YSI TruLine 21 - Manual (Page 8)

8 T 814240 04/2014
Maintenance and cleaning TruLine
Maintenance and cleaning
Cleaning Remove water-soluble contamination by rinsing with deionized water. Other
types of contamination have to be removed as follows while the contact time
with the detergents should be kept as short as possible:
Contamination Cleaning procedure
Fat and oil Rinse with water containing household
washing-up liquid
Lime and hydroxide deposits Rinse with citric acid (10 % by weight)
Note
Hydrofluoric acid, hot phosphoric acid and strong alkaline solutions destroy
the glass membrane.
After cleaning Rinse the combination electrode with deionized water and condition it in
reference electrolyte solution for at least 1 hour. Then recalibrate the combi-
nation electrode.
Wear parts and accessories
Description Model Order no.
Reference electrolyte solution 250 mL
(KCl 3 mol/L, Ag
+
free)
KCl-250 109 705Y