Verification Procedure; Section 8 Maintenance; Clean The Probe - Hach CDC401 Series User Manual

7.1 Verification procedure

1. Go to the
verification menu.
The display shows
the standard solution
to use for
verification.
Note: Menu name for
HQd meters: Run check
standard.
5. Shake the probe
from side to side to
remove air bubbles.

Section 8 Maintenance

8.1 Clean the probe

Clean the probe regularly to remove mineral or sample buildup on the electrodes. Symptoms of
contamination:
• Incorrect or irregular readings
• Slow stabilization times
• Calibration errors
• Sample material stays on the probe
1. Rinse the probe with deionized water. Dry the probe body with a lint-free cloth.
Note: Remove the shroud on a rugged probe before cleaning. Install the shroud after the probe is clean. Refer
to Remove or install the shroud
2. Soak the probe in the applicable cleaning solution for the specified time. Refer to
3. Rinse or soak the probe for 1 minute in deionized water. Dry the probe body with a lint-free cloth.
8 English
2. Pour the fresh
standard solution
into a beaker.
6. Stir gently, then
read the conductivity
value of the standard
solution. The meter
accepts or rejects
the result.
on page 9.
3. Rinse the probe
with deionized water.
Dry the probe with a
lint-free cloth.
4. Put the probe in
the standard solution
with the sensor fully
in the solution. Do
not put the probe on
the bottom or sides
of the beaker.
Table 1.