Metrohm 781 pH/Ion Meter - Manual (Page 5)

Contents
780/781 pH/Ion Meter, Manual
I
Table of contents
1 Introduction .......................................................... 1
1.1 Instrument description ................................................................................. 1
1.2 Parts and controls ........................................................................................ 3
1.3 Information about this Manual ..................................................................... 5
1.3.1 Notation and pictograms ......................................................................... 5
1.4 Safety information ........................................................................................ 6
1.4.1 Electrical safety ........................................................................................ 6
1.4.2 General handling rules ............................................................................. 6
2 Installation ........................................................... 7
2.1 Instrument setup .......................................................................................... 7
2.1.1 Packaging ................................................................................................. 7
2.1.2 Checks ...................................................................................................... 7
2.1.3 Location .................................................................................................... 7
2.2 Connecting the accessories ........................................................................ 8
2.3 Connecting optional devices ....................................................................... 9
2.3.1 Connecting the 801 Magnetic Stirrer ....................................................... 9
2.3.2 Connecting the 802 Rod Stirrer ..............................................................10
2.3.3 Connecting a Dosimat Plus (only 781) ..................................................11
2.3.4 Connecting a sample changer ...............................................................12
2.3.5 Connecting a printer ...............................................................................13
2.3.6 Connecting a computer .........................................................................15
2.4 Connecting the electrodes and sensors ................................................... 16
2.5 Mains connection ....................................................................................... 17
2.6 Switch on .................................................................................................... 17
2.7 Initial configuration .................................................................................... 18
3 Short operating tutorial ..................................... 19
3.1 pH measurement ........................................................................................ 19
3.1.1 Requirements .........................................................................................19
3.1.2 Preparations ...........................................................................................19
3.1.3 pH calibration .........................................................................................20
3.1.4 pH measurement ....................................................................................22
3.2 Determination of an ion concentration (only 781: Conc mode) ............... 23
3.2.1 Requirements .........................................................................................23
3.2.2 Preparations ...........................................................................................23
3.2.3 Calibrating the fluoride ISE .....................................................................24
3.2.4 Direct measurement of fluoride ..............................................................28
4 Operation ........................................................... 31
4.1 The keypad ................................................................................................. 31
4.2 Operating concept ..................................................................................... 32
4.3 All key functions at a glance ...................................................................... 33
4.4 Operating principles .................................................................................. 38
4.4.1 Configuration and method parameters .................................................38
4.4.2 Editing menu entries ..............................................................................38
4.4.3 Entering text ............................................................................................39