HP 5501B Operating And Service Manual page 4

GENERAL
The product and related documentation must be reviewed for
familiarization with safety markings and instructions before
operation.
This product is a Safety Class I instrument (provided with a
protective earth terminal).
BEFORE APPLYING POWER
Verify that the product is set to match the available line voltage
and the correct fuse is installed. Refer to
SAFETY EARTH GROUND
An uninterruptible safety earth ground must be provided from
the main power source to the product input wiring terminals,
power cord, or supplied power cord set.
SAFETY SYMBOLS
Instruction manual symbol: the product
will be marked with this symbol when it
is necessary for the user to refer to the
instruction manual.
Indicates hazardous voltages.
Indicates earth (ground) terminal.
The WARNING sign denotes a hazard. It
calls attention to a procedure, practice,
or the like, which, if not correctly
performed or adhered to, could result in
personal injury. Do not proceed beyond
a WARNING sign until the indicated
conditions are fully understood and met.
LASER RADIATION IS EMITTED FROM THE APERTURE ON THE 5501B LASER HEAD AS
ILLUSTRATED ON THE FOLLOWING PAGE. DO NOT STARE INTO BEAM. THIS PRODUCT IS A
CLASS II LASER PRODUCT CONFORMING TO U.S. NATIONAL CENTER FOR DEVICES AND
RADIOLOGICAL HEALTH REGULATIONS 21 CFR 1040.10 AND 1040.11. THE MAXIMUM RADIANT
POWER OUTPUT IS 1 MILLIWATT, THE PULSE SPECIFICATION IS CONTINUOUS WAVE, THE
LASER MEDIUM IS HELIUM-NEON, AND THE WAVELENGTH IS 632.991 NANOMETRES.
LASER RADIATION IS ACCESSIBLE WHEN THE 5501B COVERS ARE REMOVED AND THE TEST-
NORM SWITCH, A1S2, IS IN THE TEST POSITION.
USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN
THOSE SPECIFIED
ii
ELECTRICAL SAFETY CONSIDERATIONS
Section 2, Installation.
LASER HEAD SAFETY CONSIDERATIONS
HEREIN MAY RESULT
The
hazard. It calls attention to an
operating procedure, practice, or the
like, which, if not correctly performed
or adhered to, could result in
damage to or destruction of part or
the entire product. Do not continue
beyond a CAUTION sign until the
indicated
understood and met.
Any interruption of the protective (grounding) conductor (inside
or outside the instrument) or disconnecting the protective earth
terminal will cause a potential shock hazard that could result in
personal Injury. (Grounding one conductor of a two conductor
outlet is not sufficient protection).
Whenever it is likely that the protection has been impaired, the
instrument must be made inoperative and be secured against
any unintended operation.
If this instrument is to be energized via an autotransformer (for
voltage reduction) you must make sure the common terminal is
connected to the neutral (earthed pole) of the power source.
Servicing instructions are for use by service-trained personnel
only. To avoid dangerous electric shock, do not perform any
servicing unless qualified to do so.
Adjustments described in the manual are performed with power
supplied to the instrument while protective covers are removed.
Energy available at many points may, if contacted, result in
personal injury.
Capacitors inside the instrument may still be charged even if the
instrument has been disconnected from its source of supply.
For continued protection against the fire hazard, replace the line
fuse(s) only with 125V fuse(s) of the same current rating and
type (for example, normal blow, time delay, etc.). Do not use
repaired fuses or short circuited fuse holders.
From 1.2 kilovolts to 12 kilovolts dc is present on the anode of
the laser tube in the 5501B. Exercise extreme caution when
working inside the instrument. The high voltage could cause
serious personal injury if contacted. Any adjustments performed
should be by service trained personnel only.
IN HAZARDOUS
CAUTION sign denotes
conditions are fully
RADIATION EXPOSURE.
a