Hach-Lange SENSION+ 50 49 User Manual - Manual (Page 16)

Error/Warning Description Solution
Measurement out of range
• Insert the probe into the applicable standard and read again.
• Clean the probes.
• Make sure that there are no air bubbles in the probe's sensors.
• Disconnect the multisensor and then connect the multisensor
again.
• Connect a different probe to make sure if problem is with probe
or meter.
E1 Unstable reading during a
stability measurement or
during calibration. Make sure that the probes are properly immersed in the sample.
E2 Probe current: more than
upper limit during
measurement ≥ 250 nA.
• Clean the pH probe and the membrane.
• Make sure that there are no air bubbles in the membrane.
pH probe sensitivity out of
range (accepted values
70–105%).
• Make sure that the buffer that is used is specified in
configuration.
• Replace the buffer solution.
• Clean the pH probe.
Conductivity calibration
error
• Insert the conductivity probe into the applicable standard and
read again.
• Clean the conductivity probe.
• Examine for damage at the conductivity probe sensor, replace
if necessary.
E3 Conductivity calibration
error: cell constant is <
0.05 cm
-1 .
• Insert the conductivity probe into the applicable standard and
read again.
• Clean the conductivity probe.
• Examine for damage at the conductivity probe sensor, replace
if necessary.
Offset out of range
(accepted values ±58 mV).
• Clean the probe.
• Make sure that there are no air bubbles in the sensors.
• Connect a new probe.
E4 Buffer solution not
recognized.
• Clean the probe.
• Make sure that there are no air bubbles in the sensors.
• Make sure that the buffer that is used is specified in
configuration.
• Replace the buffer solution.
• Make sure of the temperature specification in configuration.
Salinity cannot be
calculated TC=0 Change the TC (Temperature Coefficient). Introduce the TC value
at the meter setup to be able to calculate the salinity value. Refer
to meter manual.
E5 The standards used for
calibration are identical.
• Make sure that the buffer that is used is specified in
configuration.
• Replace the buffer solution.
• Make sure of the temperature specification in configuration.
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