Contents
1. Introduction.............................................................................................. 2
1.1 901-PH Display and Controls............................................................................2
1.2 901-PH Rear Panel Connectors..........................................................................2
1.3 901-PH Front Panel...........................................................................................3
1.4 Unpacking Information .....................................................................................4
1.5 Specifications....................................................................................................5
2. Operating Modes......................................................................................6
3. pH Calibration ..........................................................................................7
3.1 Calibration Procedure........................................................................................7
3.2 Calibration Notes ..............................................................................................8
3.3 Calibration Messages ........................................................................................9
4. mV Calibration........................................................................................ 10
5. Temperature Calibration........................................................................ 10
5.1 Calibration Procedure......................................................................................10
5.2 Calibration Notes ............................................................................................11
5.3 Calibration Messages ......................................................................................11
5.4 Manual Temperature Setting ...........................................................................12
6. RS232 Port.............................................................................................. 13
6.1 Setting the Baud Rate......................................................................................13
6.2 Sending Readings to the RS232 Port................................................................13
6.3 RS232 Configuration ......................................................................................14
6.4 Communication and Statistical Software..........................................................14
6.5 Commands......................................................................................................14
6.6 Data Format....................................................................................................15
7. Recorder Output Option ........................................................................ 16
7.1 RS232 / Recorder Output Socket Connections .................................................16
8. Selecting Buffers for Automatic Buffer Recognition............................ 17
9. Initialising the 901-PH............................................................................ 18
10. Troubleshooting..................................................................................... 19
10.1 General Error Messages ..............................................................................19
10.2 pH and mV Troubleshooting .......................................................................20
10.3 Temperature Troubleshooting......................................................................21
11. Appendices............................................................................................. 22
11.1 pH Sensor Fundamentals.............................................................................22
11.2 Polarisation Output Connector.....................................................................24
11.3 Guard Connector.........................................................................................25
11.4 Checking the reference junction of a pH sensor............................................25
11.5 Determining if an instrument or sensor is faulty...........................................26
12. Warranty ................................................................................................. 27
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