Troubleshooting – Hach-Lange HQD - BOD LDO Probe LBOD User Manual
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DOC272.53.80025
Troubleshooting
Message or symptom
Possible cause
Action
Probe not supported
Software not updated
.com/SoftwareDownloads.
Refer to the HQd
Series Meter manual.
HQd meter does not support IntelliCAL
probe.
Contact a Hach Technical Support Representative.
Connect a probe or
Probe requires service
Probe not connected properly
Disconnect, then connect the probe. Tighten the
locking nut.
Software not updated
.com/SoftwareDownloads
Damaged probe
Verify connectivity with another probe or meter to
confirm isolated issue with probe. Contact a Hach
Technical Representative.
Out of range
Sensor cap scratched or damaged
Replace the LBOD sensor cap.
Large number of methods stored on
probe.
Continue to let probe connect. Do not disconnect
probe.
Temperature and/or pressure sensor
error.
Verify that both temperature and pressure sensors are
reading accurately.
1
Sample outside of specifications
Make sure that the sample measurement is within the
specifications of the probe or contact a Hach Technical
Representative.
Slope out of range
Probe not prepared for sample
Allow the probe to reach equilibrium in a selected
calibration environment (e.g. water saturated air) and
repeat calibration.
Calibration method settings
Verify the calibration standards in the method are
correct.
Sensor cap loose, scratched or damaged
Install or replace the sensor cap.
Temperature and pressure errors
Verify temperature and pressure are reading
accurately.
LED lights not functioning
Contact a Hach Technical Representative.
Stirrer assembly not
rotating
AC power not connected
Connect AC power
Switch in OFF position
Push the ON/OFF switch and verify that the indicator
light is illuminated.
Bent stirrer assembly
Remove the bearing clip and reposition the bearing
position in the bearing pocket. If ineffective, replace the
stirrer assembly.
Stirrer assembly noisy
(> 70 dB Tested 1 inch
from source in < 5 dB
background)
Bent stirrer assembly
Stirrer assembly contacting BOD
container.
Reposition the stirrer assembly in the BOD bottle or
replace the stirring assembly.
O
2
Sensor 0 days
remaining
There are 0 days remaining in the life of
the LBOD sensor cap.
Replace the LBOD sensor cap. Calibration will be
allowed, however the calibration icon along with a
question mark will appear on the measurement screen
even if the calibration has passed.
Meter currently set to incorrect date and
time.
Disconnect the probe from the meter. Set the correct
date and time in the Meter Options menu. Connect the
probe and verify that message has been removed.
Software not updated
Update the HQd software to the latest version and test
again.
O
2
Sensor ## of days
remaining
There are 30 days or fewer remaining in
the life of the LBOD sensor cap.
Replace the LBOD sensor cap soon.