Keithley 6485 User Manual

8-4 Limit Tests Model 6485 Picoammeter Instruction Manual
Figure 8-3
Operation model for limit test
NOTE Display messages indicate which test or tests have failed, but they do not indi-
cate which limit (HI or LO) has failed. When using remote operation, you can
determine which limit failed by reading the measurement event register. See Ref
B for the FAIL? commands in Table 8-2.
Relative (Rel), mX+b, m/X+b, and log can be used with limit testing. The tests
will be done on the result of the math operation (not the input values). These
math operations are covered in Section 5.
Pass
?
Start
Measure
DUT
Yes
Limit 1
Test
No
Display
L1
Limit 2
Test
Pass
?
Display
L2
Display
OK
Yes
No
End

Keithley 6485 Specifications

General

Model	Keithley 6485
Category	Picoammeter
Input Impedance	>10^14 Ohms
Voltage Burden	<200µV
Accuracy	0.4% of reading
Voltage Source Range	Not Applicable
Voltage Source Resolution	Not Applicable
Voltage Source Accuracy	Not Applicable
Interface	IEEE-488
Power Requirements	100V to 240V AC, 50/60Hz
Dimensions	89 mm high x 214 mm wide x 369 mm deep (3.5 in x 8.4 in x 14.5 in)