Page 36 of 36 Introduction
1.5.2 Instrument Cleaning
The Guardian 2500 is designed to operate with minimum maintenance requirements. The
instrument is recommended for use in a clean dust free environment and requires positioning to
allow for ample circulation of air (at least 3 inches) to the rear and side vents. No internal
cleaning is normally required as long as the instrument remains in its original configuration. All
external surfaces of the instrument can be cleaned with a soft cloth moistened with “Windex” or
other mild general purpose cleaner.
1.5.3 Power Requirements
The Guardian 2500 can be operated from a power source between 100 and 240Vac at a
power line frequency of 50 to 60Hz, no line voltage switching is necessary. Power connection to
the rear panel is through an ac inlet module comprised of an ac connector and fuse drawer.
Before connecting the 3-wire power cord between the unit and AC power the fuses should be in
accordance with the power source, T5.0A, 250V, 5x20mm (QuadTech PN 520068) for 115 or
220V source. Always use an outlet which has a properly connected protection ground. The
instrument is factory shipped with the 5.0A fuse in place. The instrument can be damaged
if the wrong fuse is installed. To change the fuse refer to paragraph 1.5.4.
1.5.4 Safety Inspection
Before operating the instrument, inspect the power inlet module or the rear panel to
ensure that the properly rated fuse is in place, otherwise damage to the unit is possible. Refer
to paragraph 1.5.2.
The instrument is shipped with a standard U.S. power cord, QuadTech P/N 4200-0300 (with
Belden SPH-386 socket or equivalent, and 3-wire plug conforming to IEC 320). Make sure the
instrument is only used with these cables (or other approved international cord set) which
ensures that the instrument is provided with connection to protective earth ground.
The surrounding environment should be free from excessive dust to prevent contamination of
electronic circuits. The surrounding environment should also be free from excessive vibration.
The instrument should be positioned with consideration for ample air flow to the rear panel fan
ventilation holes, an open space of at least 3 inches (75mm) is recommended behind the rear
panel. Do not expose the instrument to direct sunlight, extreme temperature or humidity
variations, or corrosive chemicals.
When the 2500 is used in a rack installation (using the QuadTech 2000-16 Rack Mount Flanges)
make sure the unit is secured using rack cabinet mounting rails, and not secured solely by
these front panel flanges.
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