Installation Category: 2.0
Installation category (overvoltage category) defines the level of transient overvoltage, which the instrument is
designed to withstand safely. It depends on the nature of the electricity supply and its overvoltage protection
means. For example, in CAT II, which is the category used for instruments in installations supplied from a supply
comparable to public mains such as hospital and research laboratories and most industrial laboratories, the
expected transient overvoltage is 2500 V for a 230 V supply and 1500 V for a 120 V supply.