User Manual 9250
Portrayal 2-3
Operating
Environment
The 9250 is intended for operation on the bench or inside a rack of
instruments. It is intended for indoor use only and should be
operated in a clean, dry environment with an ambient temperature
within the range of 0 °C to 50 °C.
WARNING
The 9250 must not be operated in explosive, dusty, or
wet atmospheres. Avoid installation of the module
close to strong magnetic fields.
The design of the 9250 has been verified to conform to EN 61010-1
2
nd
addition safety standard per the following limits: Installation
(Overvoltage) Category I (Measuring terminals) Pollution Degree 2.
Installation (Overvoltage) Category I refers to signal level, which is
applicable for equipment measuring terminals that are connected to
source circuits in which measures are taken to limit transient
voltages to an appropriately low level.
Pollution Degree 2 refers to an operating environment where
normally only dry non-conductive pollution occurs. Occasionally a
temporary conductivity caused by condensation must be expected.
Power
Requirements
The function generator may be operated from a wide range of mains
voltage 90 to 264Vac. Voltage selection is automatic and does not
require switch setting. The instrument operates over the power mains
frequency range of 48 to 63Hz. Always verify that the operating power
mains voltage is the same as that specified on the rear panel.
The 9250 should be operated from a power source with its neutral at
or near ground (earth potential). The instrument is not intended for
operation from two phases of a multi-phase ac system or across the
legs of a single-phase, three-wire ac power system. Crest factor (ratio
of peak voltage to rms.) should be typically within the range of 1.3 to
1.6 at 10% of the nominal rms. mains voltage.
Grounding
Requirements
To ensure the safety of operating personnel, the U.S. O.S.H.A.
(Occupational Safety and Health) requirement and good engineering
practice mandate that the instrument panel and enclosure be “earth”
grounded. Although BNC housings are isolated from the front panel,
the metal part is connected to earth ground.
