Keithley 6485 User Manual

Model 6485 Picoammeter Instruction Manual Triggering 7-11
Programming example
The following command sequence will trigger and return 10 readings.
*RST ' Return 6485 to RST defaults.
ARM:SOURce IMMediate ' Set arm control source Immediate.
ARM:COUNt 1 ' Set arm count to 1.
TRIGger:SOURce IMMediate ' Set trigger control source Immediate.
TRIGger:COUNt 10 ' Set trigger count to 10.
READ? ' Trigger and return 10 readings.
External triggering
Input and output triggers are received and sent via the rear panel TRIGGER LINK connec-
tor. The trigger link has six lines. At the factory line #2 is selected for output triggers and
line #1 is selected for input triggers. These input/output assignments can be changed as
previously explained in this section. The connector pinout is shown in Figure 7-4.
Figure 7-4
Trigger link connection operation
876
54
3
21
Rear Panel Pinout
Pin Number
Description
1
2
3
4
5
6
7
8
Trigger Link 1
Trigger Link 2
Trigger Link 3
Trigger Link 4
Trigger Link 5
Trigger Link 6
Ground
Ground
Trigger Link

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)