testo 252 Bedienungsanleitung Seite 74

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Warning
.......................................................................4
General description .........................................................5
Instrument description .....................................................6
User Instructions
Power supply
Battery/rech. battery connection ...........................7
Battery life .......................................................8
Charging the rech. battery...............................8
Operation with mains unit .................................... 9
Connection of probes ..................................................9
Configuration menu ...................................................10
Parallel measurements...............................................13
pH measurement
Preparing a pH electrode...........................................15
Calibrating a pH electrode .........................................16
automatic calibration
with specified buffer solutions .............................16
manual calibration
with any chosen buffer solutions .........................22
Measuring..................................................................26
Automatic stability recognition
of the measuring signal ..............................................28
Response times and temperature compensation .......29
pH error messages ...................................................30
Other possible malfunctions................................32
Redox measurement ......................................................33
Conductivity measurement
Preparing a conductivity measurement
Storing cell constants..........................................34
Setting a temperature coefficient.........................36
Measuring..................................................................37
Theory .....................................................................38
Conductivity error messages .....................................40
Temperature measurement ...........................................41
Display variations ...........................................................42
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