Test The Inductive Conductivity Sensor; Sensor Diagnostic And Test Menu - Hach 8398 serie Manual Del Usuario

5.3 Test the inductive conductivity sensor

If there is a doubt concerning the operation of the sensor, disconnect it from the controller but leave it
in place in your sample process. Check the following resistance values across the terminals indicated
(refer also to the wiring table
Wiring connections
Terminals 7-10 (Temperature sensor Pt100)
Terminals 1-2 (Secondary coil)
Terminals 11-12 (Primary coil)
If the checks do not generate any erroneous resistance values, the sensor can be considered to be
working properly.
If the measurement is still not satisfactory proceed as follows:
1. Set T-COMPENSATION to NONE (see
2. Perform a ZERO CALIBRATION of the sensor (see
3. Perform a RESISTOR CALIBRATION of the sensor (see
conductivity sensors)
4. Check the following:
Displayed conductivity (K = 2.35)
470 μS/cm
4.7 mS/cm
47 mS/cm
470 mS/cm

5.4 Sensor diagnostic and test menu

The sensor diagnostic and test menu shows current and historical information about the instrument.
Refer to Table 2.
To access the sensor diagnostic and test menu, push the menu key and select SENSOR
SETUP>[Select Sensor]>DIAG/TEST.
Option
MODULE INFORMATION
SENSOR INFORMATION
CAL DAYS
CAL HISTORY
RESET CAL HISTORY
POLARIZATION
Table 1 on page 6):
Inductive conductivity sensor configuration
on page 16).
Table 2 Sensor DIAG/TEST menu
Resistance
≈ 110 Ω (at 25 °C)
≈ 1—2 Ω
≈ 1—2 Ω
Zero calibration procedure
Resistor calibration (inductive
Simulated resistance
Description
Shows information about the sensor module.
Shows the name and serial number that was entered
by the user.
Shows the number of days since the last calibration.
Shows a list of all calibrations by date/time stamp. Use
the arrows keys to select a calibration and push enter
to view the details.
Resets the calibration history for the sensor (requires
service-level passcode). All previous calibration data is
lost.
Contacting conductivity sensors only. Shows
information about the electrode polarization, the cable
capacitance and the time before the next
measurement.
on page 10).
on page 13).
5 kΩ
500 Ω
50 Ω
5 Ω
English 19