Hach PHC729, Руководство пользователя

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Section 9 Troubleshooting
Problem Possible cause Solution
Decreased probe performance
causes slow stabilization and
prevents accurate calibrations or
measurements.
The glass sensor is dirty. Clean and condition the probe.
Refer to
Clean the probe
on page 11.
The reference junction is
clogged. Clean and condition the probe.
Refer to
Clean the probe
on page 11.
The filling solution has
contamination. Replace the filling solution.
Refer to
Replace the filling
solution on page 14.
The probe is not conditioned
to the sample sufficiently. Condition the probe. Refer to
Preparation for use on page 5.
The glass sensor has
become dry. Soak the probe tip in buffer
solutions. Refer to
Soak
procedure for dry probes
on page 15.
The calibration slope of the
probe has changed. Increase the accepted slope limit
settings if possible, or contact
technical support.
Sample properties cause slow
stabilization or inaccurate
measurements.
The sample temperature is
low, or there is a large
temperature difference
between samples. Increase the sample
temperature or adjust the
temperature of different samples
to be the same (within 2 °C
(3.6 °F)).
Procedure problem causes slow
stabilization and prevents
accurate calibrations or
measurements.
The filling hole is closed. Open the filling hole during use.
The electrical connection
through the reference
junction is not sufficient. Shake the probe in the buffer
solution or adjust the probe on
the sample surface to refresh
the reference junction.
An incorrect buffer solution
was used or the buffer
solution has contamination. Use the specified buffer
solutions of good quality.
The protective tape was not
removed from the filling
hole. Remove the tape from the filling
hole. Refer to
Preparation for
use on page 5.
Section 10 Consumables
Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to
the company website for contact information.
Description Quantity Item no.
Electrode filling solution, saturated KCl 59 mL
1
25118026
KCl crystals 15 g S21M001
Electrode cleaning solution for regular maintenance 500 mL 2965249
1
Larger quantities are available.
16 English