Instruction Manual

vi Rev. 3
Table of Contents
5 Remote Interface Reference ..................................................35
5.1 Serial Communication/Data Logger Option ...........................35
5.1.1 Serial port connector and cabling................................35
5.1.2 Command/return termination characters...................35
5.1.3 Serial Communication DIP Switch Settings...............36
5.1.4 Serial Command Set Reference ...................................38
5.2 IEEE-488 Communication Option ..........................................42
5.2.1 Command/return termination characters...................42
5.2.2 Communicating with the Model 185/186 ....................42
5.2.3 IEEE-488 Communication DIP Switch Settings ........44
5.2.4 IEEE-488 Command Set Reference ............................46
5.2.5 Serial poll status byte ..................................................49
5.3 Error Codes...............................................................................50
6 Virtual Instrument Operation .................................................51
6.1 RS-232 Virtual Instrument .....................................................51
6.1.1 Launching and initializing the RS-232 VI..................52
6.1.2 Interacting with the running VI..................................54
6.2 IEEE-488 Virtual Instrument .................................................55
6.2.1 Launching and initializing the GPIB VI.....................56
6.2.2 Interacting with the running VI..................................57
6.2.3 Running multiple GPIB devices ..................................58
7 Service Guide..........................................................................61
7.1 Troubleshooting Procedures ....................................................61
7.1.1 No level reading............................................................62
7.1.2 Erratic or erroneous level reading...............................63
7.1.3 Controller output does not energize ............................64
7.1.4 Unit not responding to communications .....................64
7.2 Custom Instrument Configurations ........................................65
7.2.1 Modifying the line voltage requirements ....................65
7.3 Additional Technical Support..................................................66
7.4 Return Authorization...............................................................66
Appendix..................................................................................67
A.1 4-20 mA current loop option ....................................................67
A.2 Auxiliary connector J2 pinout .................................................68
A.3 RS-232 cable DB-25 to DB-9 translation ................................69
A.4 RS-422 Cable Wiring................................................................69
A.5 Dielectric constants for common liquids .................................70
Index.........................................................................................71