This standard deals with recommended methods and standardized reporting practices for electrical characterization of carbon nanotubes (CNTs). Due to the nature of CNTs, significant measurement errors can occur if the design of the configuration is not performed accordingly. The most common sources of measurement error are described, particularly with regards to high-impedance electrical measurements which are normally required for CNTs. It describes methods which can be used to determine and minimize measurement artifacts; furthermore other error sources during measurements at CNTs are described. Standard reporting practices are included in order to minimize errors in analyzing reported data. The responsible Committee is K 141 "Nanotechnologie" ("Nanotechnology") of the DKE (German Commission for Electrical, Electronic and Informational Technologies) at DIN and VDE.