Table of Contents
Advertisement
Earth and chassis ground
terminal.
Positive polarity Output ter-
9 + terminal
minal.
Negative polarity output
10 - terminal
terminal.
Indicates power supply out-
11 voltmeter
put voltage.
RANGE
12
METER
switch
0-5OV position
Selects full scale range of
50 volts for voltmeter 11
Selects full scale range of
0-25V position
25 volts for voltmeter
Turn off the power supply before plugging it
1.
into an ac outlet. Turn off by rotating the LEVEL
13 fully counterclockwise until it
control
"clicks" off.
Connect the power cord to a 105-125 volt 60 Hz
2.
ac outlet.
WARNING
Use only a polarized 3-wire outlet. This
assures that the power supply chassis is
connected to a good earth ground and pre-
vents danger from electrical shock. If a
2-wire to 3-wire adapter must be used, be
sure the ground wire of the adapter is
attached to a good earth ground.
3.
Turn on the power supply by rotating the
LEVEL control 13 slightly clockwise past the
"click". The POWER indicator 6 will light.
4.
Determine the maximum safe load current for
the device to be powered and set the current
limit for that value as follows:
Set the coarse current limit with the CUR-
a.
RENT RANGE switch 2
select a range that provides the desired cur-
rent liiit at a value above 20% of the full
scale reading.
b.
Push and hold the set/reset button 4 while
making fine current limit adjustment with
the SET CURRENT LIMIT control 3 for the
desired current limit as read on the current
meter
1 .
C.
Release the set/reset button 4 .
d.
If the maximum safe load current is un-
known, start with a low current lit setting.
If the setting is too low, the overload circuit
will merely trip when power is applied to
the load in steps 7 and 8. If so, increase the
current limit setting in small steps until the
overload circuit does not trip during normal
operation.
13 LEVEL control
11
OPERATING INSTRUCTIONS
When possible,
.
and prevents LEVEL control
voltage above approximately
25 volts.
Turns off power supply at
extreme counterclockwise ro-
tation. Clockwise rotation
turns on power supply and
adjusts output voltage (volt-
age output level is not
changed by the METER
RANGE switch 12 ). Also,
prevents METER RANGE
switch from being set to O-25
V position when LEVEL con-
trol is advanced beyond ap-
proximately 25 volt output.
Set the "STBY-DC ON' switch 7 to the STBY
5.
position while connecting the test leads.
Connect the power supply output to the device
6.
being powered with test leads as follows:
a.
Connect the positive polarity input of the
device being powered to the (+) terminal
9 of the power supply.
Connect the negative polarity input of the
b.
device being powered to the (-) terminal
10 of the power supply.
If the positive polarity of the device beiig
C.
powered is also to be ground reference,
jumper the (+) terminal 9 to the (+ ) ter-
minal 8
If the negative polarity of the
.
device being powered is to be ground ref-
erence, jumper the (-) terminal 10 to the
negative polarity of the device bemg pow-
ered is to be grounded, but the chassis of
the device needs grounding, connect a sep-
arate test lead from the chassis of the device
to the ( * 1 terminal 8 of the power supply.
7
Return the "STBYDC ON" switch 7 to the
.
DC ON position and set the output voltage as
follows:
Set the METER RANGE switch 12 to the
a.
0-25V position if the output voltage is to be
set for 25 volts or less, or to the 0-50V posi-
tion if the output voltage is to be sat for
more than 25 volts.
b.
Turn LEVEL control 13 clockwise until the
desired output voltage is read on the volt-
meter
11 .
8. If the load current exceeds the current limit, the
OVERLOAD lamp 5 will light and the power
supply will shut down .(the current meter
and voltmeter 11
supply
. .
13 from increasing the
If neither the positive nor
.
will drop to zero). Restore
to normal operation as
1
5
Hide quick links:
Advertisement
Table of Contents
