3.4.3 Hydran 201 Sensor................................................................................................................. 31
3.4.4 CPU Module............................................................................................................................... 32
3.4.5 USB Type B Connector for Communication................................................................... 32
3.4.6 I/O Module ................................................................................................................................. 32
3.5 Analog Inputs and Output ................................................................................................................. 37
3.5.1 Analog Inputs............................................................................................................................ 37
3.5.2 Analog Output .......................................................................................................................... 37
3.6 Heating System .....................................................................................................................................38
3.7 Battery ...................................................................................................................................................... 38
3.7.1 Estimated Life........................................................................................................................... 38
3.7.2 Battery Specifications............................................................................................................ 39
3.7.3 Removing the Battery............................................................................................................ 39
3.7.4 Replacing the Battery ............................................................................................................ 40
3.7.5 Resetting the Clock................................................................................................................. 40
3.7.6 Discarding the Battery .......................................................................................................... 41
3.8 Internal Clock.......................................................................................................................................... 41
3.9 Nonvolatile Memory............................................................................................................................. 42
3.10 Additional Information ........................................................................................................................42
4HYDRAN 201CI CONTROLLERS ............................................................................................... 43
4.1 Hydran 201Ci-C Communications Controller ............................................................................. 43
4.1.1 Features...................................................................................................................................... 43
4.1.2 Description of Major Components .................................................................................... 44
4.1.3 Description of Circuit Board ................................................................................................ 45
4.1.4 Additional Information .......................................................................................................... 48
4.2 Hydran 201Ci-1 One Channel Controller...................................................................................... 48
4.2.1 Features...................................................................................................................................... 48
4.2.2 Description of Major Components .................................................................................... 50
4.2.3 Description of Circuit Board ................................................................................................ 52
4.2.4 Additional Information .......................................................................................................... 55
5HYDRAN 201TI DISPLAYS & MENUS ....................................................................................... 56
5.1 User Interface.........................................................................................................................................56
5.2 User Interface Operating Modes ..................................................................................................... 57
5.2.1 Unacknowledged Alarms Mode......................................................................................... 58
5.2.2 Main Display Mode ................................................................................................................. 58
