Keithley 2001-TCSCAN User Manual

3 Operation
3.1 Introduction ......................................................................................................................................................... 3-1
3.2 Signal limitations................................................................................................................................................. 3-2
3.3 Scanner card detection......................................................................................................................................... 3-2
3.3.1 Power-up detection...................................................................................................................................... 3-2
3.3.2 Scanner option bus query ............................................................................................................................ 3-2
3.4 Front panel scanner controls................................................................................................................................ 3-2
3.4.1 Open and close channels (CHAN) .............................................................................................................. 3-2
3.4.2 Configure channels (CONFIG-CHAN)....................................................................................................... 3-4
3.4.3 Scan configuration (CONFIG-SCAN) ........................................................................................................ 3-5
3.4.4 Using SCAN to configure scan parameters and start scanning................................................................... 3-5
3.4.5 Using EXIT to stop scanning ...................................................................................................................... 3-6
3.4.6 Manual scanning.......................................................................................................................................... 3-6
3.5 IEEE-488 bus scanner commands............................................................................................................... 3-6
3.6 Closing and opening channels............................................................................................................................. 3-9
3.6.1 Closing channels.......................................................................................................................................... 3-9
3.6.2 Opening channels ........................................................................................................................................ 3-9
3.7 Scanning channels ............................................................................................................................................... 3-9
3.7.1 Front panel scanning.................................................................................................................................... 3-9
3.7.2 IEEE-488 bus scanning ............................................................................................................................. 3-10
3.8 Temperature measurements............................................................................................................................... 3-11
3.8.1 Thermocouple temperature measurements................................................................................................ 3-11
3.8.2 RTD temperature measurements............................................................................................................... 3-13
3.8.3 Using RTD and thermocouple sensors together........................................................................................ 3-14
3.8.4 IEEE-488 programming example (temperature measurements)............................................................... 3-15
3.9 Basic front panel operation................................................................................................................................ 3-18
3.9.1 Configure stepping and scanning .............................................................................................................. 3-18
3.9.2 Open and close channels ............................................................................................................................3-19
3.9.3 Start stepping or scanning ..........................................................................................................................3-20
3.10 Temperature measurements............................................................................................................................... 3-20
3.10.1 Temperature measurement configuration...................................................................................................3-21
3.10.2 Temperature measurement procedure ........................................................................................................3-21
3.11 Remote operation............................................................................................................................................... 3-21
3.11.1 IEEE-488 programming example (temperature measurements)................................................................3-23
3.12 Typical applications........................................................................................................................................... 3-25
3.12.1 Resistor testing .......................................................................................................................................... 3-25
3.12.2 Resistor temperature coefficient testing.................................................................................................... 3-28
3.13 Measurement considerations ............................................................................................................................. 3-30
3.13.1 Thermocouple measurement error sources................................................................................................ 3-30
3.13.2 Path isolation ............................................................................................................................................. 3-31
3.13.3 Channel resistance..................................................................................................................................... 3-31
3.13.4 Magnetic fields.......................................................................................................................................... 3-31
3.13.5 Electromagnetic Interference (EMI).......................................................................................................... 3-32
3.13.6 Ground loops ............................................................................................................................................. 3-32
3.13.7 Keeping connectors clean.......................................................................................................................... 3-33
ii

Keithley 2001-TCSCAN Specifications

General

Brand	Keithley
Model	2001-TCSCAN
Category	Test Equipment
Language	English