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CONTROLS AND INDICATORS
1. POWER Switch. Turns power on and off.
2. Power ON light. Red LED lights to indicate a power on
condition.
3. GND Terminal (Green). Earth and Chassis Ground.
4. A/B Metering Switch. Selects simultaneous Voltage &
Current metering for the “A” or “B” supplies. When in the
A position, the V and mA meters are connected to the “A”
supply. When in the B position, the V and mA meters are
connected to the “B” supply.
5. V Meter. Indicates voltage on the “A” or “B” supply
depending on the position of the A/B Metering switch.
6. mA Meter. Indicates current on the "A" or "B" supply
depending on the position of the A/B Metering switch.
7. Zero Adjusts. Mechanical zero adjusts for the V & mA
Meters thru the front panel with a slotted screwdriver.
8. TRACKING/INDEPENDENT Mode Switch: Three
Position switch that selects INDEPENDENT mode,
PARALLEL TRACKING mode, or SERIES TRACKING
mode of the “A” and “B” supplies as follows:
a. When the switch is in the right position, the unit is
in the INDEPENDENT mode and the “A” and “B”
power supplies are completely independent from
one another.
b. When the switch is in the middle position, the
unit is in the PARALLEL TRACKING mode. In
this mode the “A” and “B” supplies are wired
together in parallel and both the maximum
current and voltage are set using the “A”
controls. The “A” and “B” outputs can be used
as two individual (but tracking) power supplies
or just the “A” output can be used as a 0-to-24
volt supply with a 1 A capability.
c. When the switch is in the left position, the unit is
in the SERIES TRACKING mode. In this mode,
maximum voltage of both supplies is set using
the “A” VOLTAGE controls (voltage at output
terminals of the “B” supply tracks the voltage at
the output terminals of the “A” supply). Also, in
this mode of operation the positive terminal (red)
of the “B” supply is internally connected to the
negative terminal (black) of the “A” supply.
This allows the two supplies to be used as one 0-
to-48 volt supply.
“A” SUPPLY CONTROLS AND INDICATORS
9. VOLTAGE Control. Adjusts the output voltage of the
“A” supply. Also functions as the adjustment control for
the maximum output voltage of the “B” supply when either
parallel or series tracking mode is selected. Voltage can be
read from the V Meter when the A Metering mode is
selected.