Keithley 2000 User Manual

Scanning examples
The following examples demonstrate the use of reading count, timed scans, delay, and exter-
nal scanning.
Counters
One of the configuration options for stepping and scanning is the reading count. The example
of Figure 3-14 shows how different settings of RDG CNT affect these operations:
• With a reading count (0010) equal to the scan list length (10), a step operation consecu-
tively closes ten channels and sends an output trigger after each channel. A scan opera-
tion also consecutively closes ten channels but sends an output trigger only at the end of
the scan.
• With a reading count (0020) greater than the scan list length (10), stepping yields 20
channel closures and 20 output triggers. Scanning also goes through the scan list twice
but sends an output trigger only at the end of each scan.
• With a reading count (0002) less than the scan list length (10), stepping yields two chan-
nel closures and output triggers. Scanning goes through the entire scan list and sends an
output trigger but only two readings are stored.
TYPE: INT
MIN CHAN: 1
MAX CHAN: 10
TIMER? OFF
RDG CNT:
0010 0002
0020
STEP
20 channel closures
20 output triggers
SCAN
10 channel closures (x2)
2 output triggers
RECALL
20 Readings
STEP
10 channel closures
10 output triggers
SCAN
10 channel closures
1 output triggers
RECALL
10 Readings
STEP
2 channel closures
2 output triggers
SCAN
10 channel closures
1 output triggers
RECALL
2 Readings
Note: "Factory setup" on the
Model 2000 is assumed.
SHIFT-CONFIG
Figure 3-14
Internal scanning
example with
reading count op-
tion
Measurement Options 3-27

Keithley 2000 Specifications

General

Brand	Keithley
Model	2000
Category	Multimeter
Language	English