Error Messages; Warning Messages - Hach PAH500 Bedienungsanleitung

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
RANGE the measurement range of the
sensor.
CONC TOO The measured PAH is more
HIGH than the WARNING LEVEL
setting.
REPLACE The sensor has been in
SENSOR operation for more than the
expected service life.
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
on page 15.
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
sensor on page 24
Clean sensor. Refer to
on page 24.
Set the controller to off. Then, set the
controller to on.
Clean the sensor. Refer to
on page 24
Or
Dilute the sample water to decrease the
measured PAH.
Clean the sensor. Refer to
on page 24
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.
Solution
Configure the sensor unit
Clean the
Clean the sensor
Solution
Solution
Clean the sensor
Clean the sensor
on page 15.
English 27