___________________________________________________________________________OPERATING INSTRUCTIONS
Hook-up
1. Observe proper polarity. If the circuit being powered
is not equipped with reverse polarity protection,
3. Set the INDEPENDENT/TRACKING mode switch to
damage to the circuit can result from reverse polarity.
the right position so that the power supply is in the
Use color coded hook-up leads, for convenience in
INDEP endent operating mode.
identifying polarity, red for (+) and black for (-).
4. Set the A/B Metering selection switch to the A (up)
2. Make sure that the hook-up leads offer sufficient
position to monitor the “A” supply.
current capability and low resistance between the
5. Turn off the power supply and the equipment to be
power supply and the circuits being powered. The
powered during hook-up.
hook-up leads supplied with the power supply are
6. Connect the positive polarity of the device being
rated for 4 amp.
powered to the red (+) terminal of the power supply.
7. Connect the negative polarity of the device being
Typical Constant Voltage Operation
powered to the black (-) terminal of the power supply.
1. Before connecting the device to be powered to the
8. Fig. 3 illustrates the grounding possibilities when used
power supply, determine the maximum safe load
in the INDEP endent mode.
current for the device to be powered and set the
a. If the negative polarity of the equipment or circuit
current limit value (see “Setting Current Limit”
being powered is also the chassis or common, it may
procedure in this section).
be grounded to earth by strapping the black (-)
2. Set the A/B Meter selection switch to the A (up)
terminal to the green (GND) terminal as shown in Fig.
position to monitor the “A” supply.
3A.
3. Set
VOLTAGE
control to minimum (fully
b. Similarly, the positive polarity can be grounded by
counterclockwise).
strapping the red (+) terminal to the green (GND)
4. Turn off power supply and connect it to the device
terminal as shown in Fig. 3B.
to be powered (see “Hook-Up” procedure in this
c. If an earth ground reference is not required, the
section).
configuration of Fig. 3C may be used. The scheme in
5. Turn on
POWER
switch. The
CONSTANT
Fig. 3C should also be used where it is not known
CURRENT indicator should not light.
whether the chassis is common with either the
6. Increase the VOLTAGE setting until the Volt meter
positive or negative polarity.
reads the desired value.
d. If the chassis or common of the equipment being
7. The load current is read directly on the mA meter.
powered is separate from both the positive and
negative polarity power inputs, use the connection
shown in Fig. 3D.
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