Keithley 2000, User Manual, Page: 49 / 280

Configuration
To configure the mX+b calculation, perform the following steps:
1. Press SHIFT then MX+B to display the present scale factor:
M: +1.000000 ^
2. Enter a value and units prefix. Use the and keys to choose a numerical place and
use the
▲
and
▼
keys to increment or decrement the digits.
3. Press ENTER to confirm the M value and display the B value:
B: +00.00000 m
4. Enter a value and units prefix.
5. Press ENTER to confirm the B value and display the UNITS designation:
MXB
6. Scroll through the letters to change and press ENTER when done.
The Model 2000 then displays the result of the calculation.
Percent
This item selects the percentage calculation and lets you specify a reference value. The dis-
played reading will be expressed as a percent deviation from the reference value. The percentage
calculation is performed as follows:
where: Input is the normal display reading.
Reference is the user entered constant.
Percent is the displayed result.
Configuration
To configure the percent calculation, perform the following steps:
1. Press SHIFT then % to display the present value:
REF:+1.000000^
2. Enter a reference sign, value, and units prefix. Use the and keys to choose a nu-
merical place and use the
▲
and
▼
keys to increment or decrement the digits.
3. Press ENTER when done.
The Model 2000 will display the result of the calculation. The result is positive when the input
exceeds the reference and negative when the input is less than the reference. Engineering units
are used to show values in the range 1 nano to 1000G. Exponential notation is used above that
range.
Percent
Input - Reference
Reference
------------------------------------------
100%
×
=
Basic Measurements 2-31