Power-Up Sequence; System Identification - Keithley 2500 User Manual

Model 2500 and 2502 User's Manual

Power-up sequence

On power-up, the Model 2500 performs self-tests on its EPROM and RAM and
momentarily 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
NOTE
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.
Also displayed is the line frequency (50 or 60Hz). (If the wrong frequency is displayed, it
can be manually set as covered below). The communication interface status is briefly dis-
played. 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 25 (factory
default), the IEEE Addr=25 message is displayed. If the RS-232 interface is selected, the
RS-232 message is displayed.
After the power-up sequence, the instrument goes to its normal display state with the out-
put off (red ON/OFF OUTPUT indicator light off).
System identification
To obtain the serial number and revision information, use the MENU/GENERAL/
SERIAL # selection or the *IDN? query via remote.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
Appendix B.
If a problem develops while the instrument is under warranty, return it to
Keithley Instruments, Inc., for repair.
A02 is the display board ROM revision.
Getting Started 1-11