1
Introduction
The Fluke 8558A 8 1/2 Digit Multimeter and 8588A Reference Multimeter (the Product or Multimeter 
unless otherwise specified) are for demanding and precise measurement applications. The Product 
functions in both stand-alone and systems applications. 8 1/2 digit resolution provides high 
performance and makes the Product well suited for application use in standards labs, calibration labs, 
engineering labs, and systems use. The 8588A includes more features and higher performance for the 
most demanding metrology applications.
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.
General Safety Information is located in the printed Safety Information document that ships with the 
Product. It can also be found online at www.Flukecal.com
. More specific safety information is listed 
where applicable.
Specifications
Safety Specifications are located in Safety Specifications section of the Safety Information document. 
Complete specifications are at www.flukecal.com
. See the 8588A/8558A Product Specifications. 
WWarning
If the Product is operated in any way not specified by this manual or other 
documentation provided by Fluke, the protection provided by the Product may be 
impaired.
Usage Information
Complete Product usage information is located in the 8588A/8558A Operators Manual found online at 
www.Flukecal.com
.