Overview Of Measurement Process - Keithley 2001 Operator's Manual

Getting Started
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Menu summary
CONFIG-DCV Press the CONFIG key, then the DCV
key, to view the top level of the DCV
configuration menu. Access to other
function and operation configurations are
similar, e.g., CONFIG-ACV or CON-
FIG-TRIG.
MENU Press the MENU key to view the top
level of the main menu. The operations
that have no corresponding key are
included in the main menu.
or Use the cursor keys to move the high-
lighted cursor among menu selections, or
the digits of a parameter value, or change
channels on the scanner.
RANGE 
Use the RANGE keys to increment and
RANGE 
decrement digits of a parameter value.
ENTER Accepts menu selection or data entry.
EXIT Cancels changed menu selection. Also
returns you to the previous menu level.
INFO Displays context-sensitive information
about the present menu level. Toggles
information message on/off.
Buffered readings display
After readings have been stored in the buffer, they are
displayed on the front panel by pressing the RECALL key.
This action brings up the first reading in the buffer, such as:
+00.00000 VDC
Rdg#+00000 @Time=+000.000000 sec
where the top line shows the reading, and the bottom line
shows the reading number and time-stamp. The RANGE 
and  keys scroll through the readings and the
keys change the digit being scrolled. You can scroll through
statistical data on the buffered readings by pressing the
NEXT and PREVious DISPLAY keys. This also gives you
the option of printing the data.
Buffered readings are preserved across
power transition when the memory
options are installed.
2-6
Message displays
While operating the Model 2001, the front panel display is
also used for showing status and error messages. These
messages are shown to inform you of parameter conflicts,
trigger overruns, etc. Refer to
complete list of these messages.
Section 4, IEEE-488 Reference, describes the programming
of user messages to be shown on the front panel. (See
:DISPlay subsystem.) Both lines of the display are available
for this purpose.
2.3

Overview of measurement process

The following overview is intended to acquaint you with the
basic measurement fundamentals without overwhelming
you with the details of enhanced capabilities. This brief
overview is sufficient to support the operation examples in
paragraph 2.5
bus). For a complete explanation on all aspects of the
measurement process, see
The simplified model for a measurement operation is shown
in Figure 2-3. As shown, the measurement operationconsists
of three layers: the arm layer, scan layer, and measure layer.
Arm
Layer
Scan
Layer
and
Measure
Layer
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Simplified model of measurement operation
paragraph 3.3.4
(front panel) and paragraph 2.6
paragraph 3.7.
Idle
Yes Another
Arm
?
Arm
Event
Yes Another
Scan
?
Scan
Event
Another
Yes
Measure-
ment
?
Measure
Event
Device
Action
2001-900-01 Rev. K / August 2010
for a
(IEEE-488
No
Arm
Count
No
Scan
Count
No
Measure
Count