Xylem MULTI 1970I PORTABLE MULTIPARAMETER METERS - Manual (Page 72)

What to do if... Multi 1970i
70
Measured value too low
Measured value too
high
6.3 Conductivity system messages
Error message
OFL OFL OFL OFL
Error message
E3 E3 E3 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