wtw Multi 197i, Руководство по эксплуатации, Страница: 70 / 84

What to do if... Multi 197i
70 ba75339e04 07/2009
Measured value too low
Measured value too
high
6.3 Conductivity system messages
Error message
OFL
Error message
E3
Cause Remedy
– Insufficient flow – Provide flow to the sensor
Cause Remedy
– High amount of dissolved
substances
– Correct solubility function
using the salinity equivalent
– Air bubbles bump on the
membrane with high velocity
– Avoid direct flow to the
membrane
– The carbon dioxide pressure is
too high (> 1 bar)
– Measuring not possible
Cause Remedy
The measured value lies outside
the measuring range
– Measuring cell not connected – Connect measuring cell
– Cable broken – Replace measuring cell
Cause Remedy
– Measuring cell contaminated – Clean cell and replace it if
necessary
– Unsuitable calibration
solution
– Check calibration solutions