Instructions

UM-0085-B09 DT80 Range User Manual Page 11
RG
External Power .......................................................................................................................................... 287
Internal Power ........................................................................................................................................... 288
Power Outputs .......................................................................................................................................... 290
Signal Output ............................................................................................................................................ 291
Internal Memory-Backup Battery ............................................................................................................... 291
Monitoring DT80 Power ............................................................................................................................ 292
Power Consumption ............................................................................................. 292
Power Consumption .................................................................................................................................. 292
Battery Life ................................................................................................................................................ 297
Minimising Power Consumption ................................................................................................................ 298
Sleep Mode ............................................................................................................ 300
About Sleep Mode .................................................................................................................................... 300
Wake Events ............................................................................................................................................. 300
Controlling Sleep ....................................................................................................................................... 300
Forced Sleep Mode ................................................................................................................................... 301
Part O – Sensors & Channels ................................................................. 302
Analog Channels ................................................................................................... 302
About the Analog Input Terminals ............................................................................................................. 302
Voltage ...................................................................................................................................................... 303
Current ...................................................................................................................................................... 306
4–20mA Current Loops ............................................................................................................................. 308
Resistance ................................................................................................................................................ 308
Bridges ...................................................................................................................................................... 311
Temperature – Thermocouples ................................................................................................................. 315
Temperature – Thermistors ....................................................................................................................... 317
Temperature – RTDs ................................................................................................................................ 319
Temperature – AD590 Series IC Sensors ................................................................................................. 319
Temperature – LM35 Series IC Sensors ................................................................................................... 321
Temperature – LM135 Series IC Sensors ................................................................................................. 322
Humidity Sensors ...................................................................................................................................... 323
Frequency ................................................................................................................................................. 323
Strain Gauges – Bridge ............................................................................................................................. 324
Strain Gauges – Vibrating Wire ................................................................................................................. 325
Strain Gauges – Carlson Meter ................................................................................................................. 327
Digital Channels .................................................................................................... 331
About the Digital I/O Channels .................................................................................................................. 331
Digital Inputs ............................................................................................................................................. 332
Digital Outputs .......................................................................................................................................... 333
Counters – Low Speed .............................................................................................................................. 337
Counters – High Speed ............................................................................................................................. 338
Phase Encoders ........................................................................................................................................ 340
Examples – Digital and Counters .............................................................................................................. 341
SDI-12 Channel ...................................................................................................... 342
About SDI-12 ............................................................................................................................................ 342
Testing and Configuring an SDI-12 Device ............................................................................................... 343
Reading Data from SDI-12 Devices .......................................................................................................... 343
Example .................................................................................................................................................... 345
Other Considerations ................................................................................................................................ 346
Troubleshooting ........................................................................................................................................ 346
Generic Serial Channel ......................................................................................... 348
Connecting to and Configuring the Serial Port .......................................................................................... 348
Serial Channel Commands ....................................................................................................................... 348
Serial Channel Operation .......................................................................................................................... 349