Hach sensION+ EC71 Manuel D'utilisation page 17

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
UNSTABLE READING Calibrate again.
Time t> 100 s Examine the probe: Make sure that the probe is properly
immersed in the sample; make sure that there are no air
bubbles inside the probe measuring chamber; rinse the
probe with ethanol.
Check temperature. Make sure the standard temperature is constant during
the calibration.
Check the cell.
Examine the probe: Make sure that the probe is properly
immersed in the sample; make sure that there are no air
bubbles inside the probe measuring chamber; rinse the
probe with ethanol.
STANDARD Calibrate again.
TEMPERATURE
The standard temperature must be between 15 and 35
< 15 °C or > 35 °C ºC.
Difference C > 30 % Calibrate again.
Examine the probe: Make sure that the probe is properly
C < 0.05 or > C > 50.00
immersed in the sample; make sure that there are no air
°C
bubbles inside the probe measuring chamber; rinse the
probe with ethanol; connect a different probe to verify if
SAME BUFFERS
problem is with probe or meter.
Buffer or cell in poor
Examine the standard solution: Use new standard
conditions
solution.
BUFFER NOT
RECOGNIZED
Difference C > 30 %
SAME STANDARDS
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Solution
Table 3 Measurement warnings and errors
Error/Warning
23.2 °C Calibrate again.
728 µS/cm @ 25 °C
EC out of range Examine the probe: Make sure that the probe is properly
immersed in the sample; make sure that there are no air
bubbles inside the probe measuring chamber; rinse the
probe with ethanol; connect a different probe to verify if
problem is with probe or meter.
Out of range °C Examine the temperature sensor.
Connect a different probe to verify if problem is with
probe or meter.
TC = 0 Modify TC
Impossible to measure
salinity
Time > 150 s Examine the temperature.
Examine the probe: Make sure that the probe is properly
immersed in the sample; make sure that there are no air
bubbles inside the probe measuring chamber; rinse the
probe with ethanol; connect a different probe to verify if
problem is with probe or meter.
Replacement parts and accessories
Note: Product and Article numbers may vary for some selling regions. Contact the
appropriate distributor or refer to the company website for contact information.
Replacement parts
Description
sensION+ PH3 Lab pH-meter with accessories, without
probe
sensION+ PH31 Lab pH-meter, GLP, with accessories,
without probe
Solution
Item no.
LPV2000.97.0002
LPV2100.97.0002