Hach LBOD101, User Manual

Page: 15 / 18

Section 8 Troubleshooting
Problem Possible cause Solution
Decreased probe
performance causes slow
stabilization and prevents
accurate calibrations or
measurements. The sensor cap is loose or
damaged. Tighten or replace the sensor cap.
Always replace the sensor cap and the
iButton at the same time. Refer to
Replace the sensor cap and iButton
on page 9.
Water is between the
sensor cap and the probe
lens. Remove the sensor cap and dry the
probe lens. Refer to
Replace the
sensor cap and iButton on page 9.
The sensor cap is not
sufficiently conditioned. Keep the probe in the BOD bottle with
some water for more time, then try the
calibration again.
The temperature or
pressure sensor does not
operate correctly. Compare the temperature and
pressure readings of the probe with
external measurements. The pressure
sensor reads absolute pressure, which
is not adjusted to sea level. If the
measurements are not correct, contact
technical support.
The lot code on the iButton
is not the same as the lot
code on the sensor cap. Replace the sensor cap and iButton.
The stirrer does not operate
correctly. The stirrer does not
operate. The stirrer uses the power from the
meter to operate. Make sure to start
the meter, then start the stirrer.
The stirrer turns only when
the probe is not in a BOD
bottle. Remove and install the stirrer
assembly. Refer to
Replace the stirrer
on page 12.
The stirrer makes a lot of
noise. Remove and install the stirrer
assembly. Refer to
Replace the stirrer
on page 12.
Sample properties cause
slow stabilization or
inaccurate measurements. The measurement was not
adjusted for salinity in the
sample. Measure the salinity of the sample and
enter the value as a salinity correction
factor in the meter.
Procedure problem causes
slow stabilization and
prevents accurate
calibrations or
measurements. Air bubbles are around or
below the probe tip. Carefully tap or shake the probe to
remove air bubbles.
The contents of the BOD
bottle did not fully adjust to
ambient temperature. Wait more time for the contents of the
BOD bottle to adjust to ambient
temperature.
English 13