B&K Precision 1739 - Manual - Manual (Page 11)

9
4 Operating Instructions
Safety Precautions
Use only a polarized 3-wire AC outlet. This assures that the power supply chassis,
case, and ground terminal are connected to a good earth ground and reduces
danger from electrical shock.
There is little danger of electrical shock from the power supply output, which
produces a maximum of 30 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.
Equipment Precautions
Avoid using the power supply in ambient temperatures above +40° C. Always
allow sufficient air space around the heat sink at the rear of the power supply for
effective radiation to prevent internal heat build-up.
Although the power supply is protected against reverse polarity damage, the
circuit being powered may not include such protection. Always carefully observe
polarity; incorrect polarity may damage the equipment under test.
Do not exceed the voltage rating of the circuit being powered. Many transistors
and integrated circuits will not withstand voltage of 30 volts.
There is no need to worry about voltage spikes or overshoot damaging the
equipment under test. The voltage between the output terminals of the power
supply never exceeds the preset value as the POWER switch is turned on or off.