Front Panel Operation
2-3
2.2.3 Power-up sequence
On power-up, the Model 6517A performs self-tests on its
EPROM and RAM, and checksum tests on data stored in
non-volatile memory. (See Table 2-2.) If a failure is detected,
the instrument momentarily displays an error message and
the ERR annunciator turns on. (Messages are listed in Table
2-3.)
NOTE
If a problem develops while the instru-
ment is under warranty, return it to Kei-
thley Instruments, Inc. for repair.
If the instrument passes the self-tests, the firmware revision
levels and the communications status are displayed. An ex-
ample of this display is shown as follows:
Model 6517A
Rev. B12 A02 IEEE Addr=27 SCPI
The firmware revision levels (left to right) are for the main
microcontroller and display microcontroller. The revision
level number may be different in your particular unit. The
IEEE-488 address is its default value of 27 and the SCPI lan-
guage is selected. DDC will be displayed if the DDC lan-
guage is selected instead. If the RS-232 interface is selected,
the message “RS-232 enabled” is displayed instead of the
IEEE-488 address.
Next, if the unit is configured to display the calibration due
date at power-up, the unit shows the following:
Model 6517A
Calibration due: mmm/dd/yy
where “mmm” is the month abbreviation, “dd” is the day,
and “yy” is the year. If no calibration date is set, the display
shows that it is due now. (See the Model 6517 Service Man-
ual to set the calibration due date and paragraph 2.19.3 of this
manual to set the display option.)
After the power-up sequence, the instrument begins its nor-
mal display with zero check enabled (“Zero Check” dis-
played).
Power-up error messages
Error messages that may be displayed during power-up are
summarized in Table 2-3. These are shown when one of the
checksum tests of Table 2-2 fails.
2.2.4 Power-on default conditions
Power-on default conditions are those conditions the instru-
ment assumes when it is first turned on. You can change these
power-on default conditions (except the primary address) by
using the save setup feature that is available with the MENU
key, as described in paragraph 2.19.1.
Table 2-2
Data checked on power-up
Data
Type of storage
IEEE-488 address
Power-on default
Calibration constants
Calibration dates
Instrument setups
Reading buffer
Electrically-erasable PROM
Electrically-erasable PROM
Electrically-erasable PROM
Electrically-erasable PROM
10 in electrically-erasable PROM
Non-volatile RAM
Table 2-3
Power-up error messages
Message
Action
Error +515,
Calibration dates lost
Error +514,
Calibration lost
Error +512,
Power-on state lost
Error +511,
GPIB address lost
Error +510,
Reading buffer data lost
Error -314,
Save/recall memory lost
The cal dates are set to factory
default values, but they are not
stored into EEPROM.
To do this, perform a compre-
hensive calibration.
Cal constants are set to factory
default values, but they are not
stored into EEPROM. To do
this, perform a comprehensive
calibration.
Power-on defaults are reset to
factory defaults (bench) and
stored into EEPROM.
GPIB address is reset to factory
default (27) and stored into
EEPROM.
The reading buffer controls are
reset to factory defaults, but
they are not stored into
NVRAM. To do this, store read-
ings in the buffer.
Instrument setup is reset to
bench defaults are stored in
EEPROM.
Note: Any of these error conditions may occur the first time a unit is
turned on or after replacing the firmware.
