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
Summary of Contents for 2001-TCSCAN
Page 1: ...Contains Operating and Servicing Information Model 2001 TCSCAN Scanner Card Instruction Manual...
Page 63: ...Operation 3 34...
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