TESTO 240 - English

Contents
2
Instrument ddescription
.......................................................................3
Operation iinstructions
........................................................................5
Safety iinstructions
..............................................................................5
Instructions oof uuse
..............................................................................6
Connection of probe .................................................................6
Switching on the instrument ......................................................7
Auto off function........................................................................7
Storing the cell constant............................................................8
Setting the temperature coefficient............................................9
Conductivity mm
easurement
..............................................................10
HOLD function ........................................................................10
Determining tthe ccell cconstant
..........................................................11
Configuration
....................................................................................12
°C/°F conversion • Switching off the auto off function .............12
Care aand mmaintenance
.....................................................................13
General remarks......................................................................13
Battery replacement................................................................14
Error mmessages
.................................................................................15
ERROR 1-3.............................................................................15
ERROR 4+7 ............................................................................16
Techni
cal ddata
..................................................................................17
Instrument...............................................................................17
Conductivity measuring cells ...................................................18
Temperature probes................................................................18
Warranty .................................................................................18
Ordering ddata
....................................................................................19
Appendix
...........................................................................................19
Principle of meas. of the conductivity measuring cells ...............20
Temperature coefficients of selected solutions ........................21
Basic information on linear temperature compensation............22
Measuring iinstrument cconforms
with EEN 550 0081-11 ++ EEN 550 0082-11