Wavelength Electronics LFI-3751, User Manual

Page: 12 / 132

12
T
a
b
le of Contents
Chapter 4: Remote Interface Reference ....................................................... 75
RS-232 Interface Confi guration...........................................................................................77
RS-232 Command and Response Packet Formats ...........................................................80
Standard Command Code Listing .....................................................................................82
Calibration Command Code Listing ..................................................................................85
Diagnostic Command Code Listing...................................................................................86
End Code Listing..................................................................................................................87
Starting RS-232 Communication with the LFI-3751 ..........................................................89
Confi guring the Sensor .......................................................................................................90
Measuring Actual Temperature or Resistance...................................................................94
Setting the Limit Currents ...................................................................................................95
Setting Temperature Limits .................................................................................................96
Autotune PID & Setting the P, I, and D Constants .............................................................97
Setting Temperature Setpoint..............................................................................................99
Setting Resistance Setpoint................................................................................................100
Enabling and Disabling the Output Current ......................................................................101
Measuring Thermoelectric Current and Voltage ................................................................102
Measuring Auxiliary Sensor Temperature..........................................................................103
Setting Gain for Analog Input Signal (Rear Panel BNC Connector) ................................104
Checking the Alarm Status..................................................................................................105
Halting the Processor ..........................................................................................................106
Reverting to LOCAL Mode...................................................................................................107
Entering the PASSWORD.....................................................................................................108
Reading Serial & Model Numbers, Firmware Version .......................................................109
Calibration - Sensor Bias Current and AD590 Sense Resistance ...................................110
Calibration - ACT T, TE I, TE V uncalibrated voltages ........................................................112
Calibration - Measurement Slopes & Offsets ....................................................................113
Calibration - SET T Slopes & Offsets..................................................................................115
Calibration - TE Limit Current Slopes & Offsets................................................................116
RESTORE Calibration Defaults ...........................................................................................117
Diagnostic - Lamp Control ..................................................................................................118
Diagnostic - Switch Status ..................................................................................................119
Diagnostic - Digi-Pot Status ................................................................................................120
End Code Reference ............................................................................................................121
Calculating FCS....................................................................................................................123
Example BASIC Control Program for IBM PC Compatible Machines..............................124
Chapter 5: Specifi cations .............................................................................. 127
General Specifi cations.........................................................................................................129
Electrical Specifi cations ......................................................................................................129
Mechanical Specifi cations...................................................................................................130
Appendix:
CAT-220 Cable Accessory Diagram ......................................................... 133