Hach Polymetron 9526 Manuel D'utilisation De Base page 20

Error
ADC FAILURE
SENSOR MISSING
SENS OUT RANGE
Warning list
A warning icon consists of an exclamation point within a triangle. Warning icons appear on the right
of the main display below the measurement value. A warning does not affect the operation of menus,
relays and outputs. To view warnings, push the menu key and select DIAGNOSTICS. Then select
the device to view any problems associated with that device. The warning icon will no longer be
displayed once the problem has been corrected or acknowledged.
A list of possible warnings is shown in
Warning
MEAS TOO HIGH
MEAS TOO LOW
ZERO TOO HIGH
ZERO TOO LOW
TEMP TOO HIGH
TEMP TOO LOW
CAL OVERDUE
NOT CALIBRATED
REPLACE SENSOR
CAL IN PROGRESS
OUTPUTS ON HOLD
20 English
Table 3 Error list for conductivity sensors
Description
The analog to digital conversion
failed
The sensor is missing or
disconnected
The sensor signal is outside of the
accepted limits (2 S/cm)
Table 4.
Table 4 Warning list for conductivity sensors
Description
The measured value is > 2 S/cm,
1,000,000 ppm, 200% or 20,000 ppt
The measured value is < 0 μS/cm,
0 ppm, 0% or 0 ppt
The zero calibration value is too
high
The zero calibration value is too low
The measured temperature is >
200 °C
The measured temperature is <
-20 °C
The Cal Reminder time has expired
The sensor has not been calibrated
The sensor has been in operation >
365 days
A calibration was started but not
completed
During calibration, the outputs were
set to hold for a selected time.
Resolution
Make sure that the sensor module is
fully inserted into the controller
connector. Replace the sensor
module.
Examine the wiring and connections
for the sensor and for the module.
Make sure that the terminal block is
fully inserted into the module.
Make sure that the display format is
set for the correct measurement
range.
Resolution
Make sure that the display format is
set for the correct measurement
range
Make sure that the sensor is
configured for the correct cell
constant.
Make sure that the sensor is held in
air during zero calibration and is not
located near radio frequency or
electromagnetic interference. Make
sure that the cable is shielded by
metal conduit.
Make sure that the sensor is
configured for the correct
temperature element.
Calibrate the sensor.
Calibrate the sensor.
Calibrate the sensor with a
reference solution and reset the
sensor days. Refer to Sensor
diagnostic and test menu
on page 19. If the calibration fails,
call technical support.
Return to calibration.
The outputs will become active after
the selected time period.