Error List - Hach 5500 Serie Manual Del Usuario

Replace the sensor cartridge
If the sensor has been cleaned but fails calibration, replace the sensor
cartridge. Refer to the instructions in
Dispose of the old sensor cartridge in accordance with local environmental
regulations.
Always calibrate the sensor after maintenance procedures.
Troubleshooting
Intermittent data
During calibration, data is not sent to the datalog. Thus, the datalog can
have areas where the data is intermittent.
Sensor reading is zero
If the sensor reading is always 0, the problem is typically because of a
grounding problem in the junction box. Open the junction box and make
sure that the outer shield wire from the interconnect cable is connected to
the same terminal as the white/black wire from the quick-connect plug. The
outer shield wire should not connect to the ground screw in the junction
box.
Sensor diagnostic and test menu
The sensor diagnostic and test menu shows current and historical
information about the instrument. Refer to
diagnostic and test menu, push the MENU key and select Sensor Setup,
[Select Sensor], DIAG/TEST.
Table 4 Sensor DIAG/TEST menu
Option Description
MODULE INFORMATION Shows the version and the serial number for the
sensor module.
SENSOR INFORMATION Shows the name and serial number that was entered
by the user.
CAL DAYS Shows the number of days since the last calibration.
CAL HISTORY Shows a list of and details for each calibration.
16 English
Assemble the sensor on page 11.
Table 4. To access the sensor
Table 4 Sensor DIAG/TEST menu (continued)
Option Description
RESET CAL HISTORY Resets the calibration history for the sensor (requires
service-level passcode). All previous calibration data
is lost.
SENSOR SIGNALS Shows the current reading in mV and the temperature.
MEMBRANE DAYS Shows the number of days that the sensor has been
in operation.
RESET MEMBRANE Resets the number of days that the sensor has been
in operation.

Error list

Errors may occur for various reasons. The reading on the measurement
screen flashes. All outputs are held when specified in the controller menu.
To show the sensor errors, press the MENU key and select Sensor Diag,
[Select Sensor], Error List. A list of possible errors is shown in
Table 5 Error list for dissolved oxygen sensors
Error Description
DO TOO HIGH The measured value is >
45 ppm
DO TOO LOW The measured value is <
0 ppm
%SAT TOO HIGH The percent saturation is
> 200%
%SAT TOO LOW The percent saturation is
< 0%
TEMP TOO HIGH The measured
temperature is > 50 °C
Table 5.
Resolution
Make sure that the DO level in
the process water is within the
operating limits of the sensor.
Calibrate or replace the sensor.
Calibrate or replace the sensor.
Make sure that the DO level in
the process water is within the
operating limits of the sensor.
Calibrate or replace the sensor.
Calibrate or replace the sensor.
Temperature higher than limit