Fluke 5790B User manual

October 2016
© 2016 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
Service 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
Title Page
1 Introduction and Specifications......................................................... 1-1
Introduction............................................................................................ 1-1
Contact Fluke Calibration...................................................................... 1-2
Safety Information ................................................................................. 1-2
Symbols................................................................................................. 1-4
Specifications ........................................................................................ 1-4
General Specifications .......................................................................... 1-5
Resolution and Range Limits ................................................................ 1-6
Electrical Specifications......................................................................... 1-6
Absolute AC Voltage ......................................................................... 1-6
Relative AC Voltage .......................................................................... 1-9
Absolute AC Non-sine Voltage.......................................................... 1-11
Absolute DC Voltage ......................................................................... 1-12
Relative DC Voltage .......................................................................... 1-12
Secondary Electrical Specifications....................................................... 1-13
AC Secondary Performance.............................................................. 1-13
DC Secondary Performance.............................................................. 1-15
Operating Characteristics.................................................................. 1-16
AUX Input Characteristics ................................................................. 1-17
Absolute Wideband Specifications (5790B/3, 5790B/5, and 5790B/AF) 1-17
2 Theory of Operation............................................................................ 2-1
Introduction............................................................................................ 2-1
Functional Block Diagram Discussion................................................... 2-2
Digital Section Overview ....................................................................... 2-4
Analog Section Overview ...................................................................... 2-4
System Interconnect Detailed Circuit Description ................................. 2-6
Digital Motherboard Assembly (A4)................................................... 2-6
Transformer Assembly (A22)............................................................. 2-6
Analog Motherboard Assembly (A3).................................................. 2-6
Digital Section Detailed Circuit Description........................................... 2-7
CPU Assembly (A20)......................................................................... 2-7
Front-Panel Assembly (A2) ............................................................... 2-7
Terminal LED Indicator Assembly (A25) ........................................... 2-7
Analog Section Detailed Circuit Description.......................................... 2-7

5790B
Service Manual
ii
Filter Assembly (A18) ........................................................................ 2-7
Regulator/Guard Crossing Assembly (A17) ...................................... 2-7
Transfer Assembly (A10)................................................................... 2-7
A/D Amplifier Assembly (A15) ........................................................... 2-8
DAC Assembly (A16)......................................................................... 2-10
Wideband Module (A6)...................................................................... 2-11
3 Calibration Adjustment and Verification........................................... 3-1
Introduction............................................................................................ 3-1
Calibration Cycle ............................................................................... 3-1
Calibration Reports............................................................................ 3-1
Save Calibration Reports................................................................... 3-2
Calibration Adjustment Security Passcode........................................ 3-2
Full or Range Calibration Adjustment................................................ 3-2
Automating Calibration Adjustment and Verification ......................... 3-3
How Calibration Memory is Organized.............................................. 3-3
Calibration ............................................................................................. 3-4
Calibrating (Calibration Adjustment) the Main Input.......................... 3-4
Characterizing the DC Source........................................................... 3-5
Self-Calibrate a Fluke 752A Divider with a Fluke 8508A as the Null
Detector............................................................................................. 3-5
DC Voltage Source Characterization Values..................................... 3-7
DC Calibration Adjustment ............................................................ 3-12
AC Calibration Adjustment ............................................................ 3-18
Calibrate the Wideband AC Option ................................................... 3-27
Characterizing the AC Source....................................................... 3-29
Calibration Adjustment of Wideband Input Gain at 1 kHz.............. 3-32
Calibration Adjustment of Wideband Input Flatness...................... 3-33
Calibration Adjustment of AF Option ............................................. 3-35
Calibration Verification .......................................................................... 3-37
Verifying the DC Voltage Performance of the Main Input.................. 3-37
Verifying the Main Input (INPUT 1 or 2) ............................................ 3-39
Verifying AC-DC Difference for Regions I and III
(220 mV through 1000 V Range)................................................... 3-45
Verifying Absolute AC Error for Region IV
(70 mV through 700 mV Range).................................................... 3-45
Verifying Absolute AC Error for Region II
(2.2 V through 1000 V Range)....................................................... 3-49
Verifying Absolute AC Error for Region V
(2.2 mV through 22 mV) ................................................................ 3-51
Verifying the Wideband AC Option.................................................... 3-52
Wideband 1-kHz Gain Verification................................................. 3-63
Wideband Gain Verification, 10 Hz to 500 kHz ............................. 3-63
Wideband Flatness Verification..................................................... 3-63
Verification of AF Option................................................................ 3-64
Update Full Verification Date................................................................. 3-65
4 Maintenance......................................................................................... 4-1
Introduction............................................................................................ 4-1
Clean the Exterior.............................................................................. 4-1
Fuse Replacement ............................................................................ 4-2
Clean the Air Filter............................................................................. 4-4
Access Procedures ............................................................................... 4-6
Top and Bottom Covers..................................................................... 4-6

Contents (continued)
iii
Digital Section Cover......................................................................... 4-6
Analog Section Covers...................................................................... 4-6
Rear Panel Removal and Installation ................................................ 4-6
Front Panel Removal and Installation................................................ 4-7
Display Assembly Removal and Installation...................................... 4-7
Keyboard Assembly Removal and Installation .................................. 4-7
Analog Assembly Removal and Installation ...................................... 4-7
A20 CPU Assembly Removal and Installation................................... 4-8
Power Transformer Removal and Installation ................................... 4-8
Fan Removal and Installation............................................................ 4-8
Error Codes........................................................................................... 4-9
5 List of Replacable Parts...................................................................... 5-1
Introduction............................................................................................ 5-1
How to Obtain Parts .............................................................................. 5-1
Appendices
A Glossary of AC-DC Transfer Related Terms................................... A-1
B ASCII and IEEE – 488 Bus Codes .................................................. B-1
C Calibration Constant Information..................................................... C-1

5790B
Service Manual
iv

1-1
Chapter 1
Introduction and Specifications
Introduction
Refer to the 5790B Operators Manual (located on the Fluke Calibration website)
for complete operating instructions,
This manual provides performance test, calibration adjustment, theory of
operation, troubleshooting, and repair procedures necessary to verify and
maintain performance of the 5790B (the Product).
Note
In many of the procedures in this manual, the Product is referred to
as the Unit Under Test (UUT).
The performance tests are based on the published 1-year specifications for the
Product. Fluke Calibration recommends the performance test as an acceptance
test when the Product is first received and later as a procedure to ensure that the
Product meets its published specifications. Fluke Calibration recommends a 1-
year calibration cycle for the Product.
Use calibration adjustments to correct out-of-tolerance parameters so they meet
published specifications. If the Product fails the performance test, it is an
indication that the Product requires calibration adjustment and/or repair. While
calibration adjustment can be accomplished without removal of the covers, repair
requires access to the interior of the Product.
Environmental and warm up conditions required for the performance test and
calibration adjustments are stated at the beginning of each of the respective
sections.
Note
Repairs detailed in this manual are to the Modular-level only. Return
the Product to Fluke Calibration or take the Product to a local Fluke
Calibration Service Center for deeper-level repair.

5790B
Service Manual
1-2
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.
• 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.

Introduction and Specifications
Safety Information 1
1-3
• 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
Service Manual
1-4
Symbols
Table 1-1 lists the symbols used on the instrument and/or in this manual.
Table 1-1. Symbols
Symbol Description
 WARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
 WARNING.RISK OF DANGER.
 Consult user documentation.
 Fuse
 Certified by CSA Group to North American safety standards.
 Conforms to European Union directives.
 Conforms to relevant Australian EMC standards.
 Conforms to relevant South Korean EMC Standards.
 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.

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.
Specifications
Specifications are valid after a warm-up period of 30 minutes, or twice the time
the Product has been turned off, whichever is less. For example, if the Product
has been turned off for 5 minutes, the warm-up period is 10 minutes. To simplify
evaluation of how the Product covers your workload, use the Absolute
Specification. Those include stability, temperature coefficient, linearity, and
traceability to external standards.
Note
When the Product 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 the Product 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.

Introduction and Specifications
General Specifications 1
1-5
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.

5790B
Service Manual
1-6
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

Introduction and Specifications
Electrical Specifications 1
1-7
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
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
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

5790B
Service Manual
1-8
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
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
70 V [3]
10 Hz - 20 Hz [2] 200 200 200 200
20 Hz - 40 Hz 63 67 68 72
40 Hz - 20 kHz 25 30 32 39
20 kHz - 50 kHz 55 56 57 63
50 kHz - 100 kHz 91 94 110
100 kHz - 300 kHz 190 200 220
300 kHz - 500 kHz 400 410 510
500 kHz - 1 MHz 1100 1200 1500
220 V [3]
10 Hz - 20 Hz 200 200 200 200
20 Hz - 40 Hz 63 67 68 72
40 Hz - 20 kHz 23 29 31 38
20 kHz - 50 kHz 63 67 69 77
50 kHz - 100 kHz 96 98 110
100 kHz - 300 kHz 210 210 260
300 kHz - 500 kHz 440 500 700
700 V
10 Hz - 20 Hz [4] 200 200 200 200
20 Hz - 40 Hz 92 96 99 110
40 Hz - 20 kHz 36 39 41 47
20 kHz - 50 kHz 120 130 150
50 kHz - 100 kHz 400 500 850
1000 V
10 Hz - 20 Hz [4] 200 200 200 200
20 Hz - 40 Hz 92 96 99 110
40 Hz - 20 kHz 33 37 38 44
20 kHz - 50 kHz [5] 120 130 150
50 kHz - 100 kHz [5] 400 500 850
[1] For 9.5 to 10 Hz, the specifications is ±(1000 ppm of reading + 1.5 μV)
[2] For 9.5 to 10 Hz, the specifications is ±(1000 ppm of reading)
[3] Inputs >100 kHz and with a V*Hz product >2.2E7 are typical.
[4] Typical specification, as determined by sourcing with the Fluke 5205A Precision Power Amplifier.
[5] Inputs >30 kHz and >750 V are typical, as determined by sourcing with the Fluke 5205A Precision Power Amplifier.
Note: The Product is to be used in controlled environments. For disturbances on the mains power supply of >0.5 Vrms from 10 MHz to
40 MHz, add 5 ppm to the 2.2 V range.

Introduction and Specifications
Electrical Specifications 1
1-9
Relative 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 100 + 1.3 110 + 1.3 110 + 1.3
20 Hz - 40 Hz 54 + 1.3 64 + 1.3 68 + 1.3
40 Hz - 20 kHz 44 + 1.3 57 + 1.3 61 + 1.3
20 kHz - 50 kHz 57 + 2.0 67 + 2.0 110 + 2.0
50 kHz - 100 kHz 79 + 2.5 86 + 2.5 120 + 2.5
100 kHz - 300 kHz 190 + 4.0 230 + 4.0 390 + 4.0
300 kHz - 500 kHz 590 + 6.0 720 + 8.0 1200 + 8.0
500 kHz - 1 MHz 2200 + 6.0 2600 + 8.0 4400 + 8.0
7 mV
10 Hz - 20 Hz 80 + 1.3 83 + 1.3 86 + 1.3
20 Hz - 40 Hz 33 + 1.3 39 + 1.3 45 + 1.3
40 Hz - 20 kHz 29 + 1.3 36 + 1.3 42 + 1.3
20 kHz - 50 kHz 40 + 2.0 44 + 2.0 63 + 2.0
50 kHz - 100 kHz 53 + 2.5 57 + 2.5 72 + 2.5
100 kHz - 300 kHz 110 + 4.0 130 + 4.0 210 + 4.0
300 kHz - 500 kHz 370 + 6.0 450 + 8.0 740 + 8.0
500 kHz - 1 MHz 1600 + 6.0 2000 + 8.0 3400 + 8.0
22 mV
10 Hz - 20 Hz 69 + 1.3 72 + 1.3 75 + 1.3
20 Hz - 40 Hz 34 + 1.3 40 + 1.3 46 + 1.3
40 Hz - 20 kHz 30 + 1.3 36 + 1.3 43 + 1.3
20 kHz - 50 kHz 40 + 2.0 45 + 2.0 64 + 2.0
50 kHz - 100 kHz 53 + 2.5 57 + 2.5 73 + 2.5
100 kHz - 300 kHz 97 + 4.0 110 + 4.0 160 + 4.0
300 kHz - 500 kHz 310 + 6.0 380 + 8.0 610 + 8.0
500 kHz - 1 MHz 1200 + 6.0 1500 + 8.0 2500 + 8.0
70 mV
10 Hz - 20 Hz 60 + 1.5 61 + 1.5 62 + 1.5
20 Hz - 40 Hz 27 + 1.5 30 + 1.5 37 + 1.5
40 Hz - 20 kHz 22 + 1.5 25 + 1.5 34 + 1.5
20 kHz - 50 kHz 34 + 2.0 36 + 2.0 44 + 2.0
50 kHz - 100 kHz 53 + 2.5 54 + 2.5 62 + 2.5
100 kHz - 300 kHz 110 + 4.0 120 + 4.0 170 + 4.0
300 kHz - 500 kHz 270 + 6.0 290 + 8.0 320 + 8.0
500 kHz - 1 MHz 910 + 6.0 970 + 8.0 1200 + 8.0
220 mV
10 Hz - 20 Hz 55 60 + 1.5 61 + 1.5 62 + 1.5
20 Hz - 40 Hz 20 27 + 1.5 29 + 1.5 35 + 1.5
40 Hz - 20 kHz 17 22 + 1.5 24 + 1.5 31 + 1.5
20 kHz - 50 kHz 17 22 + 2.0 24 + 2.0 33 + 2.0
50 kHz - 100 kHz 51 + 2.5 52 + 2.5 59 + 2.5
100 kHz - 300 kHz 100 + 4.0 120 + 4.0 170 + 4.0
300 kHz - 500 kHz 260 + 6.0 290 + 8.0 310 + 8.0
500 kHz - 1 MHz 890 + 6.0 950 + 8.0 1200 + 8.0
700 mV
10 Hz - 20 Hz 55 60 + 1.5 61 + 1.5 62 + 1.5
20 Hz - 40 Hz 20 27 + 1.5 29 + 1.5 34 + 1.5
40 Hz - 20 kHz 15 22 + 1.5 24 + 1.5 31 + 1.5
20 kHz - 50 kHz 15 22 + 2.0 24 + 2.0 33 + 2.0
50 kHz - 100 kHz 51 + 2.5 52 + 2.5 59 + 2.5
100 kHz - 300 kHz 100 + 4.0 120 + 4.0 170 + 4.0
300 kHz - 500 kHz 260 + 6.0 270 + 8.0 310 + 8.0
500 kHz - 1 MHz 890 + 6.0 950 + 8.0 1200 + 8.0

5790B
Service 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
2.2 V
10 Hz - 20 Hz 55 60 61 62
20 Hz - 40 Hz 19 26 28 34
40 Hz - 20 kHz 15 20 22 27
20 kHz - 50 kHz 15 21 23 33
50 kHz - 100 kHz 49 50 57
100 kHz - 300 kHz 92 110 160
300 kHz - 500 kHz 220 230 280
500 kHz - 1 MHz 830 890 1200
7 V
10 Hz - 20 Hz 55 60 61 62
20 Hz - 40 Hz 19 27 29 36
40 Hz - 20 kHz 15 20 22 27
20 kHz - 50 kHz 18 23 26 35
50 kHz - 100 kHz 62 64 73
100 kHz - 300 kHz 140 150 180
300 kHz - 500 kHz 360 380 450
500 kHz - 1 MHz 1100 1200 1500
22 V
10 Hz - 20 Hz 55 60 61 62
20 Hz - 40 Hz 19 28 30 37
40 Hz - 20 kHz 15 20 22 27
20 kHz - 50 kHz 18 23 26 35
50 kHz - 100 kHz 62 64 69
100 kHz - 300 kHz 140 150 180
300 kHz - 500 kHz 360 380 450
500 kHz - 1 MHz 1100 1200 1500
70 V [1]
10 Hz - 20 Hz 55 60 62 63
20 Hz - 40 Hz 19 29 31 39
40 Hz - 20 kHz 15 23 25 34
20 kHz - 50 kHz 22 25 27 39
50 kHz - 100 kHz 64 68 85
100 kHz - 300 kHz 140 150 180
300 kHz - 500 kHz 370 390 490
500 kHz - 1 MHz 1100 1200 1500
220 V [1]
10 Hz - 20 Hz 55 61 62 64
20 Hz - 40 Hz 19 30 32 40
40 Hz - 20 kHz 15 23 25 34
20 kHz - 50 kHz 24 30 34 49
50 kHz - 100 kHz 66 69 83
100 kHz - 300 kHz 160 170 220
300 kHz - 500 kHz 410 480 680
700 V
10 Hz - 20 Hz [2] 55 62 63 65
20 Hz - 40 Hz 19 31 33 41
40 Hz - 20 kHz 19 24 25 31
20 kHz - 50 kHz 100 110 140
50 kHz - 100 kHz 390 500 850
1000 V
10 Hz - 20 Hz [2] 55 62 63 65
20 Hz - 40 Hz 19 31 33 41
40 Hz - 20 kHz 19 24 25 31
20 kHz - 50 kHz [3] 100 110 140
50 kHz - 100 kHz [3] 390 500 850
[1] Inputs >100 kHz and with a V*Hz product >2.2E7 are typical.
[2] Typical specification, as determined by sourcing with the Fluke 5205A Precision Power Amplifier.
[3] Inputs >30 kHz and >750 V are typical, as determined by sourcing with the Fluke 5205A Precision Power Amplifier.

Introduction and Specifications
Electrical Specifications 1
1-11
Absolute AC Non-sine Voltage
Range [1] Frequency Range 1-Year, tcal ±5 °C,
±(% of reading + µV)
2.2 mV
10 Hz - 45 Hz 0.1 + 1.3
45 Hz - 1 kHz 0.1+ 1.3
1 kHz - 20 kHz 0.17+ 1.3
20 kHz - 100 kHz 0.5 + 2.5
7 mV
10 kHz - 45 Hz 0.1 + 1.3
45 Hz - 1 kHz 0.1 + 1.3
1 kHz - 20 kHz 0.17 + 1.3
20 kHz - 100 kHz 0.5 + 2.5
22 mV
10 Hz - 45 Hz 0.1 + 1.3
45 Hz - 1 kHz 0.1 + 1.3
1 kHz - 20 kHz 0.17+ 1.3
20 kHz - 100 kHz 0.5 + 2.5
70 mV
10 Hz - 45 Hz 0.1 + 1.5
45 kHz - 1 kHz 0.1 + 1.5
1 kHz - 20 kHz 0.17 + 1.5
20 kHz - 100 kHz 0.5 + 2.5
220 mV
10 Hz - 45 Hz 0.1 + 1.5
45 Hz - 1 kHz 0.1 + 1.5
1 kHz - 20 kHz 0.17 + 1.5
20 kHz - 100 kHz 0.5 + 2.5
700 mV
10 Hz - 45 Hz 0.1 + 1.5
45 Hz - 1 kHz 0.1 + 1.5
1 kHz - 20 kHz 0.17 + 1.5
20 kHz - 100 kHz 0.5 + 2.5
2.2 V [2]
10 Hz - 45 Hz 0.1
45 Hz - 1 kHz 0.1
1 kHz - 20 kHz 0.17
20 kHz - 100 kHz 0.5
7 V
10 Hz - 45 Hz 0.1
45 Hz - 1 kHz 0.1
1 kHz - 20 kHz 0.17
20 kHz - 100 kHz 0.5
22 V [2]
10 Hz - 45 Hz 0.1
45 Hz - 1 kHz 0.1
1 kHz - 20 kHz 0.17
20 kHz - 100 kHz 0.5
70 V
10 Hz - 45 Hz 0.1
45 Hz - 1 kHz 0.1
1 kHz - 20 kHz 0.17
20 kHz - 100 kHz 0.5
[1] Specifications apply for non-sinusoidal inputs with crest factor <3.0 and with harmonic content band-limited to <1 MHz.
[2] Crest factor limited to <2.3 for signals greater than 75 % of full scale RMS.

5790B
Service Manual
1-12
Absolute DC Voltage
Voltage Range
± 5 °C of Calibration Temperature
Measurement Mode ± (ppm of Reading + μV)
90 Days 1 Year 2 Years
220 mV 37 + 1.5 38 + 1.5 43 + 1.5
700 mV 31 + 1.5 33 + 1.5 38 + 1.5
2.2 V 22 24 29
7 V 22 24 29
22 V 25 27 31
70 V 30 32 39
220 V 29 31 38
700 V 39 41 47
1000 V 37 38 44
Note: DC specification valid only when dc input signal is averaged with an equal and opposite dc input signal to eliminate dc offset
errors. The use of Input 1 for dc inputs is not recommended due to the inherent thermal EMFs in a “N” connector. See Operators
Manual for details.
Relative DC Voltage
Voltage Range
± 5 °C of Calibration Temperature
Measurement Mode ± (ppm of Reading + μV)
90 Days 1 Year 2 Years
220 mV 22 + 1.5 24 + 1.5 31 + 1.5
700 mV 22 + 1.5 24 + 1.5 31 + 1.5
2.2 V 20 22 27
7 V 20 22 27
22 V 20 22 27
70 V 23 25 34
220 V 23 25 34
700 V 24 25 31
1000 V 24 25 31
Note: DC specification valid only when dc input signal is averaged with an equal and opposite dc input signal to eliminate dc offset
errors. The use of Input 1 for dc inputs is not recommended due to the inherent thermal EMFs in a “N” connector. See Operators
Manual for details.

Introduction and Specifications
Secondary Electrical Specifications 1
1-13
Secondary Electrical Specifications
Secondary performance specifications and operating characteristics are included in uncertainty specifications.
They are provided for special calibration requirements such as stability or linearity tests.
AC Secondary Performance
Voltage
Range Frequency Range
24 Hour AC
Stability ± 1 °C
Slow Filter Peak-
Peak ± μV
Temperature Coefficient [1]
Input
Resistance [2]
10 °C to 40 °C 0 °C to 10 °C
40 °C to 50 °C
ppm / °C
2.2 mV
10 Hz - 20 Hz 0.4 50 50
20 Hz - 40 Hz 0.4 50 50
40 Hz - 20 kHz 0.4 50 50
20 kHz - 50 kHz 0.4 50 50 10 MΩ
50 kHz - 100 kHz 0.8 75 75
100 kHz - 300 kHz 1.5 100 100
300 kHz - 500 kHz 3.0 150 150
500 kHz - 1 MHz 4.5 200 200
7 mV
10 Hz - 20 Hz 0.4 15 15
20 Hz - 40 Hz 0.4 15 15
40 Hz - 20 kHz 0.4 15 15
20 kHz - 50 kHz 0.4 15 15 10 MΩ
50 kHz - 100 kHz 0.8 25 25
100 kHz - 300 kHz 1.5 60 60
300 kHz - 500 kHz 3.0 80 80
500 kHz - 1 MHz 4.5 125 125
22 mV
10 Hz - 20 Hz 0.4 5 5
20 Hz - 40 Hz 0.4 5 5
40 Hz - 20 kHz 0.4 5 5
20 kHz - 50 kHz 0.4 5 5 10 MΩ
50 kHz - 100 kHz 0.8 8 8
100 kHz - 300 kHz 1.5 10 10
300 kHz - 500 kHz 3.0 40 40
500 kHz - 1 MHz 4.5 100 100
± (ppm of Reading)
70 mV
10 Hz - 20 Hz 18 5 5
20 Hz - 40 Hz 18 5 5
40 Hz - 20 kHz 18 5 5
20 kHz - 50 kHz 18 5 5 10 MΩ
50 kHz - 100 kHz 24 8 8
100 kHz - 300 kHz 24 10 10
300 kHz - 500 kHz 48 30 30
500 kHz - 1 MHz 150 75 75
220 mV
10 Hz - 20 Hz 12 1.5 3.0
20 Hz - 40 Hz 8 1.5 3.0
40 Hz - 20 kHz 8 1.5 3.0 10 MΩ
20 kHz - 50 kHz 8 2.0 3.0
50 kHz - 100 kHz 18 5.0 8.0
100 kHz - 300 kHz 24 10.0 10.0
300 kHz - 500 kHz 36 20.0 20.0
500 kHz - 1 MHz 120 50.0 50.0

5790B
Service Manual
1-14
Voltage
Range Frequency Range
24 Hour AC
Stability ± 1 °C
Slow Filter Peak-
Peak ± μV
Temperature Coefficient [1]
Input
Resistance [2]
10 °C to 40 °C 0 °C to 10 °C
40 °C to 50 °C
ppm / °C
700 mV
10 Hz - 20 Hz 8 1.5 3.0
20 Hz - 40 Hz 6 1.5 3.0
40 Hz - 20 kHz 6 1.5 3.0 10 MΩ
20 kHz - 50 kHz 6 2.0 3.0
50 kHz - 100 kHz 12 5.0 8.0
100 kHz - 300 kHz 18 10.0 10.0
300 kHz - 500 kHz 36 20.0 20.0
500 kHz - 1 MHz 96 50.0 50.0
2.2 V
10 Hz - 20 Hz 8 1.5 3.0
20 Hz - 40 Hz 5 1.5 3.0
40 Hz - 20 kHz 5 1.5 3.0
20 kHz - 50 kHz 5 2.0 3.0 10 MΩ
50 kHz - 100 kHz 10 5.0 8.0
100 kHz - 300 kHz 18 10.0 10.0
300 kHz - 500 kHz 30 20.0 20.0
500 kHz - 1 MHz 90 50.0 50.0
7 V
10 Hz - 20 Hz 8 1.5 3.0
20 Hz - 40 Hz 5 1.5 3.0
40 Hz - 20 kHz 5 1.5 3.0
20 kHz - 50 kHz 5 2.0 3.0 50 kΩ
50 kHz - 100 kHz 10 5.0 8.0
100 kHz - 300 kHz 18 15.0 15.0
300 kHz - 500 kHz 30 30.0 30.0
500 kHz - 1 MHz 90 65.0 65.0
22 V
10 Hz - 20 Hz 8 1.5 3.0
20 Hz - 40 Hz 5 1.5 3.0
40 Hz - 20 kHz 5 1.5 3.0
20 kHz - 50 kHz 5 2.0 3.0 50 kΩ
50 kHz - 100 kHz 10 5.0 8.0
100 kHz - 300 kHz 18 15.0 15.0
300 kHz - 500 kHz 30 30.0 30.0
500 kHz - 1 MHz 90 65.0 65.0
70 V [3]
10 Hz - 20 Hz 8 1.5 3.0
20 Hz - 40 Hz 5 1.5 3.0
40 Hz - 20 kHz 5 1.5 3.0
20 kHz - 50 kHz 5 2.0 3.0 50 kΩ
50 kHz - 100 kHz 18 5.0 8.0
100 kHz - 300 kHz 36 15.0 15.0
300 kHz - 500 kHz 48 40.0 40.0
500 kHz - 1 MHz 120 75.0 75.0