wtw inoLab 740, Operating Manual

Page: 245 / 274

What to do if...
245
Display
StirrerError
Measured value too
low
Measured value too
high
Cause Remedy
– Stirrer mechanically
blocked or defective
– Eliminate the blocking
or disconnect the
defective stirrer
– Disconnect, then
reconnect mains plug
Cause Remedy
– Insufficient flow – Provide flow to the probe
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