User manual

Front Panel Operation
3-98 2001-900-01 Rev. K/ August 2010
SCAN OPERATION menu
Table 3-41 summarizes the SCAN OPERATION menu
structure, which is discussed in more detail in the following
paragraphs. See paragraph 3.3 for more information on
menu navigation.
Pressing CONFIG-SCAN will display the following menu:
SCAN OPERATION
INTERNAL EXTERNAL RATIO DELTA
These choices select the action the instrument will take when
it is triggered.
INTERNAL: This selection enables scanning with the
internal scanner card. When this selection is chosen, the
Model 2001 will change to the function specified for the first
channel and then close the channel and take a reading. When
the next trigger is received, the instrument will open the
present channel, change to the specified measuring function
for the next channel, and then close the channel and take a
reading. The process repeats until all channels in the list are
scanned.
The instrument defaults to this selection if it detects a
scanner card on power-up.
EXTERNAL: This menu selection enables scanning with an
external scanner card located in a switching mainframe. This
selection operates in a manner similar to INTERNAL except
that the internal scanner is not used. When this menu item is
selected, the instrument will immediately change to the
selected measuring function for the first channel. When the
multimeter is triggered, it will take a measurement and then
change to the measurement function for the next channel.
This process repeats until all channels in the scan list are
scanned.
The instrument defaults to this selection if it does not detect
a scanner card on power-up.
RATIO/DELTA: Either of these two selections configures
the Model 2001 to measure the two specified internal
scanner channels and then compute the ratio or difference
(delta) between them. When RATIO or DELTA is selected,
the instrument will close the scanner reference channel and
then wait for a trigger. When the reading is triggered, the unit
will make a measurement on the reference channel, switch to
the measurement channel, and then take a second
measurement. After measuring the measurement channel,
the unit will compute and display the ratio or delta value, and
switch back to the reference channel to wait for the next
trigger.
NOTE
The result of the Ratio calculation is
always displayed in 7H-digit scientific
notation.
RATIO/DELTA channel selection: To select channels for
RATIO and DELTA, select RATIO or DELTA as
appropriate.
Selecting RATIO will display the following menu and allow
you to set the measure or reference channel:
CONFIGURE RATIO
MEASURE REFERENCE FUNCTION
Selecting MEASURE will display the following:
RATIO MEASURE CHAN
CH12345678910
Use the cursor keys to select the measure channel, then press
ENTER.
Similarly selecting REFERENCE will display:
RATIO REFERENCE CHAN
CH12345678910
Again, use the cursor keys to select the channel to be used as
the ratio reference channel, then press ENTER.
The FUNCTION menu appears as follows:
SET RATIO FUNCTION
DCV 2 4
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SCAN OPERATION menu structure
Menu item Description
INTERNAL Enables internal scanning.
EXTERNAL Enables external scanning.
RATIO
MEASURE
REFERENCE
FUNCTION
Enables ratio mode (internal).
Selects measure channel.
Selects reference channel.
Selects ratio function.
DELTA
MEASURE
REFERENCE
FUNCTION
Enables delta mode (internal).
Selects measure channel.
Selects reference channel.
Selects delta function.