B&K Precision 1686A - Manual - Manual (Page 9)

9
OPERATING INSTRUCTIONS
SAFETY PRECAUTIONS
WARNING
The following precautions must be observed to
help prevent electric shock.
1. Use only a polarized 3-wire ac outlet. This assures that the
power supply chassis and case are connected to a good earth
g r o u n d a n d reduces danger from electrical shock.
2. There is little danger of electric shock from the power supply
output, which produces a maximum of 14.0 volts dc.
However, there may be great danger of electrical shock if the
power supply output is connected to an external high
voltage. Some equipment being powered may contain high
voltage and present a shock hazard. Observe caution. If the
power supply output is floated (referenced to a voltage rather
than earth ground) turn off the power supply and the
equipment under test when making connections. Never float
the power supply to a potential greater than 100 volts peak
with respect to earth ground.
3. Observe all TEST INSTRUMENT SAFETY precautions
listed in the front of this manual.
EQUIPMENT PROTECTION PRECAUTIONS
CAUTION
The following precautions will help avoid
damage to the power supply.
1. Avoid using the power supply in ambient temperatures
above +40°C (104°F). Always allow sufficient air space
around the fan opening at the rear of the power supply and
the top and side vent openings for effective air flow to
prevent internal heat build-up. Typically, a two inch space
at the sides, as well as a six inch space at the top and rear
of the power supply is adequate. DO NOT block the fan
opening at the rear of the power supply or the vent on top
of the power supply. DO NOT place objects on top of the
power supply.
2. Although the power supply is protected against overload
and short circuits, avoiding these conditions in regular use
results in maximum stability and reliability.
3. Make certain that hook-up is as intended before turning
power supply on. Incorrect polarity may damage the
equipment being powered.
POWER SUPPLY HOOK-UP and OPERATION
1. Turn off the power supply and equipment being powered.