5
DANGER
If it is necessary to replace the power cord or the power plug, the replacement
cord or plug must have the same polarity as the original. Otherwise a safety
hazard from electrical shock might exist that which could result in personal injury
or death.
CAUTION
Your equipment can be destroyed if it is not set to the proper power line voltage!
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This chapter tells you the safety precautions to use when operating the PARSTAT 2273. Please
be sure to read them. It also includes some suggestions on placement of your system
components, and information on possible RF interference and transient sensitivity.
2.1. Power Cord
For safe operation, the PARSTAT 2273 must be electrically connected to earth ground through a
suitable protective conductor. This connection is made via the earth ground prong of the 2273's
power cord plug, therefore, the power cord plug must be inserted into a socket outlet provided
with the required earth ground contact. The protective action must not be defeated by the use of
an extension cord without a protective conductor, by use of an "adapter" that doesn't maintain
earth ground continuity, or by any other means.
Wherever possible, the instrument is furnished with a power cord plug that is compatible with the
type of power socket in use where the instrument will be operated. If you have to provide a power
cord, it should be an approved type with a standard IEC connector at one end for connection to
the 2273.
2.2. Line Voltage and Fusing
2.2.1. Selecting the Line Voltage
Before connecting any system components to the ac mains source, consult the corresponding
hardware manuals and make sure each component is configured for your ac line voltage.
The 2273 has a Corcom™ Power Entry Module on the lower left side of the rear panel. The
Corcom module (Fig. 3) contains the power connector; a small, removable drum for setting the
line voltage; and a line fuse. The removable drum lets you configure the instrument for a nominal
100, 120, 220, or 240 V ac. The module door has a small window that shows the line voltage
setting now in use. To change the ac input voltage:
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