Keithley 6485 User Manual

7-6 Triggering Model 6485 Picoammeter Instruction Manual
Trigger delay
A programmable delay is available after event detection. It can be set manually (0 to
999.9998 seconds) or an auto delay can be used. With auto delay selected, the Model 6485
automatically sets delay according to range. The auto delay settings are listed in Table 7-1.
Measure action
The measure action block of the trigger model is where a measurement is performed.
However, if the repeating filter is enabled (see Figure 7-3), the instrument samples the
specified number of reading conversions to yield single filtered reading. Only one reading
conversion is performed if the digital filter is disabled, or after the specified number of
reading conversions for a moving average filter is reached.
Figure 7-3
Measure action block of trigger model
Table 7-1
Auto delay settings
Range Delay
2nA
20nA
200nA
2µA
20µA
200µA
2mA
20mA
10ms
10ms
10ms
10ms
5ms
5ms
1ms
0.5ms
Filter Process (Repeat)
CONV CONV CONV
CONV = Reading Conversion
Measure Action

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)