Power-Up Sequence; System Identification; Line Frequency Setting - Keithley 6430 Instruction Manual

Power-up sequence

On power-up, the SourceMeter performs self-tests on its EPROM and RAM and momen-
tarily lights all segments and annunciators. If a failure is detected, the instrument momentarily
displays an error message, and the ERR annunciator turns on. Error messages are listed in
Appendix B.
NOTE
If a problem develops while the instrument is under warranty, return it to Keithley
Instruments, Inc., for repair.
If the instrument passes the self-tests, the firmware revision levels are displayed. For
example:
REV A01 A02
where: A01 is the main board ROM revision.
A02 is the display board ROM revision.
Also displayed is the line frequency (50, 60, or 400Hz). (If the wrong frequency is dis-
played, it can be manually set as covered below). The communication interface status is briefly
displayed. If the IEEE-488 bus is the presently selected interface, the identification message
will include the primary address. For example, if the primary address is 24 (factory default), the
"IEEE Addr=24" message is displayed. If the RS-232 interface is selected, the "RS-232" mes-
sage is displayed.
After the power-up sequence, the instrument goes to its normal display state with the output
off (red OUTPUT indicator light off). With the output off, the "OFF" message is displayed, and
dashes replace the reading. The "OFF" message indicates that the NORMAL output-off state is
selected. See Section 12, Output configuration for details.
System identification
To obtain the serial number and revision information, use the MENU/GENERAL/SERIAL #
selection or the *IDN? query via remote.

Line frequency setting

At the factory, the SourceMeter is configured to sense the power line frequency and auto-
matically select the frequency setting. If, however, the line power source is noisy, the Source-
Meter may select the wrong setting on power-up. If this situation occurs, noisy measurement
readings will result, and accuracy may be affected. You can manually set the line frequency
from the front panel or via remote as covered below.
Front panel line frequency
Set the line frequency from the front panel as follows:
1. Press the MENU key to display MAIN MENU.
Getting Started 1-13