Limit Testing; Figure 8-1 Limit Tests; Figure 8-2 Limit Tests Example - Keithley 6485 Instruction Manual

8-2 Limit Tests

Limit testing

As shown in
is used as the wide pass band and Limit 2 is used as the narrow pass band. It is up to the
user to specify limits that conform to this pass band relationship.
Figure 8-1
Limit tests
Fail
Fail
Figure 8-2
and LO limits for limit 2 are ±1mΑ. A 0mA reading passes both limit 1 and limit 2 tests. A
+1.5mA reading passes limit 1 but fails limit 2. A +2.5mA reading fails both limit 1 and
limit 2.
Figure 8-2
Limit tests example
Fail
Fail
Figure 8-1, there are two limit tests that can be performed on a DUT. Limit 1
LO
Pass
Limit
LO
Pass
Limit
shows an example where the HI and LO limits for limit 1 are ±2mA, and the Hi
-2mA
Pass
LO Limit
-1mA
Pass
LO Limit HI Limit
Model 6485 Picoammeter Instruction Manual
HI
Fail
Limit
HI
Fail
Limit
+2mA
Fail
HI Limit
+1mA
Fail