3
9. Notepad Function ................................................................................... 29
9.1 Recording Readings into the Notepad................................................................................ 29
9.2 Recalling Readings from the Notepad ............................................................................... 29
9.3 Erasing Records from the Notepad .................................................................................... 30
9.4 Printing Records from the Notepad to the RS232 Port ....................................................... 30
10. Automatic Datalogging .......................................................................... 31
11. RS232 Port............................................................................................... 33
11.1
Setting the Baud Rate .................................................................................................... 33
11.2
Sending Readings to the RS232 Port ............................................................................. 33
11.3
RS232 Configuration..................................................................................................... 33
11.4
Communication and Statistical Software........................................................................ 33
11.5
Commands .................................................................................................................... 34
11.6
Data Format .................................................................................................................. 35
11.7
GLP Data Format .......................................................................................................... 36
11.8
RS232 Port Connections................................................................................................ 36
12. Recorder Port .......................................................................................... 37
12.1
Recorder Port Configuration in Specific Ion Mode ........................................................ 37
12.2
Recorder Port Configuration in pH Mode ...................................................................... 39
12.3
Recorder Port Configuration in Absolute or Relative mV Modes ................................... 39
12.4
Recorder Port Specifications.......................................................................................... 40
12.5
Recorder Port Connections ............................................................................................ 40
13. Setting the Clock..................................................................................... 41
14. Initialising the 900-I3 .............................................................................. 42
15. Instrument firmware version number................................................... 42
16. Troubleshooting...................................................................................... 43
16.1
General Errors ............................................................................................................... 43
16.2
Specific Ion, pH and mV Troubleshooting ..................................................................... 43
16.3
Temperature Troubleshooting........................................................................................ 44
17. Appendices.............................................................................................. 45
17.1
pH Electrode Fundamentals ........................................................................................... 45
17.1.1
Asymmetry of a pH Electrode ..............................................................................................................45
17.1.2
Slope of a pH Electrode.......................................................................................................................46
17.1.3
Temperature Compensation.................................................................................................................46
17.2
Guard Connector ........................................................................................................... 46
17.3
Polarisation Connector .................................................................................................. 47
17.4
Checking the reference junction of a pH electrode ......................................................... 47
17.5
Determining if an instrument or pH electrode is faulty................................................... 47
18. Warranty................................................................................................... 48