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Table of Contents
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Ratiometric Accuracy ...................................................... 30
Current Measurements – Details ................................................ 30
Voltage Ranges for Current Measurements ..................... 31
0-20 mA and 4-20 mA Measurements ............................. 31
Pulse Measurements – Details ........................................................... 33
Period Averaging – Details ............................................................... 34
Digital Input/Ouput – Details ............................................................ 34
Communication – Details .................................................................. 34
Communication Ports ................................................................. 34
USB Port .......................................................................... 35
RS-232 Port ..................................................................... 35
SDI-12 Ports .................................................................... 35
General Serial Communications ................................................. 35
SDI-12 Communications ............................................................ 35
Modbus Communications .......................................................... 36
DNP3 Communications ............................................................. 36
PakBus Communications ........................................................... 36
Internet Communications ........................................................... 37
Grounding – Details .......................................................................... 37
Lightning Protection ................................................................... 38
Power In ..................................................................................... 39
Power Sources ................................................................. 39
Power LED Indicator ....................................................... 40
Calculating Power Consumption ..................................... 40
Power Out .................................................................................. 40
Data Storage ............................................................................... 41
CPU Drive .................................................................................. 42
Time Keeping .................................................................................... 42
Specifications ........................................................... 42
Voltage Measurements – Specifications............................................ 42
Resistance Measurements – Specifications ....................................... 44
Voltage Excitation – Specifications .................................................. 45
Current Measurements – Specifications ............................................ 45
Pulse Measurements – Specifications ............................................... 45
Switch-Closure Input ................................................................. 45
High-Frequency Input ................................................................ 46
Low-Level AC Input .................................................................. 46
Period Averaging – Specifications .................................................... 46
Digital Input/Output – Specifications ................................................ 47
Switched Voltage Output – Specifications ........................................ 47
Pulse-Width Modulation – Specifications ......................................... 48
Communication – Specifications ....................................................... 48
System – Specifications..................................................................... 48
Power Requirements – Specifications ............................................... 49
Compliance – Specifications ............................................................. 49
Physical – Specifications ................................................................... 49
RF407, RF412, and RF422 Radio Options – Specifications ............. 50
Maintenance ............................................................. 50
Sending an Operating System ........................................................... 51
Summary of Contents for CR300 series
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