KEPCO ATE-DMG SERIES - Manual (Page 15)

ATE-DMG OPER 042314 1-1
SECTION 1- INTRODUCTION
1.1 SCOPE OF MANUAL
This manual contains instructions for the installation, operation and maintenance of the ATE-
DMG series of voltage and current stabilized d-c power supplies, manufactured by Kepco, Inc.,
Flushing, New York, U.S.A.
1.2 GENERAL DESCRIPTION
The Kepco ATE-DMG with programmable overvoltage protector is a precision stabilized power
supply which can deliver either stabilized output voltage or current. The prevailing operating
mode is indicated by LED mode indicators on the front panel. Operating mode crossover is
automatic and may be monitored remotely by commands provided via the GPIB port. A digital
front panel display shows the output voltage and output current. This power supply has a linear
and fully dissipative NPN pass transistor section driven by high-gain, integrated circuit amplifi-
ers. The output of the power supply is fully programmable via either the GPIB port or the front
panel keypad. Terminals are also provided for remote error sensing, as well as for the connec-
tion of the output capacitor directly at the load.
The ATE-DMG power supply features user-selectable “slow” or “fast” operating modes. Slow
mode operation is recommended for applications demanding a constant voltage source. Fast
mode operation is best if the output voltage must change rapidly, either in response to an exter-
nal programming signal or, if the ATE-DMG is used as a current stabilizer.
The ATE-DMG power supply is delivered for “slow mode” operation. See Section 2, par.
2.7 for converting the ATE-DMG power supply to “fast mode” operation.
A continuously adjustable overvoltage protection circuit is a built-in feature. The trigger point of
the overvoltage protector may be set (or checked) under actual operating conditions by the front
panel accessible setup controls (refer to Section 2 of this manual).
Power transistors and drivers on all ATE-DMG designs are mounted onto highly efficient, pat-
ented heat sink assemblies which are cooled by low-noise fans. The ATE-DMG main chassis
assemblies, as well as the wraparound covers, are constructed from cold-rolled steel The front
panels are made from aluminum (refer to the “Mechanical Outline Drawing,” Figure 1-2).
1.3 SPECIFICATIONS
Table 1-1 lists the output parameters applicable to individual models. Table 1-2 lists general
specifications applicable to all full-rack models except where otherwise noted. Table 1-3 lists
dynamic specifications and Table 1-5 lists static specifications. Mechanical specifications are
presented in the mechanical outline drawing, Figure 1-2.
1.4 LOCAL CONTROL
Front panel keypad entries are utilized for setting and adjusting output voltage and current
under local control. The keypad's keys are organized to either directly execute commands, or to
introduce a program that can either be run once or cycled. Calibration of the unit is facilitated by
a password -protected, menu-driven procedure from the front panel.
1.5 REMOTE CONTROL
The ATE-DMG Power Supply can be remotely controlled directly via the IEEE 488.2 (GPIB) bus
using SCPI commands. All features available in local mode can also be accessed remotely. In