Operation
Liquitrend QMW43
18
Hauser
• A very low residual conductivity in the single-digit µS/cm range is indicative of a film of
water that has not drained due to the sensor installation.
• If the residual conductivity value is far higher, this indicates fluid or cleaning agent
residue.
[ s/cm]
μ
OU2
OU1
t
0
10
⁴
9.5
t
0
[mm]
1.
2.
3.
4.
5.
6.
7.
7.
1.
3.
5.
2.
4.
6.
A0041350
10
Application example: tank cleaning
Description of the graphic "Application example: tank cleaning"
At the end of a production run:
1. Tank is emptied.
Considerable product residue in the tank.
Signal OU1: buildup ≥ 1 mm
Signal OU2: conductivity < conductivity of medium when tank is filled
2. Perform cleaning in place (CIP); rinse, e.g. with water.
3. Tank is emptied.
Product residue still in the tank.
Signal OU1: buildup ≥ 0.1 mm
Signal OU2: conductivity < measured values from point 1, but > 0 µS/cm
4. Clean or rinse again.
5. Tank is emptied.
Product residue still in the tank.
Signal OU1: buildup ≥ 0.1 mm
Signal OU2: conductivity < measured values from point 1, but > 0 µS/cm
6. Clean or rinse again.
