Keithley 2450 User Manual

Model 2450
Interactive SourceMeter® Instrument Reference Manual Section 3:
Functions and features
2450-901-01 Rev. B/September 2013 3-77
-- Block 6: Turn SMU output OFF
trigger.model.setblock(6, trigger.BLOCK_SOURCE_OUTPUT, smu.OFF)
-- Block 7: Check if 80<=R<=120; if yes, go to Block 10
trigger.model.setblock(7, trigger.BLOCK_BRANCH_LIMIT_CONSTANT,
trigger.LIMIT_INSIDE, 80, 120, 10, 5)
-- Block 8: Set digital I/O lines 1-4; output decimal 15 (binary 1111) to component
handler
trigger.model.setblock(8, trigger.BLOCK_DIGITAL_IO, 15, 15)
-- Block 9: Go to Block 20
trigger.model.setblock(9, trigger.BLOCK_BRANCH_ALWAYS, 20)
-- Block 10: Check if 90<=R<=110; if yes, go to Block 13
trigger.model.setblock(10, trigger.BLOCK_BRANCH_LIMIT_CONSTANT,
trigger.LIMIT_INSIDE, 90, 110, 13, 5)
-- Block 11: Set digital I/O lines 1-4; output decimal 1 (binary 0001) to component
handler
trigger.model.setblock(11, trigger.BLOCK_DIGITAL_IO, 1, 15)
-- Block 12: Go to Block 20
trigger.model.setblock(12, trigger.BLOCK_BRANCH_ALWAYS, 20)
-- Block 13: Check if 95<=R<=105; if yes, go to Block 16
trigger.model.setblock(13, trigger.BLOCK_BRANCH_LIMIT_CONSTANT,
trigger.LIMIT_INSIDE, 95, 105, 16, 5)
-- Block 14: Set digital I/O lines 1-4; output decimal 2 (binary 0010) to component
handler
trigger.model.setblock(14, trigger.BLOCK_DIGITAL_IO, 2, 15)
-- Block 15: Go to Block 20
trigger.model.setblock(15, trigger.BLOCK_BRANCH_ALWAYS, 20)
-- Block 16: Check if 99<=R<=101; if yes, go to Block 19
trigger.model.setblock(16, trigger.BLOCK_BRANCH_LIMIT_CONSTANT,
trigger.LIMIT_INSIDE, 99, 101, 19, 5)
-- Block 17: Set digital I/O lines 1-4; output decimal 3 (binary 0011) to component
handler
trigger.model.setblock(17, trigger.BLOCK_DIGITAL_IO, 3, 15)
-- Block 18: Go to Block 20
trigger.model.setblock(18, trigger.BLOCK_BRANCH_ALWAYS, 20)
-- Block 19: Set digital I/O lines 1-4; output decimal 4 (binary 0100) to component
handler
trigger.model.setblock(19, trigger.BLOCK_DIGITAL_IO, 4, 15)
-- Block 20: Delay 1ms; controls duration of digital bit patterns; adjust as
appropriate
trigger.model.setblock(20, trigger.BLOCK_DELAY_CONSTANT, 0.001)
-- Block 21: Set digital I/O lines 1-4; output decimal 0 (binary 0000) clear
pattern to component handler
trigger.model.setblock(21, trigger.BLOCK_DIGITAL_IO, 0, 15)
-- Block 22: Notify block generates event, which causes output of a trigger pulse
on digital I/O line 6
trigger.model.setblock(22, trigger.BLOCK_NOTIFY, trigger.EVENT_NOTIFY1)
-- Block 23: Loop back to Block 2; keep looping until all resitors have been tested
trigger.model.setblock(23, trigger.BLOCK_BRANCH_COUNTER, number_of_resistors, 2)
-- After executing all of the above commands the trigger model can be initiated by
executing "trigger.model.initiate()"

Keithley 2450 Specifications

General

Model	2450
Category	SourceMeter
Voltage Source Range	±200 V
Current Source Range	±1 A
DC Voltage	200 V
DC Current	1 A
Power Output	20 W
Resolution	6.5 digits
Display	5-inch capacitive touchscreen
Operating Temperature	0°C to 50°C
Connectivity	USB, LAN, GPIB
Dimensions	213 mm × 88 mm × 370 mm