Fill The Probe - Hach PHC705 User Manual

Contamination
Proteins
Wastewater and
organic compounds
Blockage of porous
pin/diaphragm
reference junctions

8.2 Fill the probe

Add electrolyte filling solution to the probe regularly to make sure that the electrolyte flows from the
probe to the sample. Refer to
Note: If the dispensing tip becomes clogged, remove the dispensing tip and soak the tip in warm water. Then, fully
dry and assemble the tip again.
Figure 4 Fill the probe
12 English
Table 1 Cleaning solution (continued)
Cleaning solution
Electrode cleaning solution
for proteins/organic
contamination
Electrode cleaning solution,
extra strong
Electrode cleaning solution
for porous pin/diaphragm
reference junctions
Figure 4. Make sure to use the correct filling solution (saturated KCl).
Active component
Pepsin in HCl
Sodium hypochlorite
Thiourea
Soak time
3 hours maximum
5–10 minutes
3 hours with stirring
or until the porous
plug becomes white