Front Panel Operation
3-94
PERCENT
This selection lets you specify the target value for the per-
centage calculation. The default message indicating the pres-
ently set target value is displayed as follows:
100%= +1.000000e+00
1. To retain the displayed target value, press ENTER or
EXIT.
2. To set a different target, use the cursor keys ( and )
to select the digits, and the RANGE
▲
and
▼
keys to in-
crement and decrement the digits. Press ENTER when
done.
PERCENT DEVIATION
This menu item selects the percent deviation calculation and
returns the display to the normal measurement state.
3.10.5 Enabling math
The MATH key toggles the selected math operation on and
off from the normal reading display. Once a math operation
is enabled, it is in effect across function changing. This is in-
dicated by the MATH annunciator and, at the right side of the
top line, the type of math enabled (NONE, mX+b, or %).
Pressing the MATH key to enable a math operation momen-
tarily displays one of the following typical messages:
Math Enabled
Display = NONE (Reading)
or
Math Enabled
Display = mX+b (Reading)
or
Math Enabled
Display = % (Reading)
Then the Model 2001 displays the result of the calculation on
the top line, using scientific notation where necessary.
3.10.6 Calculate multiple display
One of the multiple displays lets you view the reading on the
bottom line of the display and the result of the calculation on
the top line. This display is available by repeatedly pressing
either the NEXT or PREVious DISPLAY key to scroll
through the multiple displays for the particular function. The
following is a typical message for a percentage calculation:
-7.0431e+01 VDC %
Reading = -0.704311
The display resolution on the bottom line follows that chosen
for the top line. If scientific notation is required on the top
line, it is fixed at 4.5 digits. The value on the bottom line
tracks the units and prefix of the top line. (For example, if the
top line displays µA, then the units on the bottom line are
µA.)
Note that this multiple display is not available on the fre-
quency function.
3.11 Scanning
The Model 2001 can be used with an internal scanner card
(Model 2001-SCAN) or with external scanner cards installed
in switching mainframes such as the Models 706 and 7001.
The following paragraphs discuss various aspects of using
scanning with the Model 2001.
3.11.1 Scanning overview
A scanner allows you to switch among a number of input sig-
nals to the Model 2001 for measurement. The channel con-
trol and scanning capabilities depend on whether an internal
or external scanner card is being used, as well as on the ca-
pabilities of the scanner card in question. Refer to the docu-
mentation supplied with the scanner card for specific
connection information.
Using an internal scanner card
The optional Model 2001-SCAN scanner card allows you to
switch or scan up to ten 2-pole channels, or five 4-pole chan-
nels. Two of the channels use solid-state switching for high-
speed multiplexing, ratio, or delta applications.
When using this card, the Model 2001 can:
• Close and open individual channels.
• Scan through channels using a separate measurement
function for each channel, if desired.
• Perform ratio and delta measurements using two user-
defined channels.
Using external scanner cards
When using external scanning, you can define separate mea-
surement functions for a maximum of 80 channels. Note
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