Operator`s manual

LIST OF FIGURES
LF-2
PAGE
13. 21X MEASUREMENTS
13.1-1 Timing of Single-Ended Measurement................................................................................. 13-1
13.2-1 Differential Voltage Measurement Sequence....................................................................... 13-2
13.3-1 Input Voltage Rise and Transient Decay.............................................................................. 13-3
13.3-2 Typical Resistive Half Bridge................................................................................................ 13-4
13.3-3 Source Resistance Model for Half Bridge Connected to the 21X ........................................ 13-4
13.3-4 Wire Manufacturers Capacitance Specifications, C
w
........................................................... 13-5
13.3-5 Model 024A Wind Direction Sensor ..................................................................................... 13-5
13.3-6 Resistive Half Bridge Connected to Single-Ended 21X Input .............................................. 13-6
13.3-7 Half Bridge Configuration for YSI #44032 Thermistor Connected to 21X.......................... 13-10
13.3-8 Measuring Input Settling Error with the 21X....................................................................... 13-10
13.3-9 Incorrect Lead Wire Extension on Model 107 Temperature Sensor.................................. 13-10
13.4-1 Thermistor Polynomial Error .............................................................................................. 13-11
13.4-2 Diagram of Junction Box.................................................................................................... 13-15
13.5-1 Circuits Used with Instructions 4-9..................................................................................... 13-16
13.5-2 Excitation and Measurement Sequence for 4 Wire Full Bridge ......................................... 13-17
13.6-1 AC Excitation and Measurement Sequence for AC Half Bridge ........................................ 13-19
13.6-2 Model of Resistive Sensor with Ground Loop .................................................................... 13-19
14. INSTALLATION AND MAINTENANCE
14.3-1 21X Battery Pack and Panel ................................................................................................ 14-2
14.6-1 Connecting Vehicle Power Supply to 21X............................................................................ 14-4
14.7-1 Relay Driver Circuit with Relay............................................................................................. 14-5
14.7-2 Power Switching without Relay ............................................................................................ 14-5
14.10-1 Calibration Points for the 21X .............................................................................................. 14-8
14.10-2 21X CPU Board.................................................................................................................... 14-9
APPENDIX E. CHANGING RAM OR PROM CHIPS
E-1 Memory Sockets on CPU Board ............................................................................................ E-1