ENDEVCO MODEL 4990A RACK
INSTRUCTION MANUAL
23
7.
SAFETY
The following general safety precautions must be observed during all phases of operation,
service, and repair of this instrument. Failure to comply with these precautions or with specific
warnings elsewhere in this manual violates safety standards of design, manufacture, and
intended use of the instrument. ENDEVCO assumes no liability for the customer’s failure to
comply with these requirements.
7.1
Ground The Instrument
To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical
ground. The instrument is equipped with a three-conductor ac power cable. The power cable
must either be plugged into an approved three-contact electrical outlet or used with a three-
contact to two-contact adapter with the grounding wire (green) firmly connected to an electrical
ground (safety ground) at the power outlet. The power jack and mating plug of the power cable
meet International Electrotechnical Commission (IEC) safety standards.
7.2
Do Not Operate In An Explosive Atmosphere
Do not operate the instrument in the presence of flammable gases or fumes. Operation of any
electrical instrument in such an environment constitutes a safety hazard.
7.3
Keep away from live circuits
Operating personnel must not remove instrument covers. Component replacement and internal
adjustments must be made by qualified maintenance personnel. Do not replace components with
the power cable connected. Under certain conditions, dangerous voltages may exist even with
the power cable removed. To avoid injuries, always disconnect power and discharge circuits
before touching them.
7.4
Do Not Service Or Adjust Alone
Do not attempt internal service or adjustment unless another person, capable of rendering first
aid and resuscitation, is present.
7.5
Do Not Substitute Parts Or Modify Instrument
Because of the danger of introducing additional hazards, do not install substitute parts or perform
any unauthorized modification to the instrument. Return the instrument to ENDEVCO for service
and repair to ensure that safety features are maintained.
7.6
Dangerous Procedure Warnings
Warnings, such as the example below, precede potentially dangerous procedures throughout this
manual. Instructions contained in the warnings must be followed.
