SAFETY INSTRUCTIONS 
  7 
Fuse 
 WARNING 
  Fuse type:     
  100V/120V    T0.1A 250V 
  230V    T0.08A 250V 
  Make sure the correct type of  fuse is installed before 
power up. 
  To avoid fire, only replace the fuse with the specified 
type and rating. 
  Disconnect the power cord before fuse replacement. 
  Make sure the cause of  a fuse blowout is fixed before 
fuse replacement. 
Cleaning the 
GDM-8245 
  Disconnect the power cord before cleaning. 
  Use a soft cloth dampened in a solution of  mild 
detergent and water. Do not spray any liquid into the 
GDM-8245. 
  Do not use chemicals or cleaners containing harsh 
material such as benzene, toluene, xylene, and acetone.
Operation 
Environment 
  Location: Indoor, no direct sunlight, dust free, almost 
non-conductive pollution (Note below) 
  Relative Humidity: < 75% 
  Altitude: < 2000m 
  Temperature: 0°C to 50°C (operation) 
(Note) EN 61010-1:2001 specifies the pollution degrees and their 
requirements as follows. The GDM-8245 falls under degree 2. 
Pollution refers to “addition of  foreign matter, solid, liquid, or 
gaseous (ionized gases), that may produce a reduction of  dielectric 
strength or surface resistivity”. 
  Pollution degree 1: No pollution or only dry, non-conductive pollution 
occurs. The pollution has no influence. 
  Pollution degree 2: Normally only non-conductive pollution occurs. 
Occasionally, however, a temporary conductivity caused by 
condensation must be expected. 
  Pollution degree 3: Conductive pollution occurs, or dry, 
non-conductive pollution occurs which becomes conductive due to 
condensation which is expected. In such conditions, equipment is 
normally protected against exposure to direct sunlight, precipitation, 
and full wind pressure, but neither temperature nor humidity is 
controlled. 
Storage 
Environment 
  Location: Indoor 
  Relative Humidity: < 75% (0~35°C),<50% (35~50°C)
*
  Temperature: 40°C to 70°C 
*
Excluding 2M/20M ranges