Hach-Lange PROGNOSYS - Manual (Page 15)

NITRATAX plus sc
Message Possible cause Solution
Sensor,
Application
check The signal level is too low. The sensor
possibly has a dirty window. The selected
path length is too long (if applicable). The
solid concentration or the turbidity in the
measurement medium can be too high.
• Clean sensor window fully.
• Examine the wiper.
• Examine the measuring medium with a
diluted sample.
• Contact technical support.
R<M
meas ext The measurement absorbance is too high.
The measurement range is too high because
the signal level is too low. The sensor
possibly has a dirty window. Interferences
can be caused by other substances.
• Clean sensor window fully.
• Examine the wiper.
• Examine the solid content of sample.
• Use a cuvette test to examine the nitrate
concentration. If the EM/ER values are
>2.74, use a smaller path length.
• Contact technical support.
ref ext The path length is too long. The wiper does
not operate correctly. The absorbance is too
high because of nitrate concentration or other
UV-absorbing materials.
Wiper blocked The wiper is mechanically blocked. The
measurement window is not clean anymore.
No sample is pulled in the instrument. The
wiper is possibly in front of the window.
• Examine and clean the measurement
window fully.
• Complete a wiper test and do a stop position
test.
• Contact technical support.
Wiper position
unknown
Moist Moisture in the sensor is over limit: the
desiccant is expired. There is possibly a
problem with the gasket set for the sensor
sleeve or the wiper axle. Contact technical support immediately to
replace the gasket, so that the instrument
operates correctly.
R too high The automatic zeroing is not correct. Contact technical support for a zero point
calibration.
Replace
shaftseals The time for the wiper axle gasket cycles is
expired. Contact technical support to replace for a wiper
axle gasket.
Replace profile The time for wiper profile cycles is expired.
• Replace the wiper profile.
• Set the counter when the maintenance task
is completed.
Motor cycle The time for motor cycles is expired. Contact technical support to replace the wiper
motor.
Flash lamp
replace The time for flashes is expired. Contact technical support to replace the flash
lamp.
Replace seals The annual change of the sensor enclosure
gasket is necessary. Contact technical support to replace the sensor
enclosure gasket.
Error Collective error message Examine the error message on the controller.
Refer to the sensor documentation for
solutions.
Warning Collective warning message
ANISE sc/AISE sc/NISE sc
Message 1 Possible cause Solution
Instrument error The instrument caused an
error message. Examine the error message on the controller. Refer to
the sensor documentation for solutions.
Instrument warning The instrument caused a
warning message.
English 13