Hach 3400 Serie Manual Del Usuario página 16

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 5 Sensor DIAG/TEST menu
Option Description
SENSOR INFORMATION Shows the name and serial number that was entered
by the user.
CARD INFORMATION Shows the version and the serial number for the
sensor module.
CAL DAYS Shows the number of days since the last calibration.
CAL HISTORY Shows a list of and details for each calibration.
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 sensor signal and span in µS/cm.
SENSOR DAYS Shows the number of days that the sensor has been
in operation.
RESET SENSOR DAYS 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
16 English
Table 5. To access the sensor
Table 6.
Table 6 Error list for conductivity sensors
Error Description
MEAS TOO The measured value is >
HIGH 2,000,000 µS/cm,
1,000,000 ppm or 20,000
ppt
MEAS TOO The measured value is < 0
LOW µS/cm, 0 ppm or 0 ppt
ZERO TOO The zero calibration value
HIGH is > 500,000 counts
ZERO TOO The zero calibration value
LOW is < –500,000 counts
TEMP TOO The measured
HIGH temperature is > 130 °C
TEMP TOO The measured
LOW temperature is < –10 °C
ADC The analog to digital
FAILURE conversion failed
SENSOR The sensor is missing or
MISSING disconnected
SENS OUT The sensor signal is
RANGE outside of the accepted
limits for the cell constant
that is used (0.01 and 0.05:
100 µS/cm; 0.5: 1000 µS/
cm; 1: 2000 µS/cm; 5:
10,000 µS/cm; 10:
200,000 µS/cm)
Resolution
Make sure that the sensor is
configured for the correct cell
constant.
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. Refer to Test
the conductivity sensor on page 15.
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 sensor is
configured for the correct cell
constant.