
Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair,
or replacement of a defective product which is returned to a Fluke authorized service center within the
warranty period.
To obtain warranty service, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that service center, with a description of the difficulty,
postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following
warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke
determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal
condition of operation or handling, including overvoltage failures caused by use outside the product’s
specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair
costs and obtain authorization before commencing the work. Following repair, the product will be returned to
the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges
(FOB Shipping Point).
THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE
FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES,
INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or
limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not
apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other
decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other
provision.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
11/99

i
Table of Contents
Chapter Title Page
1 Introduction and Specifications......................................................... 1-1
Introduction............................................................................................ 1-1
How to Contact Fluke Calibration.......................................................... 1-2
Safety Information ................................................................................. 1-2
Symbols................................................................................................. 1-4
Measurement and Transfer Modes ....................................................... 1-4
An Overview of the Features................................................................. 1-5
Instruction Manuals ............................................................................... 1-6
5790B Operators Manual .................................................................. 1-6
5790B Service Manual ...................................................................... 1-6
Service Information ............................................................................... 1-6
Specifications ........................................................................................ 1-7
General Specifications .......................................................................... 1-8
Resolution and Range Limits ................................................................ 1-9
Electrical Specifications......................................................................... 1-9
Absolute AC Voltage ......................................................................... 1-9
Relative AC Voltage .......................................................................... 1-12
Absolute AC Non-sine Voltage .......................................................... 1-14
Absolute DC Voltage ......................................................................... 1-15
Relative DC Voltage .......................................................................... 1-15
Secondary Electrical Specifications....................................................... 1-16
AC Secondary Performance.............................................................. 1-16
DC Secondary Performance.............................................................. 1-18
Operating Characteristics .................................................................. 1-19
AUX Input Characteristics ................................................................. 1-20
Absolute Wideband Specifications (5790B/3, 5790B/5, and 5790B/AF) 1-20
2 Installation ........................................................................................... 2-1
Introduction............................................................................................ 2-1
Unpacking and Inspection ..................................................................... 2-1
Environmental and Input Requirements ................................................ 2-2
Placement and Rack Mounting.............................................................. 2-2
Cooling Considerations ......................................................................... 2-3
Grounding the Product .......................................................................... 2-3

5790B
Operators Manual
ii
Mains Voltage Selection........................................................................ 2-4
Connect to Mains Power ....................................................................... 2-5
3 Features ............................................................................................... 3-1
Introduction............................................................................................ 3-1
Front Panel Features............................................................................. 3-1
Rear Panel Features ............................................................................. 3-4
4 Front Panel Operation......................................................................... 4-1
Introduction............................................................................................ 4-1
Turning on the Product.......................................................................... 4-1
Power-Up State ................................................................................. 4-2
Warmup Requirements...................................................................... 4-2
Calibrating DC Zeros ......................................................................... 4-3
Setup Menu ........................................................................................... 4-4
Setup Menu Softkey .......................................................................... 4-4
Checking Instrument Configuration ................................................... 4-5
System Settings Menu....................................................................... 4-5
Setting the Internal Clock/Calendar................................................... 4-6
Instrument Specification .................................................................... 4-7
Connecting Sources to the Product....................................................... 4-7
Test Leads and Connectors .............................................................. 4-8
Coaxial Inputs................................................................................ 4-8
Dual Binding Inputs ....................................................................... 4-8
Connecting the Guard and Ground Binding Posts ............................ 4-9
Guard Theory ................................................................................ 4-10
Guard Connection ......................................................................... 4-10
External Guard Connection ........................................................... 4-12
Basic Operation..................................................................................... 4-13
Interpreting the Display...................................................................... 4-13
Digital Filter Mode.............................................................................. 4-14
Hi Res Mode...................................................................................... 4-16
Statistics ............................................................................................ 4-17
Current Shunt Function ..................................................................... 4-18
Peak-to-Peak Function ...................................................................... 4-18
Selecting Auto or Locked Range ....................................................... 4-19
Selecting Continuous or External (Single) Trigger ............................ 4-20
Instructions for Voltage Measurements................................................. 4-20
Measurement Mode........................................................................... 4-20
Transfer Mode ................................................................................... 4-21
Establish a Reference ....................................................................... 4-24
View Reference Softkey .................................................................... 4-24
Choose Delta Units............................................................................ 4-24
Instructions for Current Measurements ................................................. 4-25
Current Measurements with the Fluke A40B..................................... 4-25
Overview........................................................................................ 4-25
Connect an A40B .......................................................................... 4-26
Set Up a Fluke A40B Shunt........................................................... 4-27
Measure with a Fluke A40B Shunt ................................................ 4-27
Current Measurements with an A40, A40A, or Custom
Current Shunt .................................................................................... 4-28
Overview........................................................................................ 4-28
Connect an A40/A40A or Custom Shunt to INPUT 1 .................... 4-28
Connect an A40/A40A to the AUX Input........................................ 4-29

Contents (continued)
iii
Set up a Fluke A40/A40A or Custom Current Shunt ..................... 4-30
Measure with a Fluke A40, A40A or Custom Shunt ...................... 4-31
Instructions for Wideband Measurements............................................. 4-31
Techniques for Reducing Transfer Errors ............................................. 4-32
DC Reversal ...................................................................................... 4-32
Loading.............................................................................................. 4-33
Mechanical Contact ........................................................................... 4-33
Thermal EMFs ................................................................................... 4-33
EMI .................................................................................................... 4-34
5 Remote Operation ............................................................................... 5-1
Introduction............................................................................................ 5-1
Using the IEEE-488 Interface for Remote Control................................. 5-1
IEEE-488 Bus Restrictions ................................................................ 5-2
IEEE-488 Bus Setup Procedure ........................................................ 5-2
IEEE-488 Interface Configuration...................................................... 5-3
Bus Communication Overview .......................................................... 5-3
RS-232 Serial Interface ......................................................................... 5-4
RS-232 Interface Specifications ........................................................ 5-4
Set Up and Connect the Serial Interface ........................................... 5-5
Serial Remote Control Setup Procedure ........................................... 5-6
Exceptions for Serial Remote Control ............................................... 5-6
Ethernet Interface.................................................................................. 5-7
Set Up and Connect the Ethernet Interface....................................... 5-7
Set the IP Address............................................................................. 5-8
Select the Dynamic Host Configuration Protocol (DHCP) ................. 5-8
Set a Static Internet Address............................................................. 5-8
Configure the General Network Socket Port ..................................... 5-9
Configure the LAN Default Gateway ................................................. 5-9
Set the LAN Subnet Mask ................................................................. 5-10
Read the MAC Address..................................................................... 5-10
Establish an Ethernet Connection ..................................................... 5-10
Terminate an Ethernet Connection.................................................... 5-11
Use of Ethernet Remote Control ....................................................... 5-11
USB 2.0 Remote Control....................................................................... 5-11
6 Remote Commands............................................................................. 6-1
Introduction............................................................................................ 6-1
Parameter Syntax Rules.................................................................... 6-1
Extra Space or Tab Characters ......................................................... 6-2
Terminators ....................................................................................... 6-2
Incoming Character Processing ........................................................ 6-3
Response Message Syntax............................................................... 6-3
Input Buffer Operation ........................................................................... 6-3
Using Commands.................................................................................. 6-5
Multiple Commands........................................................................... 6-5
Sequential and Overlapped Commands............................................ 6-5
Calibration Security Passcode........................................................... 6-6
Long-Term Commands...................................................................... 6-6
Definition: Queries and Commands................................................... 6-7
Functional Elements of Commands................................................... 6-7
Interface Messages (IEEE-488 Only) ................................................ 6-9
Use of *OPC?, *OPC, and *WAI............................................................ 6-10
Alphabetical List of IEEE-488.2 Common Commands .......................... 6-18

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Operators Manual
iv
Alphabetical List of 5790B Device-Dependent Commands................... 6-24
Local-to-Remote State Transitions........................................................ 6-71
Checking Product Status....................................................................... 6-72
Status Byte Register (STB) ............................................................... 6-75
Service Request Line (SRQ) ......................................................... 6-76
Service Request Enable Register (SRE)....................................... 6-76
Programming the SRE................................................................... 6-76
Event Status Register (ESR) ............................................................. 6-76
Event Status Enable Register (ESE) ............................................. 6-76
Bit Assignments for the ESR and ESE .......................................... 6-77
Read the ESR and ESE ................................................................ 6-77
Load the ESE ................................................................................ 6-77
Instrument Status Register (ISR)....................................................... 6-77
Instrument Status Change Registers............................................. 6-78
Instrument Status Change Enable Registers ................................ 6-78
Bit Assignments for the ISR, ISCR, and ISCE............................... 6-78
Read the ISR, ISCR, or ISCE........................................................ 6-79
Output Queue .................................................................................... 6-79
Error Queue....................................................................................... 6-79
7 Operator Maintenance ........................................................................ 7-1
Introduction............................................................................................ 7-1
Fuse Replacement ................................................................................ 7-1
Clean the Air Filter................................................................................. 7-3
General Cleaning .................................................................................. 7-4
User-Replaceable Parts ........................................................................ 7-5
Calibration ............................................................................................. 7-6
Calibration Reports............................................................................ 7-6
Save Calibration Reports................................................................... 7-6
Appendices
A Error Codes ..................................................................................... A-1
B Calibration Constant Information ..................................................... B-1

v
List of Tables
Table Title Page
1-1. Symbols..................................................................................................... 1-4
2-1. Standard Equipment.................................................................................. 2-2
2-2. Line Power Cord Types Available from Fluke ........................................... 2-4
3-1. Front Panel Features................................................................................. 3-2
3-2. Rear Panel Features ................................................................................. 3-5
4-1. Power-Up State Defaults and Volatility ..................................................... 4-2
4-2. Non-volatile Setup Parameter Factory Defaults ........................................ 4-3
4-3. Input Test Lead Summary ......................................................................... 4-8
4-4. Input Impedance Summary ....................................................................... 4-9
4-5. Measurement Display Amplitude Resolution............................................. 4-16
5-1. Supported IEEE-488 Interface Function Subsets...................................... 5-3
5-2. RS-232 Interface Parameter Choices ....................................................... 5-4
6-1. Units Accepted in Parameters and Used in Responses............................ 6-2
6-2. Response Data Types............................................................................... 6-4
6-3. Functional Elements of Commands .......................................................... 6-8
6-4. Interface Messages Accepted by the Product........................................... 6-9
6-5. Interface Messages Sent by the Product .................................................. 6-10
6-6. Command Summary ................................................................................. 6-11
6-7. Operating State Transitions....................................................................... 6-72
6-8. Status Register Summary ......................................................................... 6-73
6-9. Status Byte and SRE Bit Definitions.......................................................... 6-75
6-10. Bit Assignments for ESR and ESE............................................................ 6-77
6-11. Bit Assignments for the ISR, ISCEs and ISCRs........................................ 6-78
7-1. Replacement Fuses .................................................................................. 7-2
7-2. User-Replaceable Parts ............................................................................ 7-5

5790B
Operators Manual
vi

vii
List of Figures
Figure Title Page
2-1. Line Power Cord Types Available from Fluke ........................................... 2-4
2-2. Line Power Label and Switch Location ..................................................... 2-5
3-1. Front Panel................................................................................................ 3-1
3-2. Rear Panel ................................................................................................ 3-4
4-1. Recommended Test Lead Connections to Test a Voltmeter..................... 4-11
4-2. Recommended Test Lead Connections to Test a Source......................... 4-12
4-3. Measuring Absolute Current Using A40B.................................................. 4-26
4-4. Measuring Relative Current Using 792A-7004.......................................... 4-28
4-5. Measuring Relative Current Using 5790A-7001........................................ 4-29
6-1. Status Register Overview.......................................................................... 6-74
7-1. Accessing the Fuse ................................................................................... 7-2
7-2. Accessing the Air Filter.............................................................................. 7-4

5790B
Operators Manual
viii

1-1
Chapter 1
Introduction and Specifications
Introduction
The 5790B AC Measurement Standard (the Product) is a systems instrument
that measures ac voltage with the uncertainty of a thermal transfer standard.
Product operation is controlled from the front panel or remotely over the serial,
USB, Ethernet, or IEEE-488 interface.
You can operate the Product in measurement mode or transfer mode. In
measurement mode, the Product operates as a digital ac or dc voltmeter with up
to 8 digits of resolution. Measurement mode uses an internal dc reference. In
transfer mode, you apply an external dc or ac reference source. The Product
automatically switches and calculates, and shows the resulting ac-dc or ac-ac
difference on the LCD Color VGA display (the display).
The Product covers a voltage range of 600 μV to 1000 V (60 mV minimum in
transfer mode), and a frequency range of 10 Hz to 1 MHz. A wideband voltage
option extends frequency range to 30 MHz (Option 5790B/3) or 50 MHz (Option
5790B/5 and 5790B/AF). The Product is also compatible with Fluke A40, A40A,
and A40B current shunts, enabling current measurements in both measurement
mode or transfer mode up to 100 A. Refer to the Specifications for details.
A variety of input connections allows you to use the one that best suits your
application. There are four sets of input terminals on the Product, two 50 ΩType
"N" connectors and two sets of five-way binding posts. One 50 ΩType "N" and
one set of binding posts is dedicated to the ac measurement and transfer modes.
ac or dc voltages can be applied to either input connection, allowing you to
perform automated ac-dc transfer measurements. The second Type "N" input
connection supports the optional wideband mode, and the AUX binding posts are
for Fluke A40 Series current shunts.

5790B
Operators Manual
1-2
How to Contact Fluke Calibration
To contact Fluke Calibration, call one of the following telephone numbers:
•Technical Support USA: 1-877-355-3225
•Calibration/Repair USA: 1-877-355-3225
•Canada: 1-800-36-FLUKE (1-800-363-5853)
•Europe: [phone]
•Japan: [phone]
•Singapore: [phone]
•China: [phone]
•Brazil: [phone]
•Anywhere in the world: [phone]
To see product information or download manuals and the latest manual
supplements, visit Fluke Calibration’s website at www.flukecal.com.
To register your product, visit http://flukecal.com/register-product.
Safety Information
A Warning identifies conditions and procedures that are dangerous to the user. A
Caution identifies conditions and procedures that can cause damage to the
Product or the equipment under test.
Warning
To prevent possible electrical shock, fire, or personal injury:
•Read all safety information before you use the Product.
•Carefully read all instructions.
•Use the Product only as specified, or the protection
supplied by the Product can be compromised.
•Turn the Product off and remove the mains power cord.
Stop for two minutes to let the power assemblies discharge
before you open the fuse door.
•Replace a blown fuse with exact replacement only for
continued protection against arc flash.
•Do not apply more than the rated voltage, between the
terminals or between each terminal and earth ground.
•Limit operation to the specified measurement category,
voltage, or amperage ratings.
•Use the correct terminals, function, and range for
measurements.
•Do not touch voltages >30 V ac rms, 42 V ac peak, or 60 V
dc.
•Do not use the Product around explosive gas, vapor, or in
damp or wet environments.
•Do not use the Product if it operates incorrectly.

Introduction and Specifications
Safety Information 1
1-3
•Do not operate the Product with covers removed or the case
open. Hazardous voltage exposure is possible.
•Do not use an extension cord or adapter plug.
•Make sure that the space around the Product meets
minimum requirements.
•Do not use test leads if they are damaged. Examine the test
leads for damaged insulation, exposed metal, or if the wear
indicator shows. Check test lead continuity.
•Use this Product indoors only.
•Do not put the Product where access to the mains power
cord is blocked.
•Do not use a two-conductor mains power cord unless you
install a protective ground wire to the Product ground
terminal before you operate the Product.
•Use only the mains power cord and connector approved for
the voltage and plug configuration in your country and rated
for the Product.
•Make sure that the Product is grounded before use.
•Disconnect the mains power cord before you remove the
Product covers.
•Remove the input signals before you clean the Product.
•Use only specified replacement parts.
•Use only specified replacement fuses.
•Have an approved technician repair the Product.
•Use only cables with correct voltage ratings.
•Connect the common test lead before the live test lead and
remove the live test lead before the common test lead.
•Keep fingers behind the finger guards on the probes.
•Remove all probes, test leads, and accessories that are not
necessary for the measurement.
•Disable the Product if it is damaged.
•Do not use the Product if it is damaged.

5790B
Operators Manual
1-4
Symbols
The symbols shown in Table 1-1 can be found in this manual or on the Product.
Table 1-1. Symbols
Symbol Definition Symbol Definition
WARNING.RISK OF DANGER. WARNING. HAZARDOUS VOLTAGE.
Risk of electric shock.
 Consult user documentation. Conforms to European Union
directives
Certified by CSA Group to North
American safety standards. Conforms to relevant Australian EMC standards
Fuse Conforms to relevant South Korean
EMC Standards.

This product complies with the
WEEE Directive marking
requirements. The affixed label
indicates that you must not discard
this electrical/electronic product in
domestic household waste. Product
Category: With reference to the
equipment types in the WEEE
Directive Annex I, this product is
classed as category 9 "Monitoring
and Control Instrumentation"
product. Do not dispose of this
product as unsorted municipal waste.

Measurement Category II is
applicable to test and measuring
circuits connected directly to
utilization points (socket outlets and
similar points) of the low-voltage
MAINS installation.
Measurement and Transfer Modes
With the Product 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). When in measurement mode, among many other
things, the Product automatically:
1. Compares the heating effect of the incoming signal to that of the Product
internal dc source, through the Fluke rms sensor. This method results in
direct detection of true rms value.
2. Adjusts the internal dc source for a null at the output of the rms sensor, in the
process eliminating many sources of error.
3. Applies correction factors saved at the time of calibration.
4. Presents the results of the ac-dc transfer on the display. The display shows
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.)

Introduction and Specifications
An Overview of the Features 1
1-5
Push the Set Reference softkey to set an incoming signal as a reference,
activating transfer mode. In transfer mode, the Product automatically does the
following:
1. Shows the reference source, the formula the Product is using to compute ac-
dc or ac-ac difference, and the results of the formula.
2. Shows the Average Reference softkey to easily correct for dc reversal error.
You apply both polarities of dc and the Product computes the average of the
absolute values of the applied dc.
3. Continuously shows the results of comparisons of the heating effect of the
incoming signal to that of the stored reference.
4. Applies correction factors saved at time of calibration as necessary.
5. Presents the results of the transfer on the display, accurate to within the
uncertainty of the transfer device. (See the Specifications.)
6. Always shows the measured amplitude and frequency of the input signal on
the display, no matter what other processes are taking place.
An Overview of the Features
See Chapter 3 for detailed descriptions of front panel connectors, controls, and
displays. Features of the Product include:
•Two main input choices: 50 ΩType "N" coaxial or five-way binding posts.
•Make relative or absolute current measurements with a Fluke A40B, A40A, or
A40 Current Shunt. See Instructions for Current Measurement.
•A dedicated AUX input terminal that provides current transfer capability.
•WIDEBAND 50 ΩType "N" coaxial connector for measuring signals up to
30 MHz (requires 5790B/3 Wideband Option) or 50 MHz (requires 5790B/5 or
5790B/AF Wideband Option). The WIDEBAND input presents a 50 Ωload to
the source. Signals accepted are from 700 μV to 7 V over a frequency range
of 10 Hz to 30 MHz (Option 5790B/3) or 50 MHz (Option 5790B/5 or
5790B/AF). Only the lower eight Product voltage ranges are used by the
WIDEBAND input.
•Closed-case periodic calibration in which no physical adjustments are
necessary.
•The ability to print or save calibration reports. For reporting purposes, the
Product maintains in nonvolatile memory a database of the calibration shifts
from the previous calibration as well as from the most recent calibration.
Calibration reports provide a way to develop a performance history of each
Product.

5790B
Operators Manual
1-6
•Real-time clock for date and time stamping reports, recording the time and
date of calibration, and calculating specifications.
•Standard IEEE-488 (GPIB) interface, complying with ANSI/IEEE Standards
488.1-1987 and 488.2-1987.
•EIA Standard RS-232-C serial data interface for remote control of the
Product.
•Universal Serial Bus (USB) 2.0 high-speed interface device port for remote
control of the 5790B.
•Integrated 10/100/1000BASE-T Ethernet port for network connection remote
control of the 5790B.
•Extensive internal software-controlled self testing and diagnostics of analog
and digital functions.
•USB Host port to save calibration reports to a flash drive.
•Visual Connection Management input terminals illuminate to help show
correct cable connection configurations.
•Soft Power - automatic selection of line voltage/frequency.
•Display with touch panel overlay.
Instruction Manuals
This Operators Manual contains operating instructions for the Product. The
Product Manual set provides complete information for the operators and service
or maintenance personnel. The set includes the following manuals:
•5790B Operators Manual, on the Product CD
•5790B Service Manual available on the Fluke Calibration website.
5790B Operators Manual
This 5790B Operators Manual provides complete information for installing the
Product and operating the Product from the front panel and from the remote
interface. The manual also provides a glossary of terms related to ac-dc transfers
as well as other information for the Operators and programmer, such as
specifications, and operating parameter setup procedures.
5790B Service Manual
The 5790B Service Manual explains service, maintenance, verification, and
calibration procedures in full detail.
Service Information
Factory authorized service for the Product is available at selected Fluke
Calibration Service Center. For warranty or after-warranty service, contact the
nearest Technical Service Center for instructions. See How to Contact Fluke
Calibration.
To reship the Product, use the original shipping container. If the original carton is
not available, then a new container can be ordered from Fluke Calibration. See
How to Contact Fluke Calibration if necessary.

Introduction and Specifications
Specifications 1
1-7
Specifications
Specifications are valid after allowing a warm-up period of 30 minutes, or twice
the time the 5790B has been turned off, whichever is less. For example, if the
5790B has been turned off for 5 minutes, the warm-up period is 10 minutes. To
simplify evaluation of how the 5790B covers your workload, use the Absolute
Specification. Those include stability, temperature coefficient, linearity, and
traceability to external standards.
Note
When the 5790B is used within ±5 °C (
± 3 °C in Wideband) of the
temperature of the last calibration, it is not necessary to add
anything to the Absolute Uncertainty Specifications to determine the
ratios between 5790B uncertainties and the uncertainties of a unit
under test. The initial calibration at Fluke Calibration is done at
23 °C. The temperature of the last calibration can be verified at any
time. Push Setup Menu>Calibration to show the last complete
verification date and temperature on the calibration screen.

5790B
Operators Manual
1-8
General Specifications
Warm-up Time ................................................ 30 minutes or twice the time the 5790B has been turned OFF.
Relative Humidity
Operating .................................................... ≤80 % to 30 °C, ≤70 % to 40 °C, ≤40 % to 50 °C
Storage ....................................................... <95 % non-condensing. A power stabilization period of 4 days may be
required after extended storage at high temperature and humidity
Altitude
Operating .................................................... 0 - 2000 meters
Non-Operating ............................................ 0 - 12,200 meters
Temperature
Operating .................................................... 0 °C to 50 °C
Calibration................................................... 15 °C to 35 °C
Storage ....................................................... -40 °C to 70 °C
Electromagnetic Compatibility (EMC)
International ................................................ IEC 61326-1: Controlled Electromagnetic Environment
CISPR 11: Group 1, Class A
Group 1: Equipment has intentionally generated and/or uses
conductively-coupled radio frequency energy that is necessary for
the internal function of the equipment itself.
Class A: Equipment is suitable for use in all establishments other
than domestic and those directly connected to a low-voltage
power supply network that supplies buildings used for domestic
purposes. There may be potential difficulties in ensuring
electromagnetic compatibility in other environments due to
conducted and radiated disturbances.
Emissions that exceed the levels required by CISPR 11 can occur
when the equipment is connected to a test object.
Korea (KCC) ............................................... Class A Equipment (Industrial Broadcasting & Communication
Equipment)
Class A: Equipment meets requirements for industrial
electromagnetic wave equipment and the seller or user should
take notice of it. This equipment is intended for use in business
environments and not to be used in homes.
USA (FCC).................................................. 47 CFR 15 subpart B. This product is considered an exempt device per
clause 15.103.
Surge .............................................................. ANSI C62.41-1980, Category A
Reliability ........................................................ MIL-T-2880D, paragraph 3.13.3
Size
Height ......................................................... 17.8 cm (7 in) standard rackmount + 1.5 cm (0.6 in)
Width........................................................... 43.2 cm (17 in)
Depth .......................................................... 63 cm (24.8 in)
Maximum Power Requirements
5790B ......................................................... 100 VA
Weight
5790B ......................................................... 24 kg (53 lb)
With Wideband ........................................... 24.5 kg (54 lb)
Line Power...................................................... 50 Hz/60 Hz; 100 V - 120 V, 220 V - 240 V
Safety.............................................................. IEC 61010-1: Overvoltage Category II, Pollution Degree 2
IEC 61010-2-030: Measurement 1000 V
Remote Interfaces .......................................... RS-232, IEEE-488, USB, Ethernet
Confidence Level ............................................ 99 % unless otherwise specified.
DC Zero Cal.................................................... Perform the dc zero calibration every 30 days. In addition, perform the
dc zero calibration after powering up the unit the first time after
unpacking following a shipment or if exposed to an environmental
change of greater than 5 °C.

Introduction and Specifications
Resolution and Range Limits 1
1-9
Resolution and Range Limits
Voltage Range Autorange Limits [1] Resolution
Upper Lower Filter Fast Filter Med/Slow
2.2 mV 2.2 mV 600 μV 0.1 μV 0.1 μV
7 mV 7 mV 1.9 mV 0.1 μV 0.1 μV
22 mV 22 mV 6 mV 0.1 μV 0.1 μV
70 mV 70 mV 19 mV 0.1 μV 0.1 μV
220 mV 220 mV 60 mV 0.1 μV 0.1 μV
700 mV 700 mV 190 mV 1.0 μV 0.1 μV
2.2 V 2.2 V 600 mV 1.0 μV 0.1 μV
7 V 7 V 1.9 V 10 μV 1.0 μV
22 V 22 V 6 V 10 μV 1.0 μV
70 V 70 V 19 V 100 μV 10 μV
220 V 220 V 60 V 100 μV 10 μV
700 V 700 V 190 V 1.0 mV 100 μV
1000 V [2] 1050 V 600 V 1.0 mV 100 μV
[1] In locked ranges, readings may be made approximately 1 % beyond the autorange limits.
[2] The 1000 V range Upper Limit is 1050 V, autorange or locked.
Electrical Specifications
The Product specifications describe the Absolute Specification of the Product. The Product specifications include stability,
temperature, and humidity; within specified limits, linearity, line and load regulation, and the reference standard
measurement uncertainty. The Product specifications are provided at a 99 % confidence level, k=2.58, normally
distributed, unless otherwise stated.
The relative specifications are provided for enhanced accuracy applications. To calculate an enhanced absolute
specification from the relative specification, it is necessary to combine the uncertainty of your external standards with the
pertinent relative specifications. Specifications are valid after allowing a warm-up period of 30 minutes, or twice the time
the Product has been turned off.
Absolute AC Voltage
Voltage Range Frequency Range
±5 °C of Calibration Temperature
AC/DC Transfer
Mode ±ppm
2 Years
Measurement Mode ±(ppm of Reading + μV)
90 Days 1 Year 2 Years
2.2 mV
10 Hz - 20 Hz
20 Hz- 40 Hz
40 Hz - 20 kHz
20 kHz - 50 kHz
50 kHz - 100 kHz
100 kHz - 300 kHz
300 kHz - 500 kHz
500 kHz - 1 MHz
1700 + 1.3
740 + 1.3
420 + 1.3
810 + 2.0
1200 + 2.5
2300 + 4.0
2400 + 6.0
3200 + 6.0
1700 + 1.3
740 + 1.3
420 + 1.3
810 + 2.0
1200 + 2.5
2300 + 4.0
2400 + 8.0
3500 + 8.0
1700 + 1.3
740 + 1.3
420 + 1.3
820 + 2.0
1200 + 2.5
2300 + 4.0
2600 + 8.0
5000 + 8.0
7 mV
10 Hz - 20 Hz
20 Hz - 40 Hz
40 Hz - 20 kHz
20 kHz - 50 kHz
50 kHz - 100 kHz
100 kHz - 300 kHz
300 kHz - 500 kHz
500 kHz - 1 MHz
850 + 1.3
370 + 1.3
210 + 1.3
400 + 2.0
600 + 2.5
1200 + 4.0
1300 + 6.0
2000 + 6.0
850 + 1.3
370 + 1.3
210 + 1.3
400 + 2.0
600 + 2.5
1200 + 4.0
1300 + 8.0
2300 + 8.0
850 + 1.3
370 + 1.3
210 + 1.3
410 + 2.0
610 + 2.5
1200 + 4.0
1400 + 8.0
3600 + 8.0
22 mV
10 Hz - 20 Hz
20 Hz - 40 Hz
40 Hz - 20 kHz
20 kHz - 50 kHz
50 kHz - 100 kHz
100 kHz - 300 kHz
300 kHz - 500 kHz
500 kHz - 1 MHz
290 + 1.3
180 + 1.3
110 + 1.3
210 + 2.0
310 + 2.5
810 + 4.0
860 + 6.0
1400 + 6.0
290 + 1.3
190 + 1.3
110 + 1.3
210 + 2.0
310 + 2.5
810 + 4.0
890 + 8.0
1700 + 8.0
290 + 1.3
190 + 1.3
110 + 1.3
210 + 2.0
310 + 2.5
820 + 4.0
1000 + 8.0
2600 + 8.0

5790B
Operators Manual
1-10
Voltage Range Frequency Range
±5 °C of Calibration Temperature
AC/DC Transfer
Mode ±ppm
2 Years
Measurement Mode ±(ppm of Reading + μV)
90 Days 1 Year 2 Years
70 mV
10 Hz - 20 Hz [1]
20 Hz - 40 Hz
40 Hz - 20 kHz
20 kHz - 50 kHz
50 kHz - 100 kHz
100 kHz - 300 kHz
300 kHz - 500 kHz
500 kHz - 1 MHz
240 + 1.5
120 + 1.5
64 + 1.5
120 + 2.0
260 + 2.5
510 + 4.0
660 + 6.0
1100 + 6.0
240 + 1.5
120 + 1.5
65 + 1.5
130 + 2.0
260 + 2.5
510 + 4.0
670 + 8.0
1100 + 8.0
240 + 1.5
130 + 1.5
69 + 1.5
130 + 2.0
260 + 2.5
530 + 4.0
680 + 8.0
1300 + 8.0
220 mV
10 Hz - 20 Hz [1] 210 210 + 1.5 210 + 1.5 210 + 1.5
20 Hz - 40 Hz 82 84 + 1.5 85 + 1.5 87 + 1.5
40 Hz - 20 kHz 34 37 + 1.5 38 + 1.5 43 + 1.5
20 kHz - 50 kHz 67 69 + 2.0 69 + 2.0 73 + 2.0
50 kHz - 100 kHz 160 + 2.5 160 + 2.5 160 + 2.5
100 kHz - 300 kHz 240 + 4.0 250 + 4.0 280 + 4.0
300 kHz - 500 kHz 360 + 6.0 380 + 8.0 400 + 8.0
500 kHz - 1 MHz 940 + 6.0 1000 + 8.0 1200 + 8.0
700 mV
10 Hz - 20 Hz [1] 210 210 + 1.5 210 + 1.5 210 + 1.5
20 Hz - 40 Hz 73 75 + 1.5 76 + 1.5 78 + 1.5
40 Hz - 20 kHz 27 31 + 1.5 33 + 1.5 38 + 1.5
20 kHz - 50 kHz 47 50 + 2.0 51 + 2.0 56 + 2.0
50 kHz - 100 kHz 79 + 2.5 79 + 2.5 84 + 2.5
100 kHz - 300 kHz 160 + 4.0 180 + 4.0 210 + 4.0
300 kHz - 500 kHz 300 + 6.0 300 + 8.0 340 + 8.0
500 kHz - 1 MHz 900 + 6.0 960 + 8.0 1200 + 8.0
2.2 V
10 Hz - 20 Hz [2] 200 200 200 200
20 Hz - 40 Hz 63 65 66 69
40 Hz - 20 kHz 18 22 24 29
20 kHz - 50 kHz 43 45 46 52
50 kHz - 100 kHz 70 71 76
100 kHz - 300 kHz 150 160 200
300 kHz - 500 kHz 250 260 310
500 kHz - 1 MHz 840 900 1200
7 V
10 Hz - 20 Hz [2] 200 200 200 200
20 Hz - 40 Hz 63 66 67 70
40 Hz - 20 kHz 18 22 24 29
20 kHz - 50 kHz 44 46 48 53
50 kHz - 100 kHz 80 81 88
100 kHz - 300 kHz 180 190 220
300 kHz - 500 kHz 380 400 470
500 kHz - 1 MHz 1100 1200 1500
22 V
10 Hz - 20 Hz [2] 200 200 200 200
20 Hz - 40 Hz 63 66 67 70
40 Hz - 20 kHz 21 25 27 31
20 kHz - 50 kHz 44 46 48 53
50 kHz - 100 kHz 80 81 85
100 kHz - 300 kHz 180 190 220
300 kHz - 500 kHz 380 400 470
500 kHz - 1 MHz 1100 1200 1500