testo 240 Bedienungsanleitung Seite 38

16
Cell c c onstant o o utside t t he r r ange 0 0 t t o 1 1 5 c c m
Error in measuring the cell constant in a solution of
a known conductivity
- Possible causes and • remedies:
- the solution was not at a temperature of
+25 °C/+75 °F.
• adapt temperature.
- the conductivity is not that of the value set
during calibration.
• reset the conductivity value of the test
solution in the instrument.
- the cell constant is > 15 cm
• use other measuring cells.
Internal i i nstrument e e rror
- Possible causes and • remedies:
- faulty measuring instrument.
• return instrument to Testo's service
department.
Error m m essages
ERROR 4 4 +7
-1 1
-1 .