Keithley 2002, User Manual

Page: 122 / 366

Front Panel Operation
2-105
Timestamp type for bus readings is coupled to timestamp
type for buffer readings. Thus, if you change timestamp type
from this menu structure, it also changes in the CONFIG
DATA STORE menu structure (see paragraph 2.8).
RESET-TIME:
This item is used to reset the relative time-
stamp to 0.000000 seconds. The timestamp also resets to
zero seconds when the instrument is turned on. It has no
effect on the real-time clock.
RESET-RDG#:
This menu item is used to reset the reading
number to zero. The reading number also resets to zero when
the instrument is turned on.
DECIMAL
This menu item lets you select between periods and commas
to signify decimal points on the front panel display.
The following options are available for DECIMAL:
PERIOD:
This option selects the period (.) as the decimal
point for readings.
COMMA:
This option selects the comma (,) as the decimal
point for readings.
CLOCK
The Model 2002 has a real-time clock that is used for time-
stamping bus and buffer readings (real-time timestamp), and
as a control source for the Arm Layer (Arm Layer 1). This
GENERAL MENU selection is used to set the time date and
format (12-hour or 24-hour) for the real time clock.
The menu items for CLOCK are explained as follows:
TIME:
This item is used to set the time for the clock. If the
12-hour format is selected, “AM” or “PM” will be displayed.
The absence of “AM” or “PM” denotes the 24-hour format.
The format for time can be changed with the FORMAT menu
item. Use the cursor keys and the range keys to set the time
(hours:minutes:seconds).
DATE:
This item is used to set the date for the clock. Use the
cursor keys and the range keys to set the date. Note that the
day of the week (Sun, Mon, etc.) is automatically calculated
and displayed for the date.
FORMAT:
This item is used to select the time format for the
clock:
• 12-HOUR — With this selection, real-time timestamps
for buffer readings are provided in the 12-hour format
(AM or PM). Also, the real-time clock control source
for the Arm Layer must be set using the 12-hour format.
• 24-HOUR — With this selection, real-time timestamps
for buffer readings are provided in the 24-hour format.
Also, the real-time clock control source for the Arm
Layer must be set using the 24-hour format.
Note that real-time timestamps for bus readings are always
provided in the 24-hour format, regardless of the FORMAT
selection.