Keithley 6485 User Manual

Model 6485 Picoammeter Instruction Manual Triggering 7-15
To start the test, press STEP on the switching mainframe to take it out of idle and start the
scan. The switching mainframes output pulse triggers Model 6485 to take a reading and
store it. Model 6485 then sends an output trigger pulse to the switching mainframe to
close the next channel. This process continues until all 10 channels are scanned, measured,
and stored.
Figure 7-9
Operation model for triggering example
Idle
Bypass
B
Wait for
Trigger Link
Trigger
Scan
Channel
C
Output
Trigger
Trigger
D
No
Scanned
10
Channels
?
Yes
7001or 7002
Make
Measurement
Made
10
Measurements
?
6485
Press STEP to start scan
A
Wait for
Trigger Link
Trigger
E
Output
Trigger
Trigger
F
No
Yes
Idle

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)