Chemtrac Auto Clean UV254, Owner'S Manual, Page: 29 / 41

Chemtrac UV254 Monitor
– UVM5000 v 2.1
Chemtrac, Inc. 28
14.1.2
Cleaning Fluid
Selecting an effective cleaning solution is essential for optimal performance. The following commercial cleaning
solutions and acids are readily available to remove common fouling agents.
Table 8: Commercial cleaning solutions
SOLUTION FOULING AGENTS
Lactic Acid <20% solution (CLR®)
Removes lime, calcium, rust, magnesium, and other dissolved
minerals
Sulfamic Acid <10% solution (Lime Away®)
Removes lime, calcium, rust, magnesium, and other dissolved
minerals
Phosphoric Acid <30% solution (Rust Off, Hagasen Blue) Removes lime, calcium, rust and color staining
Citric Acid <20% solution Removes mineral scaling
Sodium Hypochlorite <6% solution Removes oil, grease and biofilm
Acetic Acid <20% solution Removes oil and grease
Sulfuric Acid <10% solution Removes oil and grease
14.2
Cleaning Quartz Flow Cell
The optimal cleaning method for the UVM5000 is an automatic
scheduled clean with the Auto Clean System.
Without the Auto Clean System, cleaning of the quartz flow cell can be
performed using either the in-situ method or the manual method. The
in-situ method is recommended since it is much faster and easier and
just as effective.
Figure 14.4: UVA Mode - Inadequate cleaning Figure 14.3: UVA Mode - Effective cleaning