Keithley 6430

Range, Digits, Speed, and Filters 6-13
Auto filter
When Auto Filter is enabled, it automatically selects filter settings that provide heavy filter-
ing on the low current ranges, and less filtering as the current range increases. See Tables 6-5
through 6-7.
NOTE Enabling Auto Filter disables the Advanced Filter.
When Auto Filter is disabled, the present count and rank settings for the three filters are used
for all measurement functions and ranges. For example, assume Auto Filter is enabled, speed is
set to 1 PLC and the 10pA range is selected. For this configuration (as shown in Table 6-6),
repeat count is 10, median rank is 3 and moving count is 5. If you disable Auto Filter, these set-
tings will be retained for every voltage and current range.
Table 6-5
Auto filter settings where NPLC = 0.01 to 0.10
Current range Repeat count Median rank Moving count
001pA
010pA
100pA
001nA
010nA
100nA
001µA
010µA
100µA
001mA
010mA
100mA
10
10
10
10
10
10
10
1
1
1
1
1
5
3
1
0
0
0
0
0
0
0
0
0
34
15
10
5
1
1
1
1
1
1
1
1