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Beschikbare talen
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Section 6 Troubleshooting
Problem
There is noise on the
signal or irregular
readings
Slow response time
Inaccurate readings
6.1 Error messages
To show the sensor errors, select DIAGNOSTICS > [select sensor] > ERROR LIST. A list of possible
errors is shown in
Table 2
measurement screen flashes and all outputs are held as specified in the controller menu.
Error
ADC FAILURE
The analog to digital conversion failed.
6.2 Warning messages
To show the sensor warnings, select DIAGNOSTICS > [select sensor] > WARNING LIST. A list of
possible warnings is shown in
flashes and a message is shown on the bottom of the controller display. A warning does not affect
the operation of menus, relays and outputs.
Warning
SENS OUT
The measured PAH is not within the
RANGE
measurement range of the sensor.
CONC TOO HIGH The measured PAH is more than the
WARNING LEVEL setting.
REPLACE
The sensor has been in operation
SENSOR
for more than the expected service
life.
CLEAN SENSOR
The number of days since the
sensor was cleaned is more than the
CLEAN DAYS setting.
26 English
Possible cause
Not consistent or
homogeneous sample
stream
Incorrect filtering time or
dirty sensor
Dirty sensor
in the order of priority. When an error occurs, measurements stop, the
Table 2 Error messages
Description
Table 3
in the order of priority. When a warning occurs, a warning icon
Table 3 Warning messages
Description
Enable the SET FILTER setting in sensor configuration. Refer
to
Configure the sensor unit
Start with a low value for the setting (e.g., 3) and increase as
necessary to the lowest filtering level that gets a satisfactory
signal.
Set back the SET FILTER setting in sensor configuration to
the default (disabled)
If necessary, clean sensor. Refer to
on page 23
Clean sensor. Refer to
Clean the sensor
Set the controller to off. Then, set the controller to on.
Clean the sensor. Refer to
on page 23
Or
Dilute the sample water to decrease the measured
PAH.
Clean the sensor. Refer to
on page 23
Or
Increase the WARNING LEVEL setting. Refer to
Configure the sensor unit
Replace the sensor unit. Then, select SENSOR
SETUP > [select sensor] > DIAG/TEST >
COUNTERS > RESET SENSOR.
Clean the sensor. Then, select SENSOR SETUP >
[select sensor] > DIAG/TEST > COUNTERS >
CLEAN SENSOR to set the CLEAN DAYS value to
zero. To change the cleaning interval, refer to the
CLEAN DAYS option in
on page 15.
Solution
on page 15.
Clean the sensor
on page 23.
Solution
Solution
Clean the sensor
Clean the sensor
on page 15.
Configure the sensor unit
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