7-2
Plant Growth Chamber
Thermo Scientific
Section 7
Specifications
** 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 sup-
ply 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 1500V for a 120V supply.
*** Pollution degree describes the amount of conductive pollution present in the operating
environment. Pollution degree 2 assumes that normally only non-conductive pollution such
as dust occurs with the exception of occasional conductivity caused by condensation.
**** measured at ambient temperature of 32°C (90°F)
