Hach sensION+pH3 Manuel D'utilisation page 12

Troubleshooting
Refer to the following table for common problem messages or
symptoms, possible causes and corrective actions.
Table 2 Calibration warnings and errors
Error/Warning
Asymmetry >
Slope out of range (accepted values ± 58 mV).
58 mV
Repeat with
Connect a new probe.
Buffer or electrode
Repeat with
in poor conditions.
Examine the probe: Clean the probe (refer to
Sens. (a) < 70%
probe on page 9 for more information); make sure that
there are no air bubbles in the membrane. Shake the
BUFFER NOT
probe like a thermometer; Connect a different probe to
RECOGNIZED
verify if problem is with probe or meter.
Examine the buffer solution: Make sure that the buffer
used matches the buffer specified in configuration; make
sure of the temperature specification in configuration; use
new buffer solution.
UNSTABLE
Repeat with
READING
Examine the probe: Clean the probe (refer to
Time t> 100 s
probe on page 9 for more information); make sure that
there are no air bubbles in the membrane. Shake the
probe like a thermometer; connect a different probe to
verify if problem is with probe or meter.
Make sure that the membrane and the diaphragm are
properly immersed in the sample.
12 English
Solution
.
.
Clean the
.
Clean the
Table 2 Calibration warnings and errors (continued)
Error/Warning
Electrode in poor Examine the probe: Clean the probe (refer to
conditions. probe on page 9 for more information); make sure that
there are no air bubbles in the membrane. Shake the probe
Check the
like a thermometer; connect a different probe to verify if
electrode
problem is with probe or meter.
SAME BUFFERS
Repeat with
Examine the probe: Clean the probe (refer to
probe on page 9 for more information); make sure that
there are no air bubbles in the membrane. Shake the
probe like a thermometer; connect a different probe to
verify if problem is with probe or meter.
Examine the buffer solution: Use new buffer solution.
Table 3 Measurement warnings and errors
Error/Warning
pH 12.78 19°C
Repeat with
pH out of range Examine the probe: Clean the probe (refer to
probe on page 9 for more information); make sure that
there are no air bubbles in the membrane. Shake the
probe like a thermometer; connect a different probe to
verify if problem is with probe or meter.
Temp out of range °C Examine the temperature sensor.
Connect a different probe to verify if problem is with
probe or meter.
Time > 150 s Make sure that the membrane and the diaphragm are
properly immersed in the sample.
Examine the temperature.
Examine the probe: Clean the probe (refer to
probe on page 9 for more information); make sure that
there are no air bubbles in the membrane. Shake the
probe like a thermometer; connect a different probe to
verify if problem is with probe or meter.
Solution
Clean the
.
Clean the
Solution
.
Clean the
Clean the