Contents
1. INTRODUCTION...................................................................................................2
1.1 MC-81 Display and Controls ......................................................................................................2
1.2 Unpacking Information................................................................................................................4
1.3 Specifications..............................................................................................................................5
2. DISPLAY FORMATS AND READOUT MODES.....................................................6
2.1 Display Formats..........................................................................................................................6
2.2 Readout Modes for Dual Display format....................................................................................6
2.3 Readout Modes for Large Display format..................................................................................7
3. CONDUCTIVITY CALIBRATION ...........................................................................8
3.1 Calibration Procedure.................................................................................................................8
3.2 Conductivity Calibration Notes...................................................................................................9
3.3 Conductivity Calibration Messages............................................................................................9
4. SALINITY CALIBRATION ...................................................................................10
4.1 Calibration Procedure...............................................................................................................10
4.2 Salinity Calibration Notes .........................................................................................................11
4.3 Salinity Calibration Messages..................................................................................................11
5. PH CALIBRATION..............................................................................................12
5.1 Calibration Procedure...............................................................................................................12
5.2 pH Calibration Notes ................................................................................................................13
5.3 pH Calibration Messages .........................................................................................................13
6. TEMPERATURE CALIBRATION.........................................................................14
6.1 Temperature Calibration...........................................................................................................14
6.2 Calibration Notes......................................................................................................................14
6.3 Calibration Messages...............................................................................................................15
6.4 Manual Temperature Setting....................................................................................................15
7. BATTERY SAVER FUNCTION............................................................................16
8. SELECTING BUFFERS FOR AUTO BUFFER RECOGNITION............................17
9. INITIALISING THE MC-81...................................................................................18
10. TROUBLESHOOTING ....................................................................................19
10.1 General Error Messages .....................................................................................................19
10.2 Conductivity and Salinity Troubleshooting..........................................................................20
10.3 pH and mV Troubleshooting ...............................................................................................22
10.4 Temperature Troubleshooting.............................................................................................23
11. WARRANTY ...................................................................................................24
12. APPENDICES.................................................................................................26
12.1 Soil Salinity Information.......................................................................................................26
12.2 pH, Conductivity & Salinity Measurement of Soil & Potting Mix. .......................................28
12.3 Water Classification Types..................................................................................................30
12.4 Care, Cleaning and Maintenance of Conductivity Electrodes............................................31
12.5 Replatinising Conductivity Electrodes.................................................................................32
12.6 pH Electrode Fundamentals................................................................................................33
12.7 Checking the reference junction of a pH electrode. ...........................................................35
12.8 Determining if an instrument or pH electrode is faulty .......................................................36
12.9 Instrument software version number. .................................................................................36
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