BK Precision 1715A, Instruction Manual

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OPERATING INSTRUCTIONS
SAFETY PRECAUTIONS
Use only a polarized 3-wire ac outlet. This assures that the power
supply chassis, case, and ground tenninal are connected to a good earth
ground and reduces danger from electrical shock.
� There is some danger of electrical shock from the power supply
•
output, which produces a maximum of 60 volts de.
However, there may
be great danger of electrical shock if the power supply output is
connected to an external Wgh 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.
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Do not exceed the voltage rating of the circuit being powered. Many
transistors and integrated circuits will not withstand voltage of 60 volts.
There is no need to worry about voltage spikes or overshoot damaging
the equipment under test. The voltage between the output tenninals of
the power supply never exceeds the preset value as the
POWER
switch
is turned on or off.
HOOK-UP
1. Turn off the power supply and the equipment to be powered during
hook-up.
2. Connect the positive polarity of the device being powered to the red
( +) tenninal of the power supply.
3. Connect the negative polarity of the device being powered to the
black(-) terminal of the power supply.
4. Fig. 3 illustrates the grounding possibilities.
a. If the negative polarity of the equipment or circuit being powered
is also the chassis or common, it may be grounded to earth by
strapping the black ( -) terminal to the green (-+) tenninal as
shown in Fig. 3A.
b. Similarly, the positive polarity can be grounded by strapping the
red(+) terminal to the green(-+) tenninal as shown in Fig. 3B.
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