32-Bit floating point 90
7.2.8 Modbus tips and troubleshooting 90
7.2.8.1 Error codes 90
Result code -01: illegal function 90
Result code -02: illegal data address 91
Result code -11: COM port error 91
7.3 Internet communications 91
7.3.1 IPaddress 92
7.3.2 HTTPS 92
7.4 DNP3 communications 92
7.5 Serial peripheral interface (SPI) and I2C 93
7.6 PakBus communications 93
7.7 SDI-12 communications 94
7.7.1 SDI-12 transparent mode 94
7.7.1.1 SDI-12 transparent mode commands 95
7.7.2 SDI-12 programmed mode/recorder mode 96
7.7.3 Programming the datalogger to act as an SDI-12 sensor 96
7.7.4 SDI-12 power considerations 97
8. Maintaining your datalogger 99
8.1 Datalogger calibration 99
8.1.1 About background calibration 100
8.2 Datalogger security 100
8.2.1 Security codes 102
8.2.2 Creating a .csipasswd file 103
8.2.2.1 Command syntax 104
8.3 Datalogger enclosures 104
8.4 Internal battery 105
8.4.1 Replacing the internal battery 106
8.5 Electrostatic discharge and lightning protection 107
8.6 Power budgeting 108
8.7 Updating the operating system 109
8.7.1 Sending an operating system to a local datalogger 110
8.7.2 Sending an operating system to a remote datalogger 110
9. Tips and troubleshooting 112
9.1 Checking station status 113
Table of Contents - v
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