KEPCO Kit 219-0439, 219-0440, 219-0441, ATE-DMG External Control Kit - Manual (Page 3)

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KEPCO, INC. G 131-38 SANFORD AVENUE G FLUSHING, NY. 11352 U.S.A. G TEL (718) 461-7000 G FAX (718) 767-1102
http://www.kepcopower.com G email: [email protected]
3. TECHNICAL MANUAL ADDITIONS
3.1 FAST/SLOW MODE
PAR. 2.7.4 steps 4 through 7 of the ATE-DMG Service Manual are replaced by the following: Remove jumper on adpater assembly
A11 between J3 pins 1 and 2; install jumpers between J3 pins 3 and 4 and between J3 pins 5 and 6. NOTE: Spare jumpers located
on J5.
3.2 USING THE EXTERNAL ANALOG REFERENCE
The following paragraphs describe the external control features available after the field upgrade kit has been installed.
The ATE-DMG now has the capability to control the output using a external d-c analog reference voltages. Analog references for
both voltage and current are required to produce an output. Two uncommited amplifiers (preamps”A” and “B”) included in the unit
can be used for signal conditioning. Each preamp has an inverting input (-), non-inverting input (+), and output, and a zero adjust-
ment, and are accessable via A11J5 pins as shown in Figure 3. (For further details about Preamp “A” and “B” go to www.kepco-
power.com/support and download the manual for ATE 1/4 Rack, 1/2 Rack 3/4 Rack or Full Rack, PAR’s 3-37 through 3-84.)
Connections to A11J5 can be made via discrete wires, a flat ribbon cable not exceeding 1 foot in length or by discrete wires termi-
nated into crimp style pins inserted into a 5x2 housing (not supplied). The following parts are recommended, but not supplied: rib-
bon cable: AMP 746285-1 (Kepco P/N 142-0246); Housing for discrete wires: Molex 39-01-2100 (Kepco P/N 142-0434); Pins:
Molex 39-00-0039 (Kepco P/N 107-0290, 4 ea.).
NOTE: Connector A11J5 has two spare jumpers installed. When making connections to A11J5, move each spare jumper to a sin-
gle pin of connector J3 (DO NOT SHORT J3 PINS).
1. Connect a 0 to 10V voltage reference to A11J5 pin 1 (pin 6 common); 0V programs the output voltage to zero, 10V pro-
grams output voltage to full scale.
2. Connect a 0 to 1V current reference to A11J5 pin 2 (pin 8 common), 0V programs the output current to zero, 1V programs
output current to full scale.
3. Turn on the external reference feature by sending the DIAG:EXT 01 command via the GPIB interface.
4. To access the external reference feature from the front panel, with the power supply in command entry status , press
MENU key 13 times until the top line of the display reads Extern. Ref On or Extern. Ref Off . and the bottom
line reads 0=Off, 1=On . Enter 1 to enable or 0 to disable and press ENTER to enable or disable the feature.
5. To access the feature from the GPIB the following commands are used.
To access external analog control from the GPIB, the following commands supplement those listed in Appendix B of the ATE-DMG
Technical Manual.
B.91
[SOURce:]VOLTage:[:LEVel]MODE
COMMAND
VOLT:MODE
Syntax: Short Form: [SOUR:]VOLT[:LEV]:MODE {FIX | EXT}
Long Form: [SOURce:]VOLTage[:MODE {FIXed | EXTernal}
Description: Established whether control of the output voltage is via keypad or GPIB commands (FIXED) or via external
analog 0 to 10V reference (EXTERNAL). Setting is stored in NVRAM and retained upon subsequent power up.
B.92
[SOURce:]VOLTage:[:LEVel]MODE?
QUERY
VOLT:MODE?
Syntax: Short Form: [SOUR:]VOLT[:LEV]:MODE?
Long Form: [SOURce:]VOLTage[:LEVel]MODE]?
Return Value: FIXED or EXTERNAL
Description: Returns FIXED or EXTERNAL whether voltage control is from the keypad or GPIB interface (FIXED) or from
an external analog reference voltage (EXTERNAL).
B.93
[SOURce:]CURRent:[:LEVel]MODE
COMMAND
CURR:MODE
Syntax: Short Form: [SOUR:]CURR[:LEV]:MODE {FIX | EXT}
Long Form: [SOURce:]CURRent[:MODE {FIXed | EXTernal}
Description: Established whether control of the output current is via keypad or GPIB commands (FIXED) or via external
analog 0 to 1V reference (EXTERNAL). Setting is stored in NVRAM and retained upon subsequent power up.