User Manual
iii 
Do not operate in an explosive or flammable atmosphere  
Do not operate the instrument in the presence of flammable gases or vapors, fumes, or finely-
divided particulates. 
The instrument is designed to be used in office-type indoor environments. Do not operate the 
instrument 
  In the presence of noxious, corrosive, or flammable fumes, gases, vapors, chemicals, or 
finely-divided particulates. 
  In relative humidity conditions outside the instrument's specifications. 
  In environments where there is a danger of any liquid being spilled on the instrument or 
where any liquid can condense on the instrument. 
  In air temperatures exceeding the specified operating temperatures. 
  In atmospheric pressures outside the specified altitude limits or where the surrounding 
gas is not air. 
  In environments with restricted cooling air flow, even if the air temperatures are within 
specifications. 
  In direct sunlight. 
This instrument is intended to be used in an indoor pollution degree 2 environment. The 
operating temperature range is 0 °C to 40 °C and the operating humidity range is ≤ 95% relative 
humidity with no condensation allowed. 
Measurements made by this instrument may be outside specifications if the instrument is used 
in non-office-type environments. Such environments may include rapid temperature or 
humidity changes, sunlight, vibration and/or mechanical shocks, acoustic noise, electrical noise, 
strong electric fields, or strong magnetic fields. 
Do not operate instrument if damaged 
If the instrument is damaged, appears to be damaged, or if any liquid, 
chemical, or other material gets on or inside the instrument, remove the instrument's power 










