Monitor The Rejection Flow Rate; Monitor The Water Hardness; Monitor The Chlorine - Wasserlab Micromatic Mode D'emploi

12.4 Monitor the rejection flow rate

Follow the instructions below to calculate the rejection flow rate:

Disconnect the rejection tube (drainage tube) and measure the time in seconds (t) needed to fill 100 mL of a
test tube.

Calculate the rejection flow rate in L/h: Rejection flow rate (L/h)=360/t.

The rejection flow rate should be 36 l/h.

A rejection flow rate below 36 L/h with a correct inlet pressure indicates the flow restrictor is blocked.

12.5 Monitor the water hardness

The feed water hardness can vary throughout the year, so it is recommended to measure it several times a year.
A water softener to prevent the formation of lime precipitates in the system is needed when the feed water hardness
exceeds 300 ppm of CaCO .
3

12.6 Monitor the chlorine

It is recommended to measure the absence of chlorine in the rejection water several times a year (qualitative method).
The presence of chlorine in the rejection water indicates the exhaustion of the pretreatment.
Table 12.1.
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