safety issues. When the modules are in use
and operation within the specified full tem-
perature range is not maintained, module
surface temperatures may exceed safe hand-
ling conditions which can cause discomfort
or burns if touched. In the event of a module
exceeding the full temperature range,
always allow the module to cool before
touching or removing modules from chassis.
Keysight products are designed for use with
electrical signals that are rated Meas-
urement Category I and Measurement Cat-
egory II, as described in the International
Electrotechnical Commission (IEC) Standard
IEC 60664. Most measurement, control,
and data I/O signals are Measurement Cat-
egory I and must not be directly connected
to mains voltage or to voltage sources with
high transient over-voltages. Measurement
Category II connections require protection
for high transient over-voltages often asso-
ciated with local AC mains connections.
Assume all measurement, control, and data
I/O connections are for connection to Cat-
egory I sources unless otherwise marked or
described in the user documentation.
Exercise extreme caution when a shock hazard
is present. Lethal voltage may be present on
cable connector jacks or test fixtures. The
American National Standards Institute (ANSI)
states that a shock hazard exists when voltage
levels greater than 30V RMS, 42.4V peak, or
60VDC are present. A good safety practice is to
expect that hazardous voltage is present in any
unknown circuit before measuring.
Operators of this product must be protected
from electric shock at all times. The respons-
ible body must ensure that operators are pre-
vented access and/or insulated from every
connection point. In some cases, connections
must be exposed to potential human contact.
Product operators in these circumstances
must be trained to protect themselves from
the risk of electric shock. If the circuit is cap-
able of operating at or above 1000V, no con-
ductive part of the circuit may be exposed.
Do not connect switching cards directly to
unlimited power circuits. They are intended to
be used with impedance-limited sources.
NEVER connect switching cards directly to AC
mains. When connecting sources to switching
cards, install protective devices to limit fault
current and voltage to the card.
Before operating an instrument, ensure that
the line cord is connected to a properly-groun-
ded power receptacle. Inspect the connecting
cables, test leads, and jumpers for possible
wear, cracks, or breaks before each use.
When installing equipment where access to
the main power cord is restricted, such as rack
mounting, a separate main input power dis-
connect device must be provided in close prox-
imity to the equipment and within easy reach
of the operator.
For maximum safety, do not touch the
product, test cables, or any other instruments
while power is applied to the circuit under
test. ALWAYS remove power from the entire
test system and discharge any capacitors
before: connecting or disconnecting cables or
jumpers, installing or removing switching
cards, or making internal changes, such as
installing or removing jumpers.
Do not touch any object that could provide a
current path to the common side of the circuit
under test or power line (earth) ground.
Always make measurements with dry hands
while standing on a dry, insulated surface cap-
able of withstanding the voltage being meas-
ured.
The instrument and accessories must be used
in accordance with its specifications and oper-
ating instructions, or the safety of the equip-
ment may be impaired.
Do not exceed the maximum signal levels of
the instruments and accessories, as defined in
the specifications and operating information,
and as shown on the instrument or test fixture
panels, or switching card.
When fuses are used in a product, replace with
the same type and rating for continued pro-
tection against fire hazard.
Chassis connections must only be used as
shield connections for measuring circuits, NOT
as safety earth ground connections.
If you are using a test fixture, keep the lid
closed while power is applied to the device
under test. Safe operation requires the use of a
lid interlock.
A
CAUTION
notice denotes a hazard. It calls
attention to an operating procedure, practice,
or the like that, if not correctly performed or
adhered to, could result in damage to the
product or loss of important data. Do not pro-
ceed beyond a
CAUTION
notice until the indic-
ated conditions are fully understood and met.
A WARNING notice denotes a hazard. It
calls attention to an operating procedure,
practice, or the like that, if not correctly per-
formed or adhered to, could result in per-
sonal injury or death. Do not proceed beyond
a WARNING notice until the indicated con-
ditions are fully understood and met.
Instrumentation and accessories shall not be
connected to humans.
Before performing any maintenance, dis-
connect the line cord and all test cables.
To maintain protection from electric shock and
fire, replacement components in mains circuits
– including the power transformer, test leads,
and input jacks – must be purchased from Key-
sight. Standard fuses with applicable national
safety approvals may be used if the rating and
type are the same. Other components that are
not safety-related may be purchased from
other suppliers as long as they are equivalent
to the original component (note that selected
parts should be purchased only through Key-
sight to maintain accuracy and functionality of
the product). If you are unsure about the
applicability of a replacement component, call
an Keysight office for information.
No operator serviceable parts inside. Refer
servicing to qualified personnel. To prevent
electrical shock do not remove covers. For
continued protection against fire hazard,
replace fuse with same type and rating.
PRODUCT MARKINGS:
The CE mark is a registered trademark of the
European Community.
Australian Communication and Media Author-
ity mark to indicate regulatory compliance as a
registered supplier.
