Keithley 2002, Getting Started Manual

Page: 50 / 95

Ratio and delta calculations
With RATIO or DELTA selected from the SCAN OPERATION menu, the Model 2002 can
measure two specified internal scanner channels (reference channel and measure channel) and
then compute the ratio or difference (delta) between them. Valid measurement functions for ratio
and delta include DCV,
Ω
2 and
Ω
4.
Ratio and delta are calculated as follows:
Perform the following steps to perform ratio or delta calculations:
1. Select and configure ratio or delta as follows. Note that a menu item is selected by plac-
ing the cursor (using
and keys) on it and pressing ENTER. See MENUS if you
need more information to navigate through the menu structure.
• Press CONFIG
• Press SCAN
• Select RATIO or DELTA
• Select MEASURE
• Select CH1, 2, 3, 4, 5, 6, 7, 8, 9 or 10
• Select REFERENCE
• Select CH1, 2, 3, 4, 5, 6, 7, 8, 9 or 10
• Select FUNCTION
• Select DCV,
Ω
2 or
Ω
4
Use the EXIT key to back out of the menu structure.
2. Press SCAN to halt triggers (instrument goes into idle).
3. To start ratio or delta measurements, press SCAN or TRIG. The displayed readings are
the result of the ratio or delta calculation.
4. To stop ratio or delta measurements, press EXIT.
Ratio
Measure
Reference
------------------------ =
Delta Measure Reference – =
Measurement Options 2-25