Soak Procedure For Dry Probes; Remove Or Install The Shroud - Hach PHC101 User Manual

Figure 3 Soaking depth for open junction probes
Contamination
General
contamination
Minerals
Fats, grease and oils
Proteins
Wastewater and
organic compounds

8.2 Soak procedure for dry probes

If the glass bulb becomes dry, complete the steps that follow to hydrate the probe.
1. Soak the probe tip in pH 4 and pH 7 buffer solutions for 5 minutes in each solution.
2. Rinse the probe with deionized water. Blot dry with a lint-free cloth.
3. Calibrate the probe.

8.3 Remove or install the shroud

Remove the shroud on the rugged probe during calibration and maintenance. Refer to
Keep the shroud installed on the rugged probe during sample measurements to prevent damage to
the sensor. Refer to Figure
Table 1 Cleaning solution
Cleaning solution
Electrode cleaning solution for
regular maintenance
Electrode cleaning solution for
minerals/inorganic
contamination
Electrode cleaning solution for
fats, oils and grease
contamination
Electrode cleaning solution for
proteins/organic
contamination
Electrode cleaning solution,
extra strong
5.
Active component
™
KATHON CG,
®
DECONEX 11
Phosphoric acid
(~10%)
™
KATHON CG,
®
TRITON X
Pepsin in HCl
Sodium hypochlorite
Soak time
12–16 hours
10–15 minutes
2 hours maximum
3 hours maximum
5–10 minutes
Figure 4.
English 11