Hach-Lange PHC30103 User Manual User Manual
Page 11
Message or symptom
Possible cause
Action
Connect a probe or probe
requires service
Probe not connected properly
Disconnect, then connect the probe. Tighten the locking
nut.
Software not updated
To download the most current version of the software,
refer to the applicable product page on the
manufacturer's website.
Refer to the HQd Series meter manual.
Large number of methods stored
on probe
Continue to let the probe connect. Do not disconnect the
probe.
Damaged probe
Make sure there is connectivity with another probe or
meter to confirm isolated issue with probe. Contact a
Technical Support Representative.
pH reading and/or mV
reading is same for all
solutions
Soaker bottle not removed
Remove the soaker bottle.
Electrical issue
Contact a Technical Support Representative.
Standard not recognized
error
Soaker bottle not removed
Remove the soaker bottle.
Incorrect or contaminated buffer
solution
Use fresh buffer solution as specified in the method.
Contaminated filling solution
Drain and replace the filling solution with fresh solution.
Slow stabilization time
Tape not removed from the filling-
hole
Remove the tape that is over the filling hole.
Contaminated glass sensor
on page 9).
Contaminated filling solution
Drain and replace the filling solution with fresh solution.
Filling hole closed
Open the filling hole while in use by removing the filling-
hole cap from the filling hole.
Poor contact between reference
junction and solution
Shake the probe in the solution from side to side to
refresh the reference junction.
Probe not prepared for LIS sample For the best stabilization time, soak the probe in the
sample for 10 to 15 minutes before the initial
measurement.
Low sample temperature or
temperature difference between
samples
Check the sample temperature. The lower the
temperature or the greater the difference of temperatures
between samples, the longer the stabilization time will
be.
Air bubbles around inner
reference electrode
Gently tap the probe with hand or shake the probe
downward to remove any air bubbles.
Calibration errors
Calibration not done correctly
Recalibrate using freshly prepared pH buffers.
Contaminated glass sensor
on page 9).
Slope exceeds the criteria for % of
theoretical (as defined in the
method slope limit)
1.
Widen the slope limits by changing the PHC301
calibration settings and method.
2.
Recalibrate the probe.
3.
Run a check standard to check the performance of
the probe.
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